dnl Copyright 2000-2006, 2009, 2011, 2013-2018 Free Software Foundation, Inc.
dnl
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
dnl Some tests use, or must delete, the default compiler output. The
dnl possible filenames are based on what autoconf looks for, namely
dnl
dnl a.out - normal unix style
dnl b.out - i960 systems, including gcc there
dnl a.exe - djgpp
dnl a_out.exe - OpenVMS DEC C called via GNV wrapper (gnv.sourceforge.net)
dnl conftest.exe - various DOS compilers
dnl Need to be careful not to match m6811, m6812, m68hc11 and m68hc12, all
dnl of which config.sub accepts. (Though none of which are likely to work
dnl with GMP.)
dnl define(M68K_PATTERN,
[[m68k-*-* | m68[0-9][0-9][0-9]-*-*]])
dnl GMP_FAT_SUFFIX(DSTVAR, DIRECTORY)
dnl ---------------------------------
dnl Emit code to set shell variable DSTVAR to the suffix for a fat binary
dnl routine from DIRECTORY. DIRECTORY can be a shell expression like $foo
dnl etc.
dnl
dnl The suffix is directory separators / or \ changed to underscores, and
dnl if there's more than one directory part, then the first is dropped.
dnl
dnl For instance,
dnl
dnl x86 -> x86
dnl x86/k6 -> k6
dnl x86/k6/mmx -> k6_mmx
define(GMP_FAT_SUFFIX,
[[$1=`echo $2 | sed -e '/\//s:^[^/]*/::' -e 's:[\\/]:_:g'`]])
dnl GMP_REMOVE_FROM_LIST(listvar,item)
dnl ----------------------------------
dnl Emit code to remove any occurrence of ITEM from $LISTVAR. ITEM can be a
dnl shell expression like $foo if desired.
define(GMP_REMOVE_FROM_LIST,
[remove_from_list_tmp= for remove_from_list_i in $[][$1]; do if test $remove_from_list_i = [$2]; then :; else
remove_from_list_tmp="$remove_from_list_tmp $remove_from_list_i" fi done
[$1]=$remove_from_list_tmp
])
dnl GMP_STRIP_PATH(subdir)
dnl ----------------------
dnl Strip entries */subdir from $path and $fat_path.
define(GMP_STRIP_PATH_VAR,
[tmp_path= for i in $[][$1]; do
case $i in
*/[$2]) ;;
*) tmp_path="$tmp_path $i" ;;
esac done
[$1]="$tmp_path"
])
dnl GMP_INCLUDE_GMP_H
dnl -----------------
dnl Expand to the right way to #include gmp-h.in. This must be used
dnl instead of gmp.h, since that file isn't generated until the end of the
dnl configure.
dnl
dnl Dummy value for GMP_LIMB_BITS is enough
dnl forall current configure-time uses of gmp.h.
dnl GMP_HEADER_GETVAL(NAME,FILE)
dnl ----------------------------
dnl Expand at autoconf time to the value of a "#define NAME" from the given
dnl FILE. The regexps here aren't very rugged, but are enough for gmp.
dnl /dev/null as a parameter prevents a hang if $2 is accidentally omitted.
dnl GMP_VERSION
dnl -----------
dnl The gmp version number, extracted from the #defines in gmp-h.in at
dnl autoconf time. Two digits like 3.0 if patchlevel <= 0, or three digits
dnl like 3.0.1 if patchlevel > 0.
dnl GMP_COMPARE_GE(A1,B1, A2,B2, ...)
dnl ---------------------------------
dnl Compare two version numbers A1.A2.etc and B1.B2.etc. Set
dnl $gmp_compare_ge to yes or no according to the result. The A parts
dnl should be variables, the B parts fixed numbers. As many parts as
dnl desired can be included. An empty string in an A part is taken to be
dnl zero, the B parts should be non-empty and non-zero.
dnl
dnl For example,
dnl
dnl GMP_COMPARE($major,10, $minor,3, $subminor,1)
dnl
dnl would test whether $major.$minor.$subminor is greater than or equal to
dnl 10.3.1.
AC_DEFUN([GMP_COMPARE_GE_INTERNAL],
[ifelse(len([$3]),0,
[if test -n "$1" && test "$1" -ge $2; then
gmp_compare_ge=yes fi],
[if test -n "$1"; then if test "$1" -gt $2; then
gmp_compare_ge=yes else if test "$1" -eq $2; then
GMP_COMPARE_GE_INTERNAL(m4_shift(m4_shift($@))) fi fi fi])
])
dnl GMP_PROG_AR
dnl -----------
dnl GMP additions to $AR.
dnl
dnl A cross-"ar" may be necessary when cross-compiling since the build
dnl system "ar" might try to interpret the object files to build a symbol
dnl table index, hence the use of AC_CHECK_TOOL.
dnl
dnl A user-selected $AR is always left unchanged. AC_CHECK_TOOL is still
dnl run to get the "checking" message printed though.
dnl
dnl If extra flags are added to AR, then ac_cv_prog_AR and
dnl ac_cv_prog_ac_ct_AR are set too, since libtool (cvs 2003-03-31 at
dnl least) will do an AC_CHECK_TOOL and that will AR from one of those two
dnl cached variables. (ac_cv_prog_AR is used if there's an ac_tool_prefix,
dnl or ac_cv_prog_ac_ct_AR is used otherwise.) FIXME: This is highly
dnl dependent on autoconf internals, perhaps it'd work to put our extra
dnl flags into AR_FLAGS instead.
dnl
dnl $AR_FLAGS is set to "cq" rather than leaving it to libtool "cru". The
dnl latter fails when libtool goes into piecewise mode and is unlucky
dnl enough to have two same-named objects in separate pieces, as happens
dnl for instance to random.o (and others) on vax-dec-ultrix4.5. Naturally
dnl a user-selected $AR_FLAGS is left unchanged.
dnl
dnl For reference, $ARFLAGS is used by automake (1.8) for its ".a" archive
dnl file rules. This doesn't get used by the piecewise linking, so we
dnl leave it at the default "cru".
dnl
dnl FIXME: Libtool 1.5.2 has its own arrangements for"cq", but that version
dnl is broken in other ways. When we can upgrade, remove the forcible
dnl AR_FLAGS=cq.
AC_DEFUN([GMP_PROG_AR],
[dnl Want to establish $AR before libtool initialization.
AC_BEFORE([$0],[AC_PROG_LIBTOOL])
gmp_user_AR=$AR
AC_CHECK_TOOL(AR, ar, ar) if test -z "$gmp_user_AR"; then eval arflags=\"\$ar${abi1}_flags\"
test -n "$arflags" || eval arflags=\"\$ar${abi2}_flags\" if test -n "$arflags"; then
AC_MSG_CHECKING([for extra ar flags])
AR="$AR $arflags"
ac_cv_prog_AR="$AR $arflags"
ac_cv_prog_ac_ct_AR="$AR $arflags"
AC_MSG_RESULT([$arflags]) fi fi if test -z "$AR_FLAGS"; then
AR_FLAGS=cq fi
])
dnl GMP_PROG_M4
dnl -----------
dnl Find a working m4, either in $PATH or likely locations, and setup $M4
dnl and an AC_SUBST accordingly. If $M4 is already set then it's a user
dnl choice and is accepted with no checks. GMP_PROG_M4 is like
dnl AC_PATH_PROG or AC_CHECK_PROG, but tests each m4 found to see if it's
dnl good enough.
dnl
dnl See mpn/asm-defs.m4 for details on the known bad m4s.
AC_DEFUN([GMP_PROG_M4],
[AC_ARG_VAR(M4,[m4 macro processor])
AC_CACHE_CHECK([for suitable m4],
gmp_cv_prog_m4,
[if test -n "$M4"; then
gmp_cv_prog_m4="$M4" else cat >conftest.m4 <<\EOF
dnl Must protect this against being expanded during autoconf m4!
dnl Dont put "dnl"s in this as autoconf will flag an error for unexpanded
dnl macros.
[define(dollarhash,``$][#'')ifelse(dollarhash(x),1,`define(t1,Y)',
``bad: $][# not supported (SunOS /usr/bin/m4) '')ifelse(eval(89),89,`define(t2,Y)',
`bad: eval() doesnt support 8 or 9 in a constant (OpenBSD 2.6 m4) ')ifelse(eval(9,9),10,`define(t3,Y)',
`bad: eval() doesnt support radix in eval (FreeBSD 8.x,9.0,9.1,9.2 m4) ')ifelse(t1`'t2`'t3,YYY,`good ')]
EOF
dnl ' <- balance the quotes for emacs sh-mode echo"trying m4" >&AC_FD_CC
gmp_tmp_val=`(m4 conftest.m4) 2>&AC_FD_CC` echo"$gmp_tmp_val" >&AC_FD_CC if test "$gmp_tmp_val" = good; then
gmp_cv_prog_m4="m4" else
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":"
dnl $ac_dummy forces splitting on constant user-supplied paths.
dnl POSIX.2 word splitting is done only on the output of word expansions,
dnl not every word. This closes a longstanding sh security hole.
ac_dummy="$PATH:/usr/5bin" for ac_dir in $ac_dummy; do
test -z "$ac_dir" && ac_dir=. echo"trying $ac_dir/m4" >&AC_FD_CC
gmp_tmp_val=`($ac_dir/m4 conftest.m4) 2>&AC_FD_CC` echo"$gmp_tmp_val" >&AC_FD_CC if test "$gmp_tmp_val" = good; then
gmp_cv_prog_m4="$ac_dir/m4"
break fi done
IFS="$ac_save_ifs" if test -z "$gmp_cv_prog_m4"; then
AC_MSG_ERROR([No usable m4 in \$PATH or /usr/5bin (see config.log for reasons).]) fi fi rm -f conftest.m4 fi])
M4="$gmp_cv_prog_m4"
AC_SUBST(M4)
])
dnl GMP_M4_M4WRAP_SPURIOUS
dnl ----------------------
dnl Check for spurious output from m4wrap(), as described in mpn/asm-defs.m4.
dnl
dnl The following systems have been seen with the problem.
dnl
dnl - Unicos alpha, but its assembler doesn't seem to mind.
dnl - MacOS X Darwin, its assembler fails.
dnl - NetBSD 1.4.1 m68k, and gas 1.92.3 there gives a warning and ignores
dnl the bad last line since it doesn't have a newline.
dnl - NetBSD 1.4.2 alpha, but its assembler doesn't seem to mind.
dnl - HP-UX ia64.
dnl
dnl Enhancement: Maybe this could be in GMP_PROG_M4, and attempt to prefer
dnl an m4 with a working m4wrap, if it can be found.
AC_DEFUN([GMP_M4_M4WRAP_SPURIOUS],
[AC_REQUIRE([GMP_PROG_M4])
AC_CACHE_CHECK([if m4wrap produces spurious output],
gmp_cv_m4_m4wrap_spurious,
[# hide the d-n-l from autoconf's error checking
tmp_d_n_l=d""nl cat >conftest.m4 <<EOF
[changequote({,})define(x,)m4wrap({x})$tmp_d_n_l]
EOF echo test input is >&AC_FD_CC cat conftest.m4 >&AC_FD_CC
tmp_chars=`$M4 conftest.m4 | wc -c` echo produces $tmp_chars chars output >&AC_FD_CC rm -f conftest.m4 if test $tmp_chars = 0; then
gmp_cv_m4_m4wrap_spurious=no else
gmp_cv_m4_m4wrap_spurious=yes fi
])
GMP_DEFINE_RAW(["define(,<$gmp_cv_m4_m4wrap_spurious>)"])
])
dnl GMP_PROG_NM
dnl -----------
dnl GMP additions to libtool AC_PROG_NM.
dnl
dnl Note that if AC_PROG_NM can't find a working nm it still leaves
dnl $NM set to "nm", so $NM can't be assumed to actually work.
dnl
dnl A user-selected $NM is always left unchanged. AC_PROG_NM is still run
dnl to get the "checking" message printed though.
dnl
dnl Perhaps it'd be worthwhile checking that nm works, by running it on an
dnl actual object file. For instance on sparcv9 solaris old versions of
dnl GNU nm don't recognise 64-bit objects. Checking would give a better
dnl error message than just a failure in later tests like GMP_ASM_W32 etc.
dnl
dnl On the other hand it's not really normal autoconf practice to take too
dnl much trouble over detecting a broken set of tools. And libtool doesn't
dnl do anything at allfor say ranlib or strip. So for now we're inclined
dnl to just demand that the user provides a coherent environment.
AC_DEFUN([GMP_PROG_NM],
[dnl Make sure we're the first to call AC_PROG_NM, so our extra flags are
dnl used by everyone.
AC_BEFORE([$0],[AC_PROG_NM])
gmp_user_NM=$NM
AC_PROG_NM
# FIXME: When cross compiling (ie. $ac_tool_prefix not empty), libtool # defaults to plain "nm" if a "${ac_tool_prefix}nm" is not found. In this # case run it again to try the native "nm", firstly so that likely locations # are searched, secondly so that -B or -p are added if necessary for BSD # format. This is necessary for instance on OSF with "./configure # --build=alphaev5-dec-osf --host=alphaev6-dec-osf". # if test -z "$gmp_user_NM" && test -n "$ac_tool_prefix" && test "$NM" = nm; then
$as_unset lt_cv_path_NM
gmp_save_ac_tool_prefix=$ac_tool_prefix
ac_tool_prefix=
NM=
AC_PROG_NM
ac_tool_prefix=$gmp_save_ac_tool_prefix fi
if test -z "$gmp_user_NM"; then eval nmflags=\"\$nm${abi1}_flags\"
test -n "$nmflags" || eval nmflags=\"\$nm${abi2}_flags\" if test -n "$nmflags"; then
AC_MSG_CHECKING([for extra nm flags])
NM="$NM $nmflags"
AC_MSG_RESULT([$nmflags]) fi fi
])
dnl GMP_PROG_CC_WORKS(cc+cflags,[ACTION-IF-WORKS][,ACTION-IF-NOT-WORKS])
dnl --------------------------------------------------------------------
dnl Check if cc+cflags can compile and link.
dnl
dnl This test is designed to be run repeatedly with different cc+cflags
dnl selections, so the result is not cached.
dnl
dnl For a native build, meaning $cross_compiling == no, we require that the
dnl generated program will run. This is the same as AC_PROG_CC does in
dnl _AC_COMPILER_EXEEXT_WORKS, and checking here will ensure we don't pass
dnl a CC/CFLAGS combination that it rejects.
dnl
dnl sparc-*-solaris2.7 can compile ABI=64 but won't run it if the kernel
dnl was booted in 32-bit mode. The effect of requiring the compiler output
dnl will run is that a plain native "./configure" falls back on ABI=32, but
dnl ABI=64 is still available as a cross-compile.
dnl
dnl The various specific problems we try to detect are done in separate
dnl compiles. Although this is probably a bit slower than one test
dnl program, it makes it easy to indicate the problem in AC_MSG_RESULT,
dnl hence giving the user a clue about why we rejected the compiler.
# first see a simple "main()" works, then go on to other checks
GMP_PROG_CC_WORKS_PART([$1], [])
GMP_PROG_CC_WORKS_PART([$1], [function pointer return],
[/* The following provokes an internal error from gcc 2.95.2 -mpowerpc64
(without -maix64), hence detecting an unusable compiler */
void *g() { return (void *) 0; }
void *f() { return g(); }
])
GMP_PROG_CC_WORKS_PART([$1], [cmov instruction],
[/* The following provokes an invalid instruction syntax from i386 gcc
-march=pentiumpro on Solaris 2.8. The native sun assembler
requires a non-standard syntax for cmov which gcc (as of 2.95.2 at
least) doesn't know. */
int n;
int cmov () { return (n >= 0 ? n : 0); }
])
GMP_PROG_CC_WORKS_PART([$1], [double -> ulong conversion],
[/* The following provokes a linker invocation problem with gcc 3.0.3
on AIX 4.3 under "-maix64 -mpowerpc64 -mcpu=630". The -mcpu=630
option causes gcc to incorrectly select the 32-bit libgcc.a, not
the 64-bit one, and consequently it misses out on the __fixunsdfdi
helper (double -> uint64 conversion). */
double d;
unsigned long gcc303 () { return (unsigned long) d; }
])
GMP_PROG_CC_WORKS_PART([$1], [double negation],
[/* The following provokes an error from hppa gcc 2.95 under -mpa-risc-2-0 if
the assembler doesn't know hppa 2.0 instructions. fneg is a 2.0
instruction, and a negation like this comes out using it. */
double fneg_data;
unsigned long fneg () { return -fneg_data; }
])
GMP_PROG_CC_WORKS_PART([$1], [double -> float conversion],
[/* The following makes gcc 3.3 -march=pentium4 generate an SSE2 xmm insn
(cvtsd2ss) which will provoke an error if the assembler doesn't recognise
those instructions. Not sure how much of the gmp code will come out
wanting sse2, but it's easiest to reject an option we know is bad. */
double ftod_data;
float ftod () { return (float) ftod_data; }
])
GMP_PROG_CC_WORKS_PART([$1], [gnupro alpha ev6 char spilling],
[/* The following provokes an internal compiler error from gcc version "2.9-gnupro-99r1" under "-O2 -mcpu=ev6", apparently relating to char
values being spilled into floating point registers. The problem doesn't
show up all the time, but has occurred enough in GMP for us to reject
this compiler+flags. */ #include <string.h> /* for memcpy */
struct try_t
{
char dst[2];
char size;
long d0, d1, d2, d3, d4, d5, d6;
char overlap;
};
struct try_t param[6];
int
param_init ()
{
struct try_t *p;
memcpy (p, ¶m[ 2 ], sizeof (*p));
memcpy (p, ¶m[ 2 ], sizeof (*p));
p->size = 2;
memcpy (p, ¶m[ 1 ], sizeof (*p));
p->dst[0] = 1;
p->overlap = 2;
memcpy (p, ¶m[ 3 ], sizeof (*p));
p->dst[0] = 1;
p->overlap = 8;
memcpy (p, ¶m[ 4 ], sizeof (*p));
memcpy (p, ¶m[ 4 ], sizeof (*p));
p->overlap = 8;
memcpy (p, ¶m[ 5 ], sizeof (*p));
memcpy (p, ¶m[ 5 ], sizeof (*p));
memcpy (p, ¶m[ 5 ], sizeof (*p));
return 0;
}
])
# __builtin_alloca is not available everywhere, check it exists before # seeing that it works
GMP_PROG_CC_WORKS_PART_TEST([$1],[__builtin_alloca availability],
[int k; int foo () { __builtin_alloca (k); }],
[GMP_PROG_CC_WORKS_PART([$1], [alloca array],
[/* The following provokes an internal compiler error from Itanium HP-UX cc
under +O2 or higher. We use this sort of code in mpn/generic/mul_fft.c. */
int k;
int foo ()
{
int i, **a;
a = __builtin_alloca (k); for (i = 0; i <= k; i++)
a[i] = __builtin_alloca (1 << i);
}
])])
GMP_PROG_CC_WORKS_PART([$1], [abs int -> double conversion],
[/* The following provokes an internal error from the assembler on
power2-ibm-aix4.3.1.0. gcc -mrios2 compiles to nabs+fcirz, and this
results in "Internal error related to the source program domain".
For reference it seems to be the combination of nabs+fcirz which is bad,
not either alone. This sort of thing occurs in mpz/get_str.c with the
way double chars_per_bit_exactly is applied in MPN_SIZEINBASE. Perhaps if that code changes to a scaled-integer style then we won't need this
test. */
double fp[1];
int x;
int f ()
{
int a;
a = (x >= 0 ? x : -x);
return a * fp[0];
}
])
GMP_PROG_CC_WORKS_PART([$1], [long long reliability test 1],
[/* The following provokes a segfault in the compiler on powerpc-apple-darwin.
Extracted from tests/mpn/t-iord_u.c. Causes Apple's gcc 3.3 build 1640 and
1666 to segfault with e.g., -O2 -mpowerpc64. */
#if defined (__GNUC__) && ! defined (__cplusplus)
typedef unsigned long long t1;typedef t1*t2;
void g(){}
void h(){}
static __inline__ t1 e(t2 rp,t2 up,int n,t1 v0)
{t1 c,x,r;int i;if(v0){c=1;for(i=1;i<n;i++){x=up[i];r=x+1;rp[i]=r;}}return c;}
void f(){static const struct{t1 n;t1 src[9];t1 want[9];}d[]={{1,{0},{1}},};t1 got[9];int i; for(i=0;i<1;i++){if(e(got,got,9,d[i].n)==0)h();g(i,d[i].src,d[i].n,got,d[i].want,9);if(d[i].n)h();}} #else
int dummy; #endif
])
GMP_PROG_CC_WORKS_PART([$1], [long long reliability test 2],
[/* The following provokes an internal compiler error on powerpc-apple-darwin.
Extracted from mpz/cfdiv_q_2exp.c. Causes Apple's gcc 3.3 build 1640 and
1666 to get an ICE with -O1 -mpowerpc64. */
#if defined (__GNUC__) && ! defined (__cplusplus)
int g();
void f(int u){int i;long long x;x=u?~0:0;if(x)for(i=0;i<9;i++);x&=g();if(x)g();}
int g(){return 0;} #else
int dummy; #endif
])
GMP_PROG_CC_WORKS_PART([$1], [freebsd hacked gcc],
[/* Provokes an ICE on i386-freebsd with the FreeBSD-hacked gcc, under
-O2 -march=amdfam10. We call helper functions here "open" and "close" in
order for linking to succeed. */
#if defined (__GNUC__) && ! defined (__cplusplus)
int open(int*,int*,int);void*close(int);void g(int*rp,int*up,int un){
__builtin_expect(un<=0x7f00,1)?__builtin_alloca(un):close(un);if(__builtin_clzl
(up[un])){open(rp,up,un);while(1){if(rp[un-1]!=0)break;un--;}}} #else
int dummy; #endif
])
GMP_PROG_CC_WORKS_PART_MAIN([$1], [mpn_lshift_com optimization],
[/* The following is mis-compiled by HP ia-64 cc version
cc: HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]
under "cc +O3", both in +DD32 and +DD64 modes. The mpn_lshift_com gets
inlined and its return value somehow botched to be 0 instead of 1. This
arises in the real mpn_lshift_com in mul_fft.c. A lower optimization
level, like +O2 seems ok. This code needs to be run to show the problem,
but that's fine, the offending cc is a native-only compiler so we don't
have to worry about cross compiling. */
#if ! defined (__cplusplus)
unsigned long
lshift_com (rp, up, n, cnt)
unsigned long *rp;
unsigned long *up;
long n;
unsigned cnt;
{
unsigned long retval, high_limb, low_limb;
unsigned tnc;
long i;
tnc = 8 * sizeof (unsigned long) - cnt;
low_limb = *up++;
retval = low_limb >> tnc;
high_limb = low_limb << cnt; for (i = n - 1; i != 0; i--)
{
low_limb = *up++;
*rp++ = ~(high_limb | (low_limb >> tnc));
high_limb = low_limb << cnt;
}
return retval;
}
int
main ()
{
unsigned long cy, rp[2], up[2];
up[0] = ~ 0L;
up[1] = 0;
cy = lshift_com (rp, up, 2L, 1); if (cy != 1L)
return 1;
return 0;
} #else
int
main ()
{
return 0;
} #endif
])
GMP_PROG_CC_WORKS_PART_MAIN([$1], [mpn_lshift_com optimization 2],
[/* The following is mis-compiled by Intel ia-64 icc version 1.8 under "icc -O3", After several calls, the function writes partial garbage to
the result vector. Perhaps relates to the chk.a.nc insn. This code needs
to be run to show the problem, but that's fine, the offending cc is a
native-only compiler so we don't have to worry about cross compiling. */
#if ! defined (__cplusplus) #include <stdlib.h>
void
lshift_com (rp, up, n, cnt)
unsigned long *rp;
unsigned long *up;
long n;
unsigned cnt;
{
unsigned long high_limb, low_limb;
unsigned tnc;
long i;
up += n;
rp += n;
tnc = 8 * sizeof (unsigned long) - cnt;
low_limb = *--up;
high_limb = low_limb << cnt; for (i = n - 1; i != 0; i--)
{
low_limb = *--up;
*--rp = ~(high_limb | (low_limb >> tnc));
high_limb = low_limb << cnt;
}
*--rp = ~high_limb;
}
int
main ()
{
unsigned long *r, *r2;
unsigned long a[88 + 1];
long i; for (i = 0; i < 88 + 1; i++)
a[i] = ~0L;
r = calloc (10000, sizeof (unsigned long));
r2 = r; for (i = 0; i < 528; i += 23)
{
lshift_com (r2, a,
i / (8 * sizeof (unsigned long)) + 1,
i % (8 * sizeof (unsigned long)));
r2 += 88 + 1;
} if (r[2048] != 0 || r[2049] != 0 || r[2050] != 0 || r[2051] != 0 ||
r[2052] != 0 || r[2053] != 0 || r[2054] != 0)
abort ();
free (r);
return 0;
} #else
int
main ()
{
return 0;
} #endif
])
# A certain _GLOBAL_OFFSET_TABLE_ problem in past versions of gas, tickled # by recent versions of gcc. # if test "$gmp_prog_cc_works" = yes; then
case $host in
X86_PATTERN) # this problem only arises in PIC code, so don't need to test when # --disable-shared. We don't necessarily have $enable_shared set to # yes at this point, it will still be unset for the default (which is # yes); hence the use of "!= no". if test "$enable_shared" != no; then
GMP_PROG_CC_X86_GOT_EAX_EMITTED([$1],
[GMP_ASM_X86_GOT_EAX_OK([$1],,
[gmp_prog_cc_works="no, bad gas GOT with eax"])]) fi
;;
esac fi
AC_MSG_RESULT($gmp_prog_cc_works)
case $gmp_prog_cc_works in
yes)
[$2]
;;
*)
[$3]
;;
esac
])
dnl Called: GMP_PROG_CC_WORKS_PART(CC+CFLAGS,FAIL-MESSAGE [,CODE])
dnl A dummy main() is appended to the CODE given.
dnl
AC_DEFUN([GMP_PROG_CC_WORKS_PART],
[GMP_PROG_CC_WORKS_PART_MAIN([$1],[$2],
[$3]
[int main () { return 0; }])
])
dnl Called: GMP_PROG_CC_WORKS_PART_MAIN(CC+CFLAGS,FAIL-MESSAGE,CODE)
dnl CODE must include a main().
dnl
AC_DEFUN([GMP_PROG_CC_WORKS_PART_MAIN],
[GMP_PROG_CC_WORKS_PART_TEST([$1],[$2],[$3],
[],
gmp_prog_cc_works="no[]m4_if([$2],,,[[, ]])[$2]",
gmp_prog_cc_works="no[]m4_if([$2],,,[[, ]])[$2][[, program does not run]]")
])
dnl Called: GMP_PROG_CC_WORKS_PART_TEST(CC+CFLAGS,TITLE,[CODE],
dnl [ACTION-GOOD],[ACTION-BAD][ACTION-NORUN])
dnl
AC_DEFUN([GMP_PROG_CC_WORKS_PART_TEST],
[if test "$gmp_prog_cc_works" = yes; then # remove anything that might look like compiler output to our "||" expression rm -f conftest* a.out b.out a.exe a_out.exe cat >conftest.c <<EOF
[$3]
EOF echo"Test compile: [$2]" >&AC_FD_CC
gmp_compile="$1 conftest.c >&AC_FD_CC" if AC_TRY_EVAL(gmp_compile); then
cc_works_part=yes if test "$cross_compiling" = no; then if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then :; else
cc_works_part=norun fi fi else
cc_works_part=no fi if test "$cc_works_part" != yes; then echo"failed program was:" >&AC_FD_CC cat conftest.c >&AC_FD_CC fi rm -f conftest* a.out b.out a.exe a_out.exe
case $cc_works_part in
yes)
$4
;;
no)
$5
;;
norun)
$6
;;
esac fi
])
dnl GMP_PROG_CC_WORKS_LONGLONG(cc+cflags,[ACTION-YES][,ACTION-NO])
dnl --------------------------------------------------------------
dnl Check that cc+cflags accepts "long long".
dnl
dnl This test is designed to be run repeatedly with different cc+cflags
dnl selections, so the result is not cached.
AC_DEFUN([GMP_PROG_CC_WORKS_LONGLONG],
[AC_MSG_CHECKING([compiler $1 has long long]) cat >conftest.c <<EOF
long long foo;
long long bar () { return foo; }
int main () { return 0; }
EOF
gmp_prog_cc_works=no
gmp_compile="$1 -c conftest.c >&AC_FD_CC" if AC_TRY_EVAL(gmp_compile); then
gmp_prog_cc_works=yes else echo"failed program was:" >&AC_FD_CC cat conftest.c >&AC_FD_CC fi rm -f conftest* a.out b.out a.exe a_out.exe
AC_MSG_RESULT($gmp_prog_cc_works) if test $gmp_prog_cc_works = yes; then
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_C_TEST_SIZEOF(cc/cflags,test,[ACTION-GOOD][,ACTION-BAD])
dnl ------------------------------------------------------------
dnl The given cc/cflags compiler is run to check the size of a type
dnl specified by the "test" argument. "test" can either be a string, or a
dnl variable like $foo. The value should be for instance "sizeof-long-4",
dnl to test that sizeof(long)==4.
dnl
dnl This test is designed to be run for different compiler and/or flags
dnl combinations, so the result is not cached.
dnl
dnl The idea for making an array that has a negative size if the desired
dnl condition test is false comes from autoconf AC_CHECK_SIZEOF. The cast
dnl to "long" in the array dimension also follows autoconf, apparently it's
dnl a workaround for a HP compiler bug.
AC_DEFUN([GMP_C_TEST_SIZEOF],
[echo"configure: testlist $2" >&AC_FD_CC
[gmp_sizeof_type=`echo"$2" | sed 's/sizeof-\([a-z\*]*\).*/\1/'`]
[gmp_sizeof_want=`echo"$2" | sed 's/sizeof-[a-z\*]*-\([0-9]*\).*/\1/'`]
AC_MSG_CHECKING([compiler $1 has sizeof($gmp_sizeof_type)==$gmp_sizeof_want]) cat >conftest.c <<EOF
[int
main ()
{
static int test_array [1 - 2 * (long) (sizeof ($gmp_sizeof_type) != $gmp_sizeof_want)];
test_array[0] = 0;
return 0;
}]
EOF
gmp_c_testlist_sizeof=no
gmp_compile="$1 -c conftest.c >&AC_FD_CC" if AC_TRY_EVAL(gmp_compile); then
gmp_c_testlist_sizeof=yes fi rm -f conftest*
AC_MSG_RESULT($gmp_c_testlist_sizeof) if test $gmp_c_testlist_sizeof = yes; then
ifelse([$3],,:,[$3]) else
ifelse([$4],,:,[$4]) fi
])
dnl GMP_PROG_CC_IS_GNU(CC,[ACTIONS-IF-YES][,ACTIONS-IF-NO])
dnl -------------------------------------------------------
dnl Determine whether the given compiler is GNU C.
dnl
dnl This test is the same as autoconf _AC_LANG_COMPILER_GNU, but doesn't
dnl cache the result. The same "ifndef" style test is used, to avoid
dnl problems with syntax checking cpp's used on NeXT and Apple systems.
AC_DEFUN([GMP_PROG_CC_IS_GNU],
[cat >conftest.c <<EOF #if ! defined (__GNUC__) || defined (__INTEL_COMPILER)
choke me #endif
EOF
gmp_compile="$1 -c conftest.c >&AC_FD_CC" if AC_TRY_EVAL(gmp_compile); then rm -f conftest*
AC_MSG_CHECKING([whether $1 is gcc])
AC_MSG_RESULT(yes)
ifelse([$2],,:,[$2]) else rm -f conftest*
ifelse([$3],,:,[$3]) fi
])
dnl GMP_PROG_CC_IS_XLC(CC,[ACTIONS-IF-YES][,ACTIONS-IF-NO])
dnl -------------------------------------------------------
dnl Determine whether the given compiler is IBM xlc (on AIX).
dnl
dnl There doesn't seem to be a preprocessor symbol to test for this, or if
dnl there is one then it's well hidden in xlc 3.1 on AIX 4.3, so just grep
dnl the man page printed when xlc is invoked with no arguments.
AC_DEFUN([GMP_PROG_CC_IS_XLC],
[gmp_command="$1 2>&1 | grep xlc >/dev/null" if AC_TRY_EVAL(gmp_command); then
AC_MSG_CHECKING([whether $1 is xlc])
AC_MSG_RESULT(yes)
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_PROG_CC_X86_GOT_EAX_EMITTED(CC+CFLAGS, [ACTION-YES] [, ACTION-NO])
dnl ----------------------------------------------------------------------
dnl Determine whether CC+CFLAGS emits instructions using %eax with
dnl _GLOBAL_OFFSET_TABLE_. This test is for use on x86 systems.
dnl
dnl Recent versions of gcc will use %eax for the GOT in leaf functions, for
dnl instance gcc 3.3.3 with -O3. This avoids having to save and restore
dnl %ebx which otherwise usually holds the GOT, and is what gcc used in the
dnl past.
dnl
dnl %ecx and %edx are also candidates for this sort of optimization, and
dnl are used under lesser optimization levels, like -O2 in 3.3.3. FIXME:
dnl It's not quite clear what the conditions for using %eax are, we might
dnl need more test code to provoke it.
dnl
dnl The motivation for this test is that past versions of gas have bugs
dnl affecting this usage, see GMP_ASM_X86_GOT_EAX_OK.
dnl
dnl This test is not specific to gcc, other compilers might emit %eax GOT
dnl insns like this, though we've not investigated that.
dnl
dnl This is for use by compiler probing in GMP_PROG_CC_WORKS, so we doesn't
dnl cache the result.
dnl
dnl -fPIC is hard coded here, because this test is for use before libtool
dnl has established the pic options. It's right for gcc, but perhaps not
dnl other compilers.
AC_DEFUN([GMP_PROG_CC_X86_GOT_EAX_EMITTED],
[echo"Testing gcc GOT with eax emitted" >&AC_FD_CC cat >conftest.c <<\EOF
[int foo;
int bar () { return foo; }
]EOF
tmp_got_emitted=no
gmp_compile="$1 -fPIC -S conftest.c >&AC_FD_CC 2>&1" if AC_TRY_EVAL(gmp_compile); then if grep "addl.*_GLOBAL_OFFSET_TABLE_.*eax" conftest.s >/dev/null; then
tmp_got_emitted=yes fi fi rm -f conftest.* echo"Result: $tmp_got_emitted" >&AC_FD_CC if test "$tmp_got_emitted" = yes; then
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_HPC_HPPA_2_0(cc,[ACTION-IF-GOOD][,ACTION-IF-BAD])
dnl ---------------------------------------------------------
dnl Find out whether a HP compiler is good enough to generate hppa 2.0.
dnl
dnl This test might be repeated for different compilers, so the result is
dnl not cached.
AC_DEFUN([GMP_HPC_HPPA_2_0],
[AC_MSG_CHECKING([whether HP compiler $1 is good for 64-bits]) # Bad compiler output: # ccom: HP92453-01 G.10.32.05 HP C Compiler # Good compiler output: # ccom: HP92453-01 A.10.32.30 HP C Compiler # Let A.10.32.30 or higher be ok. echo >conftest.c
gmp_tmp_vs=`$1 $2 -V -c -o conftest.$OBJEXT conftest.c 2>&1 | grep "^ccom:"` echo"Version string: $gmp_tmp_vs" >&AC_FD_CC rm conftest*
gmp_tmp_v1=`echo $gmp_tmp_vs | sed 's/.* .\.\([[0-9]]*\).*/\1/'`
gmp_tmp_v2=`echo $gmp_tmp_vs | sed 's/.* .\..*\.\(.*\)\..* HP C.*/\1/'`
gmp_tmp_v3=`echo $gmp_tmp_vs | sed 's/.* .\..*\..*\.\(.*\) HP C.*/\1/'` echo"Version number: $gmp_tmp_v1.$gmp_tmp_v2.$gmp_tmp_v3" >&AC_FD_CC if test -z "$gmp_tmp_v1"; then
gmp_hpc_64bit=not-applicable else
GMP_COMPARE_GE($gmp_tmp_v1, 10, $gmp_tmp_v2, 32, $gmp_tmp_v3, 30)
gmp_hpc_64bit=$gmp_compare_ge fi
AC_MSG_RESULT($gmp_hpc_64bit) if test $gmp_hpc_64bit = yes; then
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_GCC_ARM_UMODSI(CC,[ACTIONS-IF-GOOD][,ACTIONS-IF-BAD])
dnl ---------------------------------------------------------
dnl gcc 2.95.3 and earlier on arm has a bug in the libgcc __umodsi routine
dnl making "%" give wrong results for some operands, eg. "0x90000000 % 3".
dnl We're hoping it'll be fixed in 2.95.4, and we know it'll be fixed in
dnl gcc 3.
dnl
dnl There's only a couple of places gmp cares about this, one is the
dnl size==1 case in mpn/generic/mode1o.c, and this shows up in
dnl tests/mpz/t-jac.c as a wrong result from mpz_kronecker_ui.
AC_DEFUN([GMP_GCC_ARM_UMODSI],
[AC_MSG_CHECKING([whether ARM gcc unsigned division works])
tmp_version=`$1 --version` echo"$tmp_version" >&AC_FD_CC
case $tmp_version in
[2.95 | 2.95.[123]])
ifelse([$3],,:,[$3])
gmp_gcc_arm_umodsi_result=["no, gcc 2.95.[0123]"] ;;
*)
ifelse([$2],,:,[$2])
gmp_gcc_arm_umodsi_result=yes ;;
esac
AC_MSG_RESULT([$gmp_gcc_arm_umodsi_result])
])
dnl GMP_GCC_MIPS_O32(gcc,[actions-yes][,[actions-no]])
dnl -------------------------------------------------
dnl Test whether gcc supports o32.
dnl
dnl gcc 2.7.2.2 only does o32, and doesn't accept -mabi=32.
dnl
dnl gcc 2.95 accepts -mabi=32 but it only works on irix5, on irix6 it gives
dnl "cc1: The -mabi=32 support does not work yet".
AC_DEFUN([GMP_GCC_MIPS_O32],
[AC_MSG_CHECKING([whether gcc supports o32]) echo'int x;' >conftest.c echo"$1 -mabi=32 -c conftest.c" >&AC_FD_CC if $1 -mabi=32 -c conftest.c >conftest.out 2>&1; then
result=yes else cat conftest.out >&AC_FD_CC if grep "cc1: Invalid option \`abi=32'" conftest.out >/dev/null; then
result=yes else
result=no fi fi rm -f conftest.*
AC_MSG_RESULT($result) if test $result = yes; then
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_GCC_NO_CPP_PRECOMP(CCBASE,CC,CFLAGS,[ACTIONS-YES][,ACTIONS-NO])
dnl -------------------------------------------------------------------
dnl Check whether -no-cpp-precomp should be used on this compiler, and
dnl execute the corresponding ACTIONS-YES or ACTIONS-NO.
dnl
dnl -no-cpp-precomp is only meant for Apple's hacked version of gcc found
dnl on powerpc*-*-darwin*, but we can give it a try on any gcc. Normal gcc
dnl (as of 3.0 at least) only gives a warning, not an actual error, and we
dnl watch for that and decide against the option in that case, to avoid
dnl confusing the user.
AC_DEFUN([GMP_GCC_NO_CPP_PRECOMP],
[if test "$ccbase" = gcc; then
AC_MSG_CHECKING([compiler $2 $3 -no-cpp-precomp])
result=no cat >conftest.c <<EOF
int main () { return 0; }
EOF
gmp_compile="$2 $3 -no-cpp-precomp conftest.c >conftest.out 2>&1" if AC_TRY_EVAL(gmp_compile); then if grep "unrecognized option.*-no-cpp-precomp" conftest.out >/dev/null; then : ; else
result=yes fi fi cat conftest.out >&AC_FD_CC rm -f conftest* a.out b.out a.exe a_out.exe
AC_MSG_RESULT($result) if test "$result" = yes; then
ifelse([$4],,:,[$4]) else
ifelse([$5],,:,[$5]) fi fi
])
dnl GMP_GCC_PENTIUM4_SSE2(CC+CFLAGS,[ACTION-IF-YES][,ACTION-IF-NO])
dnl ---------------------------------------------------------------
dnl Determine whether gcc CC+CFLAGS is a good enough version for
dnl -march=pentium4 with sse2.
dnl
dnl Gcc 3.2.1 was seen generating incorrect code for raw double -> int
dnl conversions through a union. We believe the problem is in all 3.1 and
dnl 3.2 versions, but that it's fixed in 3.3.
AC_DEFUN([GMP_GCC_PENTIUM4_SSE2],
[AC_MSG_CHECKING([whether gcc is good for sse2])
case `$1 -dumpversion` in
[3.[012] | 3.[012].*]) result=no ;;
*) result=yes ;;
esac
AC_MSG_RESULT($result) if test "$result" = yes; then
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_GCC_WA_MCPU(CC+CFLAGS, NEWFLAG [,ACTION-YES [,ACTION-NO]])
dnl --------------------------------------------------------------
dnl Check whether gcc (or gas rather) accepts a flag like "-Wa,-mev67".
dnl
dnl Gas doesn't give an error for an unknown cpu, it only prints a warning
dnl like "Warning: Unknown CPU identifier `ev78'".
dnl
dnl This is intended for use on alpha, since only recent versions of gas
dnl accept -mev67, but there's nothing here that's alpha specific.
AC_DEFUN([GMP_GCC_WA_MCPU],
[AC_MSG_CHECKING([assembler $1 $2])
result=no cat >conftest.c <<EOF
int main () {}
EOF
gmp_compile="$1 $2 -c conftest.c >conftest.out 2>&1" if AC_TRY_EVAL(gmp_compile); then if grep "Unknown CPU identifier" conftest.out >/dev/null; then : ; else
result=yes fi fi cat conftest.out >&AC_FD_CC rm -f conftest*
AC_MSG_RESULT($result) if test "$result" = yes; then
ifelse([$3],,:,[$3]) else
ifelse([$4],,:,[$4]) fi
])
dnl GMP_GCC_WA_OLDAS(CC+CFLAGS [,ACTION-YES [,ACTION-NO]])
dnl ------------------------------------------------------
dnl Check whether gcc should be run with "-Wa,-oldas".
dnl
dnl On systems alpha*-*-osf* (or maybe just osf5), apparently there's a
dnl newish Compaq "as" which doesn't work with the gcc mips-tfile.
dnl Compiling an empty file with "gcc -c foo.c" produces for instance
dnl
dnl mips-tfile, /tmp/ccaqUNnF.s:7 Segmentation fault
dnl
dnl The fix is to pass "-oldas" to that assembler, as noted by
dnl
dnl http://gcc.gnu.org/install/specific.html#alpha*-dec-osf*
dnl
dnl The test here tries to compile an empty file, and if that fails but
dnl adding -Wa,-oldas makes it succeed, then that flag is considered
dnl necessary.
dnl
dnl We look for the failing case specifically, since it may not be a good
dnl idea to use -Wa,-oldas in other circumstances. For instance gas takes
dnl "-oldas" to mean the "-o" option and will write a file called "ldas" as
dnl its output. Normally gcc puts its own "-o" after any -Wa options, so
dnl -oldas ends up being harmless, but clearly that's only through good
dnl luck.
dnl
dnl This macro is designed for use while probing for a good compiler, and
dnl so doesn't cache it's result.
AC_DEFUN([GMP_GCC_WA_OLDAS],
[AC_MSG_CHECKING([for $1 -Wa,-oldas])
result=no cat >conftest.c <<EOF
EOF echo"with empty conftest.c" >&AC_FD_CC
gmp_compile="$1 -c conftest.c >&AC_FD_CC 2>&1" if AC_TRY_EVAL(gmp_compile); then : ; else # empty fails
gmp_compile="$1 -Wa,-oldas -c conftest.c >&AC_FD_CC 2>&1" if AC_TRY_EVAL(gmp_compile); then # but with -Wa,-oldas it works
result=yes fi fi rm -f conftest*
AC_MSG_RESULT($result) if test "$result" = yes; then
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_OS_X86_XMM(CC+CFLAGS,[ACTION-IF-YES][,ACTION-IF-NO])
dnl --------------------------------------------------------
dnl Determine whether the operating system supports XMM registers.
dnl
dnl If build==host then a test program is run, executing an SSE2
dnl instruction using an XMM register. This will give a SIGILL if the
dnl system hasn't set the OSFXSR bit in CR4 to say it knows it must use
dnl fxsave/fxrestor in a context switch (to save xmm registers).
dnl
dnl If build!=host, we can fallback on:
dnl
dnl - FreeBSD version 4 is the first supporting xmm.
dnl
dnl - Linux kernel 2.4 might be the first stable series supporting xmm
dnl (not sure). But there's no version number in the GNU/Linux
dnl config tuple to test anyway.
dnl
dnl The default is to allow xmm. This might seem rash, but it's likely
dnl most systems know xmm by now, so this will normally be what's wanted.
dnl And cross compiling is a bit hairy anyway, so hopefully anyone doing it
dnl will be smart enough to know what to do.
dnl
dnl In the test program, .text and .globl are hard coded because this macro
dnl is wanted before GMP_ASM_TEXT and GMP_ASM_GLOBL are run. A .byte
dnl sequence is used (for xorps %xmm0, %xmm0) to make us independent of
dnl tests for whether the assembler supports sse2/xmm. Obviously we need
dnl both assembler and OS support, but this means we don't force the order
dnl in which we test.
dnl
dnl FIXME: Maybe we should use $CCAS to assemble, if it's set. (Would
dnl still want $CC/$CFLAGS for the link.) But this test is used before
dnl AC_PROG_CC sets $OBJEXT, so we'd need to check for various object file
dnl suffixes ourselves.
AC_DEFUN([GMP_OS_X86_XMM],
[AC_CACHE_CHECK([whether the operating system supports XMM registers],
gmp_cv_os_x86_xmm,
[if test "$build" = "$host"; then # remove anything that might look like compiler output to our "||" expression rm -f conftest* a.out b.out a.exe a_out.exe cat >conftest.s <<EOF
.text
main:
_main:
.globl main
.globl _main
.byte 0x0f, 0x57, 0xc0
xorl %eax, %eax
ret
EOF
gmp_compile="$1 conftest.s -o conftest >&AC_FD_CC" if AC_TRY_EVAL(gmp_compile); then if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then
gmp_cv_os_x86_xmm=yes else
gmp_cv_os_x86_xmm=no fi else
AC_MSG_WARN([Oops, cannot compile test program]) fi rm -f conftest* fi
if test -z "$gmp_cv_os_x86_xmm"; then
case $host_os in
[freebsd[123] | freebsd[123].*])
gmp_cv_os_x86_xmm=no ;;
freebsd*)
gmp_cv_os_x86_xmm=yes ;;
*)
gmp_cv_os_x86_xmm=probably ;;
esac fi
])
if test "$gmp_cv_os_x86_xmm" = probably; then
AC_MSG_WARN([Not certain of OS support for xmm when cross compiling.])
AC_MSG_WARN([Will assume it's ok, expect a SIGILL if this is wrong.]) fi
case $gmp_cv_os_x86_xmm in
no)
$3
;;
*)
$2
;;
esac
])
dnl GMP_CRAY_HOST_TYPES(C90/T90-IEEE, C90/T90-CFP, J90/SV1)
dnl -------------------------------------------------------
dnl Execute the actions in the arguments on the respective Cray vector
dnl systems. For other hosts, do nothing.
dnl
dnl This macro should be used after the C compiler has been chosen, since
dnl on c90 and t90 we ask the compiler whether we're in IEEE or CFP float
dnl mode.
dnl
dnl This code is in a macro so that any AC_REQUIRE pre-requisites of
dnl AC_EGREP_CPP will be expanded at the top-level, ie. forall hosts not
dnl merely c90 and t90. In autoconf 2.57 for instance this means
dnl AC_PROG_EGREP, which is needed by various other macros.
dnl GMP_HPPA_LEVEL_20(cc/cflags [, ACTION-GOOD [,ACTION-BAD]])
dnl ----------------------------------------------------------
dnl Check that the given cc/cflags accepts HPPA 2.0n assembler code.
dnl
dnl Old versions of gas don't know 2.0 instructions. It rejects ".level
dnl 2.0" for a start, so just test that.
dnl
dnl This test is designed to be run for various different compiler and
dnl flags combinations, and hence doesn't cache its result.
AC_DEFUN([GMP_HPPA_LEVEL_20],
[AC_MSG_CHECKING([$1 assembler knows hppa 2.0])
result=no cat >conftest.s <<EOF
.level 2.0
EOF
gmp_compile="$1 -c conftest.s >&AC_FD_CC 2>&1" if AC_TRY_EVAL(gmp_compile); then
result=yes else echo"failed program was" >&AC_FD_CC cat conftest.s >&AC_FD_CC fi rm -f conftest*
AC_MSG_RESULT($result) if test "$result" = yes; then
ifelse([$2],,:,[$2]) else
ifelse([$3],,:,[$3]) fi
])
dnl GMP_PROG_CXX_WORKS(cxx/cxxflags [, ACTION-YES [,ACTION-NO]])
dnl ------------------------------------------------------------
dnl Check whether cxx/cxxflags can compile and link.
dnl
dnl This test is designed to be run repeatedly with different cxx/cxxflags
dnl selections, so the result is not cached.
dnl
dnl For a native build, we insist on being able to run the program, so as
dnl to detect any problems with the standard C++ library. During
dnl development various systems with broken or incomplete C++ installations
dnl were seen.
dnl
dnl The various features and problems we try to detect are done in separate
dnl compiles. Although this is probably a bit slower than one test
dnl program, it makes it easy to indicate the problem in AC_MSG_RESULT,
dnl hence giving the user a clue about why we rejected the compiler.
# start with a plain "main()", then go on to further checks
GMP_PROG_CXX_WORKS_PART([$1], [])
GMP_PROG_CXX_WORKS_PART([$1], [namespace],
[namespace foo { }
using namespace foo;
])
# GMP requires the standard C++ iostream classes
GMP_PROG_CXX_WORKS_PART([$1], [std iostream],
[/* This test rejects g++ 2.7.2 which doesn't have , only a
pre-standard iostream.h. */ #include <iostream>
/* This test rejects OSF 5.1 Compaq C++ in its default pre-standard iostream
mode, since that mode puts cout in the global namespace, not "std". */
void someoutput (void) { std::cout << 123; }
])
AC_MSG_RESULT($gmp_prog_cxx_works)
case $gmp_prog_cxx_works in
yes)
[$2]
;;
*)
[$3]
;;
esac
])
dnl Called: GMP_PROG_CXX_WORKS_PART(CXX+CXXFLAGS, FAIL-MESSAGE [,CODE])
dnl
AC_DEFUN([GMP_PROG_CXX_WORKS_PART],
[if test "$gmp_prog_cxx_works" = yes; then # remove anything that might look like compiler output to our "||" expression rm -f conftest* a.out b.out a.exe a_out.exe cat >conftest.cc <<EOF
[$3]
int main (void) { return 0; }
EOF echo"Test compile: [$2]" >&AC_FD_CC
gmp_cxxcompile="$1 conftest.cc >&AC_FD_CC" if AC_TRY_EVAL(gmp_cxxcompile); then if test "$cross_compiling" = no; then if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then :; else
gmp_prog_cxx_works="no[]m4_if([$2],,,[, ])[$2], program does not run" fi fi else
gmp_prog_cxx_works="no[]m4_if([$2],,,[, ])[$2]" fi
case $gmp_prog_cxx_works in
no*) echo"failed program was:" >&AC_FD_CC cat conftest.cc >&AC_FD_CC
;;
esac rm -f conftest* a.out b.out a.exe a_out.exe fi
])
dnl GMP_INIT([M4-DEF-FILE])
dnl -----------------------
dnl Initializations for GMP config.m4 generation.
dnl
dnl FIXME: The generated config.m4 doesn't get recreated by config.status.
dnl Maybe the relevant "echo"s should go through AC_CONFIG_COMMANDS.
# CONFIG_TOP_SRCDIR is a path from the mpn builddir to the top srcdir. # The pattern here tests for an absolute path the same way as # _AC_OUTPUT_FILES in autoconf acgeneral.m4.
case $srcdir in
[[\\/]]* | ?:[[\\/]]* ) tmp="$srcdir" ;;
*) tmp="../$srcdir" ;;
esac echo ["define(,<\`$tmp'>)"] >>$gmp_tmpconfigm4
# All CPUs use asm-defs.m4 echo ["include][(CONFIG_TOP_SRCDIR\`/mpn/asm-defs.m4')"] >>$gmp_tmpconfigm4i
])
dnl GMP_FINISH
dnl ----------
dnl Create config.m4 from its accumulated parts.
dnl
dnl __CONFIG_M4_INCLUDED__ is used so that a second or subsequent include
dnl of config.m4 is harmless.
dnl
dnl A separate ifdef on the angle bracket quoted part ensures the quoting
dnl style there is respected. The basic defines from gmp_tmpconfigm4 are
dnl fully quoted but are still put under an ifdef in case any have been
dnl redefined by one of the m4 include files.
dnl
dnl Doing a big ifdef within asm-defs.m4 and/or other macro files wouldn't
dnl work, since it'd interpret parentheses and quotes in dnl comments, and
dnl having a whole file as a macro argument would overflow the string space
dnl on BSD m4.
AC_DEFUN([GMP_FINISH],
[AC_REQUIRE([GMP_INIT]) echo"creating $gmp_configm4" echo ["d""nl $gmp_configm4. Generated automatically by configure."] > $gmp_configm4 if test -f $gmp_tmpconfigm4; then echo ["changequote(<,>)"] >> $gmp_configm4 echo ["ifdef(<__CONFIG_M4_INCLUDED__>,,<"] >> $gmp_configm4 cat $gmp_tmpconfigm4 >> $gmp_configm4 echo [">)"] >> $gmp_configm4 echo ["changequote(\`,')"] >> $gmp_configm4 rm $gmp_tmpconfigm4 fi echo ["ifdef(\`__CONFIG_M4_INCLUDED__',,\`"] >> $gmp_configm4 if test -f $gmp_tmpconfigm4i; then cat $gmp_tmpconfigm4i >> $gmp_configm4 rm $gmp_tmpconfigm4i fi if test -f $gmp_tmpconfigm4p; then cat $gmp_tmpconfigm4p >> $gmp_configm4 rm $gmp_tmpconfigm4p fi echo ["')"] >> $gmp_configm4 echo ["define(\`__CONFIG_M4_INCLUDED__')"] >> $gmp_configm4
])
dnl GMP_INCLUDE_MPN(FILE)
dnl ---------------------
dnl Add an include_mpn(`FILE') to config.m4. FILE should be a path
dnl relative to the mpn source directory, for example
dnl
dnl GMP_INCLUDE_MPN(`x86/x86-defs.m4')
dnl
dnl GMP_DEFINE(MACRO, DEFINITION [, LOCATION])
dnl ------------------------------------------
dnl Define M4 macro MACRO as DEFINITION in temporary file.
dnl
dnl If LOCATION is `POST', the definition will appear after any include()
dnl directives inserted by GMP_INCLUDE. Mind the quoting! No shell
dnl variables will get expanded. Don't forget to invoke GMP_FINISH to
dnl create file config.m4. config.m4 uses `<' and '>' as quote characters
dnl forall defines.
dnl GMP_DEFINE_RAW(STRING [, LOCATION])
dnl ------------------------------------
dnl Put STRING into config.m4 file.
dnl
dnl If LOCATION is `POST', the definition will appear after any include()
dnl directives inserted by GMP_INCLUDE. Don't forget to invoke GMP_FINISH
dnl to create file config.m4.
dnl GMP_TRY_ASSEMBLE(asm-code,[action-success][,action-fail])
dnl ----------------------------------------------------------
dnl Attempt to assemble the given code.
dnl Do"action-success"if this succeeds, "action-fail"if not.
dnl
dnl conftest.o and conftest.out are available for inspection in
dnl "action-success". If either action does a "break" out of a loop then
dnl an explicit "rm -f conftest*" will be necessary.
dnl
dnl This is not unlike AC_TRY_COMPILE, but there's no default includes or
dnl anything in "asm-code", everything wanted must be given explicitly.
AC_DEFUN([GMP_TRY_ASSEMBLE],
[cat >conftest.s <<EOF
[$1]
EOF
gmp_assemble="$CCAS $CFLAGS $CPPFLAGS conftest.s >conftest.out 2>&1" if AC_TRY_EVAL(gmp_assemble); then cat conftest.out >&AC_FD_CC
ifelse([$2],,:,[$2]) else cat conftest.out >&AC_FD_CC echo"configure: failed program was:" >&AC_FD_CC cat conftest.s >&AC_FD_CC
ifelse([$3],,:,[$3]) fi rm -f conftest*
])
dnl Checks whether the stack can be marked nonexecutable by passing an option
dnl to the C-compiler when acting on .s files. Appends that option to ASMFLAGS.
dnl This macro is adapted from one found in GLIBC-2.3.5.
dnl FIXME: This test looks broken. It tests that a file with .note.GNU-stack...
dnl can be compiled/assembled with -Wa,--noexecstack. It does not determine
dnl if that command-line option has any effect on general asm code.
AC_DEFUN([CL_AS_NOEXECSTACK],[
dnl AC_REQUIRE([AC_PROG_CC]) GMP uses something else
AC_CACHE_CHECK([whether assembler supports --noexecstack option],
cl_cv_as_noexecstack, [dnl cat > conftest.c <<EOF
void foo() {}
EOF if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS
-S -o conftest.s conftest.c >/dev/null]) \
&& grep .note.GNU-stack conftest.s >/dev/null \
&& AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS -Wa,--noexecstack
-c -o conftest.o conftest.s >/dev/null]) then
cl_cv_as_noexecstack=yes else
cl_cv_as_noexecstack=no fi rm -f conftest*]) if test "$cl_cv_as_noexecstack" = yes; then
ASMFLAGS="$ASMFLAGS -Wa,--noexecstack" fi
AC_SUBST(ASMFLAGS)
])
dnl GMP_ASM_LABEL_SUFFIX
dnl --------------------
dnl : - is usual.
dnl empty - hppa on HP-UX doesn't use a :, just the label name
dnl
dnl Note that it's necessary to test the empty case first, since HP "as"
dnl will accept "somelabel:", and take it to mean a label with a name that
dnl happens to end in a colon.
AC_DEFUN([GMP_ASM_LABEL_SUFFIX],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([for assembler label suffix],
gmp_cv_asm_label_suffix,
[gmp_cv_asm_label_suffix=unknown for i in """:"; do echo"trying $i" >&AC_FD_CC
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
somelabel$i],
[gmp_cv_asm_label_suffix=$i rm -f conftest*
break],
[cat conftest.out >&AC_FD_CC]) done if test "$gmp_cv_asm_label_suffix" = "unknown"; then
AC_MSG_ERROR([Cannot determine label suffix]) fi
]) echo ["define(, <$gmp_cv_asm_label_suffix>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_UNDERSCORE
dnl ------------------
dnl Determine whether global symbols need to be prefixed with an underscore.
dnl The output from "nm" is grepped to see what a typical symbol looks like.
dnl
dnl This test used to grep the .o file directly, but that failed with greps
dnl that don't like binary files (eg. SunOS 4).
dnl
dnl This test also used to construct an assembler file with and without an
dnl underscore and try to link that to a C file, to see which worked.
dnl Although that's what will happen in the real build we don't really want
dnl to depend on creating asm files within configure for every possible CPU
dnl (or at least we don't want to do that more than we have to).
dnl
dnl The fallback on no underscore is based on the assumption that the world
dnl is moving towards non-underscore systems. There should actually be no
dnl good reason for nm to fail though.
AC_DEFUN([GMP_ASM_UNDERSCORE],
[AC_REQUIRE([GMP_PROG_NM])
AC_CACHE_CHECK([if globals are prefixed by underscore],
gmp_cv_asm_underscore,
[gmp_cv_asm_underscore="unknown" cat >conftest.c <<EOF
int gurkmacka;
EOF
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&AC_FD_CC" if AC_TRY_EVAL(gmp_compile); then
$NM conftest.$OBJEXT >conftest.out if grep "[[ ]]_gurkmacka" conftest.out >/dev/null; then
gmp_cv_asm_underscore=yes elif grep "[[ ]]gurkmacka" conftest.out >/dev/null; then
gmp_cv_asm_underscore=no else echo"configure: $NM doesn't have gurkmacka:" >&AC_FD_CC cat conftest.out >&AC_FD_CC fi else echo"configure: failed program was:" >&AC_FD_CC cat conftest.c >&AC_FD_CC fi rm -f conftest*
])
case $gmp_cv_asm_underscore in
yes)
GMP_DEFINE(GSYM_PREFIX, [_]) ;;
no)
GMP_DEFINE(GSYM_PREFIX, []) ;;
*)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| Cannot determine global symbol prefix.])
AC_MSG_WARN([| $NM output doesn't contain a global data symbol.])
AC_MSG_WARN([| Will proceed with no underscore.])
AC_MSG_WARN([| If this is wrong then you'll get link errors referring])
AC_MSG_WARN([| to ___gmpn_add_n (note three underscores).])
AC_MSG_WARN([| In this case do a fresh build with an override,])
AC_MSG_WARN([| ./configure gmp_cv_asm_underscore=yes])
AC_MSG_WARN([+----------------------------------------------------------])
GMP_DEFINE(GSYM_PREFIX, [])
;;
esac
])
dnl GMP_ASM_ALIGN_LOG
dnl -----------------
dnl Is parameter to `.align' logarithmic?
AC_DEFUN([GMP_ASM_ALIGN_LOG],
[AC_REQUIRE([GMP_ASM_GLOBL])
AC_REQUIRE([GMP_ASM_BYTE])
AC_REQUIRE([GMP_ASM_DATA])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_PROG_NM])
AC_CACHE_CHECK([if .align assembly directive is logarithmic],
gmp_cv_asm_align_log,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_data
.align 4
$gmp_cv_asm_globl foo
$gmp_cv_asm_byte 1
.align 4
foo$gmp_cv_asm_label_suffix
$gmp_cv_asm_byte 2],
[gmp_tmp_val=[`$NM conftest.$OBJEXT | grep foo | \
sed -e 's;[[][0-9][]]\(.*\);\1;' -e 's;[^1-9]*\([0-9]*\).*;\1;'`] if test "$gmp_tmp_val" = "10" || test "$gmp_tmp_val" = "16"; then
gmp_cv_asm_align_log=yes else
gmp_cv_asm_align_log=no fi],
[AC_MSG_ERROR([cannot assemble alignment test])])])
dnl GMP_ASM_ALIGN_FILL_0x90
dnl -----------------------
dnl Determine whether a ",0x90" suffix works on a .align directive.
dnl This is only meant for use on x86, 0x90 being a "nop".
dnl
dnl Old gas, eg. 1.92.3
dnl Needs ",0x90" or else the fill is 0x00, which can't be executed
dnl across.
dnl
dnl New gas, eg. 2.91
dnl Generates multi-byte nop fills even when ",0x90" is given.
dnl
dnl Solaris 2.6 as
dnl ",0x90" is not allowed, causes a fatal error.
dnl
dnl Solaris 2.8 as
dnl ",0x90" does nothing, generates a warning that it's being ignored.
dnl
dnl SCO OpenServer 5 as
dnl Second parameter is max bytes to fill, not a fill pattern.
dnl ",0x90" is an error due to being bigger than the first parameter.
dnl Multi-byte nop fills are generated in text segments.
dnl
dnl Note that both solaris "as"s only care about ",0x90"if they actually
dnl have to use it to fill something, hence the .byte in the test. It's
dnl the second .align which provokes the error or warning.
dnl
dnl The warning from solaris 2.8 is suppressed to stop anyone worrying that
dnl something might be wrong.
AC_DEFUN([GMP_ASM_ALIGN_FILL_0x90],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the .align directive accepts an 0x90 fill in .text],
gmp_cv_asm_align_fill_0x90,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
.align 4, 0x90
.byte 0
.align 4, 0x90],
[if grep "Warning: Fill parameter ignored for executable section" conftest.out >/dev/null; then echo"Suppressing this warning by omitting 0x90" 1>&AC_FD_CC
gmp_cv_asm_align_fill_0x90=no else
gmp_cv_asm_align_fill_0x90=yes fi],
[gmp_cv_asm_align_fill_0x90=no])])
dnl GMP_ASM_BYTE
dnl ------------
dnl .byte - is usual.
dnl data1 - required by ia64 (on hpux at least).
dnl
dnl This macro is just to support other configure tests, not any actual asm
dnl code.
AC_DEFUN([GMP_ASM_BYTE],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_CACHE_CHECK([for assembler byte directive],
gmp_cv_asm_byte,
[for i in .byte data1; do echo"trying $i" >&AC_FD_CC
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_data
$i 0
],
[gmp_cv_asm_byte=$i rm -f conftest*
break],
[cat conftest.out >&AC_FD_CC]) done if test -z "$gmp_cv_asm_byte"; then
AC_MSG_ERROR([Cannot determine how to emit a data byte]) fi
])
])
dnl GMP_ASM_TEXT
dnl ------------
dnl .text - is usual.
dnl .code - is needed by the hppa on HP-UX (but ia64 HP-UX uses .text)
dnl .csect .text[PR] - is for AIX.
AC_DEFUN([GMP_ASM_TEXT],
[AC_CACHE_CHECK([how to switch to text section],
gmp_cv_asm_text,
[for i in ".text"".code" [".csect .text[PR]"]; do echo"trying $i" >&AC_FD_CC
GMP_TRY_ASSEMBLE([ $i],
[gmp_cv_asm_text=$i rm -f conftest*
break]) done if test -z "$gmp_cv_asm_text"; then
AC_MSG_ERROR([Cannot determine text section directive]) fi
]) echo ["define(, <$gmp_cv_asm_text>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_DATA
dnl ------------
dnl Can we say `.data'?
AC_DEFUN([GMP_ASM_DATA],
[AC_CACHE_CHECK([how to switch to data section],
gmp_cv_asm_data,
[case $host in
*-*-aix*) gmp_cv_asm_data=[".csect .data[RW]"] ;;
*) gmp_cv_asm_data=".data" ;;
esac
]) echo ["define(, <$gmp_cv_asm_data>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_RODATA
dnl --------------
dnl Find out how to switch to the read-only data section.
dnl
dnl The compiler output is grepped for the right directive. It's not
dnl considered wise to just probe for".section .rodata" or whatever works,
dnl since arbitrary section names might be accepted, but not necessarily do
dnl the right thing when they get to the linker.
dnl
dnl Only a few asm files use RODATA, so this code is perhaps a bit
dnl excessive right now, but should find more uses in the future.
dnl
dnl FIXME: gcc on aix generates something like ".csect _foo.ro_c[RO],3"
dnl where foo is the object file. Might need to check for that if we use
dnl RODATA there.
AC_DEFUN([GMP_ASM_RODATA],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_DATA])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_ASM_UNDERSCORE])
AC_CACHE_CHECK([how to switch to read-only data section],
gmp_cv_asm_rodata,
[
dnl Default to DATA on CPUs with split code/data caching, and TEXT
dnl elsewhere. i386 means generic x86, so use DATA on it.
case $host in
X86_PATTERN | x86_64-*-*)
gmp_cv_asm_rodata="$gmp_cv_asm_data" ;;
*)
gmp_cv_asm_rodata="$gmp_cv_asm_text" ;;
esac
cat >conftest.c <<EOF
extern const int foo[[]]; /* Suppresses C++'s suppression of foo */
const int foo[[]] = {1,2,3};
EOF echo"Test program:" >&AC_FD_CC cat conftest.c >&AC_FD_CC
gmp_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c >&AC_FD_CC" if AC_TRY_EVAL(gmp_compile); then echo"Compiler output:" >&AC_FD_CC cat conftest.s >&AC_FD_CC if test $gmp_cv_asm_underscore = yes; then
tmp_gsym_prefix=_ else
tmp_gsym_prefix= fi # must see our label if grep "^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix" conftest.s >/dev/null 2>&AC_FD_CC; then # take the last directive before our label (hence skipping segments # getting debugging info etc)
tmp_match=`sed -n ["/^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix/q
/^[. ]*data/p
/^[. ]*rdata/p
/^[. ]*text/p
/^[. ]*section/p
/^[. ]*csect/p
/^[. ]*CSECT/p"] conftest.s | sed -n '$p'` echo"Match: $tmp_match" >&AC_FD_CC if test -n "$tmp_match"; then
gmp_cv_asm_rodata=$tmp_match fi else echo"Couldn't find label: ^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix" >&AC_FD_CC fi fi rm -f conftest*
]) echo ["define(, <$gmp_cv_asm_rodata>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_GLOBL
dnl -------------
dnl The assembler directive to mark a label as a global symbol.
dnl
dnl ia64 - .global is standard, according to the Intel documentation.
dnl
dnl hppa - ".export foo,entry" is demanded by HP hppa "as". ".global" is a
dnl kind of import.
dnl
dnl other - .globl is usual.
dnl
dnl "gas" tends to accept .globl everywhere, in addition to .export or
dnl .global or whatever the system assembler demands.
dnl GMP_ASM_GLOBL_ATTR
dnl ------------------
dnl Do we need something after `GLOBL symbol'?
AC_DEFUN([GMP_ASM_GLOBL_ATTR],
[AC_REQUIRE([GMP_ASM_GLOBL])
AC_CACHE_CHECK([for assembler global directive attribute],
gmp_cv_asm_globl_attr,
[case $gmp_cv_asm_globl in
--> --------------------
--> maximum size reached
--> --------------------
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