dnl handle fmt checks
AC_DEFUN([AX_CHECK_FMT], [
AC_ARG_ENABLE(
[fmt],
[AS_HELP_STRING([--enable-fmt], [enable fmt (default: no)])],
[],
[enable_fmt=no]
)
AC_MSG_CHECKING([whether to enable fmt])
AC_MSG_RESULT([$enable_fmt])
dnl The following defines the LIBSEMIGROUPS_FMT_ENABLED preprocessor macro
dnl (the LIBSEMIGROUPS_ prefix is added by another part of the build system)
AS_IF([test "x$enable_fmt" = xyes],
[AC_DEFINE([FMT_ENABLED], [1], [define if building with fmt])])
if test "x$enable_fmt" = xyes; then
AC_ARG_WITH(
[external-fmt],
[AS_HELP_STRING([--with-external-fmt], [use the external fmt (default: no)])],
[],
[with_external_fmt=no]
)
AC_MSG_CHECKING([whether to use external fmt])
AC_MSG_RESULT([$with_external_fmt])
MIN_FMT_VERSION="8.1.1"
fmt_PCDEP=""
if test "x$with_external_fmt" = xyes; then
m4_ifdef([PKG_CHECK_MODULES], [
PKG_CHECK_MODULES([FMT], [fmt >= $MIN_FMT_VERSION])
fmt_PCDEP="fmt"
],
[AC_MSG_ERROR([cannot use flag --with-external-fmt, the libsemigroups configure file was created on a system without m4 macros for pkg-config available...])])
else
AC_SUBST(FMT_CFLAGS, ['-I$(srcdir)/extern/fmt-8.1.1/include'])
fi
AC_SUBST([fmt_PCDEP])
fi
dnl The following makes LIBSEMIGROUPS_WITH_INTERNAL_FMT usable in Makefile.am
AM_CONDITIONAL([LIBSEMIGROUPS_WITH_INTERNAL_FMT], [test "x$enable_fmt" = xyes && test "x$with_external_fmt" != xyes])
])
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