dnl handle planarity checks
dnl
dnl if --with-external-planarity is supplied,
dnl use it if it is known to pkg-config and is new enough;
dnl otherwise use the included version
dnl
AC_DEFUN([AX_CHECK_PLANARITY], [
AC_ARG_WITH([external-planarity],
[AS_HELP_STRING([--with-external-planarity],
[use external planarity])],
[],
[with_external_planarity=no])
AC_MSG_CHECKING([whether to use external planarity])
AC_MSG_RESULT([$with_external_planarity])
AS_IF([test "x$with_external_planarity" = xyes], [
AC_MSG_CHECKING([for external libplanarity])
saved_LIBS="$LIBS"
LIBS="$LIBS -lplanarity"
AC_LANG_PUSH([C])
AC_LINK_IFELSE([AC_LANG_SOURCE([ #include <planarity/c/graphLib/graphLib.h> #if defined(GP_PROJECTVERSION_MAJOR) && GP_PROJECTVERSION_MAJOR >= 4 #else #error too old #endif
int main(void) { gp_InitGraph(0, 0); }
])], [
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([not found or too old])
LIBS="$saved_LIBS"
with_external_planarity=no
])
AC_LANG_POP()
])
AS_IF([test "x$with_external_planarity" = xno], [
WITH_INCLUDED_PLANARITY=yes
AC_SUBST(WITH_INCLUDED_PLANARITY)
AC_DEFINE([WITH_INCLUDED_PLANARITY],
[1],
[define that we should use the vendored planarity])
])
])
¤ Dauer der Verarbeitung: 0.15 Sekunden
(vorverarbeitet)
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