libquadmath/acinclude.m4

   1 dnl ----------------------------------------------------------------------
   2 dnl This whole bit snagged from libgfortran.
   3
   4 dnl Check whether the target supports __sync_*_compare_and_swap.
   5 AC_DEFUN([LIBGOMP_CHECK_SYNC_BUILTINS], [
   6   AC_CACHE_CHECK([whether the target supports __sync_*_compare_and_swap],
   7                  libgomp_cv_have_sync_builtins, [
   8   AC_TRY_LINK([], [int foo; __sync_val_compare_and_swap(&foo, 0, 1);],
   9               libgomp_cv_have_sync_builtins=yes, libgomp_cv_have_sync_builtins=no)])
  10   if test $libgomp_cv_have_sync_builtins = yes; then
  11     AC_DEFINE(HAVE_SYNC_BUILTINS, 1,
  12               [Define to 1 if the target supports __sync_*_compare_and_swap])
  13   fi])
  14
  15 dnl Check whether the target supports hidden visibility.
  16 AC_DEFUN([LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY], [
  17   AC_CACHE_CHECK([whether the target supports hidden visibility],
  18                  libgomp_cv_have_attribute_visibility, [
  19   save_CFLAGS="$CFLAGS"
  20   CFLAGS="$CFLAGS -Werror"
  21   AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
  22                  [], libgomp_cv_have_attribute_visibility=yes,
  23                  libgomp_cv_have_attribute_visibility=no)
  24   CFLAGS="$save_CFLAGS"])
  25   if test $libgomp_cv_have_attribute_visibility = yes; then
  26     AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
  27       [Define to 1 if the target supports __attribute__((visibility(...))).])
  28   fi])
  29
  30 dnl Check whether the target supports dllexport
  31 AC_DEFUN([LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT], [
  32   AC_CACHE_CHECK([whether the target supports dllexport],
  33                  libgomp_cv_have_attribute_dllexport, [
  34   save_CFLAGS="$CFLAGS"
  35   CFLAGS="$CFLAGS -Werror"
  36   AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
  37                  [], libgomp_cv_have_attribute_dllexport=yes,
  38                  libgomp_cv_have_attribute_dllexport=no)
  39   CFLAGS="$save_CFLAGS"])
  40   if test $libgomp_cv_have_attribute_dllexport = yes; then
  41     AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
  42       [Define to 1 if the target supports __attribute__((dllexport)).])
  43   fi])
  44
  45 sinclude(../libtool.m4)
  46 dnl The lines below arrange for aclocal not to bring an installed
  47 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
  48 dnl add a definition of LIBTOOL to Makefile.in.
  49 ifelse(,,,[AC_SUBST(LIBTOOL)
  50 AC_DEFUN([AM_PROG_LIBTOOL])
  51 AC_DEFUN([AC_LIBTOOL_DLOPEN])
  52 AC_DEFUN([AC_PROG_LD])
  53 ])