diff options
Diffstat (limited to 'infrastructure/m4/ax_check_define_pragma.m4')
-rw-r--r-- | infrastructure/m4/ax_check_define_pragma.m4 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/infrastructure/m4/ax_check_define_pragma.m4 b/infrastructure/m4/ax_check_define_pragma.m4 new file mode 100644 index 00000000..176faf3d --- /dev/null +++ b/infrastructure/m4/ax_check_define_pragma.m4 @@ -0,0 +1,25 @@ +dnl @synopsis AX_CHECK_DEFINE_PRAGMA([ACTION-IF-TRUE], [ACTION-IF-FALSE]) +dnl +dnl This macro will find out if the compiler will accept #pragma inside a +dnl #define. HAVE_DEFINE_PRAGMA will be defined if this is the case, and +dnl ACTION-IF-TRUE and ACTION-IF-FALSE are run as appropriate +dnl +dnl @category C +dnl @author Martin Ebourne +dnl @version 2005/07/03 +dnl @license AllPermissive + +AC_DEFUN([AX_CHECK_DEFINE_PRAGMA], [ + AC_CACHE_CHECK([for pre-processor pragma defines], [have_define_pragma], + [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ + #define TEST_DEFINE #pragma pack(1) + TEST_DEFINE + ]])], + [have_define_pragma=yes], [have_define_pragma=no] + )]) + if test "x$have_define_pragma" = "xyes"; then + AC_DEFINE([HAVE_DEFINE_PRAGMA], 1, [Define to 1 if #define of pragmas works]) + m4_ifvaln([$1],[$1],[:])dnl + m4_ifvaln([$2],[else $2])dnl + fi + ])dnl |