trunk-47381HEADmaster

1 files changed, 41 insertions, 0 deletions

diff --git a/tools/missing-macros/src/m4/mfx_cppflags.m4 b/tools/missing-macros/src/m4/mfx_cppflags.m4
new file mode 100644
index 0000000..0ad9141
--- /dev/null
+++ b/tools/missing-macros/src/m4/mfx_cppflags.m4
@@ -0,0 +1,41 @@
+# serial 1
+
+AC_DEFUN([mfx_PROG_CPPFLAGS], [
+AC_MSG_CHECKING([whether the C preprocessor needs special flags])
+
+AC_LANG_CONFTEST([AC_LANG_PROGRAM(
+[[#include <limits.h>
+#if (32767 >= 4294967295ul) || (65535u >= 4294967295ul)
+#  include "your C preprocessor is broken 1"
+#elif (0xffffu == 0xfffffffful)
+#  include "your C preprocessor is broken 2"
+#elif (32767 >= ULONG_MAX) || (65535u >= ULONG_MAX)
+#  include "your C preprocessor is broken 3"
+#endif
+]], [[ ]]
+)])
+
+mfx_save_CPPFLAGS=$CPPFLAGS
+mfx_tmp=ERROR
+for mfx_arg in "" -no-cpp-precomp
+do
+  CPPFLAGS="$mfx_arg $mfx_save_CPPFLAGS"
+  _AC_COMPILE_IFELSE([],
+[mfx_tmp=$mfx_arg
+break])
+done
+CPPFLAGS=$mfx_save_CPPFLAGS
+rm -f conftest.$ac_ext conftest.$ac_objext
+case x$mfx_tmp in
+  x)
+    AC_MSG_RESULT([none needed]) ;;
+  xERROR)
+    AC_MSG_RESULT([ERROR])
+    AC_MSG_ERROR([your C preprocessor is broken - for details see config.log])
+    ;;
+  *)
+    AC_MSG_RESULT([$mfx_tmp])
+    CPPFLAGS="$mfx_tmp $CPPFLAGS"
+    ;;
+esac
+])# mfx_PROG_CPPFLAGS