vector.c: Move interface to own file.

[nmh] / m4 / cppflags.m4

diff --git a/m4/cppflags.m4 b/m4/cppflags.m4
index d2cd351e26a67a313c4b398fe524e08d700e61ab..b860ea6780cec0d07bf9f94d8168d865627745e5 100644 (file)
--- a/m4/cppflags.m4
+++ b/m4/cppflags.m4
@@ -1,4 +1,3 @@
-dnl

 dnl This is intended to be extensible, by just adding candidate C preprocessor
 dnl options to be checked in the for loop.  The first candidate is empty, in
 dnl case none are needed.  Also, the test program can be readily augmented.
 dnl This is intended to be extensible, by just adding candidate C preprocessor
 dnl options to be checked in the for loop.  The first candidate is empty, in
 dnl case none are needed.  Also, the test program can be readily augmented.


@@ -23,6 +22,9 @@ AC_DEFUN([NMH_ADDL_CPPFLAGS],
     AC_LANG_WERROR
 
     nmh_saved_cppflags="$CPPFLAGS"
     AC_LANG_WERROR
 
     nmh_saved_cppflags="$CPPFLAGS"

+    dnl autoconf doesn't look at AM_CFLAGS, so merge it into CFLAGS.
+    nmh_saved_cflags="$CFLAGS"
+    CFLAGS="$AM_CFLAGS $CFLAGS"

     dnl On successful compilation, break out of loop with the AM_CPPFLAGS.
     for nmh_cv_addl_cppflags in "" "-D_GNU_SOURCE"; do
         dnl Reload initial CPPFLAGS so candidates aren't accumulated.
     dnl On successful compilation, break out of loop with the AM_CPPFLAGS.
     for nmh_cv_addl_cppflags in "" "-D_GNU_SOURCE"; do
         dnl Reload initial CPPFLAGS so candidates aren't accumulated.


@@ -40,8 +42,10 @@ AC_DEFUN([NMH_ADDL_CPPFLAGS],
                   [AC_LANG_PROGRAM([#include <string.h>],
                                    [return strdup("x") == 0])],
                   [AM_CPPFLAGS="${nmh_cv_addl_cppflags}"; break;])])
                   [AC_LANG_PROGRAM([#include <string.h>],
                                    [return strdup("x") == 0])],
                   [AM_CPPFLAGS="${nmh_cv_addl_cppflags}"; break;])])

-    done])
+    done
+    CFLAGS="$nmh_saved_cflags"

     CPPFLAGS="$nmh_saved_cppflags"
     CPPFLAGS="$nmh_saved_cppflags"

+    ])

 
     dnl autoconf doesn't currently provide a macro to disable AC_LANG_WERROR,
     dnl so do it this way:
 
     dnl autoconf doesn't currently provide a macro to disable AC_LANG_WERROR,
     dnl so do it this way: