From: Todd C. Miller <Todd.Miller@courtesan.com>
Date: Thu, 1 Mar 2012 18:05:03 +0000 (-0500)
Subject: Add check for variadic macro support in cpp.
X-Git-Tag: SUDO_1_8_5~1^2~180
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=06e390a5660bf99926616371148b39a2e8a10660;p=sudo

Add check for variadic macro support in cpp.
---

diff --git a/configure b/configure
index eaee4872d..18f745fc1 100755
--- a/configure
+++ b/configure
@@ -14584,6 +14584,31 @@ $as_echo "#define volatile /**/" >>confdefs.h
 
 fi
 
+# Check for variadic macro support in cpp
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+$ac_includes_default
+#if defined(__GNUC__) && __GNUC__ == 2
+# define sudo_fprintf(fp, fmt...) fprintf((fp), (fmt))
+#else
+# define sudo_fprintf(fp, ...) fprintf((fp), __VA_ARGS__)
+#endif
+
+int
+main ()
+{
+sudo_fprintf(stderr, "a %s", "test");
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  as_fn_error $? "Your C compiler doesn't support variadic macros, try building with gcc instead" "$LINENO" 5
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 if test X"$with_gnu_ld" != "yes" -a -n "$GCC"; then
     _CFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS -static-libgcc"
diff --git a/configure.in b/configure.in
index 833bf7895..90be2da5c 100644
--- a/configure.in
+++ b/configure.in
@@ -1953,6 +1953,15 @@ dnl
 AC_PROG_GCC_TRADITIONAL
 AC_C_CONST
 AC_C_VOLATILE
+# Check for variadic macro support in cpp
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+AC_INCLUDES_DEFAULT
+#if defined(__GNUC__) && __GNUC__ == 2
+# define sudo_fprintf(fp, fmt...) fprintf((fp), (fmt))
+#else
+# define sudo_fprintf(fp, ...) fprintf((fp), __VA_ARGS__)
+#endif
+], [sudo_fprintf(stderr, "a %s", "test");])], [], [AC_MSG_ERROR([Your C compiler doesn't support variadic macros, try building with gcc instead])])
 if test X"$with_gnu_ld" != "yes" -a -n "$GCC"; then
     _CFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS -static-libgcc"