remove c++ warnings flag .. this is not c++ after all

[rrdtool.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 101520f..7d77122 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -61,6 +61,8 @@ AH_TOP([
 AH_BOTTOM([
 /* make sure that we pickup the correct stuff from all headers */
 #ifdef HAVE_FEATURES_H
+#undef _XOPEN_SOURCE /* keep unmodified */
+#undef _BSD_SOURCE /* keep unmodified */
 #define _XOPEN_SOURCE 600
 #define _BSD_SOURCE 1
 # include <features.h>
@@ -337,7 +339,7 @@ CFLAGS="$CFLAGS -D_GNU_SOURCE"
 
 dnl which flags does the compiler support?
 if test "x$GCC" = "xyes"; then
-  for flag in -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wc++-compat -Wold-style-definition -W; do
+  for flag in -fno-strict-aliasing -Wall -std=c99 -pedantic -Wundef -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline -Wold-style-definition -W; do
     oCFLAGS="$CFLAGS"
     CFLAGS="$CFLAGS $flag"
     cachename=rd_cv_gcc_flag_`echo $flag|sed 's/[[^A-Za-z]]/_/g'`