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-rwxr-xr-xconfigure20
1 files changed, 20 insertions, 0 deletions
diff --git a/configure b/configure
index 3df9d07f4a..43d87c5276 100755
--- a/configure
+++ b/configure
@@ -1697,6 +1697,23 @@ if compile_prog "" "" ; then
fi
##########################################
+# check if the compiler understands attribute warn_unused_result
+#
+# This could be smarter, but gcc -Werror does not error out even when warning
+# about attribute warn_unused_result
+
+gcc_attribute_warn_unused_result=no
+cat > $TMPC << EOF
+#if defined(__GNUC__) && (__GNUC__ < 4) && defined(__GNUC_MINOR__) && (__GNUC__ < 4)
+#error gcc 3.3 or older
+#endif
+int main(void) { return 0;}
+EOF
+if compile_prog "" ""; then
+ gcc_attribute_warn_unused_result=yes
+fi
+
+##########################################
# check if we have fdatasync
fdatasync=no
@@ -2030,6 +2047,9 @@ fi
if test "$need_offsetof" = "yes" ; then
echo "CONFIG_NEED_OFFSETOF=y" >> $config_host_mak
fi
+if test "$gcc_attribute_warn_unused_result" = "yes" ; then
+ echo "CONFIG_GCC_ATTRIBUTE_WARN_UNUSED_RESULT=y" >> $config_host_mak
+fi
if test "$fdatasync" = "yes" ; then
echo "CONFIG_FDATASYNC=y" >> $config_host_mak
fi