commit: d4810a4c2a8163a5ae2e2339e40c93064b2a4f79
parent: d401cd57fbd7e82c8728d7117607fd0d3154a703
author: Brian Callahan <bcallah@openbsd.org>
date: Sat, 31 Oct 2020 18:25:07 -0400
If the user didn't specify CFLAGS on the command line, check to see
if the compiler can use -g -O2 as default flags (similar to GNU
default flags) and use those if the compiler can.
Should figure out good default flags for other compilers too. But
-g -O2 will cover all the gcc and clang permutations, which is the
vast majority of compiles.
This is a noop if the user did specify CFLAGS on the command line.
1 file changed, 28 insertions(+), 4 deletions(-)
diff --git a/configure b/configure
@@ -265,6 +265,20 @@ EOF
fi
}
+defaultcflagscheck() {
+ cat << EOF > conftest.c
+int main(void){return 0;}
+EOF
+ $cc $cflags -g -O2 -o conftest.o -c conftest.c > /dev/null 2>&1
+ if [ $? -eq 0 ] ; then
+ rm -f conftest conftest.o conftest.c
+ return 1
+ else
+ rm -f conftest conftest.o conftest.c
+ return 0
+ fi
+}
+
issetugidcheck() {
cat << EOF > conftest.c
#include <unistd.h>
@@ -631,12 +645,11 @@ wflagcheck() {
int main(void){return 0;}
EOF
$cc $cflags -w -o conftest.o -c conftest.c > /dev/null 2>&1
- grep ':' conftest.err > /dev/null 2>&1
if [ $? -eq 0 ] ; then
- rm -f conftest conftest.err conftest.o conftest.c
+ rm -f conftest conftest.o conftest.c
return 1
else
- rm -f conftest conftest.err conftest.o conftest.c
+ rm -f conftest conftest.o conftest.c
return 0
fi
}
@@ -852,9 +865,20 @@ else
echo "yes"
fi
+if [ "x$cflags" = "x-DEMACS -DVI" ] ; then
+ printf "checking if the compiler understands -g -O2... "
+ defaultcflagscheck
+ if [ $? -eq 0 ] ; then
+ echo "no"
+ else
+ cflags="-g -O2 $cflags"
+ echo "yes"
+ fi
+fi
+
printf "checking for -w compiler flag... "
wflagcheck
-if [ $? -ne 0 ] ; then
+if [ $? -eq 0 ] ; then
echo "no"
else
cflags="$cflags -w"
