On 03/10/2015 08:23 AM, Stefan Hajnoczi wrote:
gcc 4.9.2 treats -nopie as an error:
cc: error: unrecognized command line option ‘-nopie’
clang 3.5.0 treats -nopie as a warning:
clang: warning: argument unused during compilation: '-nopie'
The causes ./configure to fail with clang:
ERROR: configure test passed without -Werror but failed with -Werror.
Make the -nopie test use -Werror so that compile_prog works for both gcc
and clang.
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
configure | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure b/configure
index 7ba4bcb..4f9f689 100755
--- a/configure
+++ b/configure
@@ -1589,7 +1589,7 @@ EOF
fi
fi
- if compile_prog "-fno-pie" "-nopie"; then
+ if compile_prog "-Werror -fno-pie" "-nopie"; then
CFLAGS_NOPIE="-fno-pie"
LDFLAGS_NOPIE="-nopie"
fi
Oh, clang doesn't support -nopie but doesn't fail, so we have to force
it to in order to get proper configuration.
Makes sense.
Reviewed-by: John Snow <js...@redhat.com>
