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m4: fix setting of warning flags 

When adding the -std=gnu99 flag, we set $wantwarn instead
of appending to it. This meant all the compiler warnings
were accidentally discarded.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-10-08 13:41:19 +01:00
parent 23605f58bf
commit 4d2b96655f
1 changed files with 1 additions and 1 deletions
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m4/virt-compile-warnings.m4
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@ -192,7 +192,7 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
# Request the gnu99 standard which is the best choice with
# gcc 4.8.0. Not a warning flag, but the probing mechanism
# is convenient
wantwarn="-std=gnu99"
wantwarn="$wantwarn -std=gnu99"
# Check for $CC support of each warning
for w in $wantwarn; do