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authorEric Blake <eblake@redhat.com>2012-09-07 11:42:10 -0600
committerEric Blake <eblake@redhat.com>2012-09-07 14:15:22 -0600
commit892242519acceec2b43d9b534acb468a99330cf4 (patch)
tree4fe77c7eecda30da3f529487d3457c54c024c69a /m4
parentFix RPM spec conditional when %{rhel} is not defined (diff)
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build: fix build on older gcc
On RHEL 6.2, gcc 4.4.6 complains: cc1: warning: command line option "-Wenum-compare" is valid for C++/ObjC++ but not for C which in turn breaks a -Werror build. Meanwhile, in Fedora 17, gcc 4.7.0, -Wenum-compare has been enhanced to also work on C, but at the same time, it is documented that -Wall now implicitly includes -Wenum-compare. Therefore, it is sufficient to remove explicit checks for this option, avoiding the warning from older gcc while still getting the compile-time safety from newer gcc. * m4/virt-compile-warnings.m4 (-Wenum-compare): Omit explicit check.
Diffstat (limited to 'm4')
-rw-r--r--m4/virt-compile-warnings.m42
1 files changed, 2 insertions, 0 deletions
diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4
index c3ff9622e..d1173eb07 100644
--- a/m4/virt-compile-warnings.m4
+++ b/m4/virt-compile-warnings.m4
@@ -57,6 +57,8 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
dontwarn="$dontwarn -Wformat-nonliteral"
# Gnulib's stat-time.h violates this
dontwarn="$dontwarn -Waggregate-return"
+ # gcc 4.4.6 complains this is C++ only; gcc 4.7.0 implies this from -Wall
+ dontwarn="$dontwarn -Wenum-compare"
# Gnulib uses '#pragma GCC diagnostic push' to silence some
# warnings, but older gcc doesn't support this.