build: reduce warnings from older gcc

Older gcc warns (on every file!) that -Wabi and -Wdeprecated only
make sense on C++ projects.  Newer gcc accepts these warnings for
C, but it is not clear that they can do anything useful, so it
is easier to just drop the warnings altogether.

* m4/virt-compile-warnings.m4 (LIBVIRT_COMPILE_WARNINGS): Silence
-Wabi and -Wdeprecated on older gcc.
Reported by Peter Krempa.

diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4
index a17e4b764e66b9190cfd772a9e38cad97343107c..ba388aad117e42d608310fca368d3fc6a026774e 100644 (file)
--- a/m4/virt-compile-warnings.m4
+++ b/m4/virt-compile-warnings.m4
@@ -22,6 +22,8 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
 
         # Don't care about C++ compiler compat
         dontwarn="$dontwarn -Wc++-compat"
+        dontwarn="$dontwarn -Wabi"
+        dontwarn="$dontwarn -Wdeprecated"
         # Don't care about ancient C standard compat
         dontwarn="$dontwarn -Wtraditional"
         # Don't care about ancient C standard compat