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build: stop clang complaining about redefined typedefs

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Clang's gnu99 mode is not quite the same as GCC's. It will complain
about redefined typedefs being a C11 feature, while GCC does not
complain and allows them in gnu99 mode.

Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-10-08 15:37:11 +01:00
parent 897d8b34c8
commit 412cc0f403
1 changed files with 4 additions and 0 deletions
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m4/virt-compile-warnings.m4
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@ -125,6 +125,10 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
# We do "bad" function casts all the time for event callbacks
wantwarn="$wantwarn -Wno-cast-function-type"
# CLang incorrectly complains about dup typedefs win gnu99 mode
# so use this CLang-specific arg to keep it quiet
wantwarn="$wantwarn -Wno-typedef-redefinition"
# GNULIB expects this to be part of -Wc++-compat, but we turn
# that one off, so we need to manually enable this again
wantwarn="$wantwarn -Wjump-misses-init"