[libvirt] [PATCH] maint: show which compiler warning triggered

* acinclude.m4 (LIBVIRT_COMPILE_WARNINGS): Add -fdiagnostics-show-option. --- Here's an example of how things change, when using './configure --enable-compiler-warnings=error' and introducing something gcc would warn about: CC libvirt_driver_nwfilter_la-nwfilter_ebiptables_driver.lo cc1: warnings being treated as errors nwfilter/nwfilter_ebiptables_driver.c: In function '_iptablesCreateRuleInstance': nwfilter/nwfilter_ebiptables_driver.c:1059: error: unused variable 'oops' [-Wunused-variable] acinclude.m4 | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/acinclude.m4 b/acinclude.m4 index f00933f..7fa2d67 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -13,13 +13,17 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[ dnl ****************************** AC_ARG_ENABLE(compile-warnings, - AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@], - [Turn on compiler warnings]),, + [AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@], + [Turn on compiler warnings])],, [enable_compile_warnings="m4_default([$1],[maximum])"]) warnCFLAGS= - common_flags="-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fasynchronous-unwind-tables" + common_flags= + common_flags="$common_flags -Wp,-D_FORTIFY_SOURCE=2" + common_flags="$common_flags -fexceptions" + common_flags="$common_flags -fasynchronous-unwind-tables" + common_flags="$common_flags -fdiagnostics-show-option" case "$enable_compile_warnings" in no) -- 1.6.6.1