Hi, the -Wabi option prints a warning as follows:
cc1plus: warning: -Wabi won't warn about anything [-Wabi] cc1plus: note: -Wabi warns about differences from the most up-to-date ABI, which is also used by default cc1plus: note: use e.g. -Wabi=11 to warn about changes from GCC 7 This happens many times while building libstdc++, and as the warning explains, it is good for nothing, so this patch removes it. Bootstrapped and reg-tested on x86_64-pc-linux-gnu. Is it OK for trunk? Thanks Bernd.
2018-06-30 Bernd Edlinger <bernd.edlin...@hotmail.de> * acinclude.m4 (WARN_FLAGS): Remove -Wabi. * configure: Regenerated. Index: libstdc++-v3/acinclude.m4 =================================================================== --- libstdc++-v3/acinclude.m4 (revision 262271) +++ libstdc++-v3/acinclude.m4 (working copy) @@ -733,7 +733,7 @@ # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc AC_SUBST(OPTIMIZE_CXXFLAGS) - WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi' + WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual' AC_SUBST(WARN_FLAGS) ]) Index: libstdc++-v3/configure =================================================================== --- libstdc++-v3/configure (revision 262271) +++ libstdc++-v3/configure (working copy) @@ -81846,7 +81846,7 @@ # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc - WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi' + WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
