https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86450
--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Tue, Jul 10, 2018 at 06:46:33PM +0000, sgk at troutmask dot apl.washington.edu wrote: > > % find . -type f | xargs grep Wabi > ... > ./libstdc++-v3/acinclude.m4: WARN_FLAGS='-Wall -Wextra -Wwrite-strings > -Wcast-qual -Wabi' > This fixes the bootstrap failure Index: libstdc++-v3/acinclude.m4 =================================================================== --- libstdc++-v3/acinclude.m4 (revision 262541) +++ libstdc++-v3/acinclude.m4 (working copy) @@ -733,7 +733,7 @@ AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ # 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 262541) +++ libstdc++-v3/configure (working copy) @@ -81846,7 +81846,7 @@ $as_echo "$gxx_include_dir" >&6; } # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc - WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi' + WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'