https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112534
--- Comment #4 from Arsen Arsenović <arsen at gcc dot gnu.org> --- (In reply to Bruno Haible from comment #2) > > gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) > > gcc -std=gnu99 ... > > error: unknown type name 'max_align_t' > > The type 'max_align_t' exists in C11, but not in C99, as can be seen from > these uses of gcc 4.8.5: > $ cat foo.c > #include <stddef.h> > max_align_t x; > $ gcc -std=c11 -c foo.c > $ gcc -std=gnu11 -c foo.c > $ gcc -std=c99 -c foo.c > foo.c:2:1: error: unknown type name ‘max_align_t’ > max_align_t x; > ^ > $ gcc -std=gnu99 -c foo.c > foo.c:2:1: error: unknown type name ‘max_align_t’ > max_align_t x; > ^ > > But this occurs in the build tree of gettext-runtime, and this package uses > AC_PROG_CC, which adds option -std=gnu11 if supported (this is in GNU > Autoconf since version 2.70). > > Maybe some configure file was built with Autoconf 2.69 and older and thus > does not add -std=gnu11 ? The toolchain tree is generated with AC2.69, indeed. The gettext-runtime files should be unaltered from the release gettext tarball, though. > Or some other configure in the build tree has determined CC="gcc > -std=gnu99", and this setting has been propagated into gettext-runtime, > overriding the findings from gettext-runtime/configure ?
