This recent change to fnmatch.c breaks the build on z/OS:
DEPDIR=.deps depmode=aix /bin/sh /u/darkstar/testdir/build-aux/depcomp \
xlc-wrap -DHAVE_CONFIG_H -I. -I/u/darkstar/testdir/gllib -I..
-DGNULIB_STRICT_CHECKING=1 -D_XOPEN_SOURCE=600 -DNSIG=39 -qhaltonmsg=CCN3296
-g -qfloat=ieee -qlanglvl=extc99 -c -o fnmatch.o
/u/darkstar/testdir/gllib/fnmatch.c
ERROR CCN3046 /usr/include/builtins.h:1858 Syntax error.
CCN0793(I) Compilation failed for file /u/darkstar/testdir/gllib/fnmatch.c.
Object file not created.
make[4]: *** [fnmatch.o] Error 12
As far as I can tell, __builtin_expect() is not a preprocessor symbol on
this platform: