* include/unistd.h: Use libc_hidden_proto for _exit, alarm, confstr,
execl, execle, execlp, execvp, getpid, getsid.
* sysdeps/generic/alarm.c: Add libc_hidden_def.
* sysdeps/unix/alarm.c: Likewise.
* posix/confstr.c: Likewise.
* posix/execvp.c: Likewise.
* posix/execlp.c: Likewise.
* posix/execle.c: Likewise.
* posix/execl.c: Likewise.
* sysdeps/generic/getsid.c: Likewise.
* sysdeps/mach/hurd/getsid.c: Likewise.
* sysdeps/generic/getpid.c: Add libc_hidden_weak.
* sysdeps/mach/hurd/getpid.c: Likewise.
* include/stdlib.h: Use libc_hidden_proto for ecvt_r, fcvt_r,
qecvt_r, qfcvt_r, lrand48_r.
* misc/efgcvt_r.c: Add libc_hidden_def.
* include/wordexp.h: Use libc_hidden_proto for wordfree.
* sysdeps/generic/wordexp.c: Add libc_hidden_def.
* include/langinfo.h: Use libc_hidden_proto for nl_langinfo.
* locale/nl_langinfo.c: Add libc_hidden_def.
* include/glob.h: Use libc_hidden_proto for glob, globfree, globfree64.
* sysdeps/generic/glob.c: Add libc_hidden_def.
* sysdeps/generic/glob64.c: Likewise.
* sysdeps/wordsize-64/glob.c (globfree64): Add libc_hidden_weak.
c41f555e0c