[PATCH] symlinkat: port to AIX 7.1

* doc/posix-functions/symlinkat.texi (symlinkat): Mention AIX porting problem. * lib/symlinkat.c: Always include errno.h. (rpl_symlinkat) [HAVE_SYMLINKAT]: New function. * lib/unistd.in.h (symlinkat): Add replacement machinery. * m4/symlinkat.m4 (gl_FUNC_SYMLINKAT): Check symlinkat behavior. * m4/u

[PATCH] readlinkat: port to AIX 7.1

* doc/posix-functions/readlink.texi (readlink): * doc/posix-functions/readlinkat.texi (readlinkat): Mention AIX porting problem. * lib/readlinkat.c (rpl_readlinkat) [HAVE_READLINKAT]: New function. * lib/unistd.in.h (readlinkat): Add replacement machinery. * m4/readlinkat.m4 (gl_FUNC_READLINKAT): C

bootstrap check_exists() causes misleading diagnostics on OpenBSD

Hi, this is maybe not a full-grown bug, more like a quirk, but is is sure bound to cause confusion, so i'd like to hear what you think... I'm the maintainer of the OpenBSD port of groff (GNU troff), and Bertrand (see Cc:) is currently migrating the groff build system to automake and gnulib. He u