[ChangeLog] * modules/mkstemp (Depends-on): Add extensions, so that mkstemp is visible on some platforms. (Makefile.am): Add mkstemp.h to EXTRA_DIST. [lib/ChangeLog] * mkstemp.h: New file, since some standard headers #define mkstemp. * mkstemp.c: Revamp to put the !_LIBC code together. Include "mkstemp.h". Make the _LIBC code resemble glibc original more, e.g., use K&R style. * stdlib--.h: Include mkstemp.h. [m4/ChangeLog] * mkstemp.m4 (gl_FUNC_MKSTEMP): Require AC_SYS_LARGEFILE. Check that large offsets work. Modernize Autoconf usages. Prefer "yes" to mean a good thing rather than a bad. Don't put "#define mkstemp" in config.h, as this might interfere with standard system headers that "#define mkstemp mkstemp64".