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Previously, AC_CHECK_FUNCS_ONCE collected a list of function names to check, but ran the checks using the AC_LANG that was active during the first encounter of the macro. In practice, this is usually the C language, and we haven't had actual reports of projects attempting to use AC_CHECK_FUNCS_ONCE across multiple languages, rather this was discovered by code inspection. With this patch, the code now tracks a separate per-language list of names to check. Note, however, that it is only possible to check for a given function name in one language; attempting to add a name again under AC_CHECK_FUNCS_ONCE while a different language is active is a no-op (this still makes sense because the side-effect of defining the CPP macro HAVE_FUNC does not include a language prefix). * lib/autoconf/functions.m4 (_AC_CHECK_FUNC_ONCE) (_AC_FUNCS_EXPANSION): * NEWS: Mention it. Signed-off-by: Eric Blake <eblake@redhat.com> |
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| lib | ||
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| man | ||
| tests | ||
| .gitattributes | ||
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| .prev-version | ||
| .x-update-copyright | ||
| AUTHORS | ||
| BUGS | ||
| cfg.mk | ||
| ChangeLog.0 | ||
| ChangeLog.1 | ||
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| ChangeLog.3 | ||
| configure.ac | ||
| COPYING | ||
| COPYING.EXCEPTION | ||
| COPYINGv3 | ||
| GNUmakefile | ||
| HACKING | ||
| maint.mk | ||
| Makefile.am | ||
| NEWS | ||
| README | ||
| README-alpha | ||
| README-hacking | ||
| THANKS | ||
| TODO | ||
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