Michael Haubenwallner <[email protected]> added the comment:
Sébastien, while this gives expected results on the AIX box here, it still has
one subtle problem:
AC_TRY_LINK may fail due to missing declaration in <sys/file.h> _or_ due to
missing implementation in libc.
The subsequent AC_CHECK_LIB won't fail when the implementation is in libbsd but
the declaration is missing - this is the case on not-so-recent AIX5.3 (and the
reason python worked there before).
Another minor nit is configure's output when libbsd is needed:
> checking for flock... checking for flock in -lbsd... yes
> yes
Anyway - I've hacked up another variant (with recent autoconf manual at hand),
which really should cover all known situations now (additionally using
cache-checks):
AC_CACHE_CHECK([for flock declaration], [ac_cv_flock_decl],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <sys/file.h>],
[void* p = flock]
)],
[ac_cv_flock_decl=yes],
[ac_cv_flock_decl=no]
)
])
if test "x${ac_cv_flock_decl}" = xyes; then
AC_CHECK_FUNCS(flock,,
AC_CHECK_LIB(bsd,flock,
[AC_DEFINE(HAVE_FLOCK)
AC_DEFINE(FLOCK_NEEDS_LIBBSD, 1, Define if flock needs to be linked with
bsd library.)
])
)
fi
Thank you anyway!
----------
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<http://bugs.python.org/issue4026>
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