Bruno, okay to apply in response to your bug report? http://lists.gnu.org/archive/html/bug-autoconf/2008-12/msg00039.html
I've tested that before this patch, gnulib-tool --create-testdir --dir=... vasnprintf-posix references $APPLE_UNIVERSAL_BUILD prior to its definition, and after the patch, the same testcase did things in a correct order. Note my emphasis on _a_ correct order, not _the_ correct order; with autoconf 2.63 and earlier, this patch has the result of exploiting the autoconf bug in order to hoist the expansion of gl_MULTIARCH_BODY to occur prior to gl_INIT, in such a manner that the overall dependencies are still met. But with autoconf 2.64, the patch I am working on there will no longer have an AC_REQUIRE bug, and therefore gl_MULTIARCH_BODY will be expanded in place after the start of gl_INIT. But in both cases, all require relationships are honored; or put another way, since there is no AC_REQUIRE relationship between gl_MULTIARCH_BODY and the beginning text of gl_INIT, either piece can occur first and the resulting configure file will still be correct (or if there is an ordering relationship, we need to add an AC_REQUIRE to make it explicit). From: Eric Blake <e...@byu.net> Date: Mon, 29 Dec 2008 15:41:49 -0700 Subject: [PATCH] multiarch: avoid autoconf AC_REQUIRE bug * m4/multiarch.m4 (gl_MULTIARCH): Split body... (gl_MULTIARCH_BODY): ...into new macro, to work around bug in Autoconf 2.63 and older. Reported by Bruno Haible, and analyzed in http://lists.gnu.org/archive/html/bug-autoconf/2008-12/msg00039.html Signed-off-by: Eric Blake <e...@byu.net> --- ChangeLog | 9 +++++++++ m4/multiarch.m4 | 5 +++++ 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/ChangeLog b/ChangeLog index 8bd92e7..0d9eb4b 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,14 @@ 2008-12-29 Eric Blake <e...@byu.net> + multiarch: avoid autoconf AC_REQUIRE bug + * m4/multiarch.m4 (gl_MULTIARCH): Split body... + (gl_MULTIARCH_BODY): ...into new macro, to work around bug in Autoconf + 2.63 and older. + Reported by Bruno Haible, and analyzed in + http://lists.gnu.org/archive/html/bug-autoconf/2008-12/msg00039.html + +2008-12-29 Eric Blake <e...@byu.net> + wchar.h: supply WEOF on Irix 5.3 * lib/wchar.in.h (wint_t): Also supply WEOF. * lib/wctype.in.h (wint_t): Likewise. diff --git a/m4/multiarch.m4 b/m4/multiarch.m4 index d857599..8e312f6 100644 --- a/m4/multiarch.m4 +++ b/m4/multiarch.m4 @@ -21,6 +21,11 @@ dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_MULTIARCH], [ + AC_REQUIRE([gl_MULTIARCH_BODY]) +]) + +AC_DEFUN([gl_MULTIARCH_BODY], +[ dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN. gl_cv_c_multiarch=no AC_COMPILE_IFELSE( -- 1.6.0.4
