[configure.ac] Moved AM_PROG_AR (introduced in r8546) after the

CC and CFLAGS setup from gmp.h, because AM_PROG_AR makes Autoconf
select a compiler (before it may be chosen from __GMP_CC).

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@8611 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 10 insertions, 3 deletions

diff --git a/configure.ac b/configure.ac
index c69d83f2f..35af7c87f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,14 +46,14 @@ if test -n "$CFLAGS" || test -n "$CC" ; then
  user_redefine_cc=yes
 fi
 
+dnl Basic Autoconf macros. At this point, they must not make Autoconf
+dnl choose a compiler because of the CC and CFLAGS setup from gmp.h!
+
 AC_CANONICAL_HOST
 
 AC_PROG_EGREP
 AC_PROG_SED
 
-dnl Support unusual archivers.
-AM_PROG_AR
-
 dnl To use a separate config header.
 dnl There is still some problem with GMP's HAVE_CONFIG
 dnl AC_CONFIG_HEADERS([mpfrconf.h:mpfrconf.in])
@@ -179,6 +179,10 @@ dnl
 dnl ********************************************************************
 dnl Check for CC and CFLAGS in gmp.h
 
+dnl Warning! The following tests must be done before Autoconf selects
+dnl a compiler. This means that some macros such as AC_PROG_CC and
+dnl AM_PROG_AR must be put after the following code.
+
 if test -z "$user_redefine_cc" && test "$cross_compiling" != yes ; then
 
 dnl We need to guess the C preprocessor instead of using AC_PROG_CPP,
@@ -243,6 +247,9 @@ AC_PROG_CC
 AC_PROG_CPP
 AC_LANG(C)
 
+dnl Support unusual archivers.
+AM_PROG_AR
+
 dnl For GCC, _Decimal64 was introduced in GCC 4.3 for some targets
 dnl (note that it is not guaranteed to be available because it may
 dnl be disabled in the GCC build). See: