configure.ac: Move guarded checks for CC and CXX ...

libstdc++-v3/
	* configure.ac: Move guarded checks for CC and CXX ...
	* acinclude.m4 (GLIBCXX_CONFIGURE): ... from here.
	* configure: Regenerate.

From-SVN: r150788

libstdc++-v3/ChangeLog

+2009-08-15  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	* configure.ac: Move guarded checks for CC and CXX ...
+	* acinclude.m4 (GLIBCXX_CONFIGURE): ... from here.
+	* configure: Regenerate.
+
 2009-08-14  Edward Smith-Rowland  <3dw4rd@verizon.net>
 	    Paolo Carlini  <paolo.carlini@oracle.com>
 

libstdc++-v3/acinclude.m4

@@ -79,35 +79,6 @@ AC_DEFUN([GLIBCXX_CONFIGURE], [
     AC_HELP_STRING([--with-newlib],
                    [assume newlib as a system C library]))
 
-  # We're almost certainly being configured before anything else which uses
-  # C++, so all of our AC_PROG_* discoveries will be cached.  It's vital that
-  # we not cache the value of CXX that we "discover" here, because it's set
-  # to something unique for us and libjava.  Other target libraries need to
-  # find CXX for themselves.  We yank the rug out from under the normal AC_*
-  # process by sneakily renaming the cache variable.  This also lets us debug
-  # the value of "our" CXX in postmortems.
-  #
-  # We must also force CXX to /not/ be a precious variable, otherwise the
-  # wrong (non-multilib-adjusted) value will be used in multilibs.  This
-  # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS.  And as a side
-  # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
-  # that ourselves.  Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
-  #
-  # -fno-builtin must be present here so that a non-conflicting form of
-  # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
-
-  m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
-  m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
-  m4_define([_AC_ARG_VAR_PRECIOUS],[])
-  save_CXXFLAGS="$CXXFLAGS"
-  CXXFLAGS="$CXXFLAGS -fno-builtin"
-  AC_PROG_CC
-  AC_PROG_CXX
-  CXXFLAGS="$save_CXXFLAGS"
-  m4_rename_force([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
-  AC_SUBST(CFLAGS)
-  AC_SUBST(CXXFLAGS)
-
   # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
   # available).  Uncomment the next line to force a particular method.
   AC_PROG_LN_S

libstdc++-v3/configure.ac

@@ -78,7 +78,36 @@ AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability
 AH_TEMPLATE(PACKAGE, [Name of package])
 AH_TEMPLATE(VERSION, [Version number of package])
 
-# Runs configure.host, finds CC, CXX, and assorted other critical bits.  Sets
+# We're almost certainly being configured before anything else which uses
+# C++, so all of our AC_PROG_* discoveries will be cached.  It's vital that
+# we not cache the value of CXX that we "discover" here, because it's set
+# to something unique for us and libjava.  Other target libraries need to
+# find CXX for themselves.  We yank the rug out from under the normal AC_*
+# process by sneakily renaming the cache variable.  This also lets us debug
+# the value of "our" CXX in postmortems.
+#
+# We must also force CXX to /not/ be a precious variable, otherwise the
+# wrong (non-multilib-adjusted) value will be used in multilibs.  This
+# little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS.  And as a side
+# effect, CXXFLAGS is no longer automagically subst'd, so we have to do
+# that ourselves.  Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
+#
+# -fno-builtin must be present here so that a non-conflicting form of
+# std::exit can be guessed by AC_PROG_CXX, and used in later tests.
+
+m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
+m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
+m4_define([_AC_ARG_VAR_PRECIOUS],[])
+save_CXXFLAGS="$CXXFLAGS"
+CXXFLAGS="$CXXFLAGS -fno-builtin"
+AC_PROG_CC
+AC_PROG_CXX
+CXXFLAGS="$save_CXXFLAGS"
+m4_rename_force([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
+AC_SUBST(CFLAGS)
+AC_SUBST(CXXFLAGS)
+
+# Runs configure.host, and assorted other critical bits.  Sets
 # up critical shell variables.
 GLIBCXX_CONFIGURE