2005-07-01  Stepan Kasal  <address@hidden>

	* lib/autoconf/c.m4 (AC_PROG_CC_C_O): Use conf$$.o instead of
	conftest.o, to see whether the compiler really obeys; rm the
	object file before the test.
	* lib/autoconf/fortran.m4 (_AC_PROG_FC_C_O): Likewise.

Index: lib/autoconf/c.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/c.m4,v
retrieving revision 1.201
diff -u -r1.201 c.m4
--- lib/autoconf/c.m4	24 May 2005 07:29:57 -0000	1.201
+++ lib/autoconf/c.m4	1 Jul 2005 10:43:07 -0000
@@ -585,17 +585,19 @@
 # Make sure it works both with $CC and with simple cc.
 # We do the test twice because some compilers refuse to overwrite an
 # existing .o file with -o, though they will create one.
-ac_try='$CC -c conftest.$ac_ext -o conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
+ac_try='$CC -c conftest.$ac_ext -o conf$[$].$ac_objext >&AS_MESSAGE_LOG_FD'
+rm -f conf$[$]*
 if AC_TRY_EVAL(ac_try) &&
-   test -f conftest.$ac_objext && AC_TRY_EVAL(ac_try);
+   test -f conf$[$].$ac_objext && AC_TRY_EVAL(ac_try);
 then
   eval ac_cv_prog_cc_${ac_cc}_c_o=yes
   if test "x$CC" != xcc; then
     # Test first that cc exists at all.
     if AC_TRY_COMMAND(cc -c conftest.$ac_ext >&AS_MESSAGE_LOG_FD); then
-      ac_try='cc -c conftest.$ac_ext -o conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
+      ac_try='cc -c conftest.$ac_ext -o conf$[$].$ac_objext >&AS_MESSAGE_LOG_FD'
+      rm -f conf$[$]*
       if AC_TRY_EVAL(ac_try) &&
-	 test -f conftest.$ac_objext && AC_TRY_EVAL(ac_try);
+	 test -f conf$[$].$ac_objext && AC_TRY_EVAL(ac_try);
       then
 	# cc works too.
 	:
@@ -608,7 +610,7 @@
 else
   eval ac_cv_prog_cc_${ac_cc}_c_o=no
 fi
-rm -f conftest*
+rm -f conftest* conf$[$]*
 ])dnl
 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = yes"; then
   AC_MSG_RESULT([yes])
Index: lib/autoconf/fortran.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/fortran.m4,v
retrieving revision 1.194
diff -u -r1.194 fortran.m4
--- lib/autoconf/fortran.m4	30 Jun 2005 12:59:15 -0000	1.194
+++ lib/autoconf/fortran.m4	1 Jul 2005 10:43:07 -0000
@@ -461,15 +461,16 @@
 [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
 # We test twice because some compilers refuse to overwrite an existing
 # `.o' file with `-o', although they will create one.
-ac_try='$[]_AC_FC[] $[]_AC_LANG_PREFIX[]FLAGS -c conftest.$ac_ext -o conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
+ac_try='$[]_AC_FC[] $[]_AC_LANG_PREFIX[]FLAGS -c conftest.$ac_ext -o conf$[$].$ac_objext >&AS_MESSAGE_LOG_FD'
+rm -f conf$[$]*
 if AC_TRY_EVAL(ac_try) &&
-     test -f conftest.$ac_objext &&
+     test -f conf$[$].$ac_objext &&
      AC_TRY_EVAL(ac_try); then
   ac_cv_prog_[]_AC_LANG_ABBREV[]_c_o=yes
 else
   ac_cv_prog_[]_AC_LANG_ABBREV[]_c_o=no
 fi
-rm -f conftest*])
+rm -f conftest* conf$[$]*])
 if test $ac_cv_prog_[]_AC_LANG_ABBREV[]_c_o = no; then
   AC_DEFINE([]_AC_FC[]_NO_MINUS_C_MINUS_O, 1,
             [Define to 1 if your Fortran compiler doesn't accept