Hello,
On Fri, Jul 01, 2005 at 10:14:28AM +0200, Harald Dunkel wrote:
> It seems that AC_PROG_CC_C_O does not work with Microsoft's
> Visual C++ 13.10.3077.
[...]
> cl -c -o somedir/conftest.obj conftest.c
> or
> cl -c -o xyz.obj conftest.c
>
> do not work as expected. cl silently ignores the -o
> option if there is a -c.
the patch attached to this mail (relative to current autoconf CVS)
should fix it.
OK to commit?
> How can I tell autoconf to not use -c and -o together,
> regardless what the test said?
Do I guess correctly that you in fact use AM_PROG_CC_C?
Then the following hack should work:
AC_PROG_CC_C_O
eval ac_cv_prog_cc_${ac_cc}_c_o=no
AM_PROG_CC_C_O
(The configure output still says that -c -o works, and NO_MINUS_C_MINUS_O
is not defined in your config.h, but it doesn't matter.)
Have a nice day,
Stepan
2005-07-01 Stepan Kasal <kasal@xxxxxx>
* 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
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