On 2/10/20 3:58 PM, Joseph Myers wrote:
On Sat, 8 Feb 2020, Sandra Loosemore wrote:
BTW, I did run autoconf in every subdirectory that contains a
configure.ac,
but it appears only libstc++-v3 actually uses this test; all the other
regenerated configure scripts were unchanged.
There's some problem with that regeneration, then; every directory where
configure.ac mentions GCC_NO_EXECUTABLES should have a resulting change (I
tested regenerating in libgcc/ with this patch applied and got such a
change, for example).
Hmmm. I just tried that again and got nothing. Do I have to do something
other than just run "autoconf" in that directory? I'm always confused by
anything involving configuration changes. :-(
Just running autoconf in that directory should suffice to get configure
regenerated with the change.
Hmmm, I tried again and saw that autoconf didn't even touch the
timestamp on the existing configure file, but I was able to force it to
regenerate the files by removing the old ones first. Is this version of
the patch OK to check in?
-Sandra
>From c258184d7945071450856e8563128417993758a9 Mon Sep 17 00:00:00 2001
From: Sandra Loosemore <san...@codesourcery.com>
Date: Wed, 12 Feb 2020 12:20:15 -0800
Subject: [PATCH v2] Use a non-empty test program to test ability to link.
On bare-metal targets, I/O support is typically provided by a BSP and
requires a linker script and/or hosting library to be specified on the
linker command line. Linking an empty program with the default linker
script may succeed, however, which confuses libstdc++ configuration
when programs that probe for the presence of various I/O features fail
with link errors.
2020-02-12 Sandra Loosemore <san...@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
config/
* no-executables.m4: Use a non-empty program to test for linker
support.
libgcc/
* configure: Regenerated.
libgfortran/
* configure: Regenerated.
libiberty/
* configure: Regenerated.
libitm/
* configure: Regenerated.
libobjc/
* configure: Regenerated.
libquadmath/
* configure: Regenerated.
libssp/
* configure: Regenerated.
libstdc++v-3/
* configure: Regenerated.
---
config/ChangeLog | 8 ++++++++
config/no-executables.m4 | 4 +++-
libgcc/ChangeLog | 7 +++++++
libgcc/configure | 4 ++--
libgfortran/ChangeLog | 7 +++++++
libgfortran/configure | 4 ++--
libiberty/ChangeLog | 7 +++++++
libiberty/configure | 4 ++--
libitm/ChangeLog | 7 +++++++
libitm/configure | 0
libobjc/ChangeLog | 7 +++++++
libobjc/configure | 4 ++--
libquadmath/ChangeLog | 7 +++++++
libquadmath/configure | 4 ++--
libssp/ChangeLog | 7 +++++++
libssp/configure | 4 ++--
libstdc++-v3/ChangeLog | 7 +++++++
libstdc++-v3/configure | 4 ++--
18 files changed, 81 insertions(+), 15 deletions(-)
mode change 100644 => 100755 libitm/configure
diff --git a/config/ChangeLog b/config/ChangeLog
index f1fec81..01428dd 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,11 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * no-executables.m4: Use a non-empty program to test for linker
+ support.
+
2020-02-01 Andrew Burgess <andrew.burg...@embecosm.com>
* lib-link.m4 (AC_LIB_LINKFLAGS_BODY): Update shell syntax.
diff --git a/config/no-executables.m4 b/config/no-executables.m4
index 9061624..6842f84 100644
--- a/config/no-executables.m4
+++ b/config/no-executables.m4
@@ -25,7 +25,9 @@ AC_BEFORE([$0], [_AC_COMPILER_EXEEXT])
AC_BEFORE([$0], [AC_LINK_IFELSE])
m4_define([_AC_COMPILER_EXEEXT],
-[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+[AC_LANG_CONFTEST([AC_LANG_PROGRAM(
+ [#include <stdio.h>],
+ [printf ("hello world\n");])])
# FIXME: Cleanup?
AS_IF([AC_TRY_EVAL(ac_link)], [gcc_no_link=no], [gcc_no_link=yes])
if test x$gcc_no_link = xyes; then
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 917d0e7..7b46ccb 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-02-10 Jeff Law <l...@redhat.com>
* config/frv/frvbegin.c: Use right flags for .ctors and .dtors
diff --git a/libgcc/configure b/libgcc/configure
index ab8d471..093036a 100755
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -3553,11 +3553,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include <stdio.h>
int
main ()
{
-
+printf ("hello world\n");
;
return 0;
}
diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index fe7e480..5632fbc 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-01-24 Maciej W. Rozycki <ma...@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='.
diff --git a/libgfortran/configure b/libgfortran/configure
index 8ba6831..d01654e 100755
--- a/libgfortran/configure
+++ b/libgfortran/configure
@@ -4042,11 +4042,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include <stdio.h>
int
main ()
{
-
+printf ("hello world\n");
;
return 0;
}
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index b3ec231..84225ad 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-02-05 Andrew Burgess <andrew.burg...@embecosm.com>
* hashtab.c (htab_remove_elt): Make a parameter const.
diff --git a/libiberty/configure b/libiberty/configure
index 7a34dab..d2413f1 100755
--- a/libiberty/configure
+++ b/libiberty/configure
@@ -3310,11 +3310,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include <stdio.h>
int
main ()
{
-
+printf ("hello world\n");
;
return 0;
}
diff --git a/libitm/ChangeLog b/libitm/ChangeLog
index feccd16..9c70974 100644
--- a/libitm/ChangeLog
+++ b/libitm/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-01-24 Maciej W. Rozycki <ma...@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='.
diff --git a/libitm/configure b/libitm/configure
old mode 100644
new mode 100755
diff --git a/libobjc/ChangeLog b/libobjc/ChangeLog
index db7fce7..b5bba60 100644
--- a/libobjc/ChangeLog
+++ b/libobjc/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-01-24 Maciej W. Rozycki <ma...@wdc.com>
* Makefile.in (aclocal_deps): Add `toolexeclibdir.m4'.
diff --git a/libobjc/configure b/libobjc/configure
index 46124b2..2f8924e 100755
--- a/libobjc/configure
+++ b/libobjc/configure
@@ -2917,11 +2917,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include <stdio.h>
int
main ()
{
-
+printf ("hello world\n");
;
return 0;
}
diff --git a/libquadmath/ChangeLog b/libquadmath/ChangeLog
index 0b1db14..2df546a 100644
--- a/libquadmath/ChangeLog
+++ b/libquadmath/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-01-24 Maciej W. Rozycki <ma...@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='.
diff --git a/libquadmath/configure b/libquadmath/configure
index 339e809..7b45eb7 100755
--- a/libquadmath/configure
+++ b/libquadmath/configure
@@ -3461,11 +3461,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include <stdio.h>
int
main ()
{
-
+printf ("hello world\n");
;
return 0;
}
diff --git a/libssp/ChangeLog b/libssp/ChangeLog
index f1ccde4..9e3e6a6 100644
--- a/libssp/ChangeLog
+++ b/libssp/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-01-24 Maciej W. Rozycki <ma...@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='.
diff --git a/libssp/configure b/libssp/configure
index 5541cf9..dd3b41d 100755
--- a/libssp/configure
+++ b/libssp/configure
@@ -3402,11 +3402,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include <stdio.h>
int
main ()
{
-
+printf ("hello world\n");
;
return 0;
}
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index d3c704a..91836c9 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2020-02-12 Sandra Loosemore <san...@codesourcery.com>
+
+ PR libstdc++/79193
+ PR libstdc++/88999
+
+ * configure: Regenerated.
+
2020-02-09 Jonathan Wakely <jwak...@redhat.com>
* testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index a39c33b..9f9c5a2 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -4130,11 +4130,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include <stdio.h>
int
main ()
{
-
+printf ("hello world\n");
;
return 0;
}
--
2.8.1
