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Use a non-empty test program to test ability to link.

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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  <sandra@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.
This commit is contained in:
Sandra Loosemore 2020-02-12 12:20:15 -08:00
parent 3f3932a0ec
commit 02ce382cd3
18 changed files with 81 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
config/ChangeLog
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@ -1,3 +1,11 @@
2020-02-12 Sandra Loosemore <sandra@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.burgess@embecosm.com> 2020-02-01 Andrew Burgess <andrew.burgess@embecosm.com>
* lib-link.m4 (AC_LIB_LINKFLAGS_BODY): Update shell syntax. * lib-link.m4 (AC_LIB_LINKFLAGS_BODY): Update shell syntax.

4
config/no-executables.m4
View File

@ -25,7 +25,9 @@ AC_BEFORE([$0], [_AC_COMPILER_EXEEXT])
AC_BEFORE([$0], [AC_LINK_IFELSE]) AC_BEFORE([$0], [AC_LINK_IFELSE])
m4_define([_AC_COMPILER_EXEEXT], m4_define([_AC_COMPILER_EXEEXT],
[AC_LANG_CONFTEST([AC_LANG_PROGRAM()]) [AC_LANG_CONFTEST([AC_LANG_PROGRAM(
[#include <stdio.h>],
[printf ("hello world\n");])])
# FIXME: Cleanup? # FIXME: Cleanup?
AS_IF([AC_TRY_EVAL(ac_link)], [gcc_no_link=no], [gcc_no_link=yes]) AS_IF([AC_TRY_EVAL(ac_link)], [gcc_no_link=no], [gcc_no_link=yes])
if test x$gcc_no_link = xyes; then if test x$gcc_no_link = xyes; then

7
libgcc/ChangeLog
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@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-02-10 Jeff Law <law@redhat.com> 2020-02-10 Jeff Law <law@redhat.com>
* config/frv/frvbegin.c: Use right flags for .ctors and .dtors * config/frv/frvbegin.c: Use right flags for .ctors and .dtors

4
libgcc/configure vendored
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@ -3553,11 +3553,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */ /* end confdefs.h. */
#include <stdio.h>
int int
main () main ()
{ {
printf ("hello world\n");
; ;
return 0; return 0;
} }

7
libgfortran/ChangeLog
View File

@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-01-24 Maciej W. Rozycki <macro@wdc.com> 2020-01-24 Maciej W. Rozycki <macro@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='. * configure.ac: Handle `--with-toolexeclibdir='.

4
libgfortran/configure vendored
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@ -4042,11 +4042,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */ /* end confdefs.h. */
#include <stdio.h>
int int
main () main ()
{ {
printf ("hello world\n");
; ;
return 0; return 0;
} }

7
libiberty/ChangeLog
View File

@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-02-05 Andrew Burgess <andrew.burgess@embecosm.com> 2020-02-05 Andrew Burgess <andrew.burgess@embecosm.com>
* hashtab.c (htab_remove_elt): Make a parameter const. * hashtab.c (htab_remove_elt): Make a parameter const.

4
libiberty/configure vendored
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@ -3310,11 +3310,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */ /* end confdefs.h. */
#include <stdio.h>
int int
main () main ()
{ {
printf ("hello world\n");
; ;
return 0; return 0;
} }

7
libitm/ChangeLog
View File

@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-01-24 Maciej W. Rozycki <macro@wdc.com> 2020-01-24 Maciej W. Rozycki <macro@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='. * configure.ac: Handle `--with-toolexeclibdir='.

0
libitm/configure vendored Normal file → Executable file
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7
libobjc/ChangeLog
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@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-01-24 Maciej W. Rozycki <macro@wdc.com> 2020-01-24 Maciej W. Rozycki <macro@wdc.com>
* Makefile.in (aclocal_deps): Add `toolexeclibdir.m4'. * Makefile.in (aclocal_deps): Add `toolexeclibdir.m4'.

4
libobjc/configure vendored
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@ -2917,11 +2917,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */ /* end confdefs.h. */
#include <stdio.h>
int int
main () main ()
{ {
printf ("hello world\n");
; ;
return 0; return 0;
} }

7
libquadmath/ChangeLog
View File

@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-01-24 Maciej W. Rozycki <macro@wdc.com> 2020-01-24 Maciej W. Rozycki <macro@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='. * configure.ac: Handle `--with-toolexeclibdir='.

4
libquadmath/configure vendored
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@ -3461,11 +3461,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */ /* end confdefs.h. */
#include <stdio.h>
int int
main () main ()
{ {
printf ("hello world\n");
; ;
return 0; return 0;
} }

7
libssp/ChangeLog
View File

@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-01-24 Maciej W. Rozycki <macro@wdc.com> 2020-01-24 Maciej W. Rozycki <macro@wdc.com>
* configure.ac: Handle `--with-toolexeclibdir='. * configure.ac: Handle `--with-toolexeclibdir='.

4
libssp/configure vendored
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@ -3402,11 +3402,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */ /* end confdefs.h. */
#include <stdio.h>
int int
main () main ()
{ {
printf ("hello world\n");
; ;
return 0; return 0;
} }

7
libstdc++-v3/ChangeLog
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@ -1,3 +1,10 @@
2020-02-12 Sandra Loosemore <sandra@codesourcery.com>
PR libstdc++/79193
PR libstdc++/88999
* configure: Regenerated.
2020-02-12 François Dumont <fdumont@gcc.gnu.org> 2020-02-12 François Dumont <fdumont@gcc.gnu.org>
* include/bits/hashtable.h * include/bits/hashtable.h

4
libstdc++-v3/configure vendored
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@ -4130,11 +4130,11 @@ done
cat confdefs.h - <<_ACEOF >conftest.$ac_ext cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */ /* end confdefs.h. */
#include <stdio.h>
int int
main () main ()
{ {
printf ("hello world\n");
; ;
return 0; return 0;
} }