diff mbox

Avoid build failures from 'Link tests are not allowed after GCC_NO_EXECUTABLES'

Message ID 20120921165714.GA30101@obsidianresearch.com
State New
Headers show

Commit Message

Jason Gunthorpe Sept. 21, 2012, 4:57 p.m. UTC 
At some point the libstdc++ library configure script added a test for
cross compiling, if so it disables all configure time compiler-link
tests on the premise that the tool chain cannot link.

In the crosstool-ng case, with at least glibc/eglibc, the libstdc++
build is done at the very end after a full libc is installed and all
the start files are valid. The compiler can link, so take the test out
of the libstdc++ configure.

Two reasons
 1) The libstdc++ configure has a hackish work around path for the no link case,
    we don't want to use it unless *absolutely* necessary
 2) Some systems will hit this error:
     checking dynamic linker characteristics... configure: error: Link tests are not allowed after GCC_NO_EXECUTABLES.
    Which is due to the usage of libtool triggering a link test.
---
 patches/gcc/4.6.3/101-fix-no-executables.patch | 1141 ++++++++++++++++++++++++
 1 files changed, 1141 insertions(+), 0 deletions(-)
 create mode 100644 patches/gcc/4.6.3/101-fix-no-executables.patch

Most of this patch is just a rebuild of the autoconf. My patches are
available on github: https://github.com/jgunthorpe/crosstool-ng

I put this in the 4.6.3 directory because that is what I am using, but
it looks like it is needed for all of 4.6 and 4.7, there are many
reports of build failures due to this problem on the internet, I
assume it is triggered by a newer libtool in Oneiric or some such?

It would be great if this could be fixed in upstream GCC, maybe a
better approach would be to directly check if the compiler can link
and only then enable the GCC_NO_EXECUTABLES function, rather than
making assumptions based on cross compiling??
diff mbox

Patch

diff --git a/patches/gcc/4.6.3/101-fix-no-executables.patch b/patches/gcc/4.6.3/101-fix-no-executables.patch
new file mode 100644
index 0000000..13a68ef
--- /dev/null
+++ b/patches/gcc/4.6.3/101-fix-no-executables.patch
@@ -0,0 +1,1141 @@ 
+At some point the libstdc++ library configure script added a test for cross
+compiling, if so it disables all configure time compiler-link tests on the
+premis that the tool chain cannot link.
+
+In the crosstool-ng case, with at least glibc/eglibc, the libstdc++ build is
+done at the very end after a full libc is installed and all the start files
+are valid. The compiler can link, so take the test out of the libstdc++
+configure.
+
+Two reasons
+ 1) The libstdc++ configure has a hackish work around path for the no link case,
+    we don't want to use it unless *absolutely* necessary
+ 2) Some systems will hit this error:
+     checking dynamic linker characteristics... configure: error: Link tests are not allowed after GCC_NO_EXECUTABLES.
+    Which is due to the usage of libtool triggering a link test.
+
+diff -u gcc-4.6.3.orig/libstdc++-v3/configure.ac gcc-4.6.3/libstdc++-v3/configure.ac
+--- gcc-4.6.3.orig/libstdc++-v3/configure.ac	2012-09-17 22:45:33.966110989 -0600
++++ gcc-4.6.3/libstdc++-v3/configure.ac	2012-09-17 22:46:11.543201561 -0600
+@@ -52,7 +52,8 @@
+ 	;;
+ 
+       *)
+-	GCC_NO_EXECUTABLES
++#	GCC_NO_EXECUTABLES
++	GLIBCXX_IS_NATIVE=true
+ 	;;
+   esac
+ else
+--- gcc-4.6.3.orig/libstdc++-v3/configure	2012-09-18 00:00:24.449933919 -0600
++++ gcc-4.6.3/libstdc++-v3/configure	2012-09-18 00:00:35.190244290 -0600
+@@ -1913,10 +1913,7 @@
+ if { as_var=$3; eval "test \"\${$as_var+set}\" = set"; }; then :
+   $as_echo_n "(cached) " >&6
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ /* Define $2 to an innocuous variant, in case <limits.h> declares $2.
+    For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+@@ -3034,7 +3031,8 @@
+ 	;;
+ 
+       *)
+-
++#	GCC_NO_EXECUTABLES
++	GLIBCXX_IS_NATIVE=true
+ 	;;
+   esac
+ else
+@@ -3869,34 +3867,6 @@
+   return 0;
+ }
+ _ACEOF
+-# FIXME: Cleanup?
+-if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+-  (eval $ac_link) 2>&5
+-  ac_status=$?
+-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+-  test $ac_status = 0; }; then :
+-  gcc_no_link=no
+-else
+-  gcc_no_link=yes
+-fi
+-if test x$gcc_no_link = xyes; then
+-  # Setting cross_compile will disable run tests; it will
+-  # also disable AC_CHECK_FILE but that's generally
+-  # correct if we can't link.
+-  cross_compiling=yes
+-  EXEEXT=
+-else
+-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+-/* end confdefs.h.  */
+-
+-int
+-main ()
+-{
+-
+-  ;
+-  return 0;
+-}
+-_ACEOF
+ ac_clean_files_save=$ac_clean_files
+ ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out conftest.out"
+ # Try to create an executable without -o first, disregard a.out.
+@@ -4060,7 +4030,6 @@
+ rm -f conftest.$ac_ext
+ EXEEXT=$ac_cv_exeext
+ ac_exeext=$EXEEXT
+-fi
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+ $as_echo_n "checking for suffix of object files... " >&6; }
+ if test "${ac_cv_objext+set}" = set; then :
+@@ -7158,10 +7127,7 @@
+ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ ac_compiler_gnu=$ac_cv_c_compiler_gnu
+ 
+-     if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -7747,10 +7713,7 @@
+       save_LDFLAGS=$LDFLAGS
+       echo "_main" > conftest.sym
+       LDFLAGS="$LDFLAGS -Wl,-exported_symbols_list,conftest.sym"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -9514,10 +9477,7 @@
+ 	allow_undefined_flag='-berok'
+         # Determine the default libpath from the value encoded in an
+         # empty executable.
+-        if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -9557,10 +9517,7 @@
+ 	else
+ 	 # Determine the default libpath from the value encoded in an
+ 	 # empty executable.
+-	 if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -9843,10 +9800,7 @@
+ 	# implicitly export all symbols.
+         save_LDFLAGS="$LDFLAGS"
+         LDFLAGS="$LDFLAGS -shared ${wl}-exported_symbol ${wl}foo ${wl}-update_registry ${wl}/dev/null"
+-        if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ int foo(void) {}
+ _ACEOF
+@@ -10796,10 +10750,7 @@
+     save_libdir=$libdir
+     eval "libdir=/foo; wl=\"$lt_prog_compiler_wl\"; \
+ 	 LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec\""
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -11216,9 +11167,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-ldl  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -11272,9 +11220,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-ldld  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -11318,9 +11263,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-ldl  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -11360,9 +11302,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lsvld  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -11402,9 +11341,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-ldld  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -11484,7 +11420,7 @@
+   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+   lt_status=$lt_dlunknown
+   cat > conftest.$ac_ext <<_LT_EOF
+-#line 11487 "configure"
++#line 11423 "configure"
+ #include "confdefs.h"
+ 
+ #if HAVE_DLFCN_H
+@@ -11590,7 +11526,7 @@
+   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
+   lt_status=$lt_dlunknown
+   cat > conftest.$ac_ext <<_LT_EOF
+-#line 11593 "configure"
++#line 11529 "configure"
+ #include "confdefs.h"
+ 
+ #if HAVE_DLFCN_H
+@@ -12328,10 +12264,7 @@
+           allow_undefined_flag_CXX='-berok'
+           # Determine the default libpath from the value encoded in an empty
+           # executable.
+-          if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -12372,10 +12305,7 @@
+           else
+ 	    # Determine the default libpath from the value encoded in an
+ 	    # empty executable.
+-	    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -14479,10 +14409,7 @@
+     save_libdir=$libdir
+     eval "libdir=/foo; wl=\"$lt_prog_compiler_wl_CXX\"; \
+ 	 LDFLAGS=\"\$LDFLAGS $hardcode_libdir_flag_spec_CXX\""
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -14948,7 +14875,7 @@
+     #
+     # Fake what AC_TRY_COMPILE does.  XXX Look at redoing this new-style.
+     cat > conftest.$ac_ext << EOF
+-#line 14951 "configure"
++#line 14878 "configure"
+ struct S { ~S(); };
+ void bar();
+ void foo()
+@@ -15128,10 +15055,7 @@
+   $as_echo_n "(cached) " >&6
+ else
+ 
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -15174,10 +15098,7 @@
+   $as_echo_n "(cached) " >&6
+ else
+ 
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -15220,10 +15141,7 @@
+   $as_echo_n "(cached) " >&6
+ else
+ 
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -15266,10 +15184,7 @@
+   $as_echo_n "(cached) " >&6
+ else
+ 
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -15316,7 +15231,7 @@
+   # Fake what AC_TRY_COMPILE does.
+ 
+     cat > conftest.$ac_ext << EOF
+-#line 15319 "configure"
++#line 15234 "configure"
+ int main()
+ {
+   typedef bool atomic_type;
+@@ -15353,7 +15268,7 @@
+     rm -f conftest*
+ 
+     cat > conftest.$ac_ext << EOF
+-#line 15356 "configure"
++#line 15271 "configure"
+ int main()
+ {
+   typedef short atomic_type;
+@@ -15390,7 +15305,7 @@
+     rm -f conftest*
+ 
+     cat > conftest.$ac_ext << EOF
+-#line 15393 "configure"
++#line 15308 "configure"
+ int main()
+ {
+   // NB: _Atomic_word not necessarily int.
+@@ -15428,7 +15343,7 @@
+     rm -f conftest*
+ 
+     cat > conftest.$ac_ext << EOF
+-#line 15431 "configure"
++#line 15346 "configure"
+ int main()
+ {
+   typedef long long atomic_type;
+@@ -15504,7 +15419,7 @@
+   # unnecessary for this test.
+ 
+     cat > conftest.$ac_ext << EOF
+-#line 15507 "configure"
++#line 15422 "configure"
+ int main()
+ {
+   _Decimal32 d1;
+@@ -15957,10 +15872,7 @@
+     ac_res=-l$ac_lib
+     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+   fi
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-if ac_fn_c_try_link "$LINENO"; then :
++  if ac_fn_c_try_link "$LINENO"; then :
+   ac_cv_search_gettext=$ac_res
+ fi
+ rm -f core conftest.err conftest.$ac_objext \
+@@ -16368,9 +16280,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -16454,10 +16363,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <math.h>
+       volatile double d1, d2;
+@@ -16605,10 +16511,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <complex.h>
+ 	typedef __complex__ float float_type;
+@@ -16719,10 +16622,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdio.h>
+       #include <stdarg.h>
+@@ -16797,10 +16697,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdlib.h>
+       volatile float f;
+@@ -17802,10 +17699,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <unistd.h>
+        #include <stdio.h>
+@@ -17906,10 +17800,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <poll.h>
+ int
+@@ -17988,10 +17879,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <sys/stat.h>
+ int
+@@ -18040,10 +17928,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <sys/stat.h>
+ int
+@@ -18142,10 +18027,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <sys/uio.h>
+ int
+@@ -18851,10 +18733,7 @@
+ fi
+ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ else
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <sys/time.h>
+ int
+@@ -18963,10 +18842,7 @@
+     ac_res=-l$ac_lib
+     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+   fi
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-if ac_fn_cxx_try_link "$LINENO"; then :
++  if ac_fn_cxx_try_link "$LINENO"; then :
+   ac_cv_search_clock_gettime=$ac_res
+ fi
+ rm -f core conftest.err conftest.$ac_objext \
+@@ -19022,10 +18898,7 @@
+     ac_res=-l$ac_lib
+     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+   fi
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-if ac_fn_cxx_try_link "$LINENO"; then :
++  if ac_fn_cxx_try_link "$LINENO"; then :
+   ac_cv_search_nanosleep=$ac_res
+ fi
+ rm -f core conftest.err conftest.$ac_objext \
+@@ -19082,10 +18955,7 @@
+     ac_res=-l$ac_lib
+     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+   fi
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-if ac_fn_cxx_try_link "$LINENO"; then :
++  if ac_fn_cxx_try_link "$LINENO"; then :
+   ac_cv_search_clock_gettime=$ac_res
+ fi
+ rm -f core conftest.err conftest.$ac_objext \
+@@ -19141,10 +19011,7 @@
+     ac_res=-l$ac_lib
+     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+   fi
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-if ac_fn_cxx_try_link "$LINENO"; then :
++  if ac_fn_cxx_try_link "$LINENO"; then :
+   ac_cv_search_nanosleep=$ac_res
+ fi
+ rm -f core conftest.err conftest.$ac_objext \
+@@ -19211,10 +19078,7 @@
+     ac_res=-l$ac_lib
+     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+   fi
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-if ac_fn_cxx_try_link "$LINENO"; then :
++  if ac_fn_cxx_try_link "$LINENO"; then :
+   ac_cv_search_sched_yield=$ac_res
+ fi
+ rm -f core conftest.err conftest.$ac_objext \
+@@ -19280,10 +19144,7 @@
+     if test x"$ac_has_unistd_h" = x"yes"; then
+       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for monotonic clock" >&5
+ $as_echo_n "checking for monotonic clock... " >&6; }
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <unistd.h>
+ 	 #include <time.h>
+@@ -19313,10 +19174,7 @@
+ 
+       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for realtime clock" >&5
+ $as_echo_n "checking for realtime clock... " >&6; }
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <unistd.h>
+ 	 #include <time.h>
+@@ -19346,10 +19204,7 @@
+ 
+       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for nanosleep" >&5
+ $as_echo_n "checking for nanosleep... " >&6; }
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <unistd.h>
+ 	 #include <time.h>
+@@ -19721,10 +19576,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -19804,9 +19656,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -25501,10 +25350,7 @@
+ else
+ 
+     if test "$cross_compiling" = yes; then :
+-                if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ __thread int a; int b; int main() { return a = b; }
+ _ACEOF
+@@ -25517,18 +25363,12 @@
+ 	  esac
+ 	  chktls_save_CFLAGS="$CFLAGS"
+ 	  CFLAGS="-fPIC $CFLAGS"
+-	  	  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	  	  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ int f() { return 0; }
+ _ACEOF
+ if ac_fn_c_try_link "$LINENO"; then :
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ __thread int a; int b; int f() { return a = b; }
+ _ACEOF
+@@ -25561,10 +25401,7 @@
+ if ac_fn_c_try_run "$LINENO"; then :
+                       chktls_save_LDFLAGS="$LDFLAGS"
+       LDFLAGS="-static $LDFLAGS"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ int main() { return 0; }
+ _ACEOF
+@@ -25599,10 +25436,7 @@
+ 	thread_CFLAGS=failed
+ 	for flag in '' '-pthread' '-lpthread'; do
+ 	  CFLAGS="$flag $chktls_save_CFLAGS"
+-	  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <pthread.h>
+ 		void *g(void *d) { return NULL; }
+@@ -26268,10 +26102,7 @@
+ 
+     am_cv_func_iconv="no, consider installing GNU libiconv"
+     am_cv_lib_iconv=no
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdlib.h>
+ #include <iconv.h>
+@@ -26293,10 +26124,7 @@
+     if test "$am_cv_func_iconv" != yes; then
+       am_save_LIBS="$LIBS"
+       LIBS="$LIBS $LIBICONV"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdlib.h>
+ #include <iconv.h>
+@@ -26623,10 +26451,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -26706,9 +26531,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -32438,10 +32260,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -32521,9 +32340,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -38208,10 +38024,7 @@
+ 
+     am_cv_func_iconv="no, consider installing GNU libiconv"
+     am_cv_lib_iconv=no
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdlib.h>
+ #include <iconv.h>
+@@ -38233,10 +38046,7 @@
+     if test "$am_cv_func_iconv" != yes; then
+       am_save_LIBS="$LIBS"
+       LIBS="$LIBS $LIBICONV"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdlib.h>
+ #include <iconv.h>
+@@ -38351,9 +38161,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -44083,10 +43890,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -44297,10 +44101,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -44439,10 +44240,7 @@
+ else
+ 
+     if test "$cross_compiling" = yes; then :
+-                if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ __thread int a; int b; int main() { return a = b; }
+ _ACEOF
+@@ -44455,18 +44253,12 @@
+ 	  esac
+ 	  chktls_save_CFLAGS="$CFLAGS"
+ 	  CFLAGS="-fPIC $CFLAGS"
+-	  	  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	  	  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ int f() { return 0; }
+ _ACEOF
+ if ac_fn_c_try_link "$LINENO"; then :
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ __thread int a; int b; int f() { return a = b; }
+ _ACEOF
+@@ -44499,10 +44291,7 @@
+ if ac_fn_c_try_run "$LINENO"; then :
+                       chktls_save_LDFLAGS="$LDFLAGS"
+       LDFLAGS="-static $LDFLAGS"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ int main() { return 0; }
+ _ACEOF
+@@ -44537,10 +44326,7 @@
+ 	thread_CFLAGS=failed
+ 	for flag in '' '-pthread' '-lpthread'; do
+ 	  CFLAGS="$flag $chktls_save_CFLAGS"
+-	  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <pthread.h>
+ 		void *g(void *d) { return NULL; }
+@@ -44772,10 +44558,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -44855,9 +44638,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -50524,10 +50304,7 @@
+ else
+ 
+     if test "$cross_compiling" = yes; then :
+-                if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ __thread int a; int b; int main() { return a = b; }
+ _ACEOF
+@@ -50540,18 +50317,12 @@
+ 	  esac
+ 	  chktls_save_CFLAGS="$CFLAGS"
+ 	  CFLAGS="-fPIC $CFLAGS"
+-	  	  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	  	  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ int f() { return 0; }
+ _ACEOF
+ if ac_fn_c_try_link "$LINENO"; then :
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ __thread int a; int b; int f() { return a = b; }
+ _ACEOF
+@@ -50584,10 +50355,7 @@
+ if ac_fn_c_try_run "$LINENO"; then :
+                       chktls_save_LDFLAGS="$LDFLAGS"
+       LDFLAGS="-static $LDFLAGS"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ int main() { return 0; }
+ _ACEOF
+@@ -50622,10 +50390,7 @@
+ 	thread_CFLAGS=failed
+ 	for flag in '' '-pthread' '-lpthread'; do
+ 	  CFLAGS="$flag $chktls_save_CFLAGS"
+-	  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <pthread.h>
+ 		void *g(void *d) { return NULL; }
+@@ -50748,10 +50513,7 @@
+ 
+     am_cv_func_iconv="no, consider installing GNU libiconv"
+     am_cv_lib_iconv=no
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdlib.h>
+ #include <iconv.h>
+@@ -50773,10 +50535,7 @@
+     if test "$am_cv_func_iconv" != yes; then
+       am_save_LIBS="$LIBS"
+       LIBS="$LIBS $LIBICONV"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <stdlib.h>
+ #include <iconv.h>
+@@ -50941,10 +50700,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -51024,9 +50780,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -56741,10 +56494,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -56908,10 +56658,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -57057,10 +56804,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -57285,10 +57029,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -57368,9 +57109,6 @@
+ else
+   ac_check_lib_save_LIBS=$LIBS
+ LIBS="-lm  $LIBS"
+-if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+@@ -63085,10 +62823,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -63257,10 +62992,7 @@
+     # Check for -Wl,--gc-sections
+     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld that supports -Wl,--gc-sections" >&5
+ $as_echo_n "checking for ld that supports -Wl,--gc-sections... " >&6; }
+-    if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+  int one(void) { return 1; }
+      int two(void) { return 2; }
+@@ -63524,10 +63256,7 @@
+ 	# if programs are run by default against NPTL and if not, issue
+ 	# a warning.
+ 	enable_linux_futex=no
+-	if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <sys/syscall.h>
+ 	   int lk;
+@@ -63542,10 +63271,7 @@
+ if ac_fn_c_try_link "$LINENO"; then :
+   save_LIBS="$LIBS"
+ 	   LIBS="-lpthread $LIBS"
+-	   if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #ifndef _GNU_SOURCE
+ 	     #define _GNU_SOURCE 1
+@@ -63582,10 +63308,7 @@
+     conftest$ac_exeext conftest.$ac_ext
+ 	;;
+       yes)
+-	if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ #include <sys/syscall.h>
+ 	   int lk;
+@@ -64163,10 +63886,7 @@
+ $as_echo_n "checking for shared libgcc... " >&6; }
+   ac_save_CFLAGS="$CFLAGS"
+   CFLAGS=' -lgcc_s'
+-  if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int
+@@ -64196,10 +63916,7 @@
+     rm -f conftest.c conftest.so
+     if test x${glibcxx_libgcc_s_suffix+set} = xset; then
+       CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
+-      if test x$gcc_no_link = xyes; then
+-  as_fn_error "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+-fi
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+ 
+ int