crosstool-ng/packages/glibc/2.15/0039-try-link-static.patch

[Patch modified to apply to 2.15]

commit 07037eeb43ca1e0ac2802e3a1492cecf869c63c6
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Thu Mar 8 00:17:27 2012 +0000

    Fix .ctors/.dtors header configure test for bootstrapping.

---
 aclocal.m4   |   14 ++++++++++++++
 configure    |   57 ++++++++++++++++++++++++++++++---------------------------
 configure.in |   27 ++++++++++-----------------
 3 files changed, 54 insertions(+), 44 deletions(-)

--- a/aclocal.m4
+++ b/aclocal.m4
@@ -114,3 +114,17 @@
 [LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
 gnu_ld=$libc_cv_prog_ld_gnu
 ])
+
+dnl Run a static link test with -nostdlib -nostartfiles.
+dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
+AC_DEFUN([LIBC_TRY_LINK_STATIC],
+[cat > conftest.c <<EOF
+int _start (void) { return 0; }
+int __start (void) { return 0; }
+$1
+EOF
+AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
+		       conftest.c -static -nostartfiles -nostdlib
+		       1>&AS_MESSAGE_LOG_FD])],
+      [$2], [$3])
+rm -f conftest*])
--- a/configure
+++ b/configure
@@ -6147,29 +6147,32 @@
 if ${libc_cv_initfini_array+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-    cat > conftest.c <<EOF
+  cat > conftest.c <<EOF
 int _start (void) { return 0; }
 int __start (void) { return 0; }
+
 int foo (void) { return 1; }
 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
+
 EOF
-  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
-		     -static -nostartfiles -nostdlib 1>&5'
+if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
+		       conftest.c -static -nostartfiles -nostdlib
+		       1>&5'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }
-  then
-    if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
-      libc_cv_initfini_array=yes
-    else
-      libc_cv_initfini_array=no
-    fi
+  test $ac_status = 0; }; }; then :
+  if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
+    libc_cv_initfini_array=yes
   else
     libc_cv_initfini_array=no
   fi
-  rm -f conftest*
+else
+  libc_cv_initfini_array=no
+fi
+rm -f conftest*
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_initfini_array" >&5
 $as_echo "$libc_cv_initfini_array" >&6; }
@@ -6183,21 +6186,22 @@
   $as_echo_n "(cached) " >&6
 else
       libc_cv_ctors_header=yes
-    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
+    cat > conftest.c <<EOF
+int _start (void) { return 0; }
+int __start (void) { return 0; }
+
+__attribute__ ((constructor)) void ctor (void) { asm (""); }
+__attribute__ ((destructor))  void dtor (void) { asm (""); }
 
-int
-main ()
-{
-
-__attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
-__attribute__ ((destructor))  void dtor (void) { puts("dtor"); }
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+EOF
+if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
+		       conftest.c -static -nostartfiles -nostdlib
+		       1>&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then :
         if $READELF -WS conftest$ac_exeext | $AWK '
 	{ gsub(/\[ */, "[") }
 	$2 == ".ctors" || $2 == ".dtors" {
@@ -6219,8 +6223,7 @@
         as_fn_error $? "missing __attribute__ ((constructor)) support??" "$LINENO" 5
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
+rm -f conftest*
 
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ctors_header" >&5
--- a/configure.in
+++ b/configure.in
@@ -1439,24 +1439,17 @@
 
   AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
 		 libc_cv_initfini_array, [dnl
-  cat > conftest.c <<EOF
-int _start (void) { return 0; }
-int __start (void) { return 0; }
+LIBC_TRY_LINK_STATIC([
 int foo (void) { return 1; }
 int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
-EOF
-  if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
-		     -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
-  then
-    if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
-      libc_cv_initfini_array=yes
-    else
-      libc_cv_initfini_array=no
-    fi
+],
+  [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
+    libc_cv_initfini_array=yes
   else
     libc_cv_initfini_array=no
-  fi
-  rm -f conftest*])
+  fi],
+  [libc_cv_initfini_array=no])
+])
   if test $libc_cv_initfini_array != yes; then
     AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
   fi
@@ -1464,9 +1457,9 @@
   AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
 		 libc_cv_ctors_header, [dnl
     libc_cv_ctors_header=yes
-    AC_TRY_LINK([], [
-__attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
-__attribute__ ((destructor))  void dtor (void) { puts("dtor"); }
+    LIBC_TRY_LINK_STATIC([
+__attribute__ ((constructor)) void ctor (void) { asm (""); }
+__attribute__ ((destructor))  void dtor (void) { asm (""); }
 ],
 		[dnl
       AS_IF([$READELF -WS conftest$ac_exeext | $AWK '