re PR libstdc++/25797 (almost all libstdc++ tests fail)

2006-01-19  H.J. Lu  <hongjiu.lu@intel.com>

	PR libstdc++/25797
	* acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Remove -Werror
	from CFLAGS.  Check if linker really supports --gc-sections.
	* configure: Regenerated.

From-SVN: r109985

3 files changed, 139 insertions, 11 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 09bb51d..2ee8841 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2006-01-19  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR libstdc++/25797
+	* acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Remove -Werror
+	from CFLAGS.  Check if linker really supports --gc-sections.
+	* configure: Regenerated.
+
 2006-01-18  Paul Brook  <paul@codesourcery.com>
 
 	* libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Use std::abort.
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 52f15ae..d0a5a6b 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -237,7 +237,7 @@ AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
@@ -245,6 +245,17 @@ AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
      int two(void) { return 2; }
 	], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     AC_MSG_RESULT($ac_gcsections)
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index f7ac1a1..50b9361 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -8215,7 +8215,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -8274,6 +8274,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -53062,7 +53073,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -53121,6 +53132,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -74402,7 +74424,7 @@ done
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -74461,6 +74483,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -75905,7 +75938,7 @@ done
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -75964,6 +75997,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -77284,7 +77328,7 @@ done
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -77343,6 +77387,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -79450,7 +79505,7 @@ done
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -79509,6 +79564,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -80782,7 +80848,7 @@ done
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -80841,6 +80907,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -82163,7 +82240,7 @@ done
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -82222,6 +82299,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -83936,7 +84024,7 @@ echo "${ECHO_T}$glibcxx_cv_WRITEV" >&6
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -83995,6 +84083,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5
@@ -86030,7 +86129,7 @@ done
     # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
     ac_test_CFLAGS="${CFLAGS+set}"
     ac_save_CFLAGS="$CFLAGS"
-    CFLAGS='-x c++  -Werror -Wl,--gc-sections'
+    CFLAGS='-x c++ -Wl,--gc-sections'
 
     # Check for -Wl,--gc-sections
     echo "$as_me:$LINENO: checking for ld that supports -Wl,--gc-sections" >&5
@@ -86089,6 +86188,17 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
     if test "$ac_gcsections" = "yes"; then
+      rm -f conftest.c
+      touch conftest.c
+      if $CC -c conftest.c; then
+	if $LD --gc-sections -o conftest conftest.o 2>&1 | \
+	   grep "Warning: gc-sections option ignored" > /dev/null; then
+	  ac_gcsections=no
+	fi
+      fi
+      rm -f conftest.c conftest.o conftest
+    fi
+    if test "$ac_gcsections" = "yes"; then
       SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
     fi
     echo "$as_me:$LINENO: result: $ac_gcsections" >&5