diff --git a/ChangeLog b/ChangeLog
index 4512ab575d62365b2175799b226cc009e4fdcfcb..f169b7a7512cfc287e4999b46a8965c6287ea49a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2010-11-26 Alexandre Oliva <aoliva@redhat.com>
+
+ PR other/46020
+ * configure.ac (CXX_FOR_TARGET): Add -funconfigured-libstdc++-v3.
+ * Makefile.def (CXX_FOR_TARGET): Removed from flags_to_pass.
+ * Makefile.tpl (CXX_FOR_TARGET_FLAG_TO_PASS): New.
+ (BASE_FLAGS_TO_PASS): Use it.
+ * configure: Rebuilt.
+ * Makefile.in: Rebuilt.
+
2010-11-23 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/12258
diff --git a/Makefile.def b/Makefile.def
index 65d50ff193c0a26a715c2112f8081295e82134ac..8eb5b03a3d9a3768304c129b61404f27794d8821 100644
--- a/Makefile.def
+++ b/Makefile.def
@@ -282,7 +282,6 @@ flags_to_pass = { flag= AS_FOR_TARGET ; };
flags_to_pass = { flag= CC_FOR_TARGET ; };
flags_to_pass = { flag= CFLAGS_FOR_TARGET ; };
flags_to_pass = { flag= CPPFLAGS_FOR_TARGET ; };
-flags_to_pass = { flag= CXX_FOR_TARGET ; };
flags_to_pass = { flag= CXXFLAGS_FOR_TARGET ; };
flags_to_pass = { flag= DLLTOOL_FOR_TARGET ; };
flags_to_pass = { flag= FLAGS_FOR_TARGET ; };
diff --git a/Makefile.in b/Makefile.in
index c3cf12194db8bc68e4369663b60432eba05aa4bd..945fc5ddb8d003ae6e85270e75f3a72dfb5d00a3 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -640,6 +640,26 @@ HOST_LIB_PATH_libelf = \
@endif libelf
+CXX_FOR_TARGET_FLAG_TO_PASS = \
+ "CXX_FOR_TARGET=$(CXX_FOR_TARGET)"
+@if target-libstdc++-v3
+# CXX_FOR_TARGET is tricky to get right for target libs that require a
+# functional C++ compiler. When we recurse, if we expand
+# CXX_FOR_TARGET before configuring libstdc++-v3, we won't get
+# libstdc++ include flags from the script. Instead, we get an
+# -funconfigured-* word, so that we'll get errors if this invalid C++
+# command line is used for anything, but also so that we can use the
+# word to decide whether or not to pass on this CXX_FOR_TARGET. If we
+# don't pass it on, sub-make will use the default definition, that
+# re-expands it at the time of use, so we'll get it right when we need
+# it. One potential exception is the expansion of CXX_FOR_TARGET
+# passed down as part of CXX within TARGET_FLAGS, but this wouldn't
+# really work, for C++ host programs can't depend on the current-stage
+# C++ target library.
+CXX_FOR_TARGET_FLAG_TO_PASS = \
+ $(shell if echo "$(CXX_FOR_TARGET)" | grep " -funconfigured-" > /dev/null; then :; else echo '"CXX_FOR_TARGET=$(CXX_FOR_TARGET)"'; fi)
+@endif target-libstdc++-v3
+
# Flags to pass down to all sub-makes.
BASE_FLAGS_TO_PASS = \
"DESTDIR=$(DESTDIR)" \
@@ -707,7 +727,6 @@ BASE_FLAGS_TO_PASS = \
"CC_FOR_TARGET=$(CC_FOR_TARGET)" \
"CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
"CPPFLAGS_FOR_TARGET=$(CPPFLAGS_FOR_TARGET)" \
- "CXX_FOR_TARGET=$(CXX_FOR_TARGET)" \
"CXXFLAGS_FOR_TARGET=$(CXXFLAGS_FOR_TARGET)" \
"DLLTOOL_FOR_TARGET=$(DLLTOOL_FOR_TARGET)" \
"FLAGS_FOR_TARGET=$(FLAGS_FOR_TARGET)" \
@@ -747,6 +766,7 @@ BASE_FLAGS_TO_PASS = \
"STAGEfeedback_CFLAGS=$(STAGEfeedback_CFLAGS)" \
"STAGEfeedback_CXXFLAGS=$(STAGEfeedback_CXXFLAGS)" \
"STAGEfeedback_TFLAGS=$(STAGEfeedback_TFLAGS)" \
+ $(CXX_FOR_TARGET_FLAG_TO_PASS) \
"TFLAGS=$(TFLAGS)" \
"CONFIG_SHELL=$(SHELL)" \
"MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)"
diff --git a/Makefile.tpl b/Makefile.tpl
index 2caa0bb1a4406aadd4e42c4efa17b6ed1aeff590..f9a2936c33c8089bf5e2b87434a56079b37a5c61 100644
--- a/Makefile.tpl
+++ b/Makefile.tpl
@@ -551,6 +551,26 @@ HOST_LIB_PATH_[+module+] = \
@endif [+module+]
[+ ENDIF lib_path +][+ ENDFOR host_modules +]
+CXX_FOR_TARGET_FLAG_TO_PASS = \
+ "CXX_FOR_TARGET=$(CXX_FOR_TARGET)"
+@if target-libstdc++-v3
+# CXX_FOR_TARGET is tricky to get right for target libs that require a
+# functional C++ compiler. When we recurse, if we expand
+# CXX_FOR_TARGET before configuring libstdc++-v3, we won't get
+# libstdc++ include flags from the script. Instead, we get an
+# -funconfigured-* word, so that we'll get errors if this invalid C++
+# command line is used for anything, but also so that we can use the
+# word to decide whether or not to pass on this CXX_FOR_TARGET. If we
+# don't pass it on, sub-make will use the default definition, that
+# re-expands it at the time of use, so we'll get it right when we need
+# it. One potential exception is the expansion of CXX_FOR_TARGET
+# passed down as part of CXX within TARGET_FLAGS, but this wouldn't
+# really work, for C++ host programs can't depend on the current-stage
+# C++ target library.
+CXX_FOR_TARGET_FLAG_TO_PASS = \
+ $(shell if echo "$(CXX_FOR_TARGET)" | grep " -funconfigured-" > /dev/null; then :; else echo '"CXX_FOR_TARGET=$(CXX_FOR_TARGET)"'; fi)
+@endif target-libstdc++-v3
+
# Flags to pass down to all sub-makes.
BASE_FLAGS_TO_PASS =[+ FOR flags_to_pass +][+ IF optional +] \
"`echo '[+flag+]=$([+flag+])' | sed -e s'/[^=][^=]*=$$/XFOO=/'`"[+ ELSE optional +] \
@@ -558,6 +578,7 @@ BASE_FLAGS_TO_PASS =[+ FOR flags_to_pass +][+ IF optional +] \
"STAGE[+id+]_CFLAGS=$(STAGE[+id+]_CFLAGS)" \
"STAGE[+id+]_CXXFLAGS=$(STAGE[+id+]_CXXFLAGS)" \
"STAGE[+id+]_TFLAGS=$(STAGE[+id+]_TFLAGS)"[+ ENDFOR bootstrap-stage +] \
+ $(CXX_FOR_TARGET_FLAG_TO_PASS) \
"TFLAGS=$(TFLAGS)" \
"CONFIG_SHELL=$(SHELL)" \
"MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)"
diff --git a/configure b/configure
index 8b67ba343c2cd0d5b9547aff1a7bfa81476bdd4f..683341345d1d59f7e024d54a6d97e999ca597a93 100755
--- a/configure
+++ b/configure
@@ -13363,7 +13363,7 @@ else
esac
if test $ok = yes; then
# An in-tree tool is available and we can use it
- CXX_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/g++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `test ! -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags || $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs'
+ CXX_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/g++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `if test -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags; then $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes; else echo -funconfigured-libstdc++-v3 ; fi` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs'
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: just compiled" >&5
$as_echo "just compiled" >&6; }
elif expr "x$CXX_FOR_TARGET" : "x/" > /dev/null; then
diff --git a/configure.ac b/configure.ac
index 294f241bca099e4d5d5b62bd598d6cd996f7b6eb..7859290a8b81d65794ed116eac869e98adac97a9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3236,7 +3236,7 @@ GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
- [gcc/g++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `test ! -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags || $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs],
+ [gcc/g++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `if test -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags; then $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes; else echo -funconfigured-libstdc++-v3 ; fi` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs],dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
c++)
GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
[gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs],