X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=Makefile.in;h=945fc5ddb8d003ae6e85270e75f3a72dfb5d00a3;hb=77ca787b12516ebb1b0d23710021b26b9c81b018;hp=c3cf12194db8bc68e4369663b60432eba05aa4bd;hpb=9b980aa1edeb440c40b001070e82a5461ac15d18;p=deliverable%2Fbinutils-gdb.git

diff --git a/Makefile.in b/Makefile.in
index c3cf12194d..945fc5ddb8 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)"