1 files changed, 32 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/gcc/patches/libstdc++-target.patch b/nixpkgs/pkgs/development/compilers/gcc/patches/libstdc++-target.patch
new file mode 100644
index 000000000000..fb622b395806
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/gcc/patches/libstdc++-target.patch
@@ -0,0 +1,32 @@
+Patch to make the target libraries 'configure' scripts find the proper CPP.
+I noticed that building the mingw32 cross compiler.
+Looking at the build script for mingw in archlinux, I think that only nixos
+needs this patch. I don't know why.
+diff --git a/Makefile.in b/Makefile.in
+index 93f66b6..d691917 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -266,6 +266,7 @@ BASE_TARGET_EXPORTS = \
+ 	AR="$(AR_FOR_TARGET)"; export AR; \
+ 	AS="$(COMPILER_AS_FOR_TARGET)"; export AS; \
+ 	CC="$(CC_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS"; export CC; \
++	CPP="$(CC_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS -E"; export CC; \
+ 	CFLAGS="$(CFLAGS_FOR_TARGET)"; export CFLAGS; \
+ 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
+ 	CPPFLAGS="$(CPPFLAGS_FOR_TARGET)"; export CPPFLAGS; \
+@@ -291,11 +292,13 @@ BASE_TARGET_EXPORTS = \
+ RAW_CXX_TARGET_EXPORTS = \
+ 	$(BASE_TARGET_EXPORTS) \
+ 	CXX_FOR_TARGET="$(RAW_CXX_FOR_TARGET)"; export CXX_FOR_TARGET; \
+-	CXX="$(RAW_CXX_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS"; export CXX;
++	CXX="$(RAW_CXX_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS"; export CXX; \
++	CXXCPP="$(RAW_CXX_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS -E"; export CXX;
+ 
+ NORMAL_TARGET_EXPORTS = \
+ 	$(BASE_TARGET_EXPORTS) \
+-	CXX="$(CXX_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS"; export CXX;
++	CXX="$(CXX_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS"; export CXX; \
++	CXXCPP="$(CXX_FOR_TARGET) $(XGCC_FLAGS_FOR_TARGET) $$TFLAGS -E"; export CXX;
+ 
+ # Where to find GMP
+ HOST_GMPLIBS = @gmplibs@