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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@
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