tests: Add -fshort-wchar tests

These tests are very tricky - in general -fshort-wchar is a dangerous
option because, since the standard library is not compiled with it, you
can't use any functions from either C or C++ standard library without
getting ABI mismatch.

The reason we want to use this is to do coverage testing on UTF32->UTF16
and UTF16->UTF32 conversion paths, that generally aren't hit on
gcc/clang. To do this, we carefully work around any internal calls to
wcslen/wcscmp that pugixml might be doing and don't use any wstring
functions.

1 files changed, 4 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index edc3c42..4b340a3 100644
--- a/Makefile
+++ b/Makefile
@@ -99,6 +99,10 @@ $(BUILD)/%.o: %
 	@mkdir -p $(dir $@)
 	$(CXX) $< $(CXXFLAGS) -c -MMD -MP -o $@
 
+$(BUILD)/tests/test_short_wchar.cpp.o: tests/test_short_wchar.cpp
+	@mkdir -p $(dir $@)
+	$(CXX) $< $(CXXFLAGS) -fshort-wchar -c -MMD -MP -o $@
+
 -include $(OBJECTS:.o=.d)
 
 .SECONDEXPANSION: