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...ll dynamically test gcc and add flags, if the flag is supported. I'll leave it up to others to consider and/or integrate it and consider if /dev/null is portable enough. FLAGS := $(shell gcc -Wall -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wall) CFLAGS := $(shell gcc -Wallme -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wallme) all: @echo flags are $(FLAGS) @echo flags are $(CFLAGS) The down side, these execute every time the fragment is read. If limited to just a few directories, it should be fine, Makefile.common would hurt.

Google Test requires these CPP FLAGS "-Wno-missing-field-initializers - Wno-variadic-macros" in order to not output warnings. However, these flags are only available with gcc 4.X. We don't want to prevent users from being able to build with gcc 3.X which is the current situation (http://llvm.org/PR3487 ). I've disabled building Google Test in the 2.5 branch. Hopefully

...d add > flags, if the flag is supported. I'll leave it up to others to > consider and/or integrate it and consider if /dev/null is portable > enough. > > FLAGS := $(shell gcc -Wall -fsyntax-only -xc /dev/null 2>/dev/null && > echo -Wall) > CFLAGS := $(shell gcc -Wallme -fsyntax-only -xc /dev/null 2>/dev/null > && echo -Wallme) > all: > @echo flags are $(FLAGS) > @echo flags are $(CFLAGS) > > The down side, these execute every time the fragment is read. If > limited to just a few directories, it should be fine, Makefile.common &...