Use CPPFLAGS alongside CFLAGS and CXXFLAGS during build. - #502
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It is a convention inherited from GNU automake to use CPPFLAGS for compiler flag intended for the preprocessor, while CFLAGS and and CXXFLAGS provide flags intended for the C and C++ compiler. Adjust build rules to include CPPFLAGS ensure any preprocessor flags in build systems using this environment variable work out of the box. This allow Debian builds to pass on hardening flags without modifying the build setup. Patch from Ruben Undheim via Debian
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It is a convention inherited from GNU automake to use CPPFLAGS for compiler flag intended for the preprocessor, while CFLAGS and and CXXFLAGS provide flags intended for the C and C++ compiler. Adjust build rules to include CPPFLAGS ensure any preprocessor flags in build systems using this environment variable work out of the box.
This allow Debian builds to pass on hardening flags without modifying the build setup.
Patch from Ruben Undheim via Debian