commit 16d98738e74f189b3a00c23390ab5a9a22b056a1
from: Paride Legovini <pl@ninthfloor.org>
via: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Thu Jan 10 17:13:13 2019 UTC

Let the user specify CPPFLAGS

This complements the work done in d4928ed, allowing the user to specify
the preprocessor flags with the CPPFLAGS environment variable. This is
useful for example to specify preprocessor macros with -D.

CFLAGS could be used instead, but CPPFLAGS is more correct and is expected
to be honored in some cases. For example, the helper scripts to build
Debian packages make use of CPPFLAGS, but the variable is currently
being ignored unless manually appended to CFLAGS.

commit - e23acb9188b7bc7a7cfc418ac45671003abcc341
commit + 16d98738e74f189b3a00c23390ab5a9a22b056a1
blob - 64a1da92c7b5d4a45d7e6b47dad1a083af683751
blob + 5059632c0da6d75b134cca69253cc77750fbf37c
--- config.mk
+++ config.mk
@@ -21,8 +21,8 @@ LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \
        `$(PKG_CONFIG) --libs freetype2`
 
 # flags
-CPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600
-STCFLAGS = $(INCS) $(CPPFLAGS) $(CFLAGS)
+STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600
+STCFLAGS = $(INCS) $(STCPPFLAGS) $(CPPFLAGS) $(CFLAGS)
 STLDFLAGS = $(LIBS) $(LDFLAGS)
 
 # OpenBSD: