Let the user specify CPPFLAGS - st - Personal fork of st
 (HTM) git clone git://git.drkhsh.at/st.git
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       ---
 (DIR) commit 16d98738e74f189b3a00c23390ab5a9a22b056a1
 (DIR) parent e23acb9188b7bc7a7cfc418ac45671003abcc341
 (HTM) Author: Paride Legovini <pl@ninthfloor.org>
       Date:   Thu, 10 Jan 2019 13:36:09 +0100
       
       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.
       
       Diffstat:
         M config.mk                           |       4 ++--
       
       1 file changed, 2 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/config.mk b/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: