From f63a27e48932b496524024966e6e641ca244a3eb Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Wed, 5 Jan 2022 08:16:43 -0800
Subject: build: support CPPFLAGS.

* Makefile (TXR_CFLAGS): Pull in $(CPPFLAGS) also. It seems
some distros like Gentoo are relying on programs to
interpolate CPPFLAGS, and use this variable for passing
preprocessor-level options like -Dfoo=bar. This is an
incredibly bad, unnecessary idea, but let's play along.
Now because we are merging this into TXR_CFLAGS, it means
that these preprocessor-only flags are used for linking,
when nothing is being preprocessed, which makes no sense.
However, GNU Make's built-in recipe for linking C code seems
to do the same thing.
---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index d0354aa5..b5e446e4 100644
--- a/Makefile
+++ b/Makefile
@@ -33,8 +33,8 @@ endif
 
 VERBOSE :=
 TXR_CFLAGS := -iquote . $(if $(top_srcdir), -iquote $(top_srcdir)) \
-              $(LANG_FLAGS) $(DIAG_FLAGS) \
-              $(DBG_FLAGS) $(PLATFORM_CFLAGS) $(EXTRA_FLAGS) $(CFLAGS)
+              $(LANG_FLAGS) $(DIAG_FLAGS) $(DBG_FLAGS) $(PLATFORM_CFLAGS) \
+				  $(EXTRA_FLAGS) $(CFLAGS) $(CPPFLAGS)
 TXR_CFLAGS := $(filter-out $(REMOVE_FLAGS),$(TXR_CFLAGS))
 TXR_LDFLAGS := $(CONF_LDFLAGS) $(PLATFORM_LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS)
 TXR_LDLIBS := -lm $(CONF_LDLIBS) $(PLAFORM_LDLIBS) $(EXTRA_LDLIBS) $(LDLIBS)
-- 
cgit v1.2.3