[Sbcl-devel] Respect the environment's CFLAGS

[John F. <jo...@fr...>]

As a generally well-behaved makefile should . . .

diff --git a/src/runtime/GNUmakefile b/src/runtime/GNUmakefile
index cfaac20..ce5e51f 100644
--- a/src/runtime/GNUmakefile
+++ b/src/runtime/GNUmakefile
@@ -23,7 +23,7 @@ NM = nm -gp
 DEPEND_FLAGS = -MM
 GREP = grep
 
-CFLAGS = -g -Wall -Wsign-compare -O3
+CFLAGS := -g -Wall -Wsign-compare -O3 $(CFLAGS)
 ASFLAGS = $(CFLAGS)
 CPPFLAGS = -I.