From: Uwe Kleine-König <uwe@xxxxxxxxxxxxxxxxx>
Debian build scripts pass CFLAGS in the environment.
However, this is ignored by Sparse's Makefile since 'CFLAGS'
is unconditionaly initialized.
Fix this by initializing CFLAGS to its default value using '?='.
Do the same for PKG_CONFIG, DESTDIR, BINDIR & MANDIR.
Note: It's useless to try to do the same for CC, LD & AR since
they're builtin variables so '?= ...' is a no-op for them
(unless make is called with -R).
Note: This makes sparse native builds reproducible for Debian.
Signed-off-by: Uwe Kleine-König <uwe@xxxxxxxxxxxxxxxxx>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
Makefile | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/Makefile b/Makefile
index fce74a096..9c0691467 100644
--- a/Makefile
+++ b/Makefile
@@ -6,15 +6,17 @@ OS = linux
CC = gcc
-CFLAGS = -O2 -g
LD = $(CC)
AR = ar
-PKG_CONFIG = pkg-config
-DESTDIR=
+CFLAGS ?= -O2 -g
+
+DESTDIR ?=
PREFIX ?= $(HOME)
-BINDIR=$(PREFIX)/bin
-MANDIR=$(PREFIX)/share/man
+BINDIR ?= $(PREFIX)/bin
+MANDIR ?= $(PREFIX)/share/man
+
+PKG_CONFIG ?= pkg-config
# Allow users to override build settings without dirtying their trees
# For debugging, put this in local.mk:
--
2.20.0
