From eb21e8abd19b0d619cb3105b91e580fc13effb6e Mon Sep 17 00:00:00 2001
From: Aisha Tammy <gentoo@aisha.cc>
Date: Fri, 23 Oct 2020 15:36:23 +0000
Subject: [PATCH] don't alter toolchain vars if already provided

---
 Make.inc | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/Make.inc b/Make.inc
index adeb33d..f9b3397 100644
--- a/Make.inc
+++ b/Make.inc
@@ -10,41 +10,41 @@ VERSION = 0.7.0
 SOMAJOR = 3
 SOMINOR = 0
 DESTDIR =
-prefix = /usr/local
-bindir = $(prefix)/bin
-libdir = $(prefix)/lib
-includedir = $(prefix)/include
+prefix ?= /usr/local
+bindir ?= $(prefix)/bin
+libdir ?= $(prefix)/lib
+includedir ?= $(prefix)/include
 
 ifeq ($(OS), FreeBSD)
-pkgconfigdir = $(prefix)/libdata/pkgconfig
+pkgconfigdir ?= $(prefix)/libdata/pkgconfig
 else
-pkgconfigdir = $(libdir)/pkgconfig
+pkgconfigdir ?= $(libdir)/pkgconfig
 endif
 
-USEGCC = 1
-USECLANG = 0
+USEGCC ?= 1
+USECLANG ?= 0
 
 ifneq (,$(findstring $(OS),Darwin FreeBSD OpenBSD))
-USEGCC = 0
-USECLANG = 1
+USEGCC ?= 0
+USECLANG ?= 1
 endif
 
-AR = $(TOOLPREFIX)ar
+AR ?= $(TOOLPREFIX)ar
 
 ifeq ($(ARCH),wasm32)
-CC = clang-8
-USEGCC = 0
+CC ?= clang-8
+USEGCC ?= 0
 CFLAGS_add += -fno-builtin -fno-strict-aliasing
 endif
 
 ifeq ($(USECLANG),1)
-USEGCC = 0
-CC = clang
+USEGCC ?= 0
+CC ?= clang
 CFLAGS_add += -fno-builtin -fno-strict-aliasing
 endif
 
 ifeq ($(USEGCC),1)
-CC = $(TOOLPREFIX)gcc
+CC ?= $(TOOLPREFIX)gcc
 CFLAGS_add += -fno-gnu89-inline -fno-builtin
 endif