From a7503e2be290b2de6e440d3ec1fff172326330b9 Mon Sep 17 00:00:00 2001
From: Helmut Grohne <helmut@subdivi.de>
Date: Sun, 27 May 2018 19:28:47 +0200
Subject: [PATCH] Make pkg-config substitutable

This helps with cross-compilation. When cross-compiling, the environment
variable PKG_CONFIG is typically set to a version of pkg-config that is
configured to look in appropriate locations for the cross architecture.

For example, a build for 64-bit ARM might use:

    make \
        CC=aarch64-linux-gnu-gcc \
        STRIP=aarch64-linux-gnu-strip \
        PKG_CONFIG=aarch64-linux-gnu-pkg-config \
        release

On a Debian system, this would look in
/usr/lib/aarch64-linux-gnu/pkgconfig for details of 64-bit ARM Opus
libraries.

Bug-Debian: https://bugs.debian.org/900217
---
 Quake/Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Quake/Makefile b/Quake/Makefile
index fe1ae833..a74b102d 100644
--- a/Quake/Makefile
+++ b/Quake/Makefile
@@ -46,6 +46,7 @@ CC ?= gcc
 LINKER = $(CC)
 
 STRIP ?= strip
+PKG_CONFIG ?= pkg-config
 
 #CPUFLAGS= -mtune=i686
 #CPUFLAGS= -march=pentium4
@@ -153,8 +154,8 @@ ifeq ($(USE_CODEC_OPUS),1)
 # but they include the headers without the opus directory
 # prefix and rely on pkg-config. ewww...
 CFLAGS+= -DUSE_CODEC_OPUS
-CFLAGS+= $(shell pkg-config --cflags opusfile)
-CODECLIBS+= $(shell pkg-config --libs   opusfile)
+CFLAGS+= $(shell $(PKG_CONFIG) --cflags opusfile)
+CODECLIBS+= $(shell $(PKG_CONFIG) --libs   opusfile)
 endif
 ifeq ($(USE_CODEC_VORBIS),1)
 CFLAGS+= -DUSE_CODEC_VORBIS $(cpp_vorbisdec)