From c5f716d03d03a0a5c58dea3db96434fd74cffeda Mon Sep 17 00:00:00 2001
From: Richard Roberts <richard.jw.roberts@gmail.com>
Date: Sat, 5 Jun 2010 19:44:04 +0000
Subject: [PATCH] Made Makefiles not override $CC and $CXX variables (needed
 for cross-compiling)

---
 CppUnitLite/Makefile | 8 ++++----
 colamd/Makefile      | 4 ++--
 ldl/Makefile         | 2 +-
 ldl/UFconfig.mk      | 2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/CppUnitLite/Makefile b/CppUnitLite/Makefile
index 83a6f8c52..b319919b5 100644
--- a/CppUnitLite/Makefile
+++ b/CppUnitLite/Makefile
@@ -4,9 +4,9 @@
 
 all: libCppUnitLite.a
 
-CC=gcc
-CXX=gcc
-CPP=gcc
+CC ?= gcc
+CXX ?= g++
+CPP ?= cpp
 CXXFLAGS += -O2
 
 sources = $(shell ls *.cpp)
@@ -32,4 +32,4 @@ install: all
 
 distclean: clean
 
-check: all
\ No newline at end of file
+check: all
diff --git a/colamd/Makefile b/colamd/Makefile
index 987b41b80..85b1a2243 100755
--- a/colamd/Makefile
+++ b/colamd/Makefile
@@ -4,8 +4,8 @@
 
 all: libcolamd.a
 
-CC=gcc
-CXX=gcc
+CC ?= gcc
+CXX ?= g++
 CXXFLAGS += -O2
 CXXFLAGS += -fPIC
 
diff --git a/ldl/Makefile b/ldl/Makefile
index 9f2f0384e..74d03a180 100644
--- a/ldl/Makefile
+++ b/ldl/Makefile
@@ -9,7 +9,7 @@ include ./UFconfig.mk
 CXXFLAGS += -O2
 CXXFLAGS += -fPIC -I./
 
-CXX = g++
+CXX ?= g++
 
 all: demo
 
diff --git a/ldl/UFconfig.mk b/ldl/UFconfig.mk
index bda4c7b1d..3ca3e3940 100644
--- a/ldl/UFconfig.mk
+++ b/ldl/UFconfig.mk
@@ -33,7 +33,7 @@
 # C compiler and compiler flags:  These will normally not give you optimal
 # performance.  You should select the optimization parameters that are best
 # for your system.  On Linux, use "CFLAGS = -O3 -fexceptions" for example.
-CC = cc
+CC ?= cc
 # CFLAGS = -O   (for example; see below for details)
 
 # C++ compiler (also uses CFLAGS)