From b5cdf931f2305dbddc4008879f81e1a3cb4c74ed Mon Sep 17 00:00:00 2001
From: Michel Pollet <buserror@gmail.com>
Date: Tue, 14 Oct 2014 18:44:24 +0100
Subject: [PATCH] build: re-accelerated the build

Simavr used to build pretty quick, and it's been crawling for a while
now, turns out some of the enhancements we added to the SIMAVR path
detection were being evaluated a LOT.
So went to the makefile and made sure most of the static variables are
evaluated once only.

Signed-off-by: Michel Pollet <buserror@gmail.com>
---
 Makefile.common          | 8 ++++----
 examples/Makefile.opengl | 2 +-
 tests/Makefile           | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/Makefile.common b/Makefile.common
index dbafa0b..42c7004 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -27,7 +27,7 @@
 #	along with simavr.  If not, see <http://www.gnu.org/licenses/>.
 
 # simavr directory
-SIMAVR		?= ${shell for p in . .. ../.. ../../..;do test -d $$p/simavr/sim && echo $$p/simavr; done}
+SIMAVR		:= ${shell for p in . .. ../.. ../../..;do test -d $$p/simavr/sim && echo $$p/simavr; done}
 
 # You can override the build settings with local changes in this file
 # for example:
@@ -37,7 +37,7 @@ SIMAVR		?= ${shell for p in . .. ../.. ../../..;do test -d $$p/simavr/sim && ech
 -include ${wildcard ${SIMAVR}/../.make.options*}
 
 # get the first character of what the compiler says it is, unless it's 'x86_64' doh
-ARCH 		= ${shell $(CC) -dumpmachine | sed -e 's/^x/i/' -e 's/\(.\).*/\1/'}
+ARCH 		:= ${shell $(CC) -dumpmachine | sed -e 's/^x/i/' -e 's/\(.\).*/\1/'}
 
 CFLAGS		+= -O2 -Wall
 CFLAGS		+= -g
@@ -91,8 +91,8 @@ MKDIR		?= mkdir -p
 INSTALL		?= install
 SHELL	 	:= ${shell which bash}
 	
-OBJ 		= obj-${shell $(CC) -dumpmachine}
-LIBDIR		= ${shell pwd}/${SIMAVR}/${OBJ}
+OBJ 		:= obj-${shell $(CC) -dumpmachine}
+LIBDIR		:= ${shell pwd}/${SIMAVR}/${OBJ}
 LDFLAGS 	+= -L${LIBDIR} -lsimavr 
 
 LDFLAGS 	+= -lelf 
diff --git a/examples/Makefile.opengl b/examples/Makefile.opengl
index 158be54..acd89f9 100644
--- a/examples/Makefile.opengl
+++ b/examples/Makefile.opengl
@@ -1,5 +1,5 @@
 
-UNAME = ${shell uname}
+UNAME := ${shell uname}
 
 ifeq (${UNAME}, Darwin)
 LDFLAGS 	+= -framework GLUT -framework OpenGL
diff --git a/tests/Makefile b/tests/Makefile
index cff14f3..3232c8b 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -26,8 +26,8 @@ simavr 		= ..
 IPATH 		+= ${simavr}/include
 IPATH 		+= ${simavr}/simavr/sim
 
-tests_src	= ${wildcard test_*.c}
-tests		= ${patsubst %.c, ${OBJ}/%.tst, ${tests_src}}
+tests_src	:= ${wildcard test_*.c}
+tests		:= ${patsubst %.c, ${OBJ}/%.tst, ${tests_src}}
 
 all: obj axf tests
 
-- 
2.39.5