use ?= operator for CPUOPTIMIZATIONS

added an experimental CPUOPTIMIZATIONS comment as a suggestion

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@8486 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/makefile.inc b/makefile.inc
index 6f8b8df655d7c965a216f7ef93910828d86d4c9f..0d5d790ba52d7deec656bca33513fc13a5b26600 100644 (file)
--- a/makefile.inc
+++ b/makefile.inc
@@ -6,19 +6,21 @@ CHECKLEVEL2 = @if [ "$(LEVEL)" != 2 ]; then $(MAKE) help; false; fi
 CC=gcc
 
 # athlon optimizations
-#CPUOPTIMIZATIONS=-march=athlon
+#CPUOPTIMIZATIONS?=-march=athlon
 # athlon xp optimizations
-#CPUOPTIMIZATIONS=-march=athlon-xp
+#CPUOPTIMIZATIONS?=-march=athlon-xp
 # athlon 64 optimizations
-#CPUOPTIMIZATIONS=-march=athlon64 -m32
+#CPUOPTIMIZATIONS?=-march=athlon64 -m32
 # Pentium 3 optimizations
-#CPUOPTIMIZATIONS=-march=pentium3
+#CPUOPTIMIZATIONS?=-march=pentium3
 # Pentium 4 optimizations
-#CPUOPTIMIZATIONS=-march=pentium4
+#CPUOPTIMIZATIONS?=-march=pentium4
 # 686 (Pentium Pro/II) optimizations
-#CPUOPTIMIZATIONS=-march=i686
+#CPUOPTIMIZATIONS?=-march=i686
 # No specific CPU (386 compatible)
-CPUOPTIMIZATIONS=
+CPUOPTIMIZATIONS?=
+# Experimental
+#CPUOPTIMIZATIONS?=-fno-math-errno -ffinite-math-only -fno-rounding-math -fno-signaling-nans -fassociative-math -freciprocal-math -fno-signed-zeros -fno-trapping-math
 
 SDL_CONFIG?=sdl-config
 SDLCONFIG_UNIXCFLAGS?=`$(SDL_CONFIG) --cflags`