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--- VDrift.orig/SConstruct
+++ VDrift/SConstruct
@@ -44,6 +44,7 @@
         LIBPATH = ['.', '#lib', LOCALBASE + '/lib'],
         LINKFLAGS = ['-pthread','-lintl'],
         options = opts)
+    env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS'])
     check_headers = ['GL/gl.h', 'GL/glu.h', 'SDL/SDL.h', 'SDL/SDL_image.h', 'SDL/SDL_rotozoom.h', 'vorbis/vorbisfile.h', 'GL/glew.h', 'bullet/btBulletCollisionCommon.h']
     check_libs = []
     if 'CC' in os.environ:
@@ -380,7 +381,7 @@
 if env['release']:
     # release build, debugging off, optimizations on
     if (sys.platform != 'freebsd6') and (sys.platform != 'freebsd7') and (sys.platform != 'freebsd8') and (sys.platform != 'freebsd9') and (sys.platform != 'win32') and (sys.platform != 'cygwin'):
-        env.Append(CCFLAGS = ['-O1', '-pipe'])
+        env.Append(CCFLAGS = ['-pipe'])
 else:
     # debug build, lots of debugging, no optimizations
     env.Append(CCFLAGS = ['-g3'])
@@ -399,7 +400,6 @@
     env.Append(CCFLAGS = ['-pg'])
     env.Append(LINKFLAGS = ['-pg'])
     env.Append(CCFLAGS = ['-g3'])
-    env.Append(CCFLAGS = ['-O1'])
 
 #------------------------------------#
 # compile-time efficiency assessment #