# For gcc 4.1.2 on 32-bit Linux systems we have seen problems
# with using sse2 causing seg. faults. The same code and compiler
# version for 64-bit machines seems to run fine. We also have
# not observed the problems with 32-bit OS X machines. Therefore,
# we check and enable sse2 only if it is NOT for 32-bit Linux. 

DISABLE_SIMD=no
ifeq ($(OS),Linux)
  ifeq ($(ARCH),i686)
    DISABLE_SIMD=yes
  endif
endif

ifeq ($(DISABLE_SIMD),no)
  SIMD_CFLAGS = -DUSE_SIMD -msse2 -mfpmath=sse

  DISABLE_SSE3=no
# here one would put some check for the availability of sse3, but I don't know
# what check that would be...
  ifeq ($(DISABLE_SSE3),no)
  	SIMD_CFLAGS += -DUSE_SSE3 -msse3
  endif
 
  CFLAGS += $(SIMD_CFLAGS)
  CXXFLAGS += $(SIMD_CFLAGS)
endif