How to test if your Linux Support SSE2

Question

Actually I have 2 questions:

1. Is SSE2 Compatibility a CPU issue or Compiler issue?
2. How to check if your CPU or Compiler support SSE2?

I am u

Answer 1

The CPU needs to be able to execute SSE2 instrcutions, and the compiler needs to be able to generate them.

To check if your cpu supports SSE2:

# cat /proc/cpuinfo

It will be somewhere under "flags" if it is supported.

Update: So you cpu doesn't support it.

For the compiler:

# gcc -dumpmachine
# gcc --version

Target of your compiler needs to a kind of x86*, since only this cpus support sse2, which is part of the x86 instruction set

AND

gcc version needs to be >= 3.1 (most likely, since this is about 10 years old or something) for supporting SSE2.

Update: So your compiler doesn't support it on this target, it will if you are using it as a cross compiler for x86.