How to build chromium for CPUs that don't support SSE instructions?

[HS Z]

Hi,

I have a i586 CPU. It doesn't support SSE instructions. When I build chromium and run, it complains about illegal instruction. "gdb" tells me that there's a "cvtsi2sd" instruction in the function "tmalloc::SizeMap::NumMoveSize(unsigned int)" in "thirdparty/re2/re2/re2.cthirdparty/re2/re2/re2.c".

So I 

    export GYP_CFLAGS="-w -march=i586 -mno-sse -mno-sse2" CFLAGS="-w -march=i586 -mno-sse -mno-sse2" CXXFLAGS="-w -march=i586 -mno-sse -mno-sse2"

and run "./build/gyp_chromium", and build it again. But it seems that "third_party/qcms" needs SSE support because I have the error:

    In file included from ../../third_party/qcms/src/transform-sse2.c:22:0:

    /usr/lib/gcc/i686-linux-gnu/4.6/include/emmintrin.h:32:3: error: #error "SSE2 instruction set not enabled"

followed by a lot of "error: unknown type name ‘__m128’" and "error: ‘__m128i’ undeclared".

Is there an "official" way to build chromium for the "legacy" CPUs that don't support SSE instructions?

Thanks!

[Torne (Richard Coles)]

No, we don't do anything to support CPUs that old.

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[Nikos H.]

What instruction set(s) does the current stable version of chrome, and what the 64 bit dev/canary version? 

Thank you. 

[dhw]

As of this post, current Stable Chrome is v.35, which is the first Stable version that requires at least SSE2 graphics instructions on the CPU chip.

[Nikos H.]

Thanks.. And what about the upcoming (dev for now) 64 bit build?

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[Torne (Richard Coles)]

All x86-64 CPUs have at least SSE2, even the earliest Athlon 64 chips. I don't think we require anything higher than that.