Append flags

[mattip]

Replaces gh-82 : we should strip the linux binaries before shipping.

Issue gh-19 assumed that we do not override CFLAGS, but we do. Using a branch on a fork so successful builds are not uploaded

[charris]

Thanks Matti. There were no uploads, so that worked. Should we add back the -msse2 flags?

[mattip]

Should we add back the -msse2 flag

OK.

[mattip]

Hmm, it didn't work. The file sizes are the same.

[charris]

Looks like the manylinux2010 files are a lot bigger than manylinux1 files. Do they have an extra fortran library?

[charris]

There is no OpenBLAS in the manylinux1 wheels.

[charris]

Maybe we need to strip the OpenBLAS libraries. Do we want to do that?

[mattip]

There is no OpenBLAS in the manylinux1 wheels.

Whoops. numpy/numpy#16171

[mattip]

Maybe we need to strip the OpenBLAS libraries. Do we want to do that?

I think they are pretty good. strip -g didn't remove anything, strip -s reduced the 18.3 one from 29 to 28MB.

[seiko2plus]

@mattip, I checked build logs, and I found that LDFLAGS isn't exposed to all processes which make it invisible to distutils. xref matthew-brett/multibuild#329