Best way to detect architecture in ebuild?

big_gie · Apprentice Joined: 31 Aug 2004 Posts: 158

Hi all,

I'm looking for the official way of detecting the machine's architecture in an ebuild.

I need this because some binary packages have different SRC_URI for different architectures and thus a different S too.

I was using if "[[ "${ARCH}" == "amd64" ]]; then" before but a user reported that ARCH was not set when using cave/paludis (https://github.com/nbigaouette/ebuilds/issues/8), so I changed this to "if use amd64; then". It seems that doing so breaks every other users though...

I could not find any information on the best way to handle these architecture dependencies in ebuilds... It seems SRC_URI can take advantage of use flags:

avx · Advocate Joined: 21 Jun 2004 Posts: 2152

dol-sen · Posted: Tue Jan 10, 2012 1:03 am Post subject:

You were on the right track with the arch use flags.

http://devmanual.gentoo.org/ebuild-writing/variables/index.html#src_uri

A little bit farther down that page is another section tilted: Version and Name Formatting Issues. It shows some info about odd handling odd naming, etc.. That will go hand in hand with:

http://www.gentoo.org/proj/en/devrel/handbook/handbook.xml?part=2&chap=3

under: Including version numbers in SRC_URI and S.

That should get you all fixed up. Also for IRC help there is also #gentoo-dev-help on the freenode network.
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