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Lluís Batlle i Rossell 585ba8c27f Big fixes in the cross build:

- Before this changes, cflags and ldflags for the native and the cross compiler
  got mixed. Not all the gcc-wrapper/gcc-cross-wrapper variables are
  independant now, but enough, I think.
- Fixed the generic stdenv expression, which did a big mess on buildInputs and
  buildNativeInputs. Now it distinguishes when there is a stdenvCross or not.
  Maybe we should have a single stdenv and forget about the stdenvCross
  adapter - this could end in a stdenv a bit complex, but simpler than the
  generic stdenv + adapter.
- Added basic support in pkgconfig for cross-builds: a single PKG_CONFIG_PATH
  now works for both the cross and the native compilers, but I think this
  should work well for most cases I can think of.
- I tried to fix the guile expression to cross-biuld; guile is built, but not
  its manual, so the derivation still fails. Guile requires patching to
  cross-build, as far as I understnad.
- Made the glibcCross build to be done through the usage of a
  gcc-cross-wrapper over the gcc-cross-stage-static, instead of using it
  directly.
- Trying to make physfs (a neverball dependency) cross build.
- Updated the gcc expression to support building a cross compiler without getting
  derivation variables mixed with those of the stdenvCross.

svn path=/nixpkgs/branches/stdenv-updates/; revision=18534

2009-11-22 19:51:45 +00:00

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 export NIX_CROSS_CFLAGS_COMPILE="@cflagsCompile@ $NIX_CROSS_CFLAGS_COMPILE"
 export NIX_CROSS_CFLAGS_LINK="@cflagsLink@ $NIX_CROSS_CFLAGS_LINK"
 export NIX_CROSS_LDFLAGS="@ldflags@ $NIX_CROSS_LDFLAGS"
 export NIX_CROSS_LDFLAGS_BEFORE="@ldflagsBefore@ $NIX_CROSS_LDFLAGS_BEFORE"
 export NIX_CROSS_GLIBC_FLAGS_SET=1