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nixpkgs/pkgs/build-support/gcc-wrapper2/add-flags
Lluís Batlle i Rossell f3c23487a2 Adding a new version of the gcc-wrapper, named gcc-wrapper2, in order not to rebuild
stdenv.

In this gcc-wrapper2 I made the ld-wrapper.sh to handle the linking with shared
objects through direct pass as ld command arguments of the absolute path to shared
objects, instead of using the -L/-l combinations.

cmake 'FindXXX.cmake' modules make a strong usage of the dynamic linking directly
passing the absolute path to the shared object to the linker, and as our wrapper did
not add any -rpath for those, writting the nix expressions for some cmake packages
resulted in a lot of tricks, compared to using this gcc-wrapper2.

This gcc-wrapper2/ld-wrapper.sh should become the gcc-wrapper/ld-wrapper in a
stdenv update.

I also updated some cmake expressions to use this gcc-wrapper2, and reduced its
tricks.

I also updated the cmake setup-hook for it to make cmake not touch any rpath decided
at build time, when running the 'make install' of makefiles created by cmake.

svn path=/nixpkgs/trunk/; revision=18885
2009-12-10 22:19:52 +00:00

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# `-B@out@/bin' forces gcc to use ld-wrapper.sh when calling ld.
export NIX_CFLAGS_COMPILE="-B@out@/bin/ $NIX_CFLAGS_COMPILE"
if test -e @out@/nix-support/libc-cflags; then
export NIX_CFLAGS_COMPILE="$(cat @out@/nix-support/libc-cflags) $NIX_CFLAGS_COMPILE"
fi
if test -e @out@/nix-support/gcc-cflags; then
export NIX_CFLAGS_COMPILE="$(cat @out@/nix-support/gcc-cflags) $NIX_CFLAGS_COMPILE"
fi
if test -e @out@/nix-support/libc-ldflags; then
export NIX_LDFLAGS="$NIX_LDFLAGS $(cat @out@/nix-support/libc-ldflags)"
fi
if test -e @out@/nix-support/gcc-ldflags; then
export NIX_LDFLAGS="$NIX_LDFLAGS $(cat @out@/nix-support/gcc-ldflags)"
fi
if test -e @out@/nix-support/libc-ldflags-before; then
export NIX_LDFLAGS_BEFORE="$(cat @out@/nix-support/libc-ldflags-before) $NIX_LDFLAGS_BEFORE"
fi
export NIX_GCC_WRAPPER_FLAGS_SET=1