nixpkgs/pkgs/build-support/gcc-cross-wrapper/default.nix
2012-12-28 19:54:15 +01:00

63 lines
2.1 KiB
Nix

# The Nix `gcc' stdenv.mkDerivation is not directly usable, since it doesn't
# know where the C library and standard header files are. Therefore
# the compiler produced by that package cannot be installed directly
# in a user environment and used from the command line. This
# stdenv.mkDerivation provides a wrapper that sets up the right environment
# variables so that the compiler and the linker just "work".
{ name ? "", stdenv, nativeTools, nativeLibc, noLibc ? false, nativePrefix ? ""
, gcc ? null, libc ? null, binutils ? null, shell ? "", cross
}:
assert nativeTools -> nativePrefix != "";
assert !nativeTools -> gcc != null && binutils != null;
assert !noLibc -> (!nativeLibc -> libc != null);
let
chosenName = if name == "" then gcc.name else name;
gccLibs = stdenv.mkDerivation {
name = chosenName + "-libs";
phases = [ "installPhase" ];
installPhase = ''
echo $out
mkdir -p "$out"
if [ -d "${gcc}/${cross.config}/lib" ]
then
cp -Rd "${gcc}/${cross.config}/lib" "$out/lib"
chmod -R +w "$out/lib"
for a in "$out/lib/"*.la; do
sed -i -e "s,${gcc}/${cross.config}/lib,$out/lib,g" $a
done
rm -f "$out/lib/"*.py
else
# The MinGW cross-compiler falls into this category.
mkdir "$out/lib"
fi
'';
};
in
stdenv.mkDerivation {
builder = ./builder.sh;
setupHook = ./setup-hook.sh;
gccWrapper = ./gcc-wrapper.sh;
ldWrapper = ./ld-wrapper.sh;
utils = ./utils.sh;
addFlags = ./add-flags;
inherit nativeTools nativeLibc nativePrefix gcc libc binutils;
crossConfig = if cross != null then cross.config else null;
gccLibs = if gcc != null then gccLibs else null;
name = chosenName;
langC = if nativeTools then true else gcc.langC;
langCC = if nativeTools then true else gcc.langCC;
langF77 = if nativeTools then false else gcc ? langFortran;
shell = if shell == "" then stdenv.shell else shell;
meta = if gcc != null then gcc.meta else
{ description = "System C compiler wrapper";
};
passthru = {
target = cross;
};
}