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/* This file contains various functions that take a stdenv and return
a new stdenv with different behaviour, e.g. using a different C
compiler. */
{dietlibc, fetchurl, runCommand}:
rec {
# Override the compiler in stdenv for specific packages.
overrideGCC = stdenv: gcc: stdenv //
{ mkDerivation = args: stdenv.mkDerivation (args // { NIX_GCC = gcc; });
};
# Add some arbitrary packages to buildInputs for specific packages.
# Used to override packages in stenv like Make. Should not be used
# for other dependencies.
overrideInStdenv = stdenv: pkgs: stdenv //
{ mkDerivation = args: stdenv.mkDerivation (args //
{ buildInputs = (if args ? buildInputs then args.buildInputs else []) ++ pkgs; }
);
};
# Override the setup script of stdenv. Useful for testing new
# versions of the setup script without causing a rebuild of
# everything.
#
# Example:
# randomPkg = import ../bla { ...
# stdenv = overrideSetup stdenv ../stdenv/generic/setup-latest.sh;
# };
overrideSetup = stdenv: setup: stdenv.regenerate setup;
# Return a modified stdenv that uses dietlibc to create small
# statically linked binaries.
useDietLibC = stdenv: stdenv //
{ mkDerivation = args: stdenv.mkDerivation (args // {
NIX_CFLAGS_LINK = "-static";
# libcompat.a contains some commonly used functions.
NIX_LDFLAGS = "-lcompat";
# These are added *after* the command-line flags, so we'll
# always optimise for size.
NIX_CFLAGS_COMPILE =
(if args ? NIX_CFLAGS_COMPILE then args.NIX_CFLAGS_COMPILE else "")
+ " -Os -s -D_BSD_SOURCE=1";
configureFlags =
(if args ? configureFlags then args.configureFlags else "")
+ " --disable-shared"; # brrr...
NIX_GCC = import ../build-support/gcc-wrapper {
inherit stdenv;
libc = dietlibc;
inherit (stdenv.gcc) gcc binutils name nativeTools nativePrefix;
nativeLibc = false;
};
});
isDietLibC = true;
} // {inherit fetchurl;};
# Return a modified stdenv that uses klibc to create small
# statically linked binaries.
useKlibc = stdenv: klibc: stdenv //
{ mkDerivation = args: stdenv.mkDerivation (args // {
NIX_CFLAGS_LINK = "-static";
# These are added *after* the command-line flags, so we'll
# always optimise for size.
NIX_CFLAGS_COMPILE =
(if args ? NIX_CFLAGS_COMPILE then args.NIX_CFLAGS_COMPILE else "")
+ " -Os -s";
configureFlags =
(if args ? configureFlags then args.configureFlags else "")
+ " --disable-shared"; # brrr...
NIX_GCC = runCommand "klibc-wrapper" {} ''
ensureDir $out/bin
ln -s ${klibc}/bin/klcc $out/bin/gcc
ln -s ${klibc}/bin/klcc $out/bin/cc
ensureDir $out/nix-support
echo 'PATH=$PATH:${stdenv.gcc.binutils}/bin' > $out/nix-support/setup-hook
'';
});
isKlibc = true;
isStatic = true;
} // {inherit fetchurl;};
# Return a modified stdenv that tries to build statically linked
# binaries.
makeStaticBinaries = stdenv: stdenv //
{ mkDerivation = args: stdenv.mkDerivation (args // {
NIX_CFLAGS_LINK = "-static";
configureFlags =
(if args ? configureFlags then args.configureFlags else "")
+ " --disable-shared"; # brrr...
});
isStatic = true;
} // {inherit fetchurl;};
}
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