125 lines
3.8 KiB
Nix
125 lines
3.8 KiB
Nix
/* This file contains various functions that take a stdenv and return
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a new stdenv with different behaviour, e.g. using a different C
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compiler. */
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{dietlibc, fetchurl, runCommand}:
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rec {
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# Override the compiler in stdenv for specific packages.
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overrideGCC = stdenv: gcc: stdenv //
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{ mkDerivation = args: stdenv.mkDerivation (args // { NIX_GCC = gcc; });
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};
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# Add some arbitrary packages to buildInputs for specific packages.
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# Used to override packages in stenv like Make. Should not be used
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# for other dependencies.
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overrideInStdenv = stdenv: pkgs: stdenv //
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{ mkDerivation = args: stdenv.mkDerivation (args //
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{ buildInputs = (if args ? buildInputs then args.buildInputs else []) ++ pkgs; }
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);
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};
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# Override the setup script of stdenv. Useful for testing new
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# versions of the setup script without causing a rebuild of
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# everything.
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#
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# Example:
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# randomPkg = import ../bla { ...
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# stdenv = overrideSetup stdenv ../stdenv/generic/setup-latest.sh;
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# };
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overrideSetup = stdenv: setup: stdenv.regenerate setup;
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# Return a modified stdenv that uses dietlibc to create small
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# statically linked binaries.
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useDietLibC = stdenv: stdenv //
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{ mkDerivation = args: stdenv.mkDerivation (args // {
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NIX_CFLAGS_LINK = "-static";
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# libcompat.a contains some commonly used functions.
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NIX_LDFLAGS = "-lcompat";
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# These are added *after* the command-line flags, so we'll
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# always optimise for size.
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NIX_CFLAGS_COMPILE =
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(if args ? NIX_CFLAGS_COMPILE then args.NIX_CFLAGS_COMPILE else "")
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+ " -Os -s -D_BSD_SOURCE=1";
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configureFlags =
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(if args ? configureFlags then args.configureFlags else "")
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+ " --disable-shared"; # brrr...
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NIX_GCC = import ../build-support/gcc-wrapper {
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inherit stdenv;
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libc = dietlibc;
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inherit (stdenv.gcc) gcc binutils name nativeTools nativePrefix;
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nativeLibc = false;
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};
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});
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isDietLibC = true;
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} // {inherit fetchurl;};
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# Return a modified stdenv that uses klibc to create small
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# statically linked binaries.
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useKlibc = stdenv: klibc: stdenv //
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{ mkDerivation = args: stdenv.mkDerivation (args // {
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NIX_CFLAGS_LINK = "-static";
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# These are added *after* the command-line flags, so we'll
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# always optimise for size.
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NIX_CFLAGS_COMPILE =
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(if args ? NIX_CFLAGS_COMPILE then args.NIX_CFLAGS_COMPILE else "")
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+ " -Os -s";
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configureFlags =
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(if args ? configureFlags then args.configureFlags else "")
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+ " --disable-shared"; # brrr...
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NIX_GCC = runCommand "klibc-wrapper" {} ''
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ensureDir $out/bin
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ln -s ${klibc}/bin/klcc $out/bin/gcc
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ln -s ${klibc}/bin/klcc $out/bin/cc
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ensureDir $out/nix-support
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echo 'PATH=$PATH:${stdenv.gcc.binutils}/bin' > $out/nix-support/setup-hook
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'';
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});
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isKlibc = true;
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isStatic = true;
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} // {inherit fetchurl;};
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# Return a modified stdenv that tries to build statically linked
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# binaries.
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makeStaticBinaries = stdenv: stdenv //
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{ mkDerivation = args: stdenv.mkDerivation (args // {
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NIX_CFLAGS_LINK = "-static";
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configureFlags =
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(if args ? configureFlags then args.configureFlags else "")
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+ " --disable-shared"; # brrr...
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});
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isStatic = true;
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} // {inherit fetchurl;};
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/* Modify a stdenv so that the specified attributes are added to
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every derivation returned by its mkDerivation function.
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Example:
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stdenvNoOptimise =
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addAttrsToDerivation
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{ NIX_CFLAGS_COMPILE = "-O0"; }
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stdenv;
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*/
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addAttrsToDerivation = extraAttrs: stdenv: stdenv //
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{ mkDerivation = args: stdenv.mkDerivation (args // extraAttrs); };
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}
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