forked from mirrors/nixpkgs
231 lines
8 KiB
Nix
231 lines
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 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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# Return a modified stdenv that adds a cross compiler to the
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# builds.
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makeStdenvCross = stdenv: cross: binutilsCross: gccCross: stdenv //
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{ mkDerivation = {name, buildInputs ? [], buildNativeInputs ? [],
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propagatedBuildInputs ? [], ...}@args: let
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# propagatedBuildInputs exists temporarily as another name for
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# propagatedHostInputs.
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getBuildDrv = drv : if (drv ? buildDrv) then drv.buildDrv else drv;
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buildInputsDrvs = map (getBuildDrv) buildNativeInputs;
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hostInputsDrvs = map (drv: drv.hostDrv) buildInputs;
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hostInputsDrvsAsBuildInputs = map (getBuildDrv) buildInputs;
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propagatedHostInputsDrvs = map (drv: drv.buildDrv) (propagatedBuildInputs);
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buildDrv = stdenv.mkDerivation args;
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hostDrv = if (cross == null) then buildDrv else
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stdenv.mkDerivation (args // {
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name = name + "-" + cross.config;
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buildInputs = buildInputsDrvs
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++ [ gccCross binutilsCross ];
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crossConfig = cross.config;
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});
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in buildDrv // {
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inherit hostDrv buildDrv;
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};
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} // { inherit cross; };
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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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/* Return a modified stdenv that perfoms the build under $out/.build
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instead of in $TMPDIR. Thus, the sources are kept available.
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This is useful for things like debugging or generation of
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dynamic analysis reports. */
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keepBuildTree = stdenv:
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addAttrsToDerivation
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{ prePhases = "moveBuildDir";
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moveBuildDir =
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''
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ensureDir $out/.build
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cd $out/.build
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'';
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} stdenv;
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cleanupBuildTree = stdenv:
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addAttrsToDerivation
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{ postPhases = "cleanupBuildDir";
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# Get rid of everything that isn't a gcno file or a C source
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# file. This also includes the gcda files; we're not
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# interested in coverage resulting from the package's own test
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# suite.
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cleanupBuildDir =
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''
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find $out/.build/ -type f -a ! \
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\( -name "*.c" -o -name "*.h" -o -name "*.gcno" \) \
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| xargs rm -f --
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'';
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} stdenv;
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/* Return a modified stdenv that builds packages with GCC's coverage
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instrumentation. The coverage note files (*.gcno) are stored in
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$out/.build, along with the source code of the package, to enable
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programs like lcov to produce pretty-printed reports.
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*/
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addCoverageInstrumentation = stdenv:
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addAttrsToDerivation
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{ NIX_CFLAGS_COMPILE = "-O0 --coverage";
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# This is an uberhack to prevent libtool from removing gcno
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# files. This has been fixed in libtool, but there are
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# packages out there with old ltmain.sh scripts.
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# See http://www.mail-archive.com/libtool@gnu.org/msg10725.html
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postUnpack =
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''
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for i in $(find -name ltmain.sh); do
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substituteInPlace $i --replace '*.$objext)' '*.$objext | *.gcno)'
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done
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'';
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}
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# Object files instrumented with coverage analysis write
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# runtime coverage data to <path>/<object>.gcda, where <path>
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# is the location where gcc originally created the object
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# file. That would be /tmp/nix-build-<something>, which will
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# be long gone by the time we run the program. Furthermore,
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# the <object>.gcno files created at compile time are also
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# written there. And to make nice coverage reports with lcov,
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# we need the source code. So we have to use the
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# `keepBuildTree' adapter as well.
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(cleanupBuildTree (keepBuildTree stdenv));
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/* Replace the meta.maintainers field of a derivation. This is useful
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when you want to fork to update some packages without disturbing other
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developers.
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e.g.: in all-packages.nix:
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# remove all maintainers.
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defaultStdenv = replaceMaintainersField allStdenvs.stdenv pkgs [];
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*/
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replaceMaintainersField = stdenv: pkgs: maintainers: stdenv //
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{ mkDerivation = args:
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pkgs.lib.recursiveUpdate
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(stdenv.mkDerivation args)
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{ meta.maintainers = maintainers; };
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};
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}
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