nixpkgs/pkgs/stdenv/adapters.nix
Lluís Batlle i Rossell 6f3630e128 Attention, people who care on the builders for native builds. In the stdenv
derivation, the "buildInputs" in every stdenv mkDerivation don't map now
directly to the environment
variable "buildInputs" in the builder, but "buildNativeInputs". So, the inputs
build by the native compiler.
When cross compiling, they will map to the environment variable "buildInputs"
(yes, now the same name), which means does to be built with the cross compiler.

I think I improved the naming of variables a bit. There was a big mess,
specially in the stdenv adapter for cross building, and also in the default
builder script.

I also tried to add proper manager of propagatedInputBuilds, these being
propagated considering the host or build origin of that input build (so, at the
end, being those propagatedInputBuilds being propagated properly to the native
or the cross compiler.


svn path=/nixpkgs/branches/stdenv-updates/; revision=18477
2009-11-19 23:05:11 +00:00

245 lines
8.7 KiB
Nix

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