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nixpkgs/pkgs/build-support/cc-wrapper/default.nix
John Ericson f6f40e3fe5 stdenv-setup and misc pkgs: Revert to space-deliminated propagated-* files 
We cannot switch to line-delimited yet, because certain Nix commands do
not read in the entire file, but just the first line.
2017-07-26 09:07:55 -04:00

391 lines
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# The Nixpkgs CC 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. So we use a wrapper
# script that sets up the right environment variables so that the
# compiler and the linker just "work".
{ name ? "", stdenv, nativeTools, noLibc ? false, nativeLibc, nativePrefix ? ""
, cc ? null, libc ? null, binutils ? null, coreutils ? null, shell ? stdenv.shell
, zlib ? null, extraPackages ? [], extraBuildCommands ? ""
, dyld ? null # TODO: should this be a setup-hook on dyld?
, isGNU ? false, isClang ? cc.isClang or false, gnugrep ? null
, buildPackages ? {}, hostPlatform, targetPlatform
, runCommand ? null
}:
with stdenv.lib;
assert nativeTools -> nativePrefix != "";
assert !nativeTools ->
cc != null && binutils != null && coreutils != null && gnugrep != null;
assert !(nativeLibc && noLibc);
assert (noLibc || nativeLibc) == (libc == null);
assert stdenv.targetPlatform != stdenv.hostPlatform -> runCommand != null;
# For ghdl (the vhdl language provider to gcc) we need zlib in the wrapper.
assert cc.langVhdl or false -> zlib != null;
let
inherit (stdenv) hostPlatform targetPlatform;
# Prefix for binaries. Customarily ends with a dash separator.
#
# TODO(@Ericson2314) Make unconditional, or optional but always true by
# default.
prefix = stdenv.lib.optionalString (targetPlatform != hostPlatform)
(targetPlatform.config + "-");
ccVersion = (builtins.parseDrvName cc.name).version;
ccName = (builtins.parseDrvName cc.name).name;
libc_bin = if libc == null then null else getBin libc;
libc_dev = if libc == null then null else getDev libc;
libc_lib = if libc == null then null else getLib libc;
cc_solib = getLib cc;
binutils_bin = if nativeTools then "" else getBin binutils;
# The wrapper scripts use 'cat' and 'grep', so we may need coreutils.
coreutils_bin = if nativeTools then "" else getBin coreutils;
default_cxx_stdlib_compile=optionalString (targetPlatform.isLinux && !(cc.isGNU or false))
"-isystem $(echo -n ${cc.gcc}/include/c++/*) -isystem $(echo -n ${cc.gcc}/include/c++/*)/$(${cc.gcc}/bin/gcc -dumpmachine)";
dashlessTarget = stdenv.lib.replaceStrings ["-"] ["_"] targetPlatform.config;
# TODO(@Ericson2314) Make unconditional
infixSalt = stdenv.lib.optionalString (targetPlatform != hostPlatform) dashlessTarget;
infixSalt_ = stdenv.lib.optionalString (targetPlatform != hostPlatform) (dashlessTarget + "_");
_infixSalt = stdenv.lib.optionalString (targetPlatform != hostPlatform) ("_" + dashlessTarget);
# We want to prefix all NIX_ flags with the target triple
preWrap = textFile:
# TODO: Do even when not cross on next mass-rebuild
# TODO: use @target_tripple@ for consistency
if targetPlatform == hostPlatform
then textFile
else runCommand "sed-nix-env-vars" {} (''
cp --no-preserve=mode ${textFile} $out
sed -i $out \
-e 's^NIX_^NIX_${infixSalt_}^g' \
-e 's^addCVars^addCVars${_infixSalt}^g' \
-e 's^\[ -z "\$crossConfig" \]^\[\[ "${builtins.toString (targetPlatform != hostPlatform)}" || -z "$crossConfig" \]\]^g'
# NIX_ things which we don't both use and define, we revert them
#asymmetric=$(
# for pre in "" "\\$"
# do
# grep -E -ho $pre'NIX_[a-zA-Z_]*' ./* | sed 's/\$//' | sort | uniq
# done | sort | uniq -c | sort -nr | sed -n 's/^1 NIX_//gp')
# hard-code for now
asymmetric=("CXXSTDLIB_COMPILE" "CC")
# The ([^a-zA-Z_]|$) bussiness is to ensure environment variables that
# begin with `NIX_CC` don't also get blacklisted.
for var in "''${asymmetric[@]}"
do
sed -i $out -E -e "s~NIX_${infixSalt_}$var([^a-zA-Z_]|$)~NIX_$var\1~g"
done
'');
# The dynamic linker has different names on different platforms. This is a
# shell glob that ought to match it.
dynamicLinker =
/**/ if libc == null then null
else if targetPlatform.system == "i686-linux" then "${libc_lib}/lib/ld-linux.so.2"
else if targetPlatform.system == "x86_64-linux" then "${libc_lib}/lib/ld-linux-x86-64.so.2"
# ARM with a wildcard, which can be "" or "-armhf".
else if targetPlatform.isArm32 then "${libc_lib}/lib/ld-linux*.so.3"
else if targetPlatform.system == "aarch64-linux" then "${libc_lib}/lib/ld-linux-aarch64.so.1"
else if targetPlatform.system == "powerpc-linux" then "${libc_lib}/lib/ld.so.1"
else if targetPlatform.system == "mips64el-linux" then "${libc_lib}/lib/ld.so.1"
else if targetPlatform.system == "x86_64-darwin" then "/usr/lib/dyld"
else if stdenv.lib.hasSuffix "pc-gnu" targetPlatform.config then "ld.so.1"
else null;
expand-response-params = if buildPackages.stdenv.cc or null != null && buildPackages.stdenv.cc != "/dev/null"
then buildPackages.stdenv.mkDerivation {
name = "expand-response-params";
src = ./expand-response-params.c;
buildCommand = ''
# Work around "stdenv-darwin-boot-2 is not allowed to refer to path /nix/store/...-expand-response-params.c"
cp "$src" expand-response-params.c
"$CC" -std=c99 -O3 -o "$out" expand-response-params.c
'';
} else "";
in
stdenv.mkDerivation {
name = prefix
+ (if name != "" then name else "${ccName}-wrapper")
+ (stdenv.lib.optionalString (cc != null && ccVersion != "") "-${ccVersion}");
preferLocalBuild = true;
inherit cc shell libc_bin libc_dev libc_lib binutils_bin coreutils_bin;
gnugrep_bin = if nativeTools then "" else gnugrep;
binPrefix = prefix;
passthru = {
inherit libc nativeTools nativeLibc nativePrefix isGNU isClang default_cxx_stdlib_compile
prefix infixSalt infixSalt_ _infixSalt;
emacsBufferSetup = pkgs: ''
; We should handle propagation here too
(mapc (lambda (arg)
(when (file-directory-p (concat arg "/include"))
(setenv "NIX_${infixSalt_}CFLAGS_COMPILE" (concat (getenv "NIX_${infixSalt_}CFLAGS_COMPILE") " -isystem " arg "/include")))
(when (file-directory-p (concat arg "/lib"))
(setenv "NIX_${infixSalt_}LDFLAGS" (concat (getenv "NIX_${infixSalt_}LDFLAGS") " -L" arg "/lib")))
(when (file-directory-p (concat arg "/lib64"))
(setenv "NIX_${infixSalt_}LDFLAGS" (concat (getenv "NIX_${infixSalt_}LDFLAGS") " -L" arg "/lib64")))) '(${concatStringsSep " " (map (pkg: "\"${pkg}\"") pkgs)}))
'';
};
buildCommand =
''
mkdir -p $out/bin $out/nix-support
wrap() {
local dst="$1"
local wrapper="$2"
export prog="$3"
substituteAll "$wrapper" "$out/bin/$dst"
chmod +x "$out/bin/$dst"
}
''
+ optionalString (libc != null) (''
if [[ -z ''${dynamicLinker+x} ]]; then
echo "Don't know the name of the dynamic linker for platform '${targetPlatform.config}', so guessing instead." >&2
dynamicLinker="${libc_lib}/lib/ld*.so.?"
fi
# Expand globs to fill array of options
dynamicLinker=($dynamicLinker)
case ''${#dynamicLinker[@]} in
0) echo "No dynamic linker found for platform '${targetPlatform.config}'." >&2;;
1) echo "Using dynamic linker: '$dynamicLinker'" >&2;;
*) echo "Multiple dynamic linkers found for platform '${targetPlatform.config}'." >&2;;
esac
if [ -n "$dynamicLinker" ]; then
echo $dynamicLinker > $out/nix-support/dynamic-linker
'' + (if targetPlatform.isDarwin then ''
printf "export LD_DYLD_PATH+=%q\n" "$dynamicLinker" >> $out/nix-support/setup-hook
'' else ''
if [ -e ${libc_lib}/lib/32/ld-linux.so.2 ]; then
echo ${libc_lib}/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
fi
ldflagsBefore=(-dynamic-linker "$dynamicLinker")
'') + ''
fi
# The dynamic linker is passed in `ldflagsBefore' to allow
# explicit overrides of the dynamic linker by callers to gcc/ld
# (the *last* value counts, so ours should come first).
printWords "''${ldflagsBefore[@]}" > $out/nix-support/libc-ldflags-before
'')
+ optionalString (libc != null) ''
# The "-B${libc_lib}/lib/" flag is a quick hack to force gcc to link
# against the crt1.o from our own glibc, rather than the one in
# /usr/lib. (This is only an issue when using an `impure'
# compiler/linker, i.e., one that searches /usr/lib and so on.)
#
# Unfortunately, setting -B appears to override the default search
# path. Thus, the gcc-specific "../includes-fixed" directory is
# now longer searched and glibc's <limits.h> header fails to
# compile, because it uses "#include_next <limits.h>" to find the
# limits.h file in ../includes-fixed. To remedy the problem,
# another -idirafter is necessary to add that directory again.
echo "-B${libc_lib}/lib/ -idirafter ${libc_dev}/include -idirafter ${cc}/lib/gcc/*/*/include-fixed" > $out/nix-support/libc-cflags
echo "-L${libc_lib}/lib" > $out/nix-support/libc-ldflags
echo "${libc_lib}" > $out/nix-support/orig-libc
echo "${libc_dev}" > $out/nix-support/orig-libc-dev
''
+ (if nativeTools then ''
ccPath="${if targetPlatform.isDarwin then cc else nativePrefix}/bin"
ldPath="${nativePrefix}/bin"
'' else ''
echo $cc > $out/nix-support/orig-cc
# GCC shows ${cc_solib}/lib in `gcc -print-search-dirs', but not
# ${cc_solib}/lib64 (even though it does actually search there...)..
# This confuses libtool. So add it to the compiler tool search
# path explicitly.
if [ -e "${cc_solib}/lib64" -a ! -L "${cc_solib}/lib64" ]; then
ccLDFlags+=" -L${cc_solib}/lib64"
ccCFlags+=" -B${cc_solib}/lib64"
fi
ccLDFlags+=" -L${cc_solib}/lib"
ccCFlags+=" -B${cc_solib}/lib"
${optionalString cc.langVhdl or false ''
ccLDFlags+=" -L${zlib.out}/lib"
''}
# Find the gcc libraries path (may work only without multilib).
${optionalString cc.langAda or false ''
basePath=`echo ${cc_solib}/lib/*/*/*`
ccCFlags+=" -B$basePath -I$basePath/adainclude"
gnatCFlags="-aI$basePath/adainclude -aO$basePath/adalib"
echo "$gnatCFlags" > $out/nix-support/gnat-cflags
''}
if [ -e $ccPath/clang ]; then
# Need files like crtbegin.o from gcc
# It's unclear if these will ever be provided by an LLVM project
ccCFlags="$ccCFlags -B$basePath"
ccCFlags="$ccCFlags -isystem$cc/lib/clang/$ccVersion/include"
fi
echo "$ccLDFlags" > $out/nix-support/cc-ldflags
echo "$ccCFlags" > $out/nix-support/cc-cflags
ccPath="${cc}/bin"
ldPath="${binutils_bin}/bin"
# Propagate the wrapped cc so that if you install the wrapper,
# you get tools like gcov, the manpages, etc. as well (including
# for binutils and Glibc).
printWords ${cc} ${cc.man or ""} ${binutils_bin} ${if libc == null then "" else libc_bin} > $out/nix-support/propagated-user-env-packages
printWords ${toString extraPackages} > $out/nix-support/propagated-native-build-inputs
''
+ optionalString (targetPlatform.isSunOS && nativePrefix != "") ''
# Solaris needs an additional ld wrapper.
ldPath="${nativePrefix}/bin"
exec="$ldPath/${prefix}ld"
wrap ld-solaris ${preWrap ./ld-solaris-wrapper.sh}
'')
+ ''
# Create a symlink to as (the assembler). This is useful when a
# cc-wrapper is installed in a user environment, as it ensures that
# the right assembler is called.
if [ -e $ldPath/${prefix}as ]; then
ln -s $ldPath/${prefix}as $out/bin/${prefix}as
fi
wrap ${prefix}ld ${preWrap ./ld-wrapper.sh} ''${ld:-$ldPath/${prefix}ld}
if [ -e ${binutils_bin}/bin/${prefix}ld.gold ]; then
wrap ${prefix}ld.gold ${preWrap ./ld-wrapper.sh} ${binutils_bin}/bin/${prefix}ld.gold
fi
if [ -e ${binutils_bin}/bin/ld.bfd ]; then
wrap ${prefix}ld.bfd ${preWrap ./ld-wrapper.sh} ${binutils_bin}/bin/${prefix}ld.bfd
fi
# We export environment variables pointing to the wrapped nonstandard
# cmds, lest some lousy configure script use those to guess compiler
# version.
export named_cc=${prefix}cc
export named_cxx=${prefix}c++
export default_cxx_stdlib_compile="${default_cxx_stdlib_compile}"
if [ -e $ccPath/${prefix}gcc ]; then
wrap ${prefix}gcc ${preWrap ./cc-wrapper.sh} $ccPath/${prefix}gcc
ln -s ${prefix}gcc $out/bin/${prefix}cc
export named_cc=${prefix}gcc
export named_cxx=${prefix}g++
elif [ -e $ccPath/clang ]; then
wrap ${prefix}clang ${preWrap ./cc-wrapper.sh} $ccPath/clang
ln -s ${prefix}clang $out/bin/${prefix}cc
export named_cc=${prefix}clang
export named_cxx=${prefix}clang++
fi
if [ -e $ccPath/${prefix}g++ ]; then
wrap ${prefix}g++ ${preWrap ./cc-wrapper.sh} $ccPath/${prefix}g++
ln -s ${prefix}g++ $out/bin/${prefix}c++
elif [ -e $ccPath/clang++ ]; then
wrap ${prefix}clang++ ${preWrap ./cc-wrapper.sh} $ccPath/clang++
ln -s ${prefix}clang++ $out/bin/${prefix}c++
fi
if [ -e $ccPath/cpp ]; then
wrap ${prefix}cpp ${preWrap ./cc-wrapper.sh} $ccPath/cpp
fi
''
+ optionalString cc.langFortran or false ''
wrap ${prefix}gfortran ${preWrap ./cc-wrapper.sh} $ccPath/${prefix}gfortran
ln -sv ${prefix}gfortran $out/bin/${prefix}g77
ln -sv ${prefix}gfortran $out/bin/${prefix}f77
''
+ optionalString cc.langJava or false ''
wrap ${prefix}gcj ${preWrap ./cc-wrapper.sh} $ccPath/${prefix}gcj
''
+ optionalString cc.langGo or false ''
wrap ${prefix}gccgo ${preWrap ./cc-wrapper.sh} $ccPath/${prefix}gccgo
''
+ optionalString cc.langAda or false ''
wrap ${prefix}gnatgcc ${preWrap ./cc-wrapper.sh} $ccPath/${prefix}gnatgcc
wrap ${prefix}gnatmake ${preWrap ./gnat-wrapper.sh} $ccPath/${prefix}gnatmake
wrap ${prefix}gnatbind ${preWrap ./gnat-wrapper.sh} $ccPath/${prefix}gnatbind
wrap ${prefix}gnatlink ${preWrap ./gnatlink-wrapper.sh} $ccPath/${prefix}gnatlink
''
+ optionalString cc.langVhdl or false ''
ln -s $ccPath/${prefix}ghdl $out/bin/${prefix}ghdl
''
+ ''
substituteAll ${preWrap ./setup-hook.sh} $out/nix-support/setup-hook.tmp
cat $out/nix-support/setup-hook.tmp >> $out/nix-support/setup-hook
rm $out/nix-support/setup-hook.tmp
# some linkers on some platforms don't support specific -z flags
hardening_unsupported_flags=""
if [[ "$($ldPath/${prefix}ld -z now 2>&1 || true)" =~ un(recognized|known)\ option ]]; then
hardening_unsupported_flags+=" bindnow"
fi
if [[ "$($ldPath/${prefix}ld -z relro 2>&1 || true)" =~ un(recognized|known)\ option ]]; then
hardening_unsupported_flags+=" relro"
fi
''
+ optionalString hostPlatform.isCygwin ''
hardening_unsupported_flags+=" pic"
''
+ ''
substituteAll ${preWrap ./add-flags.sh} $out/nix-support/add-flags.sh
substituteAll ${preWrap ./add-hardening.sh} $out/nix-support/add-hardening.sh
substituteAll ${preWrap ./utils.sh} $out/nix-support/utils.sh
''
+ extraBuildCommands;
inherit dynamicLinker expand-response-params;
expandResponseParams = expand-response-params; # for substitution in utils.sh
crossAttrs = {
shell = shell.crossDrv + shell.crossDrv.shellPath;
};
meta =
let cc_ = if cc != null then cc else {}; in
(if cc_ ? meta then removeAttrs cc.meta ["priority"] else {}) //
{ description =
stdenv.lib.attrByPath ["meta" "description"] "System C compiler" cc_
+ " (wrapper script)";
};
}
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