diff options
Diffstat (limited to 'pkgs/build-support/cc-wrapper/default.nix')
| -rw-r--r-- | pkgs/build-support/cc-wrapper/default.nix | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix new file mode 100644 index 00000000000..c26cac24b2f --- /dev/null +++ b/pkgs/build-support/cc-wrapper/default.nix @@ -0,0 +1,275 @@ +# 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, nativeLibc, nativePrefix ? "" +, cc ? null, libc ? null, binutils ? null, coreutils ? null, shell ? stdenv.shell +, zlib ? null, extraPackages ? [] +, dyld ? null # TODO: should this be a setup-hook on dyld? +, setupHook ? ./setup-hook.sh +}: + +with stdenv.lib; + +assert nativeTools -> nativePrefix != ""; +assert !nativeTools -> cc != null && binutils != null && coreutils != null; +assert !nativeLibc -> libc != null; + +# For ghdl (the vhdl language provider to gcc) we need zlib in the wrapper. +assert cc.langVhdl or false -> zlib != null; + +let + + ccVersion = (builtins.parseDrvName cc.name).version; + ccName = (builtins.parseDrvName cc.name).name; + + libc_bin = if nativeLibc then null else libc.bin or libc; + libc_dev = if nativeLibc then null else libc.dev or libc; + binutils_bin = if nativeTools then null else binutils.bin or binutils; + # The wrapper scripts use 'cat', so we may need coreutils. + coreutils_bin = if nativeTools then null else coreutils.bin or coreutils; +in + +stdenv.mkDerivation { + name = + (if name != "" then name else ccName + "-wrapper") + + (if cc != null && ccVersion != "" then "-" + ccVersion else ""); + + preferLocalBuild = true; + + inherit cc shell libc_bin libc_dev binutils_bin coreutils_bin; + + passthru = { inherit libc nativeTools nativeLibc nativePrefix; }; + + 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 (!nativeLibc) (if (!stdenv.isDarwin) then '' + dynamicLinker="${libc}/lib/$dynamicLinker" + echo $dynamicLinker > $out/nix-support/dynamic-linker + + if [ -e ${libc}/lib/32/ld-linux.so.2 ]; then + echo ${libc}/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32 + 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). + echo "-dynamic-linker" $dynamicLinker > $out/nix-support/libc-ldflags-before + '' else '' + echo $dynamicLinker > $out/nix-support/dynamic-linker + + echo "export LD_DYLD_PATH=\"$dynamicLinker\"" >> $out/nix-support/setup-hook + '') + + + optionalString (!nativeLibc) '' + # The "-B$libc/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/ -idirafter ${libc_dev}/include -idirafter $cc/lib/gcc/*/*/include-fixed" > $out/nix-support/libc-cflags + + echo "-L${libc}/lib" > $out/nix-support/libc-ldflags + + echo "${libc}" > $out/nix-support/orig-libc + '' + + + (if nativeTools then '' + ccPath="${if stdenv.isDarwin then cc else nativePrefix}/bin" + ldPath="${nativePrefix}/bin" + '' else '' + echo $cc > $out/nix-support/orig-cc + + # GCC shows $cc/lib in `gcc -print-search-dirs', but not + # $cc/lib64 (even though it does actually search there...).. + # This confuses libtool. So add it to the compiler tool search + # path explicitly. + if [ -e "$cc/lib64" -a ! -L "$cc/lib64" ]; then + ccLDFlags+=" -L$cc/lib64" + ccCFlags+=" -B$cc/lib64" + fi + ccLDFlags+=" -L$cc/lib" + + ${optionalString cc.langVhdl or false '' + ccLDFlags+=" -L${zlib}/lib" + ''} + + # Find the gcc libraries path (may work only without multilib). + ${optionalString cc.langAda or false '' + basePath=`echo $cc/lib/*/*/*` + ccCFlags+=" -B$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). + echo ${cc} ${binutils_bin} ${libc_bin} > $out/nix-support/propagated-user-env-packages + + echo ${toString extraPackages} > $out/nix-support/propagated-native-build-inputs + '' + + + optionalString (stdenv.isSunOS && nativePrefix != "") '' + # Solaris needs an additional ld wrapper. + ldPath="${nativePrefix}/bin" + ld="$out/bin/ld-solaris" + wrap ld-solaris ${./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/as ]; then + ln -s $ldPath/as $out/bin/as + fi + + wrap ld ${./ld-wrapper.sh} ''${ld:-$ldPath/ld} + + if [ -e ${binutils_bin}/bin/ld.gold ]; then + wrap ld.gold ${./ld-wrapper.sh} ${binutils_bin}/bin/ld.gold + fi + + if [ -e ${binutils_bin}/bin/ld.bfd ]; then + wrap ld.bfd ${./ld-wrapper.sh} ${binutils_bin}/bin/ld.bfd + fi + + export real_cc=cc + export real_cxx=c++ + export default_cxx_stdlib_compile="${ + if stdenv.isLinux && !(cc.isGNU or false) + then "-isystem $(echo -n ${cc.gcc}/include/c++/*) -isystem $(echo -n ${cc.gcc}/include/c++/*)/$(${cc.gcc}/bin/gcc -dumpmachine)" + else "" + }" + + if [ -e $ccPath/gcc ]; then + wrap gcc ${./cc-wrapper.sh} $ccPath/gcc + ln -s gcc $out/bin/cc + export real_cc=gcc + export real_cxx=g++ + elif [ -e $ccPath/clang ]; then + wrap clang ${./cc-wrapper.sh} $ccPath/clang + ln -s clang $out/bin/cc + export real_cc=clang + export real_cxx=clang++ + fi + + if [ -e $ccPath/g++ ]; then + wrap g++ ${./cc-wrapper.sh} $ccPath/g++ + ln -s g++ $out/bin/c++ + elif [ -e $ccPath/clang++ ]; then + wrap clang++ ${./cc-wrapper.sh} $ccPath/clang++ + ln -s clang++ $out/bin/c++ + fi + + if [ -e $ccPath/cpp ]; then + wrap cpp ${./cc-wrapper.sh} $ccPath/cpp + fi + '' + + + optionalString cc.langFortran or false '' + wrap gfortran ${./cc-wrapper.sh} $ccPath/gfortran + ln -sv gfortran $out/bin/g77 + ln -sv gfortran $out/bin/f77 + '' + + + optionalString cc.langJava or false '' + wrap gcj ${./cc-wrapper.sh} $ccPath/gcj + '' + + + optionalString cc.langGo or false '' + wrap gccgo ${./cc-wrapper.sh} $ccPath/gccgo + '' + + + optionalString cc.langAda or false '' + wrap gnatgcc ${./cc-wrapper.sh} $ccPath/gnatgcc + wrap gnatmake ${./gnat-wrapper.sh} $ccPath/gnatmake + wrap gnatbind ${./gnat-wrapper.sh} $ccPath/gnatbind + wrap gnatlink ${./gnatlink-wrapper.sh} $ccPath/gnatlink + '' + + + optionalString cc.langVhdl or false '' + ln -s $ccPath/ghdl $out/bin/ghdl + '' + + + '' + substituteAll ${setupHook} $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 + + substituteAll ${./add-flags} $out/nix-support/add-flags.sh + cp -p ${./utils.sh} $out/nix-support/utils.sh + ''; + + # The dynamic linker has different names on different Linux platforms. + dynamicLinker = + if !nativeLibc then + (if stdenv.system == "i686-linux" then "ld-linux.so.2" else + if stdenv.system == "x86_64-linux" then "ld-linux-x86-64.so.2" else + # ARM with a wildcard, which can be "" or "-armhf". + if stdenv.isArm then "ld-linux*.so.3" else + if stdenv.system == "powerpc-linux" then "ld.so.1" else + if stdenv.system == "mips64el-linux" then "ld.so.1" else + if stdenv.system == "x86_64-darwin" then "${dyld}/lib/dyld" else + abort "Don't know the name of the dynamic linker for this platform.") + else ""; + + crossAttrs = { + shell = shell.crossDrv + shell.crossDrv.shellPath; + libc = stdenv.ccCross.libc; + coreutils = coreutils.crossDrv; + binutils = binutils.crossDrv; + cc = cc.crossDrv; + # + # This is not the best way to do this. I think the reference should be + # the style in the gcc-cross-wrapper, but to keep a stable stdenv now I + # do this sufficient if/else. + dynamicLinker = + (if stdenv.cross.arch == "arm" then "ld-linux.so.3" else + if stdenv.cross.arch == "mips" then "ld.so.1" else + if stdenv.lib.hasSuffix "pc-gnu" stdenv.cross.config then "ld.so.1" else + abort "don't know the name of the dynamic linker for this platform"); + }; + + 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)"; + }; +} |