clang

unvendor

06/using-nix/2a4-gnugcc4-cpp.nix

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+{ fetchurl, mkDerivationStage2
+, stage1
+, static-gnumake, static-binutils, static-gnugcc4-c, intermediate-musl }:
+
+let
+  source-tarball-gcc = fetchurl {
+    # local = /downloads/gcc-4.7.4.tar.bz2;
+    url = "https://ftp.gnu.org/gnu/gcc/gcc-4.7.4/gcc-4.7.4.tar.bz2";
+    sha256 = "92e61c6dc3a0a449e62d72a38185fda550168a86702dea07125ebd3ec3996282";
+  };
+  source-tarball-gmp = fetchurl {
+    # local = /downloads/gmp-4.3.2.tar.xz;
+    url = "https://gmplib.org/download/gmp/archive/gmp-4.3.2.tar.xz";
+    sha256 = "f69eff1bc3d15d4e59011d587c57462a8d3d32cf2378d32d30d008a42a863325";
+  };
+  source-tarball-mpfr = fetchurl {
+    # local = /downloads/mpfr-2.4.2.tar.xz;
+    url = "https://www.mpfr.org/mpfr-2.4.2/mpfr-2.4.2.tar.xz";
+    sha256 = "d7271bbfbc9ddf387d3919df8318cd7192c67b232919bfa1cb3202d07843da1b";
+  };
+  source-tarball-mpc = fetchurl {
+    # local = /downloads/mpc-0.8.1.tar.gz;
+    url = "http://www.multiprecision.org/downloads/mpc-0.8.1.tar.gz";
+    sha256 = "e664603757251fd8a352848276497a4c79b7f8b21fd8aedd5cc0598a38fee3e4";
+  };
+in
+  mkDerivationStage2 {
+    name = "bootstrap-2a4-gnugcc4-cpp";
+    buildInputPaths = [
+      "${stage1.protobusybox}/bin"
+      "${static-gnumake}/bin"
+      "${static-binutils}/bin"
+      "${static-gnugcc4-c}/bin"
+    ];
+    script = ''
+        mkdir build-dir; cd build-dir
+      # alias ash to sh:
+        mkdir aliases; ln -s ${stage1.protobusybox}/bin/ash aliases/sh
+        export PATH="$(pwd)/aliases:$PATH"
+      # create wrappers that make previous GNU GCC target new musl:
+        SYSROOT=${intermediate-musl}
+        export _SYSROOT="--sysroot $SYSROOT"
+        export _LDFLAG="--dynamic-linker=$SYSROOT/lib/libc.so"
+        export _NEWINC="-I$SYSROOT/include"
+        export _REALCC="-I$SYSROOT/include"
+        mkdir wrappers
+        echo '#!${stage1.protobusybox}/bin/ash' > wrappers/cc
+        echo '#!${stage1.protobusybox}/bin/ash' > wrappers/cpp
+        echo '#!${stage1.protobusybox}/bin/ash' > wrappers/ld
+        echo 'exec gcc $_SYSROOT -Wl,$_LDFLAG "$@"' >> wrappers/cc
+        echo 'exec ${static-gnugcc4-c}/bin/cpp $_NEWINC "$@"' \
+          >> wrappers/cpp
+        echo 'exec ${static-binutils}/bin/ld $_LDFLAG "$@"' \
+          >> wrappers/ld
+        chmod +x wrappers/cc wrappers/cpp wrappers/ld
+        export PATH="$(pwd)/wrappers:$PATH"
+      # unpack:
+        unpack ${source-tarball-gcc}
+        mkdir mpfr mpc gmp
+        unpack ${source-tarball-mpfr} -C mpfr
+        unpack ${source-tarball-mpc} -C mpc
+        unpack ${source-tarball-gmp} -C gmp
+      # fixup:
+        sed -i 's|/bin/sh|${stage1.protobusybox}/bin/ash|' \
+          missing move-if-change mkdep mkinstalldirs symlink-tree \
+          gcc/genmultilib */*.sh gcc/exec-tool.in \
+          install-sh */install-sh
+        sed -i 's|^\(\s*\)sh |\1${stage1.protobusybox}/bin/ash |' \
+          Makefile* */Makefile*
+        sed -i "s|/lib64/ld-linux-x86-64.so.2|$SYSROOT/lib/libc.so|" \
+          gcc/config/i386/linux64.h
+        sed -i 's|"os/gnu-linux"|"os/generic"|' libstdc++-v3/configure.host
+        sed -i 's|LIBGCC2_DEBUG_CFLAGS = -g|LIBGCC2_DEBUG_CFLAGS = |' \
+          libgcc/Makefile.in
+        # see libtool's 74c8993c178a1386ea5e2363a01d919738402f30
+        sed -i 's/| \$NL2SP/| sort | $NL2SP/' ltmain.sh */ltmain.sh
+        sed -i 's|#define HAVE_HOST_CORE2 1||' mpfr/configure
+      # configure:
+        export ac_cv_func_strncmp_works=no
+        export ac_cv_func_alloca_works=no
+        export ac_cv_prog_make_make_set=no
+        export glibcxx_cv_random_tr1=no
+        ash configure \
+          cache_file=nonex \
+          CONFIG_SHELL='${stage1.protobusybox}/bin/ash' \
+          SHELL='${stage1.protobusybox}/bin/ash' \
+          CC=cc CPP=cpp LD=ld \
+          CFLAGS=-O2 CFLAGS_FOR_TARGET=-O2 \
+          --with-sysroot=$SYSROOT \
+          --with-native-system-header-dir=/include \
+          --with-build-time-tools=${static-binutils}/bin \
+          --prefix=$out \
+          --with-specs='%{!static:%x{-rpath=$out/lib64}}' \
+          --enable-languages=c,c++ \
+          --disable-bootstrap \
+          --disable-libquadmath --disable-decimal-float --disable-fixed-point \
+          --disable-lto \
+          --disable-libgomp \
+          --disable-multilib \
+          --disable-multiarch \
+          --disable-libmudflap \
+          --disable-libssp \
+          --disable-nls \
+          --disable-libitm \
+          --host x86_64-linux --build x86_64-linux
+      # build:
+        make -j $NPROC
+      # install:
+        make -j $NPROC install
+      # check for build path leaks:
+        ( ! grep -rF $(pwd) $out )
+    '';
+  }