bootstrap-tools-musl: WIP

pkgs/stdenv/linux/bootstrap-tools-musl/default.nix

···
   # Needed by the GCC wrapper.
   langC = true;
   langCC = true;
-  isGNU = true;
+  isGNU = false;
 }

pkgs/stdenv/linux/bootstrap-tools-musl/scripts/unpack-bootstrap-tools.sh

···
         ./patchelf --set-interpreter $LD_BINARY --set-rpath $out/lib --force-rpath "$i"
 done
 
-for i in $out/lib/librt-*.so $out/lib/libpcre*; do
+for i in $out/lib/libiconv*.so $out/lib/libpcre* $out/lib/libc.so; do
     if [ -L "$i" ]; then continue; fi
     echo patching "$i"
     $out/bin/patchelf --set-rpath $out/lib --force-rpath "$i"
 done
+
+export PATH=$out/bin
 
 # Fix the libc linker script.
-export PATH=$out/bin
-cat $out/lib/libc.so | sed "s|/nix/store/e*-[^/]*/|$out/|g" > $out/lib/libc.so.tmp
-mv $out/lib/libc.so.tmp $out/lib/libc.so
-cat $out/lib/libpthread.so | sed "s|/nix/store/e*-[^/]*/|$out/|g" > $out/lib/libpthread.so.tmp
-mv $out/lib/libpthread.so.tmp $out/lib/libpthread.so
+#cat $out/lib/libc.so | sed "s|/nix/store/e*-[^/]*/|$out/|g" > $out/lib/libc.so.tmp
+#mv $out/lib/libc.so.tmp $out/lib/libc.so
+#cat $out/lib/libpthread.so | sed "s|/nix/store/e*-[^/]*/|$out/|g" > $out/lib/libpthread.so.tmp
+#mv $out/lib/libpthread.so.tmp $out/lib/libpthread.so
 
 # Provide some additional symlinks.
 ln -s bash $out/bin/sh

pkgs/stdenv/linux/make-bootstrap-tools.nix

···
         set -x
         mkdir -p $out/bin $out/lib $out/libexec
 
-      '' + (if (targetPlatform.libc == "glibc") then ''
+      '' + (if (hostPlatform.libc == "glibc") then ''
         # Copy what we need of Glibc.
         cp -d ${libc.out}/lib/ld*.so* $out/lib
         cp -d ${libc.out}/lib/libc*.so* $out/lib
···
         find $out/include -name .install -exec rm {} \;
         find $out/include -name ..install.cmd -exec rm {} \;
         mv $out/include $out/include-glibc
-    '' else if (targetPlatform.libc == "musl") then ''
+    '' else if (hostPlatform.libc == "musl") then ''
         # Copy what we need from musl
         cp ${libc.out}/lib/* $out/lib
         cp -rL ${libc.dev}/include $out
···
         rm -rf $out/include/mtd $out/include/rdma $out/include/sound $out/include/video
         find $out/include -name .install -exec rm {} \;
         find $out/include -name ..install.cmd -exec rm {} \;
+        mv $out/include $out/include-libc
     '' else throw "unsupported libc for bootstrap tools")
     + ''
         # Copy coreutils, bash, etc.
···
         cp -d ${libmpc.out}/lib/libmpc*.so* $out/lib
         cp -d ${zlib.out}/lib/libz.so* $out/lib
         cp -d ${libelf}/lib/libelf.so* $out/lib
+      '' + lib.optionalString (hostPlatform.libc == "musl") ''
+        cp -d ${libiconv.out}/lib/libiconv*.so* $out/lib
 
       '' + lib.optionalString (hostPlatform != buildPlatform) ''
         # These needed for cross but not native tools because the stdenv
···
     bootstrapTools = runCommand "bootstrap-tools.tar.xz" {} "cp ${build}/on-server/bootstrap-tools.tar.xz $out";
   };
 
-  bootstrapTools = import ./bootstrap-tools {
-    inherit (hostPlatform) system;
-    inherit bootstrapFiles;
-  };
+  bootstrapTools = if (hostPlatform.libc == "glibc") then
+    import ./bootstrap-tools {
+      inherit (hostPlatform) system;
+      inherit bootstrapFiles;
+    }
+    else if (hostPlatform.libc == "musl") then
+    import ./bootstrap-tools-musl {
+      inherit (hostPlatform) system;
+      inherit bootstrapFiles;
+    }
+    else throw "unsupported libc";
 
   test = derivation {
     name = "test-bootstrap-tools";
···
       grep --version
       gcc --version
 
+    '' + lib.optionalString (hostPlatform.libc == "glibc") ''
       ldlinux=$(echo ${bootstrapTools}/lib/ld-linux*.so.?)
       export CPP="cpp -idirafter ${bootstrapTools}/include-glibc -B${bootstrapTools}"
       export CC="gcc -idirafter ${bootstrapTools}/include-glibc -B${bootstrapTools} -Wl,-dynamic-linker,$ldlinux -Wl,-rpath,${bootstrapTools}/lib"
       export CXX="g++ -idirafter ${bootstrapTools}/include-glibc -B${bootstrapTools} -Wl,-dynamic-linker,$ldlinux -Wl,-rpath,${bootstrapTools}/lib"
+    '' + lib.optionalString (hostPlatform.libc == "musl") ''
+      ldmusl=$(echo ${bootstrapTools}/lib/ld-musl*.so.?)
+      export CPP="cpp -idirafter ${bootstrapTools}/include-libc -B${bootstrapTools}"
+      export CC="gcc -idirafter ${bootstrapTools}/include-libc -B${bootstrapTools} -Wl,-dynamic-linker,$ldmusl -Wl,-rpath,${bootstrapTools}/lib"
+      export CXX="g++ -idirafter ${bootstrapTools}/include-libc -B${bootstrapTools} -Wl,-dynamic-linker,$ldmusl -Wl,-rpath,${bootstrapTools}/lib"
+    '' + ''
 
       echo '#include <stdio.h>' >> foo.c
       echo '#include <limits.h>' >> foo.c