make it all work

.gitignore

@@ -1 +1,2 @@
 hello*
+tmp

pkgs/hare.nix

@@ -3,17 +3,14 @@
   lib,
   makeWrapper,
   scdoc,
-  substituteAll,
   qbe,
   harec,
   binutils-unwrapped,
   tzdata,
   python3,
-  writeScript,
   rustc,
 }:
 let
-  platform = lib.toLower stdenv.hostPlatform.uname.system;
   arch = stdenv.hostPlatform.uname.processor;
   qbePlatform = {
     x86_64 = "amd64_apple";
@@ -21,7 +18,7 @@ let
   }.${arch};
   hareAs = ./hare-as.py;
   hareLd = stdenv.mkDerivation (finalAttrs: {
-    pname = "rust-ld";
+    pname = "hare-ld";
     version = "1.0";
     src = [ ./ld.rs ];
     buildInputs = [ rustc ];
@@ -31,11 +28,33 @@ let
       done
     '';
     buildPhase = ''
-      rustc -o rust-ld.bin $src
+      rustc -o hare-ld.bin ld.rs
     '';
     installPhase = ''
       mkdir -p $out/bin
-      cp rust-ld.bin $out/bin/rust-ld
+      cp hare-ld.bin $out/bin/hare-ld
+    '';
+  });
+  hareCc = stdenv.mkDerivation (finalAttrs: {
+    pname = "hare-cc";
+    version = "1.0";
+    src = [ ./ld.rs ];
+    buildInputs = [ rustc ];
+    unpackPhase = ''
+      for srcFile in $src; do
+        cp $srcFile $(stripHash $srcFile)
+      done
+    '';
+    buildPhase = ''
+      sed -i \
+        -e 's/"ld"/"cc"/g' \
+        -e '11 a let mut args = vec![];' \
+        ld.rs
+      rustc -o hare-cc.bin ld.rs
+    '';
+    installPhase = ''
+      mkdir -p $out/bin
+      cp hare-cc.bin $out/bin/hare-cc
     '';
   });
 in
@@ -72,9 +91,9 @@ stdenv.mkDerivation  (finalAttrs: {
     "ARCH=${arch}"
     "VERSION=${finalAttrs.version}-nixpkgs"
     "QBEFLAGS=-t${qbePlatform}"
-    "CC=${stdenv.cc.targetPrefix}cc"
+    "CC=${hareCc}/bin/hare-cc"
     "AS=${hareAs}"
-    "LD=${hareLd}/bin/rust-ld"
+    "LD=${hareLd}/bin/hare-ld"
     # Strip the variable of an empty $(SRCDIR)/hare/third-party, since nix does
     # not follow the FHS.
     "HAREPATH=$(SRCDIR)/hare/stdlib"
@@ -90,8 +109,9 @@ stdenv.mkDerivation  (finalAttrs: {
   postFixup = ''
     wrapProgram $out/bin/hare \
       --prefix PATH : ${lib.makeBinPath [harec qbe]} \
-      --set LD ${hareLd}/bin/rust-ld \
+      --set CC ${hareCc}/bin/hare-cc \
-      --set AS ${hareAs}
+      --set AS ${hareAs} \
+      --set LD ${hareLd}/bin/hare-ld
   '';
 
   setupHook = ./setup-hook.sh;

pkgs/ld.rs

@@ -19,6 +19,7 @@ fn main() {
                 _ = argv.remove(0);
             }
             "--gc-sections" => {}
+            "-Wl,--gc-sections" | "-Wl,--no-gc-sections" => {}
             _ if arg.starts_with("-T") => {}
             _ if arg.starts_with("-z") => {}
             _ if arg.starts_with("--script=") => {}