Merge pull request #66613 from transumption-unstable/201908/rust-win32-cross

buildRustPackage: support cross-compilation to x86_64-pc-mingw32

pkgs/build-support/rust/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, cacert, git, cargo, rustc, fetchcargo, buildPackages }:
+{ stdenv, cacert, git, cargo, rustc, fetchcargo, buildPackages, windows }:
 
 { name ? "${args.pname}-${args.version}"
 , cargoSha256 ? "unset"
@@ -41,18 +41,26 @@ let
       cargoDepsCopy="$sourceRoot/${cargoVendorDir}"
     '';
 
+  hostConfig = stdenv.hostPlatform.config;
+
+  rustHostConfig = {
+    "x86_64-pc-mingw32" = "x86_64-pc-windows-gnu";
+  }."${hostConfig}" or hostConfig;
+
   ccForBuild="${buildPackages.stdenv.cc}/bin/${buildPackages.stdenv.cc.targetPrefix}cc";
   cxxForBuild="${buildPackages.stdenv.cc}/bin/${buildPackages.stdenv.cc.targetPrefix}c++";
   ccForHost="${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc";
   cxxForHost="${stdenv.cc}/bin/${stdenv.cc.targetPrefix}c++";
-  releaseDir = "target/${stdenv.hostPlatform.config}/${buildType}";
-in stdenv.mkDerivation (args // {
+  releaseDir = "target/${rustHostConfig}/${buildType}";
+in
+
+stdenv.mkDerivation (args // {
   inherit cargoDeps;
 
   patchRegistryDeps = ./patch-registry-deps;
 
-  nativeBuildInputs = [ cargo rustc git cacert ] ++ nativeBuildInputs;
-  inherit buildInputs;
+  nativeBuildInputs = nativeBuildInputs ++ [ cacert git cargo rustc ];
+  buildInputs = buildInputs ++ stdenv.lib.optional stdenv.hostPlatform.isMinGW windows.pthreads;
 
   patches = cargoPatches ++ patches;
 
@@ -84,7 +92,7 @@ in stdenv.mkDerivation (args // {
     [target."${stdenv.buildPlatform.config}"]
     "linker" = "${ccForBuild}"
     ${stdenv.lib.optionalString (stdenv.buildPlatform.config != stdenv.hostPlatform.config) ''
-    [target."${stdenv.hostPlatform.config}"]
+    [target."${rustHostConfig}"]
     "linker" = "${ccForHost}"
     ''}
     EOF
@@ -104,7 +112,7 @@ in stdenv.mkDerivation (args // {
       "CXX_${stdenv.hostPlatform.config}"="${cxxForHost}" \
       cargo build \
         ${stdenv.lib.optionalString (buildType == "release") "--release"} \
-        --target ${stdenv.hostPlatform.config} \
+        --target ${rustHostConfig} \
         --frozen ${concatStringsSep " " cargoBuildFlags}
     )
 

pkgs/os-specific/windows/pthread-w32/default.nix

@@ -1,61 +1,29 @@
-{ fetchurl, stdenv, mingwrt }:
+{ stdenv, fetchzip }:
 
-# This file is tweaked for cross-compilation only.
-assert stdenv.hostPlatform != stdenv.buildPlatform;
+stdenv.mkDerivation rec {
+  name = "pthreads-w32-${version}";
+  version = "2.9.1";
 
-stdenv.mkDerivation {
-  name = "pthread-w32-1.10.0";
-
-  src = fetchurl {
-    url = "ftp://sourceware.org/pub/pthreads-win32/pthreads-w32-1-10-0-release.tar.gz";
-    sha256 = "1vllxxfa9a7mssb1x98a2r736vsv5ll3sjizbr7a8hw8j9p18j7n";
+  src = fetchzip {
+    url = "https://sourceware.org/pub/pthreads-win32/pthreads-w32-2-9-1-release.tar.gz";
+    sha256 = "1s8iny7g06z289ahdj0kzaxj0cd3wvjbd8j3bh9xlg7g444lhy9w";
   };
 
-  configurePhase =
-    '' sed -i GNUmakefile \
-           -e 's/CC=gcc/CC=i686-pc-mingw32-gcc/g ;
-               s/windres/i686-pc-mingw32-windres/g ;
-               s/dlltool/i686-pc-mingw32-dlltool/g'
-    '';
+  makeFlags = [ "CROSS=${stdenv.cc.targetPrefix}" "GC-static" ];
 
-  buildInputs = [ mingwrt ];
+  installPhase = ''
+    runHook preInstall
 
-  buildPhase = "make GC";        # to build the GNU C dll with C cleanup code
+    install -D libpthreadGC2.a $out/lib/libpthread.a
 
-  installPhase =
-    '' mkdir -p "$out" "$out/include" "$out/lib"
-       cp -v *pthread*{dll,a} "$out/lib"
-       cp -v pthread.h semaphore.h sched.h "$out/include"
-    '';
+    runHook postInstall
+  '';
 
-  postFixup =
-    # By default `mingw_headers' is propagated.  Prevent that, because
-    # otherwise MinGW headers appear twice in `-I', and thus the
-    # "#include_next <float.h>" in MinGW's <float.h> picks up itself instead
-    # of picking up GCC's (hence, FLT_RADIX is left undefined, for instance.)
-    '' rm -f "$out/nix-support/propagated-build-inputs"
-    '';
-
-  meta = {
-    description = "POSIX threads for Woe32";
-
-    longDescription =
-      '' The POSIX 1003.1-2001 standard defines an application programming
-         interface (API) for writing multithreaded applications.  This
-         interface is known more commonly as pthreads.  A good number of
-         modern operating systems include a threading library of some kind:
-         Solaris (UI) threads, Win32 threads, DCE threads, DECthreads, or any
-         of the draft revisions of the pthreads standard.  The trend is that
-         most of these systems are slowly adopting the pthreads standard API,
-         with application developers following suit to reduce porting woes.
-
-         Woe32 does not, and is unlikely to ever, support pthreads natively.
-         This project seeks to provide a freely available and high-quality
-         solution to this problem.
-      '';
-
-    homepage = http://sourceware.org/pthreads-win32/;
-
-    license = stdenv.lib.licenses.lgpl21Plus;
+  meta = with stdenv.lib; {
+    description = "POSIX threads library for Windows";
+    homepage = "https://sourceware.org/pthreads-win32";
+    license = licenses.lgpl21Plus;
+    maintainers = with maintainers; [ yegortimoshenko ];
+    platforms = platforms.windows;
   };
 }