gcc: Build MinGW stage two with threading library

Currently this is set up to be mcfgthreads, but it could be something
else instead.

13 files changed, 130 insertions, 28 deletions

diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index e8892e17b71..eee2c1a97a8 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -23,6 +23,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -47,10 +48,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "4.8.5";
+let majorVersion = "4";
+    version = "${majorVersion}.8.5";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -171,6 +176,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   preConfigure = import ../common/pre-configure.nix {
     inherit (stdenv) lib;
     inherit version hostPlatform langJava langGo;
@@ -253,7 +260,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/development/compilers/gcc/4.9/default.nix b/pkgs/development/compilers/gcc/4.9/default.nix
index 4f6d32b3317..b4ac68be1a3 100644
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@@ -23,6 +23,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -47,10 +48,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "4.9.4";
+let majorVersion = "4";
+    version = "${majorVersion}.9.4";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -177,6 +182,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   preConfigure = import ../common/pre-configure.nix {
     inherit (stdenv) lib;
     inherit version hostPlatform langJava langGo;
@@ -259,7 +266,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/development/compilers/gcc/5/default.nix b/pkgs/development/compilers/gcc/5/default.nix
index 3c8cdde8103..cb327864f6e 100644
--- a/pkgs/development/compilers/gcc/5/default.nix
+++ b/pkgs/development/compilers/gcc/5/default.nix
@@ -23,6 +23,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -45,10 +46,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "5.5.0";
+let majorVersion = "5";
+    version = "${majorVersion}.5.0";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -61,6 +66,10 @@ let version = "5.5.0";
       ++ optional stdenv.hostPlatform.isMusl (fetchpatch {
         url = https://raw.githubusercontent.com/richfelker/musl-cross-make/e84b1bd1fc12a3def33111ca6df522cd6e5ec361/patches/gcc-5.3.0/0001-musl.diff;
         sha256 = "0pppbf8myi2kjhm3z3479ihn1cm60kycfv60gj8yy1bs0pl1qcfm";
+      })
+      ++ optional (!crossStageStatic && targetPlatform.isMinGW) (fetchpatch {
+        url = "https://raw.githubusercontent.com/lhmouse/MINGW-packages/${import ../common/mfcgthreads-patches-repo.nix}/mingw-w64-gcc-git/9000-gcc-${majorVersion}-branch-Added-mcf-thread-model-support-from-mcfgthread.patch";
+        sha256 = "074bl5n27d1ksa31pvzj4vd8xd46r118k0w94gdv3s1vydg7mah0";
       });
 
     javaEcj = fetchurl {
@@ -183,6 +192,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   NIX_LDFLAGS = stdenv.lib.optionalString  hostPlatform.isSunOS "-lm -ldl";
 
   preConfigure = import ../common/pre-configure.nix {
@@ -266,7 +277,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index 82cec33756d..2cecc5bbaa0 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, targetPackages, fetchurl, noSysDirs
+{ stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
 , langObjC ? stdenv.targetPlatform.isDarwin
 , langObjCpp ? stdenv.targetPlatform.isDarwin
@@ -23,6 +23,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -45,10 +46,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "6.5.0";
+let majorVersion = "6";
+    version = "${majorVersion}.5.0";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -58,7 +63,10 @@ let version = "6.5.0";
       ++ optional noSysDirs ../no-sys-dirs.patch
       ++ optional langFortran ../gfortran-driving.patch
       ++ optional (targetPlatform.libc == "musl") ../libgomp-dont-force-initial-exec.patch
-      ;
+      ++ optional (!crossStageStatic && targetPlatform.isMinGW) (fetchpatch {
+        url = "https://raw.githubusercontent.com/lhmouse/MINGW-packages/${import ../common/mfcgthreads-patches-repo.nix}/mingw-w64-gcc-git/9000-gcc-${majorVersion}-branch-Added-mcf-thread-model-support-from-mcfgthread.patch";
+        sha256 = "1c449jgm1vx9g4kv82bxmvlgrwb8f6kwkl0gqmjlmhf7f4hjy2nr";
+      });
 
     javaEcj = fetchurl {
       # The `$(top_srcdir)/ecj.jar' file is automatically picked up at
@@ -185,6 +193,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   NIX_LDFLAGS = stdenv.lib.optionalString  hostPlatform.isSunOS "-lm -ldl";
 
   preConfigure = import ../common/pre-configure.nix {
@@ -268,7 +278,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/development/compilers/gcc/7/default.nix b/pkgs/development/compilers/gcc/7/default.nix
index c500bb477a2..c1592dbcb9b 100644
--- a/pkgs/development/compilers/gcc/7/default.nix
+++ b/pkgs/development/compilers/gcc/7/default.nix
@@ -16,6 +16,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -34,10 +35,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "7.4.0";
+let majorVersion = "7";
+    version = "${majorVersion}.4.0";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -58,7 +63,11 @@ let version = "7.4.0";
       })
       ++ optional langFortran ../gfortran-driving.patch
       ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch
-      ++ optional (targetPlatform.libc == "musl") ../libgomp-dont-force-initial-exec.patch;
+      ++ optional (targetPlatform.libc == "musl") ../libgomp-dont-force-initial-exec.patch
+      ++ optional (!crossStageStatic && targetPlatform.isMinGW) (fetchpatch {
+        url = "https://raw.githubusercontent.com/lhmouse/MINGW-packages/${import ../common/mfcgthreads-patches-repo.nix}/mingw-w64-gcc-git/9000-gcc-${majorVersion}-branch-Added-mcf-thread-model-support-from-mcfgthread.patch";
+        sha256 = "1nyjnshpq5gbcbbpfv27hy4ajvycmgkpiabkjlxnnrnq1d99k1ay";
+      });
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";
@@ -160,6 +169,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   NIX_CFLAGS_COMPILE = stdenv.lib.optionalString (stdenv.cc.isClang && langFortran) "-Wno-unused-command-line-argument";
   NIX_LDFLAGS = stdenv.lib.optionalString  hostPlatform.isSunOS "-lm -ldl";
 
@@ -232,7 +243,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/development/compilers/gcc/8/default.nix b/pkgs/development/compilers/gcc/8/default.nix
index 6ce10a78427..2f222a8bc94 100644
--- a/pkgs/development/compilers/gcc/8/default.nix
+++ b/pkgs/development/compilers/gcc/8/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, targetPackages, fetchurl, noSysDirs
+{ stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
 , langObjC ? stdenv.targetPlatform.isDarwin
 , langObjCpp ? stdenv.targetPlatform.isDarwin
@@ -16,6 +16,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -34,10 +35,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "8.3.0";
+let majorVersion = "8";
+    version = "${majorVersion}.3.0";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -50,7 +55,11 @@ let version = "8.3.0";
       }) */
       ++ optional langFortran ../gfortran-driving.patch
       ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch
-      ++ optional (targetPlatform.libc == "musl") ../libgomp-dont-force-initial-exec.patch;
+      ++ optional (targetPlatform.libc == "musl") ../libgomp-dont-force-initial-exec.patch
+      ++ optional (!crossStageStatic && targetPlatform.isMinGW) (fetchpatch {
+        url = "https://raw.githubusercontent.com/lhmouse/MINGW-packages/${import ../common/mfcgthreads-patches-repo.nix}/mingw-w64-gcc-git/9000-gcc-${majorVersion}-branch-Added-mcf-thread-model-support-from-mcfgthread.patch";
+        sha256 = "1in5kvcknlpi9z1vvjw6jfmwy8k12zvbqlqfnq84qpm99r0rh00a";
+      });
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";
@@ -147,6 +156,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   NIX_LDFLAGS = stdenv.lib.optionalString  hostPlatform.isSunOS "-lm -ldl";
 
   preConfigure = import ../common/pre-configure.nix {
@@ -214,7 +225,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/development/compilers/gcc/9/default.nix b/pkgs/development/compilers/gcc/9/default.nix
index 0e78cffdef2..1fdba1baa29 100644
--- a/pkgs/development/compilers/gcc/9/default.nix
+++ b/pkgs/development/compilers/gcc/9/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, targetPackages, fetchurl, noSysDirs
+{ stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
 , langObjC ? stdenv.targetPlatform.isDarwin
 , langObjCpp ? stdenv.targetPlatform.isDarwin
@@ -16,6 +16,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -34,10 +35,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "9.2.0";
+let majorVersion = "9";
+    version = "${majorVersion}.2.0";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -49,7 +54,11 @@ let version = "9.2.0";
         sha256 = ""; # TODO: uncomment and check hash when available.
       }) */
       ++ optional langFortran ../gfortran-driving.patch
-      ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch;
+      ++ optional (targetPlatform.libc == "musl" && targetPlatform.isPower) ../ppc-musl.patch
+      ++ optional (!crossStageStatic && targetPlatform.isMinGW) (fetchpatch {
+        url = "https://raw.githubusercontent.com/lhmouse/MINGW-packages/${import ../common/mfcgthreads-patches-repo.nix}/mingw-w64-gcc-git/9000-gcc-${majorVersion}-branch-Added-mcf-thread-model-support-from-mcfgthread.patch";
+        sha256 = "1in5kvcknlpi9z1vvjw6jfmwy8k12zvbqlqfnq84qpm99r0rh00a";
+      });
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";
@@ -146,6 +155,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   NIX_LDFLAGS = stdenv.lib.optionalString  hostPlatform.isSunOS "-lm -ldl";
 
   preConfigure = import ../common/pre-configure.nix {
@@ -213,7 +224,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/development/compilers/gcc/common/configure-flags.nix b/pkgs/development/compilers/gcc/common/configure-flags.nix
index a0c9941e3c6..96026a2d932 100644
--- a/pkgs/development/compilers/gcc/common/configure-flags.nix
+++ b/pkgs/development/compilers/gcc/common/configure-flags.nix
@@ -62,7 +62,7 @@ let
       "--enable-__cxa_atexit"
       "--enable-long-long"
       "--enable-threads=${if targetPlatform.isUnix then "posix"
-                          else if targetPlatform.isWindows then "win32"
+                          else if targetPlatform.isWindows then "mcf"
                           else "single"}"
       "--enable-nls"
       "--disable-decimal-float" # No final libdecnumber (it may work only in 386)
diff --git a/pkgs/development/compilers/gcc/common/extra-target-flags.nix b/pkgs/development/compilers/gcc/common/extra-target-flags.nix
index 1c2fad8fbc5..bce9a8d4738 100644
--- a/pkgs/development/compilers/gcc/common/extra-target-flags.nix
+++ b/pkgs/development/compilers/gcc/common/extra-target-flags.nix
@@ -1,4 +1,4 @@
-{ stdenv, crossStageStatic, libcCross }:
+{ stdenv, crossStageStatic, libcCross, threadsCross }:
 
 let
   inherit (stdenv) lib hostPlatform targetPlatform;
@@ -12,6 +12,7 @@ in
         "-B${lib.getLib dep}${dep.libdir or "/lib"}"
       ]);
     in mkFlags libcCross
+    ++ lib.optionals (!crossStageStatic) (mkFlags threadsCross)
     ;
 
   EXTRA_TARGET_LDFLAGS = let
@@ -24,5 +25,6 @@ in
           "-Wl,-rpath-link,${lib.getLib dep}${dep.libdir or "/lib"}"
       ]));
     in mkFlags libcCross
+    ++ lib.optionals (!crossStageStatic) (mkFlags threadsCross)
     ;
 }
diff --git a/pkgs/development/compilers/gcc/common/mfcgthreads-patches-repo.nix b/pkgs/development/compilers/gcc/common/mfcgthreads-patches-repo.nix
new file mode 100644
index 00000000000..f8822c6dba0
--- /dev/null
+++ b/pkgs/development/compilers/gcc/common/mfcgthreads-patches-repo.nix
@@ -0,0 +1 @@
+"740f233da00c4fb5bcc225b2e29768824bcecc58"
diff --git a/pkgs/development/compilers/gcc/snapshot/default.nix b/pkgs/development/compilers/gcc/snapshot/default.nix
index f431df03549..0519f04629e 100644
--- a/pkgs/development/compilers/gcc/snapshot/default.nix
+++ b/pkgs/development/compilers/gcc/snapshot/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, targetPackages, fetchurl, noSysDirs
+{ stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
 , langObjC ? stdenv.targetPlatform.isDarwin
 , langObjCpp ? stdenv.targetPlatform.isDarwin
@@ -16,6 +16,7 @@
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
 , name ? "gcc"
 , libcCross ? null
+, threadsCross ? null # for MinGW
 , crossStageStatic ? false
 , # Strip kills static libs of other archs (hence no cross)
   stripped ? stdenv.hostPlatform == stdenv.buildPlatform
@@ -35,10 +36,14 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 # The go frontend is written in c++
 assert langGo -> langCC;
 
+# threadsCross is just for MinGW
+assert threadsCross != null -> stdenv.targetPlatform.isWindows;
+
 with stdenv.lib;
 with builtins;
 
-let version = "7-20170409";
+let majorVersion = "7";
+    version = "${majorVersion}-20170409";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -46,7 +51,11 @@ let version = "7-20170409";
       [ ]
       ++ optional (targetPlatform != hostPlatform) ../libstdc++-target.patch
       ++ optional noSysDirs ../no-sys-dirs.patch
-      ++ optional langFortran ../gfortran-driving.patch;
+      ++ optional langFortran ../gfortran-driving.patch
+      ++ optional (!crossStageStatic && targetPlatform.isMinGW) (fetchpatch {
+        url = "https://raw.githubusercontent.com/lhmouse/MINGW-packages/${import ../common/mfcgthreads-patches-repo.nix}/mingw-w64-gcc-git/9000-gcc-${majorVersion}-branch-Added-mcf-thread-model-support-from-mcfgthread.patch";
+        sha256 = "1nyjnshpq5gbcbbpfv27hy4ajvycmgkpiabkjlxnnrnq1d99k1ay";
+      });
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";
@@ -118,6 +127,8 @@ stdenv.mkDerivation ({
     ++ (optional hostPlatform.isDarwin gnused)
     ;
 
+  depsTargetTarget = optional (!crossStageStatic && threadsCross != null) threadsCross;
+
   NIX_LDFLAGS = stdenv.lib.optionalString  hostPlatform.isSunOS "-lm -ldl";
 
   preConfigure = import ../common/pre-configure.nix {
@@ -186,7 +197,7 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit stdenv crossStageStatic libcCross;
+      inherit stdenv crossStageStatic libcCross threadsCross;
     })
     EXTRA_TARGET_FLAGS
     EXTRA_TARGET_LDFLAGS
diff --git a/pkgs/os-specific/windows/mcfgthreads/default.nix b/pkgs/os-specific/windows/mcfgthreads/default.nix
index 468e92a1e9d..6c4cd171025 100644
--- a/pkgs/os-specific/windows/mcfgthreads/default.nix
+++ b/pkgs/os-specific/windows/mcfgthreads/default.nix
@@ -3,16 +3,21 @@
 stdenv.mkDerivation {
   pname = "mcfgthreads";
   version = "git";
+
   src = fetchFromGitHub {
     owner = "lhmouse";
     repo = "mcfgthread";
     rev = "9570e5ca7b98002d707c502c919d951bf256b9c6";
     sha256 = "10y2x3x601a7c1hkd6zlr3xpfsnlr05xl28v23clf619756a5755";
   };
+
+  outputs = [ "out" "dev" ];
+
   # Don't want prebuilt binaries sneaking in.
   postUnpack = ''
     rm -r "$sourceRoot/debug" "$sourceRoot/release"
   '';
+
   nativeBuildInputs = [
     autoreconfHook
   ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4ca16cc81e6..c524add8b05 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7610,6 +7610,7 @@ in
       };
       bintools = binutils1;
       libc = libcCross1;
+      extraPackages = [];
   };
 
   gcc48 = lowPrio (wrapCC (callPackage ../development/compilers/gcc/4.8 {
@@ -7619,6 +7620,7 @@ in
     profiledCompiler = with stdenv; (!isSunOS && !isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = if !stdenv.isDarwin then isl_0_14 else null;
     cloog = if !stdenv.isDarwin then cloog else null;
@@ -7632,6 +7634,7 @@ in
     profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = if !stdenv.isDarwin then isl_0_11 else null;
 
@@ -7645,6 +7648,7 @@ in
     profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = if !stdenv.isDarwin then isl_0_14 else null;
   }));
@@ -7656,6 +7660,7 @@ in
     profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = if !stdenv.isDarwin then isl_0_14 else null;
   }));
@@ -7667,6 +7672,7 @@ in
     profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = if !stdenv.isDarwin then isl_0_17 else null;
   }));
@@ -7678,6 +7684,7 @@ in
     profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = if !stdenv.isDarwin then isl_0_17 else null;
   }));
@@ -7689,6 +7696,7 @@ in
     profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = if !stdenv.isDarwin then isl_0_17 else null;
   }));
@@ -7700,6 +7708,7 @@ in
     profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
 
     libcCross = if stdenv.targetPlatform != stdenv.buildPlatform then libcCross else null;
+    threadsCross = if stdenv.targetPlatform != stdenv.buildPlatform then threadsCross else null;
 
     isl = isl_0_17;
   }));
@@ -8497,6 +8506,7 @@ in
       # provide the default choice, avoiding infinite recursion.
       bintools ? if stdenv.targetPlatform.isDarwin then darwin.binutils else binutils
     , libc ? bintools.libc
+    , extraPackages ? stdenv.lib.optional (cc.isGNU or false && stdenv.targetPlatform.isMinGW) threadsCross
     , ...
     } @ extraArgs:
       callPackage ../build-support/cc-wrapper (let self = {
@@ -8508,7 +8518,7 @@ in
     isGNU = cc.isGNU or false;
     isClang = cc.isClang or false;
 
-    inherit cc bintools libc;
+    inherit cc bintools libc extraPackages;
   } // extraArgs; in self);
 
   wrapCC = cc: wrapCCWith {
@@ -10973,6 +10983,11 @@ in
 
   libcCross = assert stdenv.targetPlatform != stdenv.buildPlatform; libcCrossChooser stdenv.targetPlatform.libc;
 
+  threadsCross =
+    if stdenv.targetPlatform.isMinGW && !(stdenv.targetPlatform.useLLVM or false)
+    then targetPackages.windows.mcfgthreads or windows.mcfgthreads
+    else null;
+
   wasilibc = callPackage ../development/libraries/wasilibc {
     stdenv = crossLibcStdenv;
   };