openocd: allow building for Windows

This introduces few changes to the OpenOCD to be able to build under
mingw32. Right now it is slim down version to allow at least minimal but
still functional version to be available.

pkgs/development/embedded/openocd/default.nix

@@ -3,6 +3,7 @@
 , fetchurl
 , pkg-config
 , hidapi
+, tcl
 , jimtcl
 , libjaylink
 , libusb1
@@ -12,8 +13,12 @@
 
 # Allow selection the hardware targets (SBCs, JTAG Programmers, JTAG Adapters)
 , extraHardwareSupport ? []
-}:
+}: let
 
+  isWindows = stdenv.hostPlatform.isWindows;
+  notWindows = !isWindows;
+
+in
 stdenv.mkDerivation rec {
   pname = "openocd";
   version = "0.12.0";
@@ -22,23 +27,24 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-ryVHiL6Yhh8r2RA/5uYKd07Jaow3R0Tu+Rl/YEMHWvo=";
   };
 
-  nativeBuildInputs = [ pkg-config ];
+  nativeBuildInputs = [ pkg-config tcl ];
 
-  buildInputs = [ hidapi jimtcl libftdi1 libjaylink libusb1 ]
+  buildInputs = [ libusb1 ]
+    ++ lib.optionals notWindows [ hidapi jimtcl libftdi1 libjaylink ]
     ++
     # tracking issue for v2 api changes https://sourceforge.net/p/openocd/tickets/306/
     lib.optional stdenv.isLinux libgpiod_1;
 
   configureFlags = [
     "--disable-werror"
-    "--disable-internal-jimtcl"
-    "--disable-internal-libjaylink"
     "--enable-jtag_vpi"
-    "--enable-buspirate"
     "--enable-remote-bitbang"
-    (lib.enableFeature enableFtdi "ftdi")
+    (lib.enableFeature notWindows "buspirate")
+    (lib.enableFeature (notWindows && enableFtdi) "ftdi")
     (lib.enableFeature stdenv.isLinux "linuxgpiod")
     (lib.enableFeature stdenv.isLinux "sysfsgpio")
+    (lib.enableFeature isWindows "internal-jimtcl")
+    (lib.enableFeature isWindows "internal-libjaylink")
   ] ++
     map (hardware: "--enable-${hardware}") extraHardwareSupport
   ;
@@ -75,6 +81,6 @@ stdenv.mkDerivation rec {
     homepage = "https://openocd.sourceforge.net/";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ bjornfor prusnak ];
-    platforms = platforms.unix;
+    platforms = platforms.unix ++ platforms.windows;
   };
 }

pkgs/development/libraries/hidapi/default.nix

@@ -43,6 +43,6 @@ stdenv.mkDerivation (finalAttrs: {
       "hidapi-hidraw"
       "hidapi-libusb"
     ];
-    platforms = platforms.unix;
+    platforms = platforms.unix ++ platforms.windows;
   };
 })