GN: Make NaCl toolchains run on Windows host

build/toolchain/nacl/BUILD.gn

 # Copyright (c) 2014 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/sysroot.gni")
 import("//build/config/nacl/config.gni")
 import("//build/toolchain/nacl_toolchain.gni")
 
 # Add the toolchain revision as a preprocessor define so that sources are
 # rebuilt when a toolchain is updated.
 # Idea we could use the toolchain deps feature, but currently that feature is
 # bugged and does not trigger a rebuild.
 # https://code.google.com/p/chromium/issues/detail?id=431880
 # Calls to get the toolchain revision are relatively slow, so do them all in a
 # single batch to amortize python startup, etc.
 revisions = exec_script("//native_client/build/get_toolchain_revision.py",
                         [
                           "nacl_x86_glibc",
                           "nacl_arm_glibc",
                           "pnacl_newlib",
                         ],
                         "trim list lines")
 nacl_x86_glibc_rev = revisions[0]
 nacl_arm_glibc_rev = revisions[1]
 
 # TODO(mcgrathr): Uncomment this when
-# https://code.google.com/p/chromium/issues/detail?id=555724 is fixed.
+# https://code.google.com/p/chromium/issues/detail?id=395883 is fixed.
 #pnacl_newlib_rev = revisions[2]
 
 template("pnacl_toolchain") {
   assert(defined(invoker.strip), "Must define strip")
   assert(defined(invoker.executable_extension),
          "Must define executable_extension")
 
   # TODO(mcgrathr): See above.
   pnacl_newlib_rev = revisions[2]
 
   nacl_toolchain(target_name) {
     toolchain_package = "pnacl_newlib"
     toolchain_revision = pnacl_newlib_rev
     toolchain_cpu = "pnacl"
     toolprefix =
         rebase_path("${nacl_toolchain_dir}/${toolchain_package}/bin/pnacl-",
                     root_build_dir)
 
     is_clang = true
     cc = toolprefix + "clang"
     cxx = toolprefix + "clang++"
     ar = toolprefix + "ar"
     ld = cxx
+    readelf = toolprefix + "readelf"
+    nm = toolprefix + "nm"
     strip = toolprefix + invoker.strip
     executable_extension = invoker.executable_extension
   }
 }
 
 pnacl_toolchain("newlib_pnacl") {
   executable_extension = ".pexe"
 
   # The pnacl-finalize tool turns a .pexe.debug file into a .pexe file.
   # It's very similar in purpose to the traditional "strip" utility: it
@@ skipping 19 matching lines @@
   forward_variables_from(invoker,
                          [
                            "toolchain_package",
                            "toolchain_revision",
                          ])
 
   toolprefix = rebase_path("${nacl_toolchain_dir}/${toolchain_package}/bin/" +
                                invoker.toolchain_tuple + "-",
                            root_build_dir)
 
+  # TODO(mcgrathr): Hoist this to top level when
+  # https://code.google.com/p/chromium/issues/detail?id=395883 is fixed.
+  if (host_os == "win") {
+    toolsuffix = ".exe"
+  } else {
+    toolsuffix = ""
+  }
+
   nacl_toolchain("glibc_" + toolchain_cpu) {
     is_clang = false
     is_nacl_glibc = true
 
-    cc = toolprefix + "gcc"
-    cxx = toolprefix + "g++"
-    ar = toolprefix + "ar"
+    cc = toolprefix + "gcc" + toolsuffix
+    cxx = toolprefix + "g++" + toolsuffix
+    ar = toolprefix + "ar" + toolsuffix
     ld = cxx
+    readelf = toolprefix + "readelf" + toolsuffix
+    nm = toolprefix + "nm" + toolsuffix
+    strip = toolprefix + "strip" + toolsuffix
   }
 }
 
 nacl_glibc_toolchain("x86") {
   toolchain_package = "nacl_x86_glibc"
   toolchain_revision = nacl_x86_glibc_rev
   toolchain_tuple = "i686-nacl"
 }
 
 nacl_glibc_toolchain("x64") {
@@ skipping 14 matching lines @@
 
   # TODO(mcgrathr): See above.
   pnacl_newlib_rev = revisions[2]
 
   toolchain_package = "pnacl_newlib"
   toolchain_revision = pnacl_newlib_rev
   toolprefix = rebase_path("${nacl_toolchain_dir}/${toolchain_package}/bin/" +
                                invoker.toolchain_tuple + "-",
                            root_build_dir)
 
+  # TODO(mcgrathr): Hoist this to top level when
+  # https://code.google.com/p/chromium/issues/detail?id=395883 is fixed.
+  if (host_os == "win") {
+    toolsuffix = ".exe"
+  } else {
+    toolsuffix = ""
+  }
+
   nacl_toolchain("clang_newlib_" + toolchain_cpu) {
     is_clang = true
-    cc = toolprefix + "clang"
-    cxx = toolprefix + "clang++"
-    ar = toolprefix + "ar"
+    cc = toolprefix + "clang" + toolsuffix
+    cxx = toolprefix + "clang++" + toolsuffix
+    ar = toolprefix + "ar" + toolsuffix
     ld = cxx
+    readelf = toolprefix + "readelf" + toolsuffix
+    nm = toolprefix + "nm" + toolsuffix
+    strip = toolprefix + "strip" + toolsuffix
   }
 }
 
 template("nacl_irt_toolchain") {
   toolchain_cpu = target_name
   assert(defined(invoker.toolchain_tuple), "Must define toolchain_tuple")
 
   # TODO(mcgrathr): See above.
   pnacl_newlib_rev = revisions[2]
 
   toolchain_package = "pnacl_newlib"
   toolchain_revision = pnacl_newlib_rev
   toolprefix = rebase_path("${nacl_toolchain_dir}/${toolchain_package}/bin/" +
                                invoker.toolchain_tuple + "-",
                            root_build_dir)
 
+  # TODO(mcgrathr): Hoist this to top level when
+  # https://code.google.com/p/chromium/issues/detail?id=395883 is fixed.
+  if (host_os == "win") {
+    toolsuffix = ".exe"
+  } else {
+    toolsuffix = ""
+  }
+
   link_irt = rebase_path("//native_client/build/link_irt.py", root_build_dir)
 
   tls_edit_label =
       "//native_client/src/tools/tls_edit:tls_edit($host_toolchain)"
   host_toolchain_out_dir =
       rebase_path(get_label_info(tls_edit_label, "root_out_dir"),
                   root_build_dir)
   tls_edit = "${host_toolchain_out_dir}/tls_edit"
 
   nacl_toolchain("irt_" + toolchain_cpu) {
     is_clang = true
-    cc = toolprefix + "clang"
-    cxx = toolprefix + "clang++"
-    ar = toolprefix + "ar"
-    readelf = toolprefix + "readelf"
-    strip = toolprefix + "strip"
+    cc = toolprefix + "clang" + toolsuffix
+    cxx = toolprefix + "clang++" + toolsuffix
+    ar = toolprefix + "ar" + toolsuffix
+    readelf = toolprefix + "readelf" + toolsuffix
+    nm = toolprefix + "nm" + toolsuffix
+    strip = toolprefix + "strip" + toolsuffix
 
     # Always build the IRT with full debugging symbols, regardless of
     # how Chromium itself is being built (or other NaCl executables).
     symbol_level = 2
 
     # Some IRT implementations (notably, Chromium's) contain C++ code,
     # so we need to link w/ the C++ linker.
     ld = "${python_path} ${link_irt} --tls-edit=${tls_edit} --link-cmd=${cxx} --readelf-cmd=${readelf}"
 
     # TODO(ncbray): depend on link script
@@ skipping 17 matching lines @@
   toolchain_tuple = "i686-nacl"
 }
 
 nacl_clang_toolchains("x64") {
   toolchain_tuple = "x86_64-nacl"
 }
 
 nacl_clang_toolchains("arm") {
   toolchain_tuple = "arm-nacl"
 }