Make GN run when doing 32-bit cross-compiles on Linux.

Previously, the breakpad client target wasn't getting compiled.

R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/462813005

Cr-Commit-Position: refs/heads/master@{#289063}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289063 0039d316-1c4b-4281-b951-d872f2087c98

breakpad/BUILD.gn

@@ -324,61 +324,64 @@ if (is_linux || is_android) {
   }
 }
 
-if (is_linux && current_toolchain == host_toolchain) {
-  executable("dump_syms") {
-    sources = [
-      "src/common/dwarf/bytereader.cc",
-      "src/common/dwarf_cfi_to_module.cc",
-      "src/common/dwarf_cfi_to_module.h",
-      "src/common/dwarf_cu_to_module.cc",
-      "src/common/dwarf_cu_to_module.h",
-      "src/common/dwarf/dwarf2diehandler.cc",
-      "src/common/dwarf/dwarf2reader.cc",
-      "src/common/dwarf_line_to_module.cc",
-      "src/common/dwarf_line_to_module.h",
-      "src/common/language.cc",
-      "src/common/language.h",
-      "src/common/linux/crc32.cc",
-      "src/common/linux/crc32.h",
-      "src/common/linux/dump_symbols.cc",
-      "src/common/linux/dump_symbols.h",
-      "src/common/linux/elf_symbols_to_module.cc",
-      "src/common/linux/elf_symbols_to_module.h",
-      "src/common/linux/elfutils.cc",
-      "src/common/linux/elfutils.h",
-      "src/common/linux/file_id.cc",
-      "src/common/linux/file_id.h",
-      "src/common/linux/linux_libc_support.cc",
-      "src/common/linux/linux_libc_support.h",
-      "src/common/linux/memory_mapped_file.cc",
-      "src/common/linux/memory_mapped_file.h",
-      "src/common/linux/guid_creator.h",
-      "src/common/module.cc",
-      "src/common/module.h",
-      "src/common/stabs_reader.cc",
-      "src/common/stabs_reader.h",
-      "src/common/stabs_to_module.cc",
-      "src/common/stabs_to_module.h",
-      "src/tools/linux/dump_syms/dump_syms.cc",
-    ]
-
-    # There are some warnings in this code.
-    configs -= [ "//build/config/compiler:chromium_code" ]
-    configs += [ "//build/config/compiler:no_chromium_code" ]
-
-    # dwarf2reader.cc uses dynamic_cast. Because we don't typically
-    # don't support RTTI, we enable it for this single target. Since
-    # dump_syms doesn't share any object files with anything else,
-    # this doesn't end up polluting Chrome itself.
-    configs -= [ "//build/config/compiler:no_rtti" ]
-    configs += [ "//build/config/compiler:rtti" ]
-
-    # Breakpad rev 583 introduced this flag.
-    # Using this define, stabs_reader.h will include a.out.h to
-    # build on Linux.
-    defines = [ "HAVE_A_OUT_H" ]
-
-    include_dirs = [ "src" ]
+if (is_linux) {
+  if (current_toolchain == host_toolchain) {
+    # dump_syms is a host tool, so only compile it for the host system.
+    executable("dump_syms") {
+      sources = [
+        "src/common/dwarf/bytereader.cc",
+        "src/common/dwarf_cfi_to_module.cc",
+        "src/common/dwarf_cfi_to_module.h",
+        "src/common/dwarf_cu_to_module.cc",
+        "src/common/dwarf_cu_to_module.h",
+        "src/common/dwarf/dwarf2diehandler.cc",
+        "src/common/dwarf/dwarf2reader.cc",
+        "src/common/dwarf_line_to_module.cc",
+        "src/common/dwarf_line_to_module.h",
+        "src/common/language.cc",
+        "src/common/language.h",
+        "src/common/linux/crc32.cc",
+        "src/common/linux/crc32.h",
+        "src/common/linux/dump_symbols.cc",
+        "src/common/linux/dump_symbols.h",
+        "src/common/linux/elf_symbols_to_module.cc",
+        "src/common/linux/elf_symbols_to_module.h",
+        "src/common/linux/elfutils.cc",
+        "src/common/linux/elfutils.h",
+        "src/common/linux/file_id.cc",
+        "src/common/linux/file_id.h",
+        "src/common/linux/linux_libc_support.cc",
+        "src/common/linux/linux_libc_support.h",
+        "src/common/linux/memory_mapped_file.cc",
+        "src/common/linux/memory_mapped_file.h",
+        "src/common/linux/guid_creator.h",
+        "src/common/module.cc",
+        "src/common/module.h",
+        "src/common/stabs_reader.cc",
+        "src/common/stabs_reader.h",
+        "src/common/stabs_to_module.cc",
+        "src/common/stabs_to_module.h",
+        "src/tools/linux/dump_syms/dump_syms.cc",
+      ]
+
+      # There are some warnings in this code.
+      configs -= [ "//build/config/compiler:chromium_code" ]
+      configs += [ "//build/config/compiler:no_chromium_code" ]
+
+      # dwarf2reader.cc uses dynamic_cast. Because we don't typically
+      # don't support RTTI, we enable it for this single target. Since
+      # dump_syms doesn't share any object files with anything else,
+      # this doesn't end up polluting Chrome itself.
+      configs -= [ "//build/config/compiler:no_rtti" ]
+      configs += [ "//build/config/compiler:rtti" ]
+
+      # Breakpad rev 583 introduced this flag.
+      # Using this define, stabs_reader.h will include a.out.h to
+      # build on Linux.
+      defines = [ "HAVE_A_OUT_H" ]
+
+      include_dirs = [ "src" ]
+    }
   }
 
   static_library("client") {