Escape spaces in "libs"

The motivation is being able to add ".../DIA SDK/diaguids.lib" to libs.

Change-Id: I81f0e1c135782f21995b9cd47105bd9cd47e4edf
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/12200
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Brett Wilson <brettw@chromium.org>

src/gn/ninja_binary_target_writer.cc

diff --git a/src/gn/ninja_binary_target_writer.cc b/src/gn/ninja_binary_target_writer.cc
index a5dcd66..b26171a 100644
--- a/src/gn/ninja_binary_target_writer.cc
+++ b/src/gn/ninja_binary_target_writer.cc
@@ -357,6 +357,11 @@
 
 void NinjaBinaryTargetWriter::WriteLibs(std::ostream& out, const Tool* tool) {
   // Libraries that have been recursively pushed through the dependency tree.
+  // Since we're passing these on the command line to the linker and not
+  // to Ninja, we need to do shell escaping.
+  PathOutput lib_path_output(
+      path_output_.current_dir(), settings_->build_settings()->root_path_utf8(),
+      ESCAPE_NINJA_COMMAND);
   EscapeOptions lib_escape_opts;
   lib_escape_opts.mode = ESCAPE_NINJA_COMMAND;
   const UniqueVector<LibFile>& all_libs = target_->all_libs();
@@ -365,7 +370,7 @@
     const std::string& lib_value = lib_file.value();
     if (lib_file.is_source_file()) {
       out << " " << tool->linker_arg();
-      path_output_.WriteFile(out, lib_file.source_file());
+      lib_path_output.WriteFile(out, lib_file.source_file());
     } else {
       out << " " << tool->lib_switch();
       EscapeStringToStream(out, lib_value, lib_escape_opts);

src/gn/ninja_c_binary_target_writer_unittest.cc

diff --git a/src/gn/ninja_c_binary_target_writer_unittest.cc b/src/gn/ninja_c_binary_target_writer_unittest.cc
index ef40173..61bc517 100644
--- a/src/gn/ninja_c_binary_target_writer_unittest.cc
+++ b/src/gn/ninja_c_binary_target_writer_unittest.cc
@@ -490,6 +490,7 @@
   Target target(setup.settings(), Label(SourceDir("//foo/"), "shlib"));
   target.set_output_type(Target::SHARED_LIBRARY);
   target.config_values().libs().push_back(LibFile(SourceFile("//foo/lib1.a")));
+  target.config_values().libs().push_back(LibFile(SourceFile("//sysroot/DIA SDK/diaguids.lib")));
   target.config_values().libs().push_back(LibFile("foo"));
   target.config_values().lib_dirs().push_back(SourceDir("//foo/bar/"));
   target.SetToolchain(setup.toolchain());
@@ -507,9 +508,13 @@
       "target_output_name = libshlib\n"
       "\n"
       "\n"
-      "build ./libshlib.so: solink | ../../foo/lib1.a\n"
+      "build ./libshlib.so: solink | ../../foo/lib1.a ../../sysroot/DIA$ SDK/diaguids.lib\n"
       "  ldflags = -L../../foo/bar\n"
-      "  libs = ../../foo/lib1.a -lfoo\n"
+#ifdef _WIN32
+      "  libs = ../../foo/lib1.a \"../../sysroot/DIA$ SDK/diaguids.lib\" -lfoo\n"
+#else
+      "  libs = ../../foo/lib1.a ../../sysroot/DIA\\$ SDK/diaguids.lib -lfoo\n"
+#endif
       "  frameworks =\n"
       "  swiftmodules =\n"
       "  output_extension = .so\n"