GN: Don't expose glslang when unused.

The ninja generation step could get confused if we try to build the glslang wrapper project on platforms that don't support glslang. Turn it off if the Metal / Vulkan back-ends are not enabled. Bug: angleproject:4053 Change-Id: If4dd2856681f18f4f45e952bf88e33371b9a1e3c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1884010Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Jamie Madill <jmadill@chromium.org>

GN: Don't expose glslang when unused.
2f71802b · Jamie Madill · Commit Bot · a12b3032 · 2f71802b
Commit 2f71802b authored Oct 28, 2019 by Jamie Madill Committed by Commit Bot Oct 28, 2019
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BUILD.gn BUILD.gn +4 -1

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--- a/BUILD.gn
+++ b/BUILD.gn
@@ -595,7 +595,9 @@ angle_source_set("libANGLE_headers") {
  ]
 }
-angle_source_set("angle_glslang_wrapper") {
+# Don't even try to build glslang if Metal and Vulkan are disabled.
+if (angle_enable_vulkan || angle_enable_metal) {
+  angle_source_set("angle_glslang_wrapper") {
    sources = [
      "src/libANGLE/renderer/glslang_wrapper_utils.cpp",
      "src/libANGLE/renderer/glslang_wrapper_utils.h",
@@ -605,6 +607,7 @@ angle_source_set("angle_glslang_wrapper") {
      "${angle_glslang_dir}:glslang_default_resource_limits_sources",
      "${angle_glslang_dir}:glslang_sources",
    ]
+  }
 }
 angle_source_set("libANGLE_base") {