[gn] Use ghash if using clang & LLD together to make PDBs

rnk · rnk · commit d75be4c06a73 · 2020-03-09T15:23:54.000-07:00
I noticed my links were a bit slower on Windows than usual. Reviewed By: thakis Differential Revision: https://reviews.llvm.org/D75774
diff --git a/llvm/utils/gn/build/BUILD.gn b/llvm/utils/gn/build/BUILD.gn
@@ -64,6 +64,12 @@ config("compiler_defaults") {
         "/FS",
       ]
       ldflags += [ "/DEBUG" ]
+
+      # Speed up links with ghash on windows.
+      if (use_lld && is_clang) {
+        cflags += [ "-gcodeview-ghash" ]
+        ldflags += [ "/DEBUG:GHASH" ]
+      }
     }
     if (is_optimized) {
       cflags += [

Original file line number	Diff line number	Diff line change
`@@ -64,6 +64,12 @@ config("compiler_defaults") {`
`64`	`64`	`"/FS",`
`65`	`65`	`]`
`66`	`66`	`ldflags += [ "/DEBUG" ]`
	`67`	`+`
	`68`	`+ # Speed up links with ghash on windows.`
	`69`	`+ if (use_lld && is_clang) {`
	`70`	`+ cflags += [ "-gcodeview-ghash" ]`
	`71`	`+ ldflags += [ "/DEBUG:GHASH" ]`
	`72`	`+ }`
`67`	`73`	`}`
`68`	`74`	`if (is_optimized) {`
`69`	`75`	`cflags += [`