[gn build] Add cfi ignorelist to compiler-rt/lib

[aeubanks]

Summary

So that building the compiler-rt target also copies the cfi ignorelist

[aeubanks]

not sure what the proper way to do this is

if I remove ($host_toolchain) I get

ninja: warning: multiple rules generate lib/clang/14.0.0/share/cfi_ignorelist.txt. builds involving this target will not be correct; continuing anyway [-w dupbuild=warn]

[thakis]

llvm/utils/gn/secondary/compiler-rt/lib/BUILD.gn

3

This works. Another approach is to have an if (current_toolchain == default_toolchain) around the cfi:ignorelist target. (But this is fine too.)

This dep is supposed to already be added here though: https://github.com/llvm/llvm-project/blob/main/llvm/utils/gn/secondary/compiler-rt/test/hwasan/BUILD.gn#L38

Does that not work? Or do you want it be built as part of some specific target that doesn't include it yet?

[thakis]

llvm/utils/gn/secondary/compiler-rt/lib/BUILD.gn

3

(In other words, answer "Why?" in the commit description.)

llvm/utils/gn/secondary/compiler-rt/lib/BUILD.gn

 group("lib") {
-  deps = [ "//compiler-rt/lib/profile" ]
+  deps = [
+    "//compiler-rt/lib/cfi:ignorelist($host_toolchain)",
+    "//compiler-rt/lib/profile",
+  ]
   if (current_os == "linux") {
     deps += [ "//compiler-rt/lib/msan" ]
   }
   if (current_os == "linux" || current_os == "android") {
     deps += [ "//compiler-rt/lib/ubsan_minimal" ]
   }
   if (current_os != "win") {
     deps += [
       "//compiler-rt/lib/asan",
       "//compiler-rt/lib/builtins",
     ]
     if (current_cpu == "x64" || current_cpu == "arm64") {
       deps += [ "//compiler-rt/lib/tsan" ]
     }
   }
 }