[PATCH] D108416: [llvm-libgcc] initial commit

[Louis Dionne via Phabricator via llvm-commits]

ldionne added inline comments.


================
Comment at: runtimes/CMakeLists.txt:181-200
+# llvm-libgcc incorporates both compiler-rt and libunwind as subprojects with very
+# specific flags, which causes clashes when they're independently built too.
+list(FIND "${runtimes}" "llvm-libgcc" RUNTIMES_HAS_LLVM_LIBGCC)
+if(NOT RUNTIMES_HAS_LLVM_LIBGCC EQUAL -1)
+  list(FIND "${runtimes}" "compiler-rt" RUNTIMES_HAS_COMPILER_RT)
+  list(FIND "${LLVM_ENABLE_PROJECTS}" "compiler-rt" RUNTIMES_PROJECTS_HAS_COMPILER_RT)
+  if(NOT RUNTIMES_HAS_COMPILER_RT EQUAL -1 OR NOT RUNTIMES_PROJECTS_HAS_COMPILER_RT EQUAL -1)
----------------
I think this can be simplified like this:

```
if("llvm-libgcc" IN_LIST runtimes)
  if("compiler-rt" IN_LIST runtimes OR "compiler-rt" IN_LIST LLVM_ENABLE_PROJECTS)
    message(FATAL_ERROR
      "Attempting to build both compiler-rt and llvm-libgcc will cause irreconcilable "
      "target clashes. Please choose one or the other, but not both.")
  endif()

  if("libunwind" IN_LIST runtimes)
    message(
      FATAL_ERROR
      "Attempting to build both libunwind and llvm-libgcc will cause irreconcilable "
      "target clashes. Please choose one or the other, but not both.")
  endif()
endif()
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D108416/new/

https://reviews.llvm.org/D108416