[libcxx-commits] [libcxxabi] [libc++abi] Improve error message when libunwind is missing from LLVM_ENABLE_RUNTIMES (PR #77991)

via libcxx-commits libcxx-commits at lists.llvm.org
Fri Jan 12 14:20:18 PST 2024


llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libcxxabi

Author: Louis Dionne (ldionne)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/77991.diff


1 Files Affected:

- (modified) libcxxabi/CMakeLists.txt (+3) 


``````````diff
diff --git a/libcxxabi/CMakeLists.txt b/libcxxabi/CMakeLists.txt
index c62b05bf2feafc..9d8bfa548b0125 100644
--- a/libcxxabi/CMakeLists.txt
+++ b/libcxxabi/CMakeLists.txt
@@ -47,6 +47,9 @@ option(LIBCXXABI_ENABLE_ASSERTIONS "Enable assertions independent of build mode.
 option(LIBCXXABI_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF)
 option(LIBCXXABI_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
 option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." ON)
+if (LIBCXXABI_USE_LLVM_UNWINDER AND NOT "libunwind" IN_LIST LLVM_ENABLE_RUNTIMES)
+  message(FATAL_ERROR "LIBCXXABI_USE_LLVM_UNWINDER is set to ON, but libuwnind is not specified in LLVM_ENABLE_RUNTIMES.")
+endif()
 option(LIBCXXABI_ENABLE_STATIC_UNWINDER "Statically link the LLVM unwinder." OFF)
 option(LIBCXXABI_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
 option(LIBCXXABI_ENABLE_THREADS "Build with threads enabled" ON)

``````````

</details>


https://github.com/llvm/llvm-project/pull/77991


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