From: Eric Fiselier <eric@efcs.ca>
Date: Tue, 12 May 2015 22:49:18 +0000 (+0000)
Subject: Allow the CMake option 'LLVM_ABI_BREAKING_CHECKS' to be undefined.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=00386077e17b4a977df3a228a438453ea5cb26e9;p=llvm

Allow the CMake option 'LLVM_ABI_BREAKING_CHECKS' to be undefined.

When building libc++abi in a standalone configuration the CMake option
'LLVM_ABI_BREAKING_CHECKS` will not be defined.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237204 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index d2b89748765..b878863b32f 100644
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -88,6 +88,9 @@ elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_ON" )
   set( LLVM_ENABLE_ABI_BREAKING_CHECKS 1 )
 elseif( uppercase_LLVM_ABI_BREAKING_CHECKS STREQUAL "FORCE_OFF" )
   # We don't need to do anything special to turn off ABI breaking checks.
+elseif( NOT DEFINED LLVM_ABI_BREAKING_CHECKS )
+  # Treat LLVM_ABI_BREAKING_CHECKS like "FORCE_OFF" when it has not been
+  # defined.
 else()
   message(FATAL_ERROR "Unknown value for LLVM_ABI_BREAKING_CHECKS: \"${LLVM_ABI_BREAKING_CHECKS}\"!")
 endif()