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Allow the CMake option 'LLVM_ABI_BREAKING_CHECKS' to be undefined.

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

llvm-svn: 237204
This commit is contained in:
Eric Fiselier 2015-05-12 22:49:18 +00:00
parent 5a77ea6a17
commit f17438b6f2
1 changed files with 3 additions and 0 deletions
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3
cmake/modules/HandleLLVMOptions.cmake
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@ -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()