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[CMake] Make LLVM_VERSION_* variables user definable

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CMake's set command overwrites existing values. Package maintainers may want or need to set the version variables manually, so we need to only set them if they are not already defined. Note I use the "if(NOT DEFINED ...)" syntax deliberately in the last case because empty string is a valid value for the suffx, but not the other variables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@250333 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Bieneman 2015-10-14 21:50:09 +00:00
parent 8e77060871
commit df03dfef7d
1 changed files with 12 additions and 4 deletions
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16
CMakeLists.txt
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@ -26,10 +26,18 @@ else()
set(cmake_3_2_USES_TERMINAL USES_TERMINAL)
endif()
set(LLVM_VERSION_MAJOR 3)
set(LLVM_VERSION_MINOR 8)
set(LLVM_VERSION_PATCH 0)
set(LLVM_VERSION_SUFFIX svn)
if(NOT LLVM_VERSION_MAJOR)
set(LLVM_VERSION_MAJOR 3)
endif()
if(NOT LLVM_VERSION_MINOR)
set(LLVM_VERSION_MINOR 8)
endif()
if(NOT LLVM_VERSION_PATCH)
set(LLVM_VERSION_PATCH 0)
endif()
if(NOT DEFINED LLVM_VERSION_SUFFIX)
set(LLVM_VERSION_SUFFIX svn)
endif()
if (POLICY CMP0048)
cmake_policy(SET CMP0048 NEW)