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CMake: Turn LLVM_ENABLE_LIBXML2 into a tri-state option

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In addition to the current ON and OFF options, this adds the FORCE_ON
option, which causes a configuration error if libxml2 cannot be used.

Differential revision: https://reviews.llvm.org/D40050

llvm-svn: 318209
This commit is contained in:
Hans Wennborg 2017-11-14 22:32:49 +00:00
parent 61a86474b9
commit da29bc5094
2 changed files with 5 additions and 1 deletions
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2
CMakeLists.txt
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@ -347,7 +347,7 @@ set(LLVM_TARGET_ARCH "host"
option(LLVM_ENABLE_TERMINFO "Use terminfo database if available." ON)
option(LLVM_ENABLE_LIBXML2 "Use libxml2 if available." ON)
set(LLVM_ENABLE_LIBXML2 "ON" CACHE STRING "Use libxml2 if available. Can be ON, OFF, or FORCE_ON")
option(LLVM_ENABLE_LIBEDIT "Use libedit if available." ON)

4
cmake/config-ix.cmake
View File

@ -170,6 +170,10 @@ if( NOT PURE_WINDOWS AND NOT LLVM_USE_SANITIZER MATCHES "Memory.*")
endif()
endif()
if (LLVM_ENABLE_LIBXML2 STREQUAL "FORCE_ON" AND NOT LLVM_LIBXML2_ENABLED)
message(FATAL_ERROR "Failed to congifure libxml2")
endif()
check_library_exists(xar xar_open "" HAVE_LIBXAR)
if(HAVE_LIBXAR)
set(XAR_LIB xar)