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cmake: check clang version for fat runtime support

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This commit is contained in:
Matthew Barr 2016-12-12 16:42:32 +11:00
parent f29b203a86
commit 0d87116d33
1 changed files with 10 additions and 3 deletions
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13
CMakeLists.txt
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@ -258,13 +258,20 @@ endif()
if (CMAKE_SYSTEM_NAME MATCHES "Linux")
# This is a Linux-only feature for now - requires platform support
# elsewhere
option(FAT_RUNTIME "Build a library that supports multiple microarchitecures" ${RELEASE_BUILD})
if (FAT_RUNTIME)
if (CMAKE_C_COMPILER_ID MATCHES "Clang" AND
CMAKE_C_COMPILER_VERSION VERSION_LESS "3.9")
message (STATUS "Clang v3.9 or higher required for fat runtime, cannot build fat runtime")
set (FAT_RUNTIME_REQUISITES FALSE)
else ()
include (${CMAKE_MODULE_PATH}/attrib.cmake)
if (NOT HAS_C_ATTR_IFUNC)
message(FATAL_ERROR "Compiler does not support ifunc attribute, cannot build fat runtime")
message(STATUS "Compiler does not support ifunc attribute, cannot build fat runtime")
set (FAT_RUNTIME_REQUISITES FALSE)
else ()
set (FAT_RUNTIME_REQUISITES TRUE)
endif()
endif()
CMAKE_DEPENDENT_OPTION(FAT_RUNTIME "Build a library that supports multiple microarchitecures" ${RELEASE_BUILD} "FAT_RUNTIME_REQUISITES" OFF)
endif ()
include (${CMAKE_MODULE_PATH}/arch.cmake)