jyapayne/cppast
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Improve llvm-config logic

Browse source 
Fixes foonathan/standardese#123.
This commit is contained in:
Jonathan Müller 2019-02-12 19:37:47 +01:00
commit 5fae110ca0
1 changed files with 29 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

38
external/external.cmake vendored
View file

@ -96,15 +96,41 @@ function(_cppast_download_llvm_from_llvm_releases version os)
set(LLVM_DOWNLOAD_DIR ${LLVM_DOWNLOAD_DIR} PARENT_SCOPE)
endfunction()
# determines the llvm version from a config binary
macro(_cppast_llvm_version output_name llvm_binary)
execute_process(COMMAND ${llvm_binary} --version
OUTPUT_VARIABLE ${output_name} OUTPUT_STRIP_TRAILING_WHITESPACE)
# ignore git tags in the version string, get the semver number only
string(REGEX REPLACE "([0-9]).([0-9]).([0-9])(.*)" "\\1.\\2.\\3" ${output_name} "${${output_name}}")
endmacro()
# finds the llvm-config binary
# sets: LLVM_CONFIG_BINARY
function(_cppast_find_llvm_config)
unset(LLVM_CONFIG_BINARY CACHE)
if (LLVM_DOWNLOAD_DIR)
if(LLVM_DOWNLOAD_DIR)
find_program(LLVM_CONFIG_BINARY "llvm-config" "${LLVM_DOWNLOAD_DIR}/bin" NO_DEFAULT_PATH)
else()
find_program(LLVM_CONFIG_BINARY NAMES llvm-config llvm-config-4.0 llvm-config-5.0 llvm-config-6.0 llvm-config-7)
find_program(llvm_config_binary_no_suffix llvm-config)
find_program(llvm_config_binary_suffix NAMES llvm-config-7 llvm-config-6.0 llvm-config-5.0 llvm-config-4.0)
if(NOT llvm_config_binary_no_suffix)
set(LLVM_CONFIG_BINARY ${llvm_config_binary_suffix} CACHE INTERNAL "")
elseif(NOT llvm_config_binary_suffix)
set(LLVM_CONFIG_BINARY ${llvm_config_binary_no_suffix} CACHE INTERNAL "")
else()
# pick latest version of the two
_cppast_llvm_version(suffix_version ${llvm_config_binary_suffix})
_cppast_llvm_version(no_suffix_version ${llvm_config_binary_no_suffix})
if(suffix_version VERSION_GREATER no_suffix_version)
set(LLVM_CONFIG_BINARY ${llvm_config_binary_suffix} CACHE INTERNAL "")
else()
set(LLVM_CONFIG_BINARY ${llvm_config_binary_no_suffix} CACHE INTERNAL "")
endif()
endif()
endif()
if(NOT LLVM_CONFIG_BINARY)
message(FATAL_ERROR "Unable to find llvm-config binary, please set option LLVM_CONFIG_BINARY yourself")
else()
@ -119,13 +145,7 @@ function(_cppast_find_libclang config_tool min_version force)
message(FATAL_ERROR "LLVM config binary not found at ${LLVM_CONFIG_BINARY}")
endif()
# check version
execute_process(COMMAND ${LLVM_CONFIG_BINARY} --version
OUTPUT_VARIABLE llvm_version OUTPUT_STRIP_TRAILING_WHITESPACE)
# ignore git tags in the version string, get the semver number only
string(REGEX REPLACE "([0-9]).([0-9]).([0-9])(.*)" "\\1.\\2.\\3" llvm_version "${llvm_version}")
_cppast_llvm_version(llvm_version ${config_tool})
if(llvm_version VERSION_LESS min_version)
message(FATAL_ERROR "Outdated LLVM version ${llvm_version}, minimal supported is ${min_version}")
else()