mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
65 lines
1.8 KiB
CMake
65 lines
1.8 KiB
CMake
|
|
include(CMakeParseArguments)
|
|
|
|
function(precondition var)
|
|
cmake_parse_arguments(
|
|
PRECONDITION # prefix
|
|
"NEGATE" # options
|
|
"MESSAGE" # single-value args
|
|
"" # multi-value args
|
|
${ARGN})
|
|
|
|
if (PRECONDITION_NEGATE)
|
|
if (${var})
|
|
if (PRECONDITION_MESSAGE)
|
|
message(FATAL_ERROR "Error! ${PRECONDITION_MESSAGE}")
|
|
else()
|
|
message(FATAL_ERROR "Error! Variable ${var} is true or not empty. The value of ${var} is ${${var}}.")
|
|
endif()
|
|
endif()
|
|
else()
|
|
if (NOT ${var})
|
|
if (PRECONDITION_MESSAGE)
|
|
message(FATAL_ERROR "Error! ${PRECONDITION_MESSAGE}")
|
|
else()
|
|
message(FATAL_ERROR "Error! Variable ${var} is false, empty or not set.")
|
|
endif()
|
|
endif()
|
|
endif()
|
|
endfunction()
|
|
|
|
# Translate a yes/no variable to the presence of a given string in a
|
|
# variable.
|
|
#
|
|
# Usage:
|
|
# translate_flag(is_set flag_name var_name)
|
|
#
|
|
# If is_set is true, sets ${var_name} to ${flag_name}. Otherwise,
|
|
# unsets ${var_name}.
|
|
function(translate_flag is_set flag_name var_name)
|
|
if(${is_set})
|
|
set("${var_name}" "${flag_name}" PARENT_SCOPE)
|
|
else()
|
|
set("${var_name}" "" PARENT_SCOPE)
|
|
endif()
|
|
endfunction()
|
|
|
|
|
|
# Run a shell command and assign output to a variable or fail with an error.
|
|
# Example usage:
|
|
# runcmd(COMMAND "xcode-select" "-p"
|
|
# VARIABLE xcodepath
|
|
# ERROR "Unable to find current Xcode path")
|
|
function(runcmd)
|
|
cmake_parse_arguments(RUNCMD "" "VARIABLE;ERROR" "COMMAND" ${ARGN})
|
|
execute_process(
|
|
COMMAND ${RUNCMD_COMMAND}
|
|
OUTPUT_VARIABLE ${RUNCMD_VARIABLE}
|
|
RESULT_VARIABLE result
|
|
ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
|
|
if(NOT "${result}" MATCHES "0")
|
|
message(FATAL_ERROR "${RUNCMD_ERROR}")
|
|
endif()
|
|
set(${RUNCMD_VARIABLE} ${${RUNCMD_VARIABLE}} PARENT_SCOPE)
|
|
endfunction(runcmd)
|