1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#
# Copyright © 2018-2021 pastdue ( https://github.com/past-due/ ) and contributors
# License: MIT License ( https://opensource.org/licenses/MIT )
#
# Script Version: 2021-05-21a
#
# ADD_TARGET_LINK_FLAGS_IF_SUPPORTED( TARGET <target>
# [COMPILER_TYPE <C | CXX> = CXX]
# LINK_FLAGS <link_flags>
# [CONFIG <DEBUG | RELEASE | ...>]
# [CACHED_RESULT_NAME <cached_result_name>]
# [QUIET <ALL | FAILURES | OFF> = FAILURES] )
#
# ADD_TARGET_LINK_FLAGS_IF_SUPPORTED adds the specified link flags to the target if
# the link flags seem to be supported by the current (specified) compiler + linker.
#
# If COMPILER_TYPE C is specified, this checks if the configured C compiler + linker
# seems to support the link flags. If COMPILER_TYPE CXX is specified, this checks
# if the configured CXX compiler + linker seems to support the link flags. The
# default COMPILER_TYPE is CXX.
#
# If CACHED_RESULT_NAME is specified, the result of the link-flag check will be stored
# in a CACHE variable with the name ${CACHED_RESULT_NAME}. Every subsequent CMake run
# will re-use this cached value rather than performing the check again, even if the
# ``code`` changes. If you wish to perform the check anew on every CMake run, omit
# the CACHED_RESULT_NAME parameter. (In most cases, using a CACHED_RESULT_NAME is
# recommended.)
#
# QUIET can be specified to control message output with one of the following settings:
# "ALL" - do NOT output any messages
# "FAILIRES" - do NOT output messages on any failures
# "OFF" - all output is enabled
#
function(ADD_TARGET_LINK_FLAGS_IF_SUPPORTED)
set(_options)
set(_oneValueArgs TARGET COMPILER_TYPE LINK_FLAGS CONFIG CACHED_RESULT_NAME QUIET)
set(_multiValueArgs)
CMAKE_PARSE_ARGUMENTS(_parsedArguments "${_options}" "${_oneValueArgs}" "${_multiValueArgs}" ${ARGN})
if(NOT DEFINED _parsedArguments_TARGET)
message( FATAL_ERROR "ADD_TARGET_LINK_FLAGS_IF_SUPPORTED requires TARGET" )
endif()
if(NOT DEFINED _parsedArguments_LINK_FLAGS)
message( FATAL_ERROR "ADD_TARGET_LINK_FLAGS_IF_SUPPORTED requires LINK_FLAGS" )
endif()
if(DEFINED _parsedArguments_QUIET)
if(NOT _parsedArguments_QUIET MATCHES "^(ALL|FAILURES|OFF)$")
message( FATAL_ERROR "ADD_TARGET_LINK_FLAGS_IF_SUPPORTED invalid QUIET value - must be one of: (ALL, FAILURES, OFF)" )
endif()
else()
set(_parsedArguments_QUIET "FAILURES")
endif()
if(NOT DEFINED _parsedArguments_COMPILER_TYPE)
set(_parsedArguments_COMPILER_TYPE "CXX")
endif()
set(_link_flags_config_suffix)
if(DEFINED _parsedArguments_CONFIG)
set(_link_flags_config_suffix "_${_parsedArguments_CONFIG}")
endif()
set(_check_cached_status)
if(_parsedArguments_CACHED_RESULT_NAME)
if(DEFINED "${_parsedArguments_CACHED_RESULT_NAME}")
set(_check_cached_status " (cached)")
endif()
set(_cached_result_variable_name "${_parsedArguments_CACHED_RESULT_NAME}")
else()
# Generate a temporary variable name that isn't in the cache
while(NOT _cached_result_variable_name)
string(RANDOM LENGTH 12 _tmpRandom)
set(_tmpRandom "_NOCACHE_tmp_rnd_${_tmpRandom}")
if(NOT DEFINED "${_tmpRandom}")
set(_cached_result_variable_name "${_tmpRandom}")
endif()
endwhile()
endif()
if(_parsedArguments_COMPILER_TYPE MATCHES "CXX")
CHECK_CXX_LINKER_FLAGS("${_parsedArguments_LINK_FLAGS}" ${_cached_result_variable_name} QUIET)
elseif(_parsedArguments_COMPILER_TYPE MATCHES "C")
CHECK_C_LINKER_FLAGS("${_parsedArguments_LINK_FLAGS}" ${_cached_result_variable_name} QUIET)
else()
message( FATAL_ERROR "ADD_TARGET_LINK_FLAGS_IF_SUPPORTED invalid COMPILER_TYPE value - must be one of: (C, CXX)" )
endif()
if(${_cached_result_variable_name})
if(NOT _parsedArguments_QUIET OR _parsedArguments_QUIET MATCHES "FAILURES")
message( STATUS "Set TARGET ${_parsedArguments_TARGET} LINK_FLAG${_link_flags_config_suffix}: ${_parsedArguments_LINK_FLAGS} ... YES${_check_cached_status}" )
endif()
set_property(TARGET ${_parsedArguments_TARGET} APPEND_STRING PROPERTY "LINK_FLAGS${_link_flags_config_suffix}" " ${_parsedArguments_LINK_FLAGS}")
else()
if(NOT _parsedArguments_QUIET)
message( STATUS "Set TARGET ${_parsedArguments_TARGET} LINK_FLAG${_link_flags_config_suffix}: ${_parsedArguments_LINK_FLAGS} ... no${_check_cached_status}" )
endif()
endif()
if(NOT _parsedArguments_CACHED_RESULT_NAME)
# Unset the temporary cached variable that CHECK_CXX_LINKER_FLAG populated
unset(_cached_result_variable_name CACHE)
endif()
endfunction()
INCLUDE(CheckCSourceRuns)
INCLUDE(CheckCSourceCompiles)
# CHECK_C_LINKER_FLAGS( <_FLAGS> <_RESULT>
# [QUIET] )
function(CHECK_C_LINKER_FLAGS _FLAGS _RESULT)
set(_options QUIET)
set(_oneValueArgs)
set(_multiValueArgs)
CMAKE_PARSE_ARGUMENTS(_parsedArguments "${_options}" "${_oneValueArgs}" "${_multiValueArgs}" ${ARGN})
set(_cmake_required_link_options_varname "CMAKE_REQUIRED_LINK_OPTIONS")
if (CMAKE_VERSION VERSION_LESS 3.14)
# CMake < 3.14 does not support CMAKE_REQUIRED_LINK_OPTIONS, so use CMAKE_REQUIRED_FLAGS (but this may fail in some cases)
set(_cmake_required_link_options_varname "CMAKE_REQUIRED_FLAGS")
endif()
set(${_cmake_required_link_options_varname} "${_FLAGS}")
if(_parsedArguments_QUIET)
set(CMAKE_REQUIRED_QUIET ON)
endif()
set(_test_source "int main() { return 0; }")
if(NOT CMAKE_CROSSCOMPILING AND NOT CMAKE_GENERATOR_PLATFORM)
CHECK_C_SOURCE_RUNS("${_test_source}" ${_RESULT})
else()
CHECK_C_SOURCE_COMPILES("${_test_source}" ${_RESULT})
endif()
if(_parsedArguments_QUIET)
unset(CMAKE_REQUIRED_QUIET)
endif()
set(${_cmake_required_link_options_varname} "")
endfunction(CHECK_C_LINKER_FLAGS)
INCLUDE(CheckCXXSourceRuns)
INCLUDE(CheckCXXSourceCompiles)
# CHECK_CXX_LINKER_FLAGS( <_FLAGS> <_RESULT>
# [QUIET] )
function(CHECK_CXX_LINKER_FLAGS _FLAGS _RESULT)
set(_options QUIET)
set(_oneValueArgs)
set(_multiValueArgs)
CMAKE_PARSE_ARGUMENTS(_parsedArguments "${_options}" "${_oneValueArgs}" "${_multiValueArgs}" ${ARGN})
set(_cmake_required_link_options_varname "CMAKE_REQUIRED_LINK_OPTIONS")
if (CMAKE_VERSION VERSION_LESS 3.14)
# CMake < 3.14 does not support CMAKE_REQUIRED_LINK_OPTIONS, so use CMAKE_REQUIRED_FLAGS (but this may fail in some cases)
set(_cmake_required_link_options_varname "CMAKE_REQUIRED_FLAGS")
endif()
set(${_cmake_required_link_options_varname} "${_FLAGS}")
if(_parsedArguments_QUIET)
set(CMAKE_REQUIRED_QUIET ON)
endif()
set(_test_source "int main() { return 0; }")
if(NOT CMAKE_CROSSCOMPILING AND NOT CMAKE_GENERATOR_PLATFORM)
CHECK_CXX_SOURCE_RUNS("${_test_source}" ${_RESULT})
else()
CHECK_CXX_SOURCE_COMPILES("${_test_source}" ${_RESULT})
endif()
if(_parsedArguments_QUIET)
unset(CMAKE_REQUIRED_QUIET)
endif()
set(${_cmake_required_link_options_varname} "")
endfunction(CHECK_CXX_LINKER_FLAGS)
|
