blob: c9fc69b92ab1ecafa0c0ba786e37f9760ff00037 (
plain)
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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
##
## Copyright (c) 2016, Alliance for Open Media. All rights reserved
##
## This source code is subject to the terms of the BSD 2 Clause License and
## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
## was not distributed with this source code in the LICENSE file, you can
## obtain it at www.aomedia.org/license/software. If the Alliance for Open
## Media Patent License 1.0 was not distributed with this source code in the
## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
##
if (NOT AOM_BUILD_CMAKE_COMPILER_FLAGS_CMAKE_)
set(AOM_BUILD_CMAKE_COMPILER_FLAGS_CMAKE_ 1)
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
# Strings used to cache failed C/CXX flags.
set(AOM_FAILED_C_FLAGS)
set(AOM_FAILED_CXX_FLAGS)
# Checks C compiler for support of $c_flag. Adds $c_flag to $CMAKE_C_FLAGS when
# the compile test passes. Caches $c_flag in $AOM_FAILED_C_FLAGS when the test
# fails.
function (add_c_flag_if_supported c_flag)
unset(C_FLAG_FOUND CACHE)
string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
unset(C_FLAG_FAILED CACHE)
string(FIND "${AOM_FAILED_C_FLAGS}" "${c_flag}" C_FLAG_FAILED)
if (${C_FLAG_FOUND} EQUAL -1 AND ${C_FLAG_FAILED} EQUAL -1)
unset(C_FLAG_SUPPORTED CACHE)
message("Checking C compiler flag support for: " ${c_flag})
check_c_compiler_flag("${c_flag}" C_FLAG_SUPPORTED)
if (C_FLAG_SUPPORTED)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${c_flag}" CACHE STRING "" FORCE)
else ()
set(AOM_FAILED_C_FLAGS "${AOM_FAILED_C_FLAGS} ${c_flag}" CACHE STRING ""
FORCE)
endif ()
endif ()
endfunction ()
# Checks C++ compiler for support of $cxx_flag. Adds $cxx_flag to
# $CMAKE_CXX_FLAGS when the compile test passes. Caches $c_flag in
# $AOM_FAILED_CXX_FLAGS when the test fails.
function (add_cxx_flag_if_supported cxx_flag)
unset(CXX_FLAG_FOUND CACHE)
string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
unset(CXX_FLAG_FAILED CACHE)
string(FIND "${AOM_FAILED_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FAILED)
if (${CXX_FLAG_FOUND} EQUAL -1 AND ${CXX_FLAG_FAILED} EQUAL -1)
unset(CXX_FLAG_SUPPORTED CACHE)
message("Checking CXX compiler flag support for: " ${cxx_flag})
check_cxx_compiler_flag("${cxx_flag}" CXX_FLAG_SUPPORTED)
if (CXX_FLAG_SUPPORTED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING ""
FORCE)
else()
set(AOM_FAILED_CXX_FLAGS "${AOM_FAILED_CXX_FLAGS} ${cxx_flag}" CACHE
STRING "" FORCE)
endif ()
endif ()
endfunction ()
# Convenience method for adding a flag to both the C and C++ compiler command
# lines.
function (add_compiler_flag_if_supported flag)
add_c_flag_if_supported(${flag})
add_cxx_flag_if_supported(${flag})
endfunction ()
# Checks C compiler for support of $c_flag and terminates generation when
# support is not present.
function (require_c_flag c_flag update_c_flags)
unset(C_FLAG_FOUND CACHE)
string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
if (${C_FLAG_FOUND} EQUAL -1)
unset(HAVE_C_FLAG CACHE)
message("Checking C compiler flag support for: " ${c_flag})
check_c_compiler_flag("${c_flag}" HAVE_C_FLAG)
if (NOT HAVE_C_FLAG)
message(FATAL_ERROR
"${PROJECT_NAME} requires support for C flag: ${c_flag}.")
endif ()
if (update_c_flags)
set(CMAKE_C_FLAGS "${c_flag} ${CMAKE_C_FLAGS}" CACHE STRING "" FORCE)
endif ()
endif ()
endfunction ()
# Checks CXX compiler for support of $cxx_flag and terminates generation when
# support is not present.
function (require_cxx_flag cxx_flag update_cxx_flags)
unset(CXX_FLAG_FOUND CACHE)
string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
if (${CXX_FLAG_FOUND} EQUAL -1)
unset(HAVE_CXX_FLAG CACHE)
message("Checking CXX compiler flag support for: " ${cxx_flag})
check_cxx_compiler_flag("${cxx_flag}" HAVE_CXX_FLAG)
if (NOT HAVE_CXX_FLAG)
message(FATAL_ERROR
"${PROJECT_NAME} requires support for CXX flag: ${cxx_flag}.")
endif ()
if (update_cxx_flags)
set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}" CACHE STRING ""
FORCE)
endif ()
endif ()
endfunction ()
# Checks for support of $flag by both the C and CXX compilers. Terminates
# generation when support is not present in both compilers.
function (require_flag flag update_cmake_flags)
require_c_flag(${flag} ${update_cmake_flags})
require_cxx_flag(${flag} ${update_cmake_flags})
endfunction ()
# Checks only non-MSVC targets for support of $c_flag and terminates generation
# when support is not present.
function (require_c_flag_nomsvc c_flag update_c_flags)
if (NOT MSVC)
require_c_flag(${c_flag} ${update_c_flags})
endif ()
endfunction ()
# Checks only non-MSVC targets for support of $cxx_flag and terminates
# generation when support is not present.
function (require_cxx_flag_nomsvc cxx_flag update_cxx_flags)
if (NOT MSVC)
require_cxx_flag(${cxx_flag} ${update_cxx_flags})
endif ()
endfunction ()
# Checks only non-MSVC targets for support of $flag by both the C and CXX
# compilers. Terminates generation when support is not present in both
# compilers.
function (require_flag_nomsvc flag update_cmake_flags)
require_c_flag_nomsvc(${flag} ${update_cmake_flags})
require_cxx_flag_nomsvc(${flag} ${update_cmake_flags})
endfunction ()
# Adds $preproc_def to C compiler command line (as -D$preproc_def) if not
# already present.
function (add_c_preproc_definition preproc_def)
unset(PREPROC_DEF_FOUND CACHE)
string(FIND "${CMAKE_C_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
if (${PREPROC_DEF_FOUND} EQUAL -1)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D${preproc_def}" CACHE STRING ""
FORCE)
endif ()
endfunction ()
# Adds $preproc_def to CXX compiler command line (as -D$preproc_def) if not
# already present.
function (add_cxx_preproc_definition preproc_def)
unset(PREPROC_DEF_FOUND CACHE)
string(FIND "${CMAKE_CXX_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
if (${PREPROC_DEF_FOUND} EQUAL -1)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D${preproc_def}" CACHE STRING ""
FORCE)
endif ()
endfunction ()
# Adds $preproc_def to C and CXX compiler command line (as -D$preproc_def) if
# not already present.
function (add_preproc_definition preproc_def)
add_c_preproc_definition(${preproc_def})
add_cxx_preproc_definition(${preproc_def})
endfunction ()
# Adds $flag to assembler command line.
function (append_as_flag flag)
unset(AS_FLAG_FOUND CACHE)
string(FIND "${AOM_AS_FLAGS}" "${flag}" AS_FLAG_FOUND)
if (${AS_FLAG_FOUND} EQUAL -1)
set(AOM_AS_FLAGS "${AOM_AS_FLAGS} ${flag}" CACHE STRING "" FORCE)
endif ()
endfunction ()
# Adds $flag to the C compiler command line.
function (append_c_flag flag)
unset(C_FLAG_FOUND CACHE)
string(FIND "${CMAKE_C_FLAGS}" "${flag}" C_FLAG_FOUND)
if (${C_FLAG_FOUND} EQUAL -1)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" CACHE STRING "" FORCE)
endif ()
endfunction ()
# Adds $flag to the CXX compiler command line.
function (append_cxx_flag flag)
unset(CXX_FLAG_FOUND CACHE)
string(FIND "${CMAKE_CXX_FLAGS}" "${flag}" CXX_FLAG_FOUND)
if (${CXX_FLAG_FOUND} EQUAL -1)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" CACHE STRING "" FORCE)
endif ()
endfunction ()
# Adds $flag to the C and CXX compiler command lines.
function (append_compiler_flag flag)
append_c_flag(${flag})
append_cxx_flag(${flag})
endfunction ()
# Adds $flag to the executable linker command line.
function (append_exe_linker_flag flag)
unset(LINKER_FLAG_FOUND CACHE)
string(FIND "${CMAKE_EXE_LINKER_FLAGS}" "${flag}" LINKER_FLAG_FOUND)
if (${LINKER_FLAG_FOUND} EQUAL -1)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}" CACHE STRING
"" FORCE)
endif ()
endfunction ()
endif () # AOM_BUILD_CMAKE_COMPILER_FLAGS_CMAKE_
|
