blob: 1d8c9f766d63ab66ff71a6a2ded0b9a14eef1f64 (
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
|
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
CheckIncludeFile
----------------
Provides a macro to check if a header file can be included in ``C``.
.. command:: CHECK_INCLUDE_FILE
.. code-block:: cmake
CHECK_INCLUDE_FILE(<include> <variable> [<flags>])
Check if the given ``<include>`` file may be included in a ``C``
source file and store the result in an internal cache entry named
``<variable>``. The optional third argument may be used to add
compilation flags to the check (or use ``CMAKE_REQUIRED_FLAGS`` below).
The following variables may be set before calling this macro to modify
the way the check is run:
.. include:: /module/CMAKE_REQUIRED_FLAGS.txt
.. include:: /module/CMAKE_REQUIRED_DEFINITIONS.txt
.. include:: /module/CMAKE_REQUIRED_INCLUDES.txt
.. include:: /module/CMAKE_REQUIRED_LINK_OPTIONS.txt
.. include:: /module/CMAKE_REQUIRED_LIBRARIES.txt
.. include:: /module/CMAKE_REQUIRED_QUIET.txt
See the :module:`CheckIncludeFiles` module to check for multiple headers
at once. See the :module:`CheckIncludeFileCXX` module to check for headers
using the ``CXX`` language.
#]=======================================================================]
include_guard(GLOBAL)
macro(CHECK_INCLUDE_FILE INCLUDE VARIABLE)
if(NOT DEFINED "${VARIABLE}")
if(CMAKE_REQUIRED_INCLUDES)
set(CHECK_INCLUDE_FILE_C_INCLUDE_DIRS "-DINCLUDE_DIRECTORIES=${CMAKE_REQUIRED_INCLUDES}")
else()
set(CHECK_INCLUDE_FILE_C_INCLUDE_DIRS)
endif()
set(MACRO_CHECK_INCLUDE_FILE_FLAGS ${CMAKE_REQUIRED_FLAGS})
set(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
file(READ ${CMAKE_ROOT}/Modules/CheckIncludeFile.c.in _CIF_SOURCE_CONTENT)
string(CONFIGURE "${_CIF_SOURCE_CONTENT}" _CIF_SOURCE_CONTENT)
if(NOT CMAKE_REQUIRED_QUIET)
message(CHECK_START "Looking for ${INCLUDE}")
endif()
if(${ARGC} EQUAL 3)
set(CMAKE_C_FLAGS_SAVE ${CMAKE_C_FLAGS})
string(APPEND CMAKE_C_FLAGS " ${ARGV2}")
endif()
set(_CIF_LINK_OPTIONS)
if(CMAKE_REQUIRED_LINK_OPTIONS)
set(_CIF_LINK_OPTIONS LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS})
endif()
set(_CIF_LINK_LIBRARIES "")
if(CMAKE_REQUIRED_LIBRARIES)
cmake_policy(GET CMP0075 _CIF_CMP0075
PARENT_SCOPE # undocumented, do not use outside of CMake
)
if("x${_CIF_CMP0075}x" STREQUAL "xNEWx")
set(_CIF_LINK_LIBRARIES LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
elseif("x${_CIF_CMP0075}x" STREQUAL "xOLDx")
elseif(NOT _CIF_CMP0075_WARNED)
set(_CIF_CMP0075_WARNED 1)
message(AUTHOR_WARNING
"Policy CMP0075 is not set: Include file check macros honor CMAKE_REQUIRED_LIBRARIES. "
"Run \"cmake --help-policy CMP0075\" for policy details. "
"Use the cmake_policy command to set the policy and suppress this warning."
"\n"
"CMAKE_REQUIRED_LIBRARIES is set to:\n"
" ${CMAKE_REQUIRED_LIBRARIES}\n"
"For compatibility with CMake 3.11 and below this check is ignoring it."
)
endif()
unset(_CIF_CMP0075)
endif()
try_compile(${VARIABLE}
SOURCE_FROM_VAR CheckIncludeFile.c _CIF_SOURCE_CONTENT
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
${_CIF_LINK_OPTIONS}
${_CIF_LINK_LIBRARIES}
CMAKE_FLAGS
-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILE_FLAGS}
"${CHECK_INCLUDE_FILE_C_INCLUDE_DIRS}"
)
unset(_CIF_LINK_OPTIONS)
unset(_CIF_LINK_LIBRARIES)
if(${ARGC} EQUAL 3)
set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS_SAVE})
endif()
if(${VARIABLE})
if(NOT CMAKE_REQUIRED_QUIET)
message(CHECK_PASS "found")
endif()
set(${VARIABLE} 1 CACHE INTERNAL "Have include ${INCLUDE}")
else()
if(NOT CMAKE_REQUIRED_QUIET)
message(CHECK_FAIL "not found")
endif()
set(${VARIABLE} "" CACHE INTERNAL "Have include ${INCLUDE}")
endif()
endif()
endmacro()
|
