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
|
# Copyright (C) 2011 Daniel Scharrer
#
# This software is provided 'as-is', without any express or implied
# warranty. In no event will the author(s) be held liable for any damages
# arising from the use of this software.
#
# Permission is granted to anyone to use this software for any purpose,
# including commercial applications, and to alter it and redistribute it
# freely, subject to the following restrictions:
#
# 1. The origin of this software must not be misrepresented; you must not
# claim that you wrote the original software. If you use this software
# in a product, an acknowledgment in the product documentation would be
# appreciated but is not required.
# 2. Altered source versions must be plainly marked as such, and must not be
# misrepresented as being the original software.
# 3. This notice may not be removed or altered from any source distribution.
function(check_compiler_flag RESULT FLAG)
if(DEFINED CHECK_COMPILER_FLAG_${FLAG})
if(CHECK_COMPILER_FLAG_${FLAG})
set(${RESULT} "${FLAG}" PARENT_SCOPE)
else()
set(${RESULT} "" PARENT_SCOPE)
endif()
return()
endif()
set(compile_test_file "${CMAKE_CURRENT_BINARY_DIR}/compile_flag_test.cpp")
file(WRITE ${compile_test_file} "__attribute__((const)) int main(){ return 0; }\n")
try_compile(CHECK_COMPILER_FLAG ${CMAKE_BINARY_DIR} ${compile_test_file} COMPILE_DEFINITIONS "${FLAG}" OUTPUT_VARIABLE ERRORLOG)
string(REGEX MATCH "warning:" HAS_WARNING "${ERRORLOG}")
if(NOT CHECK_COMPILER_FLAG)
message(STATUS "Checking compiler flag: ${FLAG} - unsupported")
set(${RESULT} "" PARENT_SCOPE)
set("CHECK_COMPILER_FLAG_${FLAG}" 0 CACHE INTERNAL "...")
elseif(NOT HAS_WARNING STREQUAL "")
message(STATUS "Checking compiler flag: ${FLAG} - unsupported (warning)")
set(${RESULT} "" PARENT_SCOPE)
set("CHECK_COMPILER_FLAG_${FLAG}" 0 CACHE INTERNAL "...")
else()
message(STATUS "Checking compiler flag: ${FLAG}")
set(${RESULT} "${FLAG}" PARENT_SCOPE)
set("CHECK_COMPILER_FLAG_${FLAG}" 1 CACHE INTERNAL "...")
endif()
endfunction(check_compiler_flag)
function(add_cxxflag FLAG)
check_compiler_flag(RESULT "${FLAG}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${RESULT}" PARENT_SCOPE)
endfunction(add_cxxflag)
function(add_ldflag FLAG)
check_compiler_flag(RESULT "${FLAG}")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${RESULT}" PARENT_SCOPE)
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${RESULT}" PARENT_SCOPE)
set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${RESULT}" PARENT_SCOPE)
endfunction(add_ldflag)
function(try_link_library LIBRARY_NAME LIBRARY_FILE ERROR_VAR)
# See if we can link a simple program with the library using the configured c++ compiler.
set(link_test_file "${CMAKE_CURRENT_BINARY_DIR}/link_test.cpp")
file(WRITE ${link_test_file} "int main(){}\n")
if(CMAKE_THREAD_LIBS_INIT)
list(APPEND LIBRARY_FILE "${CMAKE_THREAD_LIBS_INIT}")
endif()
try_compile(CHECK_${LIBRARY_NAME}_LINK "${CMAKE_BINARY_DIR}" "${link_test_file}" CMAKE_FLAGS "-DLINK_LIBRARIES=${LIBRARY_FILE}" OUTPUT_VARIABLE ERRORLOG)
set(${ERROR_VAR} "${ERRORLOG}" PARENT_SCOPE)
endfunction(try_link_library)
##############################################################################
# Check that a a library actually works for the current configuration.
function(check_link_library LIBRARY_NAME LIBRARY_VARIABLE)
set(lib_current "${${LIBRARY_VARIABLE}}")
set(found_var "ARX_CLL_${LIBRARY_NAME}_FOUND")
set(working_var "ARX_CLL_${LIBRARY_NAME}_WORKING")
if(CHECK_${LIBRARY_NAME}_LINK)
set(lib_found "${${found_var}}")
set(lib_working "${${working_var}}")
if((lib_current STREQUAL lib_found) OR (lib_current STREQUAL lib_working))
set("${LIBRARY_VARIABLE}" "${lib_working}" PARENT_SCOPE)
return()
endif()
endif()
set("${found_var}" "${lib_current}" CACHE INTERNAL "...")
if(NOT lib_current STREQUAL "")
message(STATUS "Checking ${LIBRARY_NAME}: ${lib_current}")
endif()
# Check if we can link to the full path found by find_package.
try_link_library(${LIBRARY_NAME} "${lib_current}" ERRORLOG1)
if(CHECK_${LIBRARY_NAME}_LINK)
set("${working_var}" "${lib_current}" CACHE INTERNAL "...")
return()
endif()
# Check if the linker is smarter than cmake and try to link with only the library name.
string(REGEX REPLACE "(^|;)[^;]*/lib([^;/]*)\\.so" "\\1-l\\2" LIBRARY_FILE "${lib_current}")
if(NOT LIBRARY_FILE STREQUAL lib_current)
try_link_library(${LIBRARY_NAME} "${LIBRARY_FILE}" ERRORLOG2)
if(CHECK_${LIBRARY_NAME}_LINK)
message(STATUS " -> using ${LIBRARY_FILE} instead")
set("${LIBRARY_VARIABLE}" "${LIBRARY_FILE}" PARENT_SCOPE)
set("${working_var}" "${LIBRARY_FILE}" CACHE INTERNAL "...")
return()
endif()
endif()
# Force cmake to search again, as the cached library doesn't work.
unset(FIND_PACKAGE_MESSAGE_DETAILS_${ARGV2} CACHE)
unset(FIND_PACKAGE_MESSAGE_DETAILS_${LIBRARY_NAME} CACHE)
message(FATAL_ERROR "\n${ERRORLOG1}\n\n${ERRORLOG2}\n\n!! No suitable version of ${LIBRARY_NAME} found.\n Maybe you don't have the right (32 vs.64 bit) architecture installed?\n\n Tried ${lib_current} and ${LIBRARY_FILE}\n Using compiler ${CMAKE_CXX_COMPILER} ${CMAKE_CXX_FLAGS}\n\n\n")
endfunction(check_link_library)
function(force_recheck_library LIBRARY_NAME)
unset(FIND_PACKAGE_MESSAGE_DETAILS_${ARGV1} CACHE)
unset(FIND_PACKAGE_MESSAGE_DETAILS_${LIBRARY_NAME} CACHE)
unset(CHECK_${LIBRARY_NAME}_LINK CACHE)
endfunction()
|
