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
|
#
# Check if a given C++ source code compiles
#
# VAR - Variable to set to 1 or 0, depending on the result
# MESSAGE - Description of the thing that we are checking for
# SOURCE - Code to compile
#
# All extra arguments are passed to try_compile().
#
macro(DCMTK_TRY_COMPILE VAR MESSAGE SOURCE)
set(DCMTK_TRY_COMPILE_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx")
# Do nothing if the variable is already set
if(NOT DEFINED "${VAR}")
message(STATUS "Checking whether ${MESSAGE}")
file(WRITE "${DCMTK_TRY_COMPILE_FILE}" "${SOURCE}\n")
if(DCMTK_TRY_COMPILE_REQUIRED_CMAKE_FLAGS)
set(DCMTK_TRY_COMPILE_CMAKE_FLAGS CMAKE_FLAGS ${DCMTK_TRY_COMPILE_REQUIRED_CMAKE_FLAGS})
else()
DCMTK_UNSET(DCMTK_TRY_COMPILE_CMAKE_FLAGS)
endif()
try_compile(${VAR}
"${CMAKE_BINARY_DIR}"
"${DCMTK_TRY_COMPILE_FILE}"
${DCMTK_TRY_COMPILE_CMAKE_FLAGS}
OUTPUT_VARIABLE OUTPUT
${ARGN})
if(${VAR})
message(STATUS "Checking whether ${MESSAGE} -- yes")
set(${VAR} 1 CACHE INTERNAL "${MESSAGE}")
file(APPEND "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log"
"${MESSAGE} passed with the following output:\n"
"${OUTPUT}\n")
else()
message(STATUS "Checking whether ${MESSAGE} -- no")
set(${VAR} 0 CACHE INTERNAL "${MESSAGE}")
file(APPEND "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log"
"${MESSAGE} failed with the following output:\n"
"${OUTPUT}\n")
endif()
endif()
endmacro()
|
