forked from Kitware/VTK
/
vtkCompilerExtras.cmake
61 lines (51 loc) · 2.49 KB
/
vtkCompilerExtras.cmake
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
if(CMAKE_COMPILER_IS_GNUCXX)
include(CheckCXXCompilerFlag)
# Addtional warnings for GCC
set(CMAKE_CXX_FLAGS_WARN "-Wnon-virtual-dtor -Wno-long-long -ansi -Wcast-align -Wchar-subscripts -Wall -Wextra -Wpointer-arith -Wformat-security -Woverloaded-virtual -Wshadow -Wunused-parameter -fno-check-new -fno-common")
# This flag is useful as not returning from a non-void function is an error
# with MSVC, but it is not supported on all GCC compiler versions
check_cxx_compiler_flag(-Werror=return-type HAVE_GCC_ERROR_RETURN_TYPE)
if(HAVE_GCC_ERROR_RETURN_TYPE)
set(CMAKE_CXX_FLAGS_ERROR "-Werror=return-type")
endif()
# If we are compiling on Linux then set some extra linker flags too
if(CMAKE_SYSTEM_NAME MATCHES Linux)
set(CMAKE_SHARED_LINKER_FLAGS
"-Wl,--fatal-warnings -Wl,--no-undefined -lc ${CMAKE_SHARED_LINKER_FLAGS}")
set(CMAKE_MODULE_LINKER_FLAGS
"-Wl,--fatal-warnings -Wl,--no-undefined -lc ${CMAKE_SHARED_LINKER_FLAGS}")
set (CMAKE_EXE_LINKER_FLAGS
"-Wl,--fatal-warnings -Wl,--no-undefined -lc ${CMAKE_SHARED_LINKER_FLAGS}")
endif()
# Now check if we can use visibility to selectively export symbols
execute_process(COMMAND ${CMAKE_C_COMPILER} --version
OUTPUT_VARIABLE _gcc_version_info
ERROR_VARIABLE _gcc_version_info)
string (REGEX MATCH "[345]\\.[0-9]\\.[0-9]"
_gcc_version "${_gcc_version_info}")
if(NOT _gcc_version)
string (REGEX REPLACE ".*\\(GCC\\).* ([34]\\.[0-9]) .*" "\\1.0"
_gcc_version "${_gcc_version_info}")
endif()
# GCC visibility support, on by default and in testing.
check_cxx_compiler_flag(-fvisibility=hidden HAVE_GCC_VISIBILITY)
option(VTK_USE_GCC_VISIBILITY "Use GCC visibility support if available." OFF)
mark_as_advanced(VTK_USE_GCC_VISIBILITY)
if(${_gcc_version} VERSION_GREATER 4.2.0 AND BUILD_SHARED_LIBS
AND HAVE_GCC_VISIBILITY AND VTK_USE_GCC_VISIBILITY
AND NOT MINGW AND NOT CYGWIN)
# Should only be set if GCC is newer than 4.2.0
set(VTK_ABI_CXX_FLAGS "-fvisibility=hidden -fvisibility-inlines-hidden")
else()
set(VTK_ABI_CXX_FLAGS "")
endif()
# Set up the debug CXX_FLAGS for extra warnings
option(VTK_EXTRA_COMPILER_WARNINGS
"Add compiler flags to do stricter checking when building debug." OFF)
if(VTK_EXTRA_COMPILER_WARNINGS)
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO
"${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${CMAKE_CXX_FLAGS_WARN}")
set(CMAKE_CXX_FLAGS_DEBUG
"${CMAKE_CXX_FLAGS_DEBUG} ${CMAKE_CXX_FLAGS_WARN} ${CMAKE_CXX_FLAGS_ERROR}")
endif()
endif()