1 # This file is part of lyx.
3 # The module comes from the enblend project, slightly modified.
5 # Check if compiler supports C++11 features
6 # and which compiler switches are necessary
7 # CXX11_FLAG : contains the necessary compiler flag
10 # Copyright (c) 2013 Thomas Modes <tmodes@@users.sourceforge.net>
12 # Redistribution and use in source and binary forms, with or without
13 # modification, are permitted provided that the following conditions
16 # 1. Redistributions of source code must retain the copyright
17 # notice, this list of conditions and the following disclaimer.
18 # 2. Redistributions in binary form must reproduce the copyright
19 # notice, this list of conditions and the following disclaimer in the
20 # documentation and/or other materials provided with the distribution.
21 # 3. The name of the author may not be used to endorse or promote products
22 # derived from this software without specific prior written permission.
24 # This file is distributed in the hope that it will be useful,
25 # but WITHOUT ANY WARRANTY; without even the implied warranty of
26 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 # GNU General Public License for more details.
29 # You should have received a copy of the GNU General Public License
30 # along with lyx; if not, write to the Free Software
31 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 INCLUDE(CheckCXXSourceCompiles)
35 INCLUDE(FindPackageHandleStandardArgs)
37 if (CMAKE_CXX_COMPILER_ID MATCHES "^[cC]lang$")
38 set(CXX11_FLAG_CANDIDATES "--std=c++11 -Wno-deprecated-register")
41 set(CXX11_FLAG_CANDIDATES "--std=gnu++11")
44 # MSVC does not have a general C++11 flag, one can only switch off
45 # MS extensions with /Za in general or by extension with /Zc.
46 # Use an empty flag to ensure that CXX11_STD_REGEX is correctly set.
47 set(CXX11_FLAG_CANDIDATES "noflagneeded")
49 set(CXX11_FLAG_CANDIDATES
59 # sample openmp source code to test
65 static_assert(sizeof(int) <= sizeof(T), \"not big enough\");
68 typedef check<check<bool>> right_angle_brackets;
73 TestDeleted() = delete;
80 typedef check<int> check_type;
82 check_type&& cr = static_cast<check_type&&>(c);
91 # The following code snipped taken from example in http://stackoverflow.com/questions/8561850/compile-stdregex-iterator-with-gcc
99 typedef std::regex_iterator<const char *> Myiter;
102 const char *pat = \"axayaz\";
103 Myiter::regex_type rx(\"a\");
104 Myiter next(pat, pat + strlen(pat), rx);
112 set(SAFE_CMAKE_REQUIRED_QUIET ${CMAKE_REQUIRED_QUIET})
113 set(CMAKE_REQUIRED_QUIET ON)
114 SET(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
115 FOREACH(FLAG ${CXX11_FLAG_CANDIDATES})
116 IF(NOT "${FLAG}" STREQUAL "noflagneeded")
117 SET(CMAKE_REQUIRED_FLAGS "${FLAG}")
119 UNSET(CXX11_FLAG_DETECTED CACHE)
120 CHECK_CXX_SOURCE_COMPILES("${CXX11_TEST_SOURCE}" CXX11_FLAG_DETECTED)
121 IF(CXX11_FLAG_DETECTED)
122 SET(CXX11_FLAG "${FLAG}")
123 message(STATUS "CXX11_FLAG_DETECTED = \"${FLAG}\"")
125 check_cxx_source_compiles("${REGEX_TEST_SOURCE}" CXX_STD_REGEX_DETECTED)
126 if (CXX_STD_REGEX_DETECTED)
127 message(STATUS "Compiler supports std_regex")
128 set(CXX11_STD_REGEX ON)
130 message(STATUS "Compiler does not support std_regex")
131 set(CXX11_STD_REGEX OFF)
136 SET(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
137 set(CMAKE_REQUIRED_QUIET ${SAFE_CMAKE_REQUIRED_QUIET})
139 # handle the standard arguments for find_package
140 FIND_PACKAGE_HANDLE_STANDARD_ARGS(CXX11Compiler DEFAULT_MSG CXX11_FLAG)
141 IF("${CXX11_FLAG}" STREQUAL "noflagneeded")
145 MARK_AS_ADVANCED(CXX11_FLAG CXX11_STD_REGEX)