1 # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
2 # file Copyright.txt or https://cmake.org/licensing for details.
4 #-----------------------------------------------------------------------------
5 # set some special flags for different compilers
7 if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Intel")
11 if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Clang"
12 AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
13 set(_CLANG_MSVC_WINDOWS 1)
16 # Disable deprecation warnings for standard C functions.
17 # really only needed for newer versions of VS, but should
18 # not hurt other versions, and this will work into the
20 if(MSVC OR _INTEL_WINDOWS OR _CLANG_MSVC_WINDOWS)
21 add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE)
26 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stack:10000000")
29 if(_CLANG_MSVC_WINDOWS AND "x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
30 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Xlinker -stack:20000000")
33 #silence duplicate symbol warnings on AIX
34 if(CMAKE_SYSTEM_NAME MATCHES "AIX")
35 if(NOT CMAKE_COMPILER_IS_GNUCXX)
36 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -bhalt:5 ")
40 if(CMAKE_SYSTEM MATCHES "OSF1-V")
41 if(NOT CMAKE_COMPILER_IS_GNUCXX)
42 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -timplicit_local -no_implicit_include ")
46 # Workaround for short jump tables on PA-RISC
47 if(CMAKE_SYSTEM_PROCESSOR MATCHES "^parisc")
48 if(CMAKE_COMPILER_IS_GNUCC)
49 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mlong-calls")
51 if(CMAKE_COMPILER_IS_GNUCXX)
52 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mlong-calls")
56 # Workaround for TOC Overflow on ppc64
57 if(CMAKE_SYSTEM_NAME STREQUAL "AIX" AND
58 CMAKE_SYSTEM_PROCESSOR MATCHES "powerpc")
59 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-bbigtoc")
60 elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND
61 CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64")
62 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-multi-toc")
65 if (CMAKE_CXX_COMPILER_ID STREQUAL SunPro AND
66 NOT DEFINED CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION)
67 if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.13)
68 if (NOT CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD EQUAL 98)
69 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++03")
70 elseif(CMAKE_VERSION VERSION_LESS 3.8.20170502)
71 # CMake knows how to add this flag for compilation as C++11,
72 # but has not been taught that SunPro needs it for linking too.
73 # Add it in a place that will be used for both.
74 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
77 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -library=stlport4")
82 # Suppress warnings from PGI compiler.
83 if (CMAKE_${lang}_COMPILER_ID STREQUAL "PGI")
84 set(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -w")
88 # use the ansi CXX compile flag for building cmake
89 if (CMAKE_ANSI_CXXFLAGS)
90 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_ANSI_CXXFLAGS}")
93 if (CMAKE_ANSI_CFLAGS)
94 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_ANSI_CFLAGS}")
97 # Allow per-translation-unit parallel builds when using MSVC
98 if(CMAKE_GENERATOR MATCHES "Visual Studio" AND
99 (CMAKE_C_COMPILER_ID MATCHES "MSVC|Intel" OR
100 CMAKE_CXX_COMPILER_ID MATCHES "MSVC|Intel"))
102 set(CMake_MSVC_PARALLEL ON CACHE STRING "\
103 Enables /MP flag for parallel builds using MSVC. Specify an \
104 integer value to control the number of threads used (Only \
105 works on some older versions of Visual Studio). Setting to \
106 ON lets the toolchain decide how many threads to use. Set to \
107 OFF to disable /MP completely." )
109 if(CMake_MSVC_PARALLEL)
110 if(CMake_MSVC_PARALLEL GREATER 0)
111 string(APPEND CMAKE_C_FLAGS " /MP${CMake_MSVC_PARALLEL}")
112 string(APPEND CMAKE_CXX_FLAGS " /MP${CMake_MSVC_PARALLEL}")
114 string(APPEND CMAKE_C_FLAGS " /MP")
115 string(APPEND CMAKE_CXX_FLAGS " /MP")