Build Cmake Platforms

[junxnone]

Reference

• Platform Checking

Brief

• Platform Variables
• CMake System Variables
  • CMAKE_SYSTEM
  • CMAKE_SYSTEM_NAME
  • CMAKE_SYSTEM_VERSION
  • CMAKE_SYSTEM_PROCESSOR
  • CMAKE_HOST_SYSTEM_NAME
• Compiler Checking
  • CMAKE_<LANG>_COMPILER_ID
  • CMAKE_<LANG>_COMPILER_VERSION
  • CMAKE_<LANG>_COMPILER
  • CMAKE_<LANG>_COMPILER_LOADED

Platform Variables	Description
UNIX	is TRUE on all UNIX-like OS's, including Apple OS X and CygWin
WIN32	is TRUE on Windows. Prior to 2.8.4 this included CygWin
APPLE	is TRUE on Apple systems. Note this does not imply the system is Mac OS X, only that APPLE is #defined in C/C++ header files.
MINGW	is TRUE when using the MinGW compiler in Windows
MSYS	is TRUE when using the MSYS developer environment in Windows
CYGWIN	is TRUE on Windows when using the CygWin version of cmake

CMAKE_SYSTEM_NAME	Environments Where Seen
Windows	Windows (Visual Studio, MinGW GCC)
Darwin	macOS/OS X (Clang, GCC)
Linux	Linux (GCC, Intel, PGI)
Android	Android NDK (GCC, Clang)
FreeBSD	FreeBSD
CrayLinuxEnvironment	Cray supercomputers (Cray compiler)
MSYS	Windows (MSYS2 shell native GCC)

Examples

message(STATUS "CMAKE_SYSTEM IS ${CMAKE_SYSTEM}")
message(STATUS "CMAKE_SYSTEM_NAME IS ${CMAKE_SYSTEM_NAME}")
message(STATUS "CMAKE_SYSTEM_VERSION IS ${CMAKE_SYSTEM_VERSION}")
message(STATUS "CMAKE_SYSTEM_PROCESSOR IS ${CMAKE_SYSTEM_PROCESSOR}")
message(STATUS "CMAKE_HOST_SYSTEM_NAME IS ${CMAKE_HOST_SYSTEM_NAME}")
message(STATUS "UNIX IS  ${UNIX}")
message(STATUS "CMAKE_C_COMPILER_ID IS  ${CMAKE_C_COMPILER_ID}")
message(STATUS "CMAKE_CXX_COMPILER_ID IS  ${CMAKE_CXX_COMPILER_ID}")
message(STATUS "CMAKE_C_COMPILER_VERSION IS  ${CMAKE_C_COMPILER_VERSION}")
message(STATUS "CMAKE_CXX_COMPILER_VERSION IS  ${CMAKE_CXX_COMPILER_VERSION}")
message(STATUS "CMAKE_C_COMPILER IS  ${CMAKE_C_COMPILER}")
message(STATUS "CMAKE_CXX_COMPILER IS  ${CMAKE_CXX_COMPILER}")
message(STATUS "CMAKE_C_COMPILER_LOADED IS  ${CMAKE_C_COMPILER_LOADED}")
message(STATUS "CMAKE_CXX_COMPILER_LOADED IS  ${CMAKE_CXX_COMPILER_LOADED}")

• Linux

  -- CMAKE_SYSTEM IS Linux-5.11.0-40-generic
  -- CMAKE_SYSTEM_NAME IS Linux
  -- CMAKE_SYSTEM_VERSION IS 5.11.0-40-generic
  -- CMAKE_SYSTEM_PROCESSOR IS x86_64
  -- CMAKE_HOST_SYSTEM_NAME IS Linux
  -- UNIX IS  1
  -- CMAKE_C_COMPILER_ID IS  GNU
  -- CMAKE_CXX_COMPILER_ID IS  GNU
  -- CMAKE_C_COMPILER_VERSION IS  9.3.0
  -- CMAKE_CXX_COMPILER_VERSION IS  9.3.0
  -- CMAKE_C_COMPILER IS  /usr/bin/cc
  -- CMAKE_CXX_COMPILER IS  /usr/bin/c++
  -- CMAKE_C_COMPILER_LOADED IS  1
  -- CMAKE_CXX_COMPILER_LOADED IS  1

• Windows

  -- CMAKE_SYSTEM IS Windows-10.0.19042
  -- CMAKE_SYSTEM_NAME IS Windows
  -- CMAKE_SYSTEM_VERSION IS 10.0.19042
  -- CMAKE_SYSTEM_PROCESSOR IS AMD64
  -- CMAKE_HOST_SYSTEM_NAME IS Windows
  -- UNIX IS
  -- WIN32 IS  1
  -- CMAKE_C_COMPILER_ID IS  MSVC
  -- CMAKE_CXX_COMPILER_ID IS  MSVC
  -- CMAKE_C_COMPILER_VERSION IS  19.28.29914.0
  -- CMAKE_CXX_COMPILER_VERSION IS  19.28.29914.0
  -- CMAKE_C_COMPILER IS  C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.28.29910/bin/Hostx64/x64/cl.exe
  -- CMAKE_CXX_COMPILER IS  C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.28.29910/bin/Hostx64/x64/cl.exe
  -- CMAKE_C_COMPILER_LOADED IS  1
  -- CMAKE_CXX_COMPILER_LOADED IS  1