1#.rst: 2# GetMSVCVersion 3# -------------- 4# 5# 6# 7# get_msvc_major_version(<var>) 8# get_msvc_minor_version(<var>) 9# get_msvc_combined_major_minor_version(<var>) 10# get_msvc_major_minor_version(<major_var> <minor_var>) 11# get_msvc_unique_decimal_version(<var>) 12# 13# This family of functions is designed to be used to convert 14# MSVC_VERSION from the compiler version number to the Visual Studio 15# decimal version number (2012 is 11.0, 2015 is 14.0). All take a name 16# of a variable in <var> to return their results in. 17# 18# Consider Visual Studio 2013, which reports 1800 in MSVC_VERSION (and 19# the _MSC_VER preprocessor macro). It is also known as VS 12 or 12.0. 20# (Minor versions are rarely used, except in the case of 7.1 aka 21# VS.NET 2003) The functions would return this output for 2013: 22# 23# get_msvc_major_version: 12 24# get_msvc_minor_version: 0 25# get_msvc_combined_major_minor_version: 120 26# get_msvc_major_minor_version: 12 in <major_var>, 0 in <minor_var> 27# get_msvc_unique_decimal_version: 12 (this returns with a decimal and 28# minor when needed to be precise, e.g. 7.1) 29# 30# The variable is not modified if not building with MSVC. 31 32#============================================================================= 33# Copyright 2015 Ryan Pavlik <ryan.pavlik@gmail.com> 34# 35# Distributed under the OSI-approved BSD License (the "License"); 36# see below. 37# 38# This software is distributed WITHOUT ANY WARRANTY; without even the 39# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 40# See the License for more information. 41#============================================================================= 42# 43# Redistribution and use in source and binary forms, with or without 44# modification, are permitted provided that the following conditions 45# are met: 46# 47# * Redistributions of source code must retain the above copyright 48# notice, this list of conditions and the following disclaimer. 49# 50# * Redistributions in binary form must reproduce the above copyright 51# notice, this list of conditions and the following disclaimer in the 52# documentation and/or other materials provided with the distribution. 53# 54# * Neither the names of Kitware, Inc., the Insight Software Consortium, 55# nor the names of their contributors may be used to endorse or promote 56# products derived from this software without specific prior written 57# permission. 58# 59# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 60# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 61# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 62# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 63# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 64# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 65# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 66# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 67# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 68# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 69# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 70#============================================================================= 71 72# This function serves as the main implementation, with the others just 73# tweaking the result. 74function(get_msvc_combined_major_minor_version _var) 75 if(NOT MSVC) 76 return() 77 endif() 78 math(EXPR _vs_ver "${MSVC_VERSION} / 10 - 60") 79 80 # VS 2015 changed the pattern because they skipped VS 13 81 if(_vs_ver GREATER 120) 82 math(EXPR _vs_ver "${_vs_ver} + 10") 83 endif() 84 set(${_var} ${_vs_ver} PARENT_SCOPE) 85endfunction() 86 87# This function is also used as backend to some implementation, though 88# its contents are simpler, no real business logic to speak of. 89function(get_msvc_major_minor_version _major_var _minor_var) 90 if(NOT MSVC) 91 return() 92 endif() 93 get_msvc_combined_major_minor_version(_vs_ver) 94 95 math(EXPR _vs_minor "${_vs_ver} % 10") 96 math(EXPR _vs_major "(${_vs_ver} - ${_vs_minor}) / 10") 97 set(${_major_var} ${_vs_major} PARENT_SCOPE) 98 set(${_minor_var} ${_vs_minor} PARENT_SCOPE) 99endfunction() 100 101function(get_msvc_major_version _var) 102 if(NOT MSVC) 103 return() 104 endif() 105 get_msvc_major_minor_version(_vs_ver _dummy) 106 set(${_var} ${_vs_ver} PARENT_SCOPE) 107endfunction() 108 109function(get_msvc_minor_version _var) 110 if(NOT MSVC) 111 return() 112 endif() 113 get_msvc_major_minor_version(_dummy _vs_ver) 114 set(${_var} ${_vs_ver} PARENT_SCOPE) 115endfunction() 116 117function(get_msvc_unique_decimal_version _var) 118 if(NOT MSVC) 119 return() 120 endif() 121 get_msvc_major_minor_version(_vs_major _vs_minor) 122 set(_vs_ver ${_vs_major}) 123 if(_vs_minor GREATER 0) 124 set(_vs_ver "${_vs_ver}.${_vs_minor}") 125 endif() 126 set(${_var} ${_vs_ver} PARENT_SCOPE) 127endfunction() 128