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if — CMake 3.23.0-rc2 Documentation if ¶ Conditionally execute a group of commands. Synopsis ¶ if (<condition>) <commands> elseif (<condition>) # optional block, can be repeated <commands> else () # optional block <commands> endif () Evaluates the condition argument of the if clause according to the Condition syntax described below.

Jul 02, 2018 · Step 2: See what CMakeLists.txt is by getting your hands dirty – on the Shell and/or IDE. Create a package in your catkin workspace (we won’t add any code here since it’s not needed for the demo). If you are using the ROS Development Studio and copied the ROS project, the package is already there! user:~/catkin_ws/src$ catkin_create_pkg ...

The elseif and else sections are optional. You may have multiple elseif clauses. Note that the expression in the else and endif clause is optional. Long ...

That's because the value of the option is stored in the cache ( CMakeCache.txt ). If you change the default value in the CMakeLists but the ...

If you change the default value in the CMakeLists but the actual value is already stored in the cache, it will just load the value from the cache. So to test the logic in your CMakeLists, delete the cache each time before re-running CMake.

if(DEFINED <name>|CACHE{<name>}|ENV{<name>}). True if a variable, cache variable or environment variable with given <name> is defined. The value of the variable does ...

28.01.2020 · 如果需要对项目进行有条件的编译，则需要用到if-else语句。 二、基本用法 比如需要根据操作系统执行不同的代码： # CMakeLists.txt # CMake最低版本要求 cmake_minimum_required(VERSION 3.5) # 项目名称 project(test_6) if(WIN32) message(STATUS "Now is windows") elseif(APPLE) message(STATUS "Now is Apple …

Jul 31, 2018 · which gives the next output on cmake path/to/CMakeLists.txt invocation: CMAKE_CXX_FLAGS_DEBUG 1: -g CMAKE_CXX_FLAGS_DEBUG 3: -g -- Configuring done -- Generating done -- Build files have been written to: current/dir Where is the second line? CMAKE_CXX_FLAGS_DEBUG 2: -g

さて、 if () コマンドおよび elseif () コマンドの引数には、そのブロックが実行される条件式を記述します。 この条件式には以下に示す種類があります。 ブール定数 CMakeの値はすべて文字列型ですが、この条件式の文脈では以下の値がBoolean値として認識されます。 また、これらの値は大文字・小文字の区別がされません。 真と解釈される値 0 でない数値 ON YES TRUE Y …

Finally, if no condition is true, commands in the optional else block are ... The following syntax applies to the condition argument of the if , elseif and ...

I tried to configure HYPRE 2.18.2 with CMake 3.15 and specified from command-line ... Wrong if-else syntax in main CMakeLists.txt #73.

libplctag/CMakeLists.txt. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters. # you choose. # License, v. 2.0.

如果需要对项目进行有条件的编译，则需要用到if-else语句。 二、基本用法. 比如需要根据操作系统执行不同的代码： # CMakeLists.txt # CMake最低版本要求 ...

Learn how to define variables with set and use them with the ${} operator for variable references. Learn the syntax for conditionals in CMake: if - elseif - ...

CMake also supports elseif to help sequentially test for multiple conditions. For example: if (MSVC80) # do something here elseif (MSVC90) # do something else elseif (APPLE) # do something else endif () The if command documents the many conditions it can test. Looping Constructs ¶

if / else / endif looks like this in CMake: minimal-cmake-if-else-endif-example.txt Copy to clipboard⇓ Download. if(myvar).

31.07.2021 · 如果需要对项目进行有条件的编译，则需要用到if-else语句。 二、基本用法 比如需要根据操作系统执行不同的代码： # CMakeLists.txt # CMake最低版本要求 cmake_minimum_required (VERSION 3.5 ) # 项目名称 project (test_6) if (WIN32) message (STATUS "Now is windows" ) elseif (APPLE) message (STATUS "Now is Apple systens." ) …

Conditional Statement (if) ... There are two allowable syntaxes: if(something) do something else(something) # the argument must match the if(...) ...

I had a similar problem and was able to solve it using a slightly different approach. I needed some compilation flags to be added in case cmake was invoked with an option from the command line (i.e cmake -DUSE_MY_LIB=ON).If the option was missing in the cmake invocation I wanted to go back to default case which was turning the option off.. I ran into the same issues, where the …

CMake has an if statement, though over the years it has become rather complex. ... syntax (the if statement historically predates variable expansion).