10.04.2019 · For example, to build with DEBUG_LOGGING enabled, we must call cmake like: cmake .. -DDEBUG_LOGGING = TRUE Targets Modern CMake is all about targets! The general rule of thumb is not to touch any variable in CMake (like CMAKE_CXX_FLAGS) directly but rather impose some requirements on a certain target.
FUBARTEST Worked string STREQUAL string works variable STREQUAL variable works ... And this example works only on Linux with CMake 3.16, but not on Windows:
You ran into a rather annoying "it's not a bug, it's a feature" behavior of CMake. As explained in the documentation of the if command:. The if command was written very early in CMake's history, predating the ${} variable evaluation syntax, and for convenience evaluates variables named by its arguments as shown in the above signatures.
On Mac OSX, if you use one of the package managers available to install your software, the most notable being MacPorts ( MacPorts) and Homebrew ( Homebrew ), you could also install CMake via one of them. For example, in case of MacPorts, typing the following sudo port install cmake
Both left and right hand arguments to STRLESS, STRGREATER, STREQUAL, STRLESS_EQUAL, and STRGREATER_EQUAL are independently tested to see if they are defined variables, if so their defined values are used otherwise the original value is used.
because there can be an unintended double expansion of the first argument if the variable A happens to be defined to a string which is also the name of a CMake variable, e.g.: set (A "d") set (d "some string") if ("$ {A}" STREQUAL "some string") # this branch will be taken message ("oops...") else () message ("fine") endif ()
Apr 08, 2019 · I tried to build the "hello" example with steps here, but failed with this: ☁ build [master] cmake .. -- Setting up Eosio Wasm Toolchain 1.6.1 at //usr/local CMake Warning (dev) in CMakeLists.txt: No cmake_minimum_required command is present. A line of code such as cmake_minimum_required (VERSION 3.12) should be added at the top of the file.
According to the CMake documentation, the STREQUAL comparison is allowed to take either a VARIABLE or a STRING as either parameter. So, in this example ...
The if command was written very early in CMake's history, predating the ${} variable evaluation syntax, and for convenience evaluates variables named by its arguments as shown in the above signatures.
CMake provides multiple ways of querying the environment with CMAKE_ variables, ... Here's a simple example: if(CMAKE_SYSTEM_NAME STREQUAL "Linux") ...
Unary tests such as EXISTS, COMMAND, and DEFINED. Binary tests such as EQUAL, LESS, LESS_EQUAL, GREATER, GREATER_EQUAL, STREQUAL, STRLESS, STRLESS_EQUAL, ...
CMake is a collection of open-source and cross-platform tools used to build and distribute software. In recent years it has become a de-facto standard for C and C++ applications, so the time has come for a lightweight introductory article on the subject.