If you want to build an executable / library with debug symbols in CMake, run
cmake -DCMAKE_BUILD_TYPE=Debug . make
Conversely, if you want to build an executable / library in release mode, run
cmake -DCMAKE_BUILD_TYPE=Release . make
13
Jun
2019
CMake
08
Jun
2019
How to change CMake object file suffix from default ‘.o’
In order to configure CMake to use an alternate object file suffix (default: .o on Linux) use these lines in your CMakeLists.txt:
set(CMAKE_C_OUTPUT_EXTENSION ".rel") set(CMAKE_CXX_OUTPUT_EXTENSION ".rel")
This example changes the output extension from .o to .rel (which is required for the SDCC compiler). Be sure to replace ".rel" by your desired output suffix.
Note that in order for these to take effect, you might need to completely remove CMakeCache.txt, CMakeFiles & cmake_install.cmake:
rm -rf CMakeCache.txt CMakeFiles cmake_install.cmake
08
Jun
2019
A working SDCC STM8 CMake configuration
If you have been looking desperately for a working CMake example for the SDCC compiler for STM8 microcontrollers here’s my take on it:
cmake_minimum_required(VERSION 3.2) set(CMAKE_C_OUTPUT_EXTENSION ".rel") set(CMAKE_C_COMPILER sdcc) set(CMAKE_SYSTEM_NAME Generic) # No linux target etc # Prevent default configuration set(CMAKE_C_FLAGS_INIT "") set(CMAKE_EXE_LINKER_FLAGS_INIT "") project(STM8Blink C) SET(CMAKE_C_FLAGS "-mstm8 --std-c99") add_executable(main.ihx main.c) # Flash targets add_custom_target(flash ALL COMMAND stm8flash -c stlink -p stm8s105c6 -w main.ihx)
This will build main.ihx from main.c. main.ihx is a Intel Hex file which can be directly flashed using stm8flash.
The last lines setup make flash ; you might need to use the correct microcontroller (stm8s105c6 in this example, run stm8flash -l to show supported devices) and the correct flash adapter (stlink, stlinkv2, stlinkv21, stlinkv3 or espstlink).
The setup example shown here is for the STM8S eval board.
I suppose it can be easily modified for other microcontrollers, but I haven’t tried that so far.
07
Jun
2019
How to fix CMake ‘make: *** No targets specified and no makefile found. Stop.’
Problem:
You are trying to build a software that is using the CMake build system.
You are trying to run make to build, but you see this error message:
make: *** No targets specified and no makefile found. Stop.
Solution:
Before running make, you need to configure your build using CMake.
The simplest way of doing that is to run
cmake .
Typically you only need to do that once for each project ; CMake will automatically detect changes to CMakeLists.txt when you run make.
After that, you can run make again. If the build is successful, you’ll see a message like this:
[ 50%] Building CXX object CMakeFiles/main.dir/main.cpp.o [100%] Linking CXX executable main [100%] Built target main
07
Jun
2019
How to fix CMake Parse error: Expected a command name, got unquoted argument with text "//"
Problem:
You want to build an application using CMake but you see an error message like this:
CMake Error at CMakeLists.txt:1: Parse error. Expected a command name, got unquoted argument with text "//". -- Configuring incomplete, errors occurred! See also "/ram/CMakeFiles/CMakeOutput.log". Makefile:176: recipe for target 'cmake_check_build_system' failed make: *** [cmake_check_build_system] Error 1
Solution:
You CMakeLists.txt likely looks like this:
// Create main executable add_executable(main main.cpp)
The issue is in the first line:
// Create main executable
CMake comments start with #, not with // !
Change any comment line starting with // to start with # instead. In our example:
# Create main executable add_executable(main main.cpp)
Then try building again (e.g. using cmake . or make). Unless you have other issues in your CMake configuration, the output should now look like this (for simple builds):
-- Configuring done -- Generating done -- Build files have been written to: /ram [100%] Built target main
17
Apr
2019
Minimal CMakeLists.txt for executables
This is the minimal CMakeLists.txt for building an executable named myproject from main.cpp:
cmake_minimum_required (VERSION 2.8.11) project (MyProject) add_executable (myproject main.cpp)