Issue
How can I configure CMake to treat compiler warnings as errors during the build?
I am aware of the possibility to manually configure command line options for the compiler like -Werror through commands like target_compile_options, but I would prefer a portable solution that does not require fiddling with tool-dependent options.
Solution
This can be configured in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR target property.
For example, to enable warnings as errors for the my_app target you could write:
set_property(TARGET my_app PROPERTY COMPILE_WARNING_AS_ERROR ON)
You can also set a global default for all targets in your project via the CMAKE_COMPILE_WARNING_AS_ERROR variable:
set(CMAKE_COMPILE_WARNING_AS_ERROR ON)
add_executable(my_app1 [...])
add_executable(my_app2 [...])
add_executable(my_app3 [...])
Answered By - ComicSansMS Answer Checked By - Pedro (WPSolving Volunteer)