问题
I use CMake with GNU Make and would like to see all commands exactly (for example how the compiler is executed, all the flags etc.).
GNU make has --debug, but it does not seem to be that helpful are there any other options? Does CMake provide additional flags in the generated Makefile for debugging purpose?
回答1:
When you run make, add VERBOSE=1 to see the full command output. For example:
cmake .
make VERBOSE=1
Or you can add -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON to the cmake command for permanent verbose command output from the generated Makefiles.
cmake -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON .
make
To reduce some possibly less-interesting output you might like to use the following options. The option CMAKE_RULE_MESSAGES=OFF removes lines like [ 33%] Building C object..., while --no-print-directory tells make to not print out the current directory filtering out lines like make[1]: Entering directory and make[1]: Leaving directory.
cmake -DCMAKE_RULE_MESSAGES:BOOL=OFF -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON .
make --no-print-directory
回答2:
It is convenient to set the option in the CMakeLists.txt file as:
set(CMAKE_VERBOSE_MAKEFILE ON)
回答3:
If you use the CMake GUI then swap to the advanced view and then the option is called CMAKE_VERBOSE_MAKEFILE.
回答4:
Or simply export VERBOSE environment variable on the shell like this:
export VERBOSE=1
回答5:
I was trying something similar to ensure the -ggdb flag was present.
Call make in a clean directory and grep the flag you are looking for. Looking for debug rather than ggdb I would just write.
make VERBOSE=1 | grep debug
The -ggdb flag was obscure enough that only the compile commands popped up.
来源：https://stackoverflow.com/questions/2670121/using-cmake-with-gnu-make-how-can-i-see-the-exact-commands