For example during use make or b2 you can't see command, because build system  invokes gcc implicitly. I want to know full command, which build system send to compiler. conceptually. I want to catch up it independently on build system. Maybe on system level, maybe do you know another way.
OS: linux.
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        an81
        
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                    2It should be there in your makefile. – Steephen Feb 08 '16 at 15:25
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                    Possible duplicate of [Making make print commands before executing when NOT using CMake](http://stackoverflow.com/questions/11004695/making-make-print-commands-before-executing-when-not-using-cmake) – MTCoster Feb 08 '16 at 16:33
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                    no, I want to catch up command on system layer. Independently on build system. – an81 Feb 08 '16 at 17:07
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                    I don't know what kind of build system will be used. Just wanna to know, which build command was sent to gcc. how to capture build command on system layer? – an81 Feb 09 '16 at 16:16