CODEWITHSUNDEEP
tcl
sakthivp
sakthivp

Reputation: 21

Compiling TCL libraries with TCL_MEM_DEBUG

I compiled TCL libraries with mem flag. But when i tried to use the libraries on my application i couldn't see any message in the console. will the trace messages out to standardard output(terminal) or will there be any log files to log the messages?

Upvotes: 0

Views: 135

Answers (1)

Donal Fellows
Donal Fellows

Reputation: 137627

When you compile Tcl with the memory debugging enabled (using a Posix configuration style, this means that you passed in --enable-symbols=mem or --enable-symbols=all to configure; I'm not certain about what happens with Windows) there is a substantial amount of extra checking of memory allocation handling by default, and an extra Tcl command — memory — is defined. Some memory subcommands do cause messages to be written to stderr; you'll need to be running inside a suitable console in order to see them, and this can be something of an issue on Windows if you are not aware of it. Other commands will dump things to a named file.

FWIW, when developing Tcl I usually build with --enable-symbols=all except when doing performance testing. The various debugging options are known to have substantial impacts on the speed of Tcl's implementation (which is why it is a compile option rather than being always present, and consequently why the interface is rather rougher than for the rest of Tcl).

Upvotes: 2

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