Slackware :: Can't Compile Agave - Gconfmm.h Error On 64 13.1

I'm trying to compile agave.

I had installed gconfmm using src2pkg.

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Now, when trying to compile agave:

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It did not spit out any errors:

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Agave configuration:

Agave will be compiled with the following features:

The following options will be passed to the compiler:

AGAVE_CFLAGS:

AGAVE_LIBS: -

Make, however, doesn't successfully finish:

Code:

I tried to find gconfmm.h. It seems it's not present on my system.