link error compiling GIMP plugin

[Frank]

I am trying to compile the FocusBlue plugin for GIMP on Fedora 19.
The make file spits out this error when linking:


/usr/bin/ld: diffusion.o: undefined reference to symbol 'expf@@GLIBC_2.0'
/usr/bin/ld: note: 'expf@@GLIBC_2.0' is defined in DSO /lib/libm.so.6 so 
try adding it to the linker command line
/lib/libm.so.6: could not read symbols: Invalid operation


Can anyone help?

Thanks
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