What about libtool-fortran itself?
Whoa, now I see it. There's some heavy string jumbling going on... libtool-fortran contains this definition:postdeps="-l -l -L/opt/pkg-gcc/4.9.4/lib/gcc/i386-pc-solaris2.11/4.9.4/amd64 -L/opt/pkg-gcc/4.9.4/lib/gcc/i386-pc-solaris2.11/4.9.4/../../../amd64 -L/lib/amd64 -L/usr/lib/amd64 -L/opt/pkg-gcc/4.9.4/lib/gcc/i386-pc-solaris2.11/4.9.4 -L/opt/pkg-gcc/4.9.4/lib/gcc/i386-pc-solaris2.11/4.9.4/../../.. -R/opt/pkg-gcc/4.9.4/lib/amd64 -lgfortran -lm -lgcc_s -lquadmath -lm -lgcc_s -lc -lgcc_s"
There's "-l -l" at the start that I totally missed. I looked for -lgfortran and didn't expect everything in between to get squashed.
-- Jörn Clausen Plattformen & Serverdienste BITS - Bielefelder IT-Servicezentrum