errors while using -lgfortran instead of libg2c.a

["satyaakam goswami" <satyaakam@xxxxxxxxx>]

we getting undefined symbol:`d_sign', please suggest.

/tsi71/pubref/liba/lnx86_gcc_ia32/liblapack.a
/tsi71/pubref/liba/lnx86_gcc_ia32/libblas.a
/tsi71/pubref/liba/lnx86_gcc_ia32/liblamatrix++.a    -lm -lgfortran
/tsi71/pubref/liba/lnx86_gcc_ia32/liblapack++.a(dtimmg.o): In function
`dtimmg_':
dtimmg.c:(.text+0xe47): undefined reference to `d_sign'
dtimmg.c:(.text+0xf11): undefined reference to `d_sign'
dtimmg.c:(.text+0x1004): undefined reference to `d_sign'
dtimmg.c:(.text+0x10de): undefined reference to `d_sign'
dtimmg.c:(.text+0x120d): undefined reference to `d_sign'

Satya