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Calling Fortran From C On Suns Under SunOS 4

On the SUN machines under SunOS 4.1.1 the "cc" command that is used to link a C main program which calls FORTRAN routines has changed. The changes are due to the facts that the -lI77 and -lU77 libraries have been merged into -lF77 and that the -lF77 and -lm libraries used by FORTRAN are now located in /usr/lang/SC1.0.

So what does this mean to you? It means that you need to make the following changes to your "cc" command:

Remove the "-lI77" and "-lU77" arguments

Add a "-L/usr/lang/SC1.0" before the "-lF77" argument

If you are using one of the floating point options listed below, then you need to add the corresponding library specification before the "-L/usr/lang/SC1.0":

Floating Point Option   Library Specification

-f68881                 -L/usr/lang/SC1.0/f68881
-ffpa                   -L/usr/lang/SC1.0/ffpa
-fpaplus                -L/usr/lang/SC1.0/ffpaplus
-fsoft                  -L/usr/lang/SC1.0/fsoft
-fswitch                -L/usr/lang/SC1.0/fswitch

For example, if you used to use one of the commands:

   cc main.c fortran.o  -lF77 -lI77 -lU77 -lm

   cc -fswitch main.c fortran.o  -limsl -lF77 -lI77 -lU77 -lm

now under SunOS 4.1.1 you would use the corresponding command:

   cc main.c fortran.o  -L/usr/lang/SC1.0 -lF77 -lm

   cc -fswitch main.c fortran.o  -limsl -L/usr/lang/SC1.0/fswitch
   -L/usr/lang/SC1.0  -lF77 -lm

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