jagannat@caip.rutgers.edu (Subbarao Jagannatha) (12/12/90)
Hi,
Here is my problem. Please help.
I have a C main program (model.c) which calls the fortran
program (qdsb.f). The fortran program was obtained by converting
VMS fortran to SUN fortran using f77cvt command.
When I compile and link both C and Fortran with f77 command,
I am getting the following run-time error message:
"signal SEGV (segmentation violation)"
In debug mode with "where" option :
---------------------------------------------------------------
signal SEGV (segmentation violation) in c_sfe at 0x2257c
c_sfe+0x200: st %g0, [%o4 + 548]
(dbx) c_sfe() at 0x2257c
s_wsFe() at 0x226b0
inside_() at 0x1185c
qdsb_() at 0x9db4
show(op = 2, wd = 3, obj = 0), line 641 in "model.c"
sub_object(e_obj = 2), line 202 in "model.c"
design(), line 177 in "model.c"
main(), line 93 in "model.c"
-----------------------------------------------------------
The problem seems to be in WRITE statement of fortran. Because
it gives segmentation violation at all WRITE statements.
Also I cannot trace or step through the fortran code in the debug mode.
Sometimes when I give run command,the following message appears:
"can't write to process (address 0x0)
(perhaps you are already debugging this file?)"
Any solutions ?
Another problem:
If the program is created using the following makefile:
(Here I am using 'cc' instead of 'f77' for compiling and linking.
I am not sure which one is correct to use for compilation and linking)
-----------------------------------------------------------
model: model.o qdsb.o drawaxes.o pltsb.o
cc -o model -g model.o qdsb.o drawaxes.o pltsb.o -lF77 -lI77 -lU77 -lc -lm
model.o: model.c
cc -c -g model.c
qdsb.o: qdsb.f
cc -c -g qdsb.f
drawaxes.o: drawaxes.f
cc -c -g drawaxes.f
pltsb.o: pltsb.f
cc -c -g pltsb.f
--------------------------------------------------------------
In the beginning of debug mode, I get the message:
Warning:Object file read error, text address not found.
Hence I could not use debug. Do I have to use any other
options ?
I could not get any clues to this from sun fortran manual.
Thanks in advance,
Jagannatha.
email: jagannat@caip.rutgers.edu