gcc error on a code can be properly compiled by cc and g77

Question

There is an example C code linking to two static libraries. This code is compiled via a Makefile. The makefile generates first of all an object file from source file, and then covert it to an executable file via the following commands. In addition, links two libraries to the compiled code:

cc -I.  -DUNIX -c cademo1.c
g77  -o cademo1 cademo1.o ../libChemAppC.a ../libLChemApp.a 

These two commands are the output of the Makefile. If I can run them by my own, they work.

Now, I need to compile the code by gcc:

$ gcc -static cademo1.c -L.. -lChemAppC -lLChemApp -o cademo1

But it makes hundreds of such errors:

.
.
.
rtrnshdr.f:(.text+0x1551): undefined reference to `s_rsue'
rtrnshdr.f:(.text+0x1564): undefined reference to `do_uio'
rtrnshdr.f:(.text+0x156c): undefined reference to `e_rsue'
../libLChemApp.a(bindummy.o): In function `tqhbix_':
bindummy.f:(.text+0x11): undefined reference to `s_copy'
../libLChemApp.a(dt.o): In function `tqdtforid_':
dt.f:(.text+0x11): undefined reference to `s_copy'
../libLChemApp.a(dt.o): In function `tqhdt_':
dt.f:(.text+0x5c): undefined reference to `G77_date_and_time_0'
dt.f:(.text+0x86): undefined reference to `s_wsfi'
dt.f:(.text+0x99): undefined reference to `do_fio'
dt.f:(.text+0xad): undefined reference to `do_fio'
dt.f:(.text+0xc3): undefined reference to `do_fio'
dt.f:(.text+0xd7): undefined reference to `do_fio'
dt.f:(.text+0xed): undefined reference to `do_fio'
../libLChemApp.a(dt.o):dt.f:(.text+0x101): more undefined references to `do_fio' follow
../libLChemApp.a(dt.o): In function `tqhdt_':
dt.f:(.text+0x173): undefined reference to `e_wsfi'
../libLChemApp.a(dt.o): In function `tqhdat_':
dt.f:(.text+0x1f4): undefined reference to `G77_date_and_time_0'
../libLChemApp.a(dt.o): In function `tqhgmy_':
dt.f:(.text+0x22d): undefined reference to `G77_date_and_time_0'
../libLChemApp.a(progcali.o): In function `tqhpnid_':
progcali.f:(.text+0x17): undefined reference to `s_copy'
progcali.f:(.text+0x2c): undefined reference to `s_copy'
progcali.f:(.text+0x44): undefined reference to `s_copy'
progcali.f:(.text+0x5c): undefined reference to `s_copy'
progcali.f:(.text+0x74): undefined reference to `s_copy'
../libLChemApp.a(progcali.o):progcali.f:(.text+0xf7): more undefined references to `s_copy' follow
collect2: error: ld returned 1 exit status

Could anyone tell me how can I compile a program by gcc which can be properly compiled by cc and g77?

Is there any compiler args which can be added to gcc to functions the same as g77?

Answer 1

As Etan mentions, g77 is a FORTRAN compiler. You are using it as a linker here (linking objects and libraries together into a program). This, plus your error messages, make pretty clear that at least one of those libraries you're linking are written in FORTRAN.

The easiest solution is to continue to use g77 to link. The linker will add special compiler-specific libraries to the program for you; for example if you link with g++ (the C++ compiler/linker) then it will add in the standard STL library, etc.

You don't say why using g77 is not acceptable, but if it's not you'll have to figure out what extra libraries g77 is linking and add them to your gcc link line by hand.

I don't have it installed so I can't tell you what they are, but you can run g77 -v ... and it should show you the command the g77 front-end uses to invoke the linker: the extra libraries you need should show up there.