Oracle Linux packages GNU COBOL in their EPEL distribution. The package is mature.

https://www.gnu.org/software/gnucobol/

  $ rpm -q gnucobol
  gnucobol-3.2-1.el9.x86_64

  $ rpm -qi gnucobol | tail -2
  COBOL compiler, which translates COBOL
  programs to C code and compiles them using GCC.

It will output intermediate C; one interesting thing is that the MOVE directive is mostly turned into memcpy().

I have been able to get the Oracle Pro*COBOL preprocessor to fully compile and run a demo database connection that connects to the "scott/tiger" schema and runs simple queries. Oracle packages both Pro*C and Pro*COBOL here (look for " Additional files for Pro*C and Pro*COBOL"):

https://www.oracle.com/database/technologies/instant-client....

It built with the two commands:

  procob MODE=ANSI INAME=procobdemo.pco ONAME=procobdemo.cob
  cobc -x -fixed procobdemo.cob /instantclient_21_12/cobsqlintf.o /instantclient_21_12/libclntsh.so

There is a similar "embedded SQL" implementation for PostgreSQL.

https://github.com/opensourcecobol/Open-COBOL-ESQL

There are a few other free COBOL compilers.

http://mainframeking.blogspot.com/2012/01/free-cobol-compile...