Looking for OSS program to convert Code into Flowchart
Is there an open source program which can convert code into a flowchart? I would prefer a program which can convert C or ASM but FORTRAN, python, etc, would be fine too. Programs were once written / designed using flowcharts many years ago (well before my time). I am trying to find a program which can show all logic - not just function calls. All I can find are Call-graph and function-trace programs however. Any suggestions?