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Use of IBM COBOL was so widespread that Capex Corporation, an independent software vendor, made a post-code generation phase object code optimizer for it. [3] The Capex Optimizer became a quite successful product. [4] Although the IBM COBOL Compiler Family web site [5] only mentions AIX, Linux, and z/OS, IBM still offers COBOL on z/VM and z/VSE.
GnuCOBOL translates a COBOL program (source code) into a C program. The C program can then be compiled into the actual code used by the computer (object code) or into a library where other programs can call (link to) it. On UNIX and similar operating systems (such as Linux), the GNU C compiler is used for this process.
COBOL is a difficult language to write a compiler for, due to the large syntax and many optional elements within syntactic constructs, as well as the need to generate efficient code for a language with many possible data representations, implicit type conversions, and necessary set-ups for I/O operations. [75]
IBM provides ILE compilers for C, C++, RPG, COBOL and CL. [1] For RPG, COBOL and CL, there are both OPM compilers (still sometimes used for legacy applications) and the new ILE compilers. Likewise, as well as ILE C, there was an earlier EPM-based C/400, although that has been discontinued.
The LINC system created 3rd GL COBOL (application), DMSII (database definition), NDLII (network description), and WFL (job control) source code. The job control statements were themselves subsequently run to compile the other elements and create an integrated system of database, applications, and user terminal network.
ABAP, COBOL, PHP, PL/SQL, T-SQL, SQL, Visual Basic, Android: Software Analytics end-to-end platform for static code analysis and automated code review. It covers defect detection, application security & IT Risk Management, with enhanced life cycle and application governance features. Support for over 20 languages. Klocwork: 2023-04-04 (2023.1)
An even earlier FORTRAN compiler (FORTRAN V), while no longer supported, is still in use for an application developed in the 1960s in that language. Compilers previously existed for ALGOL , Simula , BASIC , Lisp , NELIAC , JOVIAL , and other programming languages that are no longer in use on the ClearPath OS 2200 systems.
This system, introduced in 1982, was a landmark development in compiler technique. It allowed a code generator to map local variables to processor registers with very high efficiency. On a machine that relied on register use for performance, which is one of the primary concepts of RISC processors, this technique can lead to huge improvements.