DOCERR: Using the /4ccstring Switch for Conditional Compilation

 Last reviewed: July 18, 1995
Article ID: Q49451
The information in this article applies to:
  • Microsoft FORTRAN for MS-DOS, versions 4.0, 4.01, 4.1, 5.0, 5.1
  • Microsoft FORTRAN for OS/2, versions 4.1, 5.0, 5.1

SUMMARY

The /4ccstring compiler option switch permits conditional compilation in a source file. According to page 355 of the Microsoft FORTRAN "Reference" manual for versions 5.0 and 5.1, 

   The /4cc option permits conditional compilation of a source file.
   The string is a set of alphabetic characters controlling which
   lines in the source file are to be compiled.
A similar statement appears on page 93 of the Microsoft FORTRAN "User's Guide" for versions 4.0 and 4.1.

MORE INFORMATION

The following code example demonstrates conditional compilation.

Sample Code

C Compile options needed: See below 

      PROGRAM TEST
L INTEGER*4 NUM S INTEGER*2 NUM R REAL*4 NUMBER 
      END
If you compile this code with the /4ccL option switch, the compiler reserves 4 bytes for NUM. If you specify the /4ccS option switch, the compiler reserves 2 bytes for NUM. If you omit the /4cc option switch, the L, S, and R lines are considered comment lines. If you specify the /4ccLS option switch, a multiply-defined symbol error occurs because NUM is defined twice. Compiling with the /4ccLR or /4ccSR option switch defines NUM with the desired size and defines NUMBER as a REAL*4.

Additional reference words: 4.00 4.01 4.10 5.00 5.10
KBCategory: kbother kbdocerr
KBSubcategory: FLIss

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Last reviewed: July 18, 1995
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