DOCERR: Using the /4ccstring Switch for Conditional Compilation

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 query words: 4.00 4.01 4.10 5.00 5.10

Keywords :
Version : :4.0,4.01,4.1,5.0,5.1
Platform :
Issue type :