| OPENMP API Specification: Version 5.0 November 2018

2.1.1  Fixed Source Form Directives

The following sentinels are recognized in fixed form source files:  

!$omp | c$omp | *$omp  

Sentinels must start in column 1 and appear as a single word with no intervening characters. Fortran fixed form line length, white space, continuation, and column rules apply to the directive line. Initial directive lines must have a space or a zero in column 6, and continuation directive lines must have a character other than a space or a zero in column 6.

Comments may appear on the same line as a directive. The exclamation point initiates a comment when it appears after column 6. The comment extends to the end of the source line and is ignored. If the first non-blank character after the directive sentinel of an initial or continuation directive line is an exclamation point, the line is ignored.

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Note – In the following example, the three formats for specifying the directive are equivalent (the first line represents the position of the first 9 columns):  

!$omp parallel do shared(a,b,c) 
c$omp parallel do 
c$omp paralleldoshared(a,b,c)  

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