Library Functions and Header Files

This section describes the implementation of library functions in HP C/HP-UX. For complete information about library functions on HP C/HP-UX, see the HP-UX Reference manual and HP-UX Linker and Libraries Online User Guide.

The Math Library

When using any of the mathematical functions in the <math.h> header, you must include the -lm flag on the cc or ld command when linking. This will cause the linker to link in the appropriate math library.

Other Library Functions

longjmp: Because HP C/HP-UX can place automatic variables in registers, you cannot rely on their values if they are changed between the setjmp and longjmp functions.
setjmp: There are no restrictions on when calls to setjmp can be made.




	NOTE: `+Olibcalls` transforming `setjmp` to `_setjmp` and `longjmp` to `_longjmp` is not supported in 11.x of HP C compilers.

Library Functions and Header Files

Technical documentation

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The Math Library

Other Library Functions