The following options restrict or preclude the compiler's ability to optimize your program:
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-O0 |
Disables optimizations. Enables -fp option. |
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-mp |
Restricts optimizations that cause some minor loss or gain of precision in floating-point arithmetic to maintain a declared level of precision and to ensure that floating-point arithmetic more nearly conforms to the ANSI and IEEE* standards. See -mp option for more details. |
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-g |
Specifying the -g option turns off the default -O2 option and makes -O0 the default unless -O2 (or -O1 or -O3) is explicitly specified in the command line together with -g. See Optimizations and Debugging. |
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-nolib_inline |
Disables inline expansion of intrinsic functions. |
For more information on ways to restrict optimization, see Using -ip with -Qoption specifiers.