MSP430 IAR C/C++ Compiler reference guide - Rice University

Descriptions of optionsTo set related options, choose:Project>Options>General Options>Library Configuration--doubleSyntaxParametersDescription--double={32|64}32 (default) 32-bit doubles are used64 64-bit doubles are usedUse this option to select the precision used by the compiler for representing thefloating-point types double and long double. The compiler can use either 32-bit or64-bit precision. By default, the compiler uses 32-bit precision.See also Floating-point types, page 172.Project>Options>General Options>Target>Size of type 'double'-eSyntax -eDescriptionSee alsoIn the command line version of the MSP430 IAR C/C++ Compiler, language extensionsare disabled by default. If you use language extensions such as extended keywords andanonymous structs and unions in your source code, you must enable them by using thisoption.Note: The -e option and the --strict_ansi option cannot be used at the same time.The chapter Compiler extensions.Project>Options>C/C++ Compiler>Language>Allow IAR extensionsNote: By default, this option is enabled in the IAR Embedded Workbench IDE.150MSP430 IAR C/C++ CompilerReference Guide