Data Options

This section contains descriptions for compiler options that pertain to the treatment of data. They are listed in alphabetical order.

• align
  Determines whether variables and arrays are naturally aligned. This content is specific to C++; it does not apply to DPC++.
• fcommon
  Determines whether the compiler treats common symbols as global definitions.
• fkeep-static-consts, Qkeep-static-consts
  Tells the compiler to preserve allocation of variables that are not referenced in the source.
• fmath-errno
  Tells the compiler that errno can be reliably tested after calls to standard math library functions.
• fpack-struct
  Specifies that structure members should be packed together.
• fpascal-strings
  Tells the compiler to allow for Pascal-style string literals. This content is specific to C++; it does not apply to DPC++.
• fpic
  Determines whether the compiler generates position-independent code.
• fpie
  Tells the compiler to generate position-independent code. The generated code can only be linked into executables.
• freg-struct-return
  Tells the compiler to return struct and union values in registers when possible. This content is specific to C++; it does not apply to DPC++.
• fstack-protector
  Enables or disables stack overflow security checks for certain (or all) routines.
• fstack-security-check
  Determines whether the compiler generates code that detects some buffer overruns. This content is specific to C++; it does not apply to DPC++.
• fvisibility
  Specifies the default visibility for global symbols or the visibility for symbols in declarations, functions, or variables. This content is specific to C++; it does not apply to DPC++.
• fzero-initialized-in-bss, Qzero-initialized-in-bss
  Determines whether the compiler places in the DATA section any variables explicitly initialized with zeros.
• GA
  Enables faster access to certain thread-local storage (TLS) variables.
• Gs
  Lets you control the threshold at which the stack checking routine is called or not called.
• GS
  Determines whether the compiler generates code that detects some buffer overruns.
• malign-double
  Determines whether double, long double, and long long types are naturally aligned. This option is equivalent to specifying option align. This content is specific to C++; it does not apply to DPC++.
• mcmodel
  Tells the compiler to use a specific memory model to generate code and store data.
• Qlong-double
  Changes the default size of the long double data type.