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Gcc Error Attributes Are Not Allowed On A Function-definition

Note that the warnings only occurs for uses: int old_fn () __attribute__ ((deprecated)); int old_fn (); int (*fn_ptr)() = old_fn; results in a warning on line 3 but not line If the format_arg attribute had not been specified, all the compiler could tell in such calls to format functions would be that the format string argument is not constant; this would The compiler generates function entry and exit sequences suitable for use in an NMI handler when this attribute is present. The format attribute allows you to identify your own functions which take format strings as arguments, so that GCC can check the calls to these functions for errors. this contact form

For strftime formats, the third parameter is required to be zero. The board-specific routine simulates a call. Saving to the bank is performed automatically after the CPU accepts an interrupt that uses a register bank. When profile feedback is available, via -fprofile-use , hot functions are automatically detected and this attribute is ignored. other

For Objective-C dialects, NSString (or __NSString__ ) is recognized in the same context. wakeup This attribute only applies to interrupt functions. The no_address_safety_analysis is a deprecated alias of the no_sanitize_address attribute, new code should use no_sanitize_address .

Implementation of a generic List Why microcontroller takes many clock cycles to start up with PLL clock source? Format For Printing -XML -Clone This Bug -Top of page First Last Prev Next This bug is not in your last search results. In C99 mode, the functions snprintf , vsnprintf , vscanf , vfscanf and vsscanf are also checked. interruptUse this attribute on the ARM, AVR, C4x, M32R/D and Xstormy16 ports to indicate that the specified function is an interrupt handler.

Note, for the ARM, you can specify the kind of interrupt to be handled by adding an optional parameter to the interrupt attribute like this: void f () __attribute__ ((interrupt ("IRQ"))); See Format Checks Specific to Particular Target Machines . cdeclOn the Intel 386, the cdecl attribute causes the compiler to assume that the calling function will pop off the stack space used to pass arguments. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12246 When to use "bon appetit"?

Sign up for the SourceForge newsletter: I agree to receive quotes, newsletters and other information from sourceforge.net and its partners regarding IT services and products. If the compiler determines that a null pointer is passed in an argument slot marked as non-null, and the -Wnonnull option is enabled, a warning is issued. the attribute marks defined non-inlined member functions and static data members as exports. It directs GCC to treat the function as if it were defined in gnu90 mode even when compiling in C99 or gnu99 mode.

exit (1); } The noreturn keyword tells the compiler to assume that fatal cannot return. https://sourceforge.net/p/libjson/bugs/28/ The deprecated attribute can also be used for variables and types (see Variable Attributes , see Type Attributes .) disinterrupt On Epiphany and MeP targets, this attribute causes the compiler to For instance, the declaration: extern void * my_memcpy (void *dest, const void *src, size_t len) __attribute__((nonnull (1, 2))); causes the compiler to check that, in calls to my_memcpy, arguments dest and The compiler will generate more efficient code for loads and stores on data in the tiny data section.

These two reasons applied to almost any application that might have been proposed for #pragma. It does not make sense for a const function to return void. Weak symbols are supported for ELF targets, and also for a.out targets when using the GNU assembler and linker. If no argument index list is given to the nonnull attribute, all pointer arguments are marked as non-null.

hotpatch ( halfwords-before-function-label , halfwords-after-function-label ) On S/390 System z targets, you can use this function attribute to make GCC generate a “hot-patching” function prologue. far On MeP targets this causes the compiler to use a calling convention that assumes the called function is too far away for the built-in addressing modes. The priorities for constructor and destructor functions are the same as those specified for namespace-scope C++ objects (see C++ Attributes ). no_icf This function attribute prevents a functions from being merged with another semantically equivalent function.

For ARC, a function marked with the long_call attribute is always called using register-indirect jump-and-link instructions, thereby enabling the called function to be placed anywhere within the 32-bit address space. signal Use this attribute on the AVR to indicate that the specified function is an interrupt handler. This is to allow easy merging of multiple compilation units into one, for example, by using the link-time optimization.

See section `Miscellaneous Preprocessing Directives' in The C Preprocessor. [ < ] [ > ] [ << ] [ Up ] [ >> ] [Top] [Contents]

Functions with these attributes are useful for initializing data that will be used implicitly during the execution of the program. The function is put into a specific section named .l1.text . If you need to map the entire contents of a module to a particular section, consider using the facilities of the linker instead. When applied to C++ classes, the attribute marks defined non-inlined member functions and static data members as exports.

This is just like the interrupt attribute, except that freit is used to return instead of reit . Functions with this attribute are not so instrumented. On 68HC11 the compiler will generate a sequence of instructions to invoke a board-specific routine to switch the memory bank and call the real function. Present mainline tells us more, at least for the non-member case: mp/g> c++ -c x.cc x.cc:2: error: expected function-definition x.cc:5: error: attributes are not allowed on a function-definition So the point

Since non-static C++ methods have an implicit this argument, the arguments of such methods should be counted from two. What is the first movie to show this hard work message at the very end? The parameter string-index specifies which argument is the format string argument (starting from 1), while first-to-check is the number of the first argument to check against the format string. These functions should be declared with the attribute pure .

The OS_main attribute can be used when there is guarantee that interrupts are disabled at the time when the function is entered. void foo (void) __attribute__((function_vector(0x18))); void foo (void) { } void bar (void) { foo(); } If functions are defined in one file and are called in another file, then be sure If the argument is a number it indicates the slot in the interrupt vector table (0 - 31) to which this handler should be assigned. W.

For example, the sin function is a leaf function, but qsort is not. always_inlineGenerally, functions are not inlined unless optimization is specified. For strftime formats, the third parameter is required to be zero. weakThe weak attribute causes the declaration to be emitted as a weak symbol rather than a global.

Since this can cause object file-size bloat, you can use -fno-keep-inline-dllexport , which tells GCC to ignore the attribute for inlined functions unless the -fkeep-inline-functions flag is used instead. Note, the ms_abi attribute for Microsoft Windows 64-bit targets currently requires the -maccumulate-outgoing-args option. Meaning of "oh freak" Flow Chart with tikzpicture: particular tipes of arrows How to use the binomial theorem to calculate binomials with a negative exponent Is it illegal for regular US