Mleaf-id-shared-library Generate code that supports shared libraries via the library ID method, but assumes that this library or executable won't link against any other ID shared libraries. Fno-implicit-templates Never emit code for non-inline templates that are instantiated implicitly (i. by use); only emit code for explicit instantiations. Transfer of control bypasses initialization of the code. Divide-by-zero checks can be completely disabled using -mno-check-zero-division. This allows for more efficient entry points in the runtime to be used.
In that case, Version 0 is the traditional (32-bit) ABI without support for properties and other Objective-C 2. Foptimize-strlen Optimize various standard C string functions (e. "strlen", "strchr" or "strcpy") and their "_FORTIFY_SOURCE" counterparts into faster alternatives. Compiling with -fno-common is useful on targets for which it provides better performance, or if you wish to verify that the program will work on other systems that always treat uninitialized variable definitions this way. It normally makes code faster, but at the expense of making it bigger. In C++ code, this allows member names in structures to be similar to previous types declarations. For example, in: float area(float radius) { return 3. This allows the compiler to emit diagnostic about the current macro expansion stack when a compilation error occurs in a macro expansion. Also turns on -dp annotation. Mips1 Equivalent to -march=mips1. With the unlimited model the vectorized code-path is assumed to be profitable while with the dynamic model a runtime check guards the vectorized code-path to enable it only for iteration counts that will likely execute faster than when executing the original scalar loop. Mv850e2v3 Specify that the target processor is the V850E2V3. Transfer of control bypasses initialization of the process. It is equivalent to -Wstrict-aliasing=3 -Wstrict-aliasing=n This option is only active when -fstrict-aliasing is active. This option has effect only for bfin-elf toolchain.
When enabled, this optimization will suppress the allocation of the frame header if it can be determined that it is unused. Three arbitration PALs 610, 612 and 614 are used to arbitrate requests for access to the data, address and control buses such that the DRAM 478 may be shared between the DMA controller 480 and the CPU 460. Fno-jump-tables Do not use jump tables for switch statements even where it would be more efficient than other code generation strategies. Mstack-guard= stack-guard -mstack-size= stack-size If these options are provided the S/390 back end emits additional instructions in the function prologue that trigger a trap if the stack size is stack-guard bytes above the stack-size (remember that the stack on S/390 grows downward). Wall This enables all the warnings about constructions that some users consider questionable, and that are easy to avoid (or modify to prevent the warning), even in conjunction with macros. Transfer of control bypasses initialization of the eye. Eden-x4 VIA Eden X4 CPU with x86-64, MMX, SSE, SSE2, SSE3, SSSE3, SSE4. The symbol name or section name specified in option cannot be found.
10A represents the award of a 100 millisecond timeslot to the Packet Switching Task by the main processor in the preferred embodiment. Fpus_all Enables support for all single-precision floating-point hardware extensions. 5A and 5B below are the processing of an interrupt service routine which services the LAN controller interrupts in some embodiments. Flto-compression-level= n This option specifies the level of compression used for intermediate language written to LTO object files, and is only meaningful in conjunction with LTO mode (-flto). Mcu@tie{}= "atxmega64a1", "atxmega64a1u". Symbol "symbol" redefined in option "option". Mshared-library-id=n Specifies the identification number of the ID-based shared library being compiled. MG In conjunction with an option such as -M requesting dependency generation, -MG assumes missing header files are generated files and adds them to the dependency list without raising an error. 1 Short instructions are used opportunistically. Large and/or growing networks generally use data link-state protocol exemplified by the IS--IS routing protocol of the OSI model. Wno-discarded-array-qualifiers (C and Objective-C only) Do not warn if type qualifiers on arrays which are pointer targets are being discarded. Enabling this reduces precision of reciprocal square root results to about 16 bits for single precision and to 32 bits for double precision.
If all input files are assembler output files, the stack option is ignored. The microprocessor 126 processes received data to be input to the bridging process by accessing memory 170 using a pointer to the received packet sent with the interrupt from the LAN controller. When generating code for shared libraries, -fpic implies -msmall-data and -fPIC implies -mlarge-data. For example -std=gnu90 -Wpedantic warns about C++ style // comments, while -std=gnu99 -Wpedantic does not. Fconcepts Enable support for the C++ Extensions for Concepts Technical Specification, ISO 19217 (2015), which allows code like template
Fixed limit on the size of the static frame of functions: when it is topped by a particular function, stack checking is not reliable and a warning is issued by the compiler. Wno-unused-result Do not warn if a caller of a function marked with attribute "warn_unused_result" does not use its return value. Options Controlling Objective-C and Objective-C++ Dialects (NOTE: This manual does not describe the Objective-C and Objective-C++ languages themselves. For further language-specific options also refer to C++ Dialect Options and Objective-C and Objective-C++ Dialect Options. Fsanitize=bool This option enables instrumentation of loads from bool. Unrecognized preprocessing directive.
M5200 Generate output for a 520X ColdFire CPU. Wno-format-contains-nul If -Wformat is specified, do not warn about format strings that contain NUL bytes. The first collection occurs after the heap expands by ggc-min-expand% beyond ggc-min-heapsize. Msmall-data -mlarge-data When -mexplicit-relocs is in effect, static data is accessed via gp-relative relocations. The free queue is used to store pointers to packets that have been scheduled for transmission by the main microprocessor. Specifying none as an algorithm disables partitioning and streaming completely.
Fno-ira-share-save-slots Disable sharing of stack slots used for saving call-used hard registers living through a call. Fshort-enums Allocate to an "enum" type only as many bytes as it needs for the declared range of possible values. This allows the network manager to manage components across the whole network while being connected to only one component thereof. These instructions are not generated unless you also use the -funsafe-math-optimizations switch. Maix-struct-return Return all structures in memory (as specified by the AIX ABI). Valid numbers are between 0 and 15 inclusive.
This is inefficient and a warning is generated to indicate that you should rewrite the code to avoid byte operations, or to target an AE type that has the necessary hardware support. The default is -mfsmuld when targeting a CPU supporting the architecture versions V8 or V9 with FPU except -mcpu=leon. See also the -fwrapv option. Option and the option to divide the output file cannot be specified simultaneously. The default is -mimadd on architectures that support "madd" and "msub" except for the 74k architecture where it was found to generate slower code. This option does not work in the presence of shared libraries or nested functions. Mcu@tie{}= "attiny10", "attiny20", "attiny4", "attiny40", "attiny5", "attiny9".
M32 Generate code for a 32-bit environment, which sets int, long, and pointer to 32 bits. There are three possible settings: -mcode-readable=yes Instructions may freely access executable sections. For the x86, GCC supports PIC for System V but not for the Sun 386i. Wno-pointer-to-int-cast (C and Objective-C only) Suppress warnings from casts from a pointer to an integer type of a different size. N can be a value from 0 to 10. If you know the CPU on which your code will run, then you should use the corresponding -mtune or -march option instead of -mtune=generic. This could result in slower and/or larger code if variables are pushed onto the stack instead of being held in this register.
Specifying -mno-long-calls restores the default behavior, as does placing the function calls within the scope of a "#pragma long_calls_off" directive. Matomic-updates -mno-atomic-updates This option controls the version of libgcc that the compiler links to an executable and selects whether atomic updates to the software-managed cache of PPU-side variables are used. Fno-branch-count-reg Avoid running a pass scanning for opportunities to use "decrement and branch" instructions on a count register instead of generating sequences of instructions that decrement a register, compare it against zero, and then branch based upon the result. Minline-float-divide-min-latency Generate code for inline divides of floating-point values using the minimum latency algorithm. Because the behavior of these functions when called with a zero size differs among implementations (and in the case of "realloc" has been deprecated) relying on it may result in subtle portability bugs and should be avoided. When the use and definition of the variable are in the same translation unit, this overhead can be optimized away, but when the use is in a different translation unit there is significant overhead even if the variable doesn't actually need dynamic initialization. When this option is used with the Objective-C or Objective-C++ compiler, any Objective-C syntax that is not recognized by GCC 4. Gsplit-dwarf Separate as much DWARF debugging information as possible into a separate output file with the extension This option allows the build system to avoid linking files with debug information. "> *<-Wimplicit-fallthrough=4 case sensitively matches one of the> following regular expressions: *<"-fallthrough"> *<"@fallthrough@"> *<"lint -fallthrough[ \t]*"> *<"[ \t]*FALLTHR(OUGH|U)[ \t]*"> *<-Wimplicit-fallthrough=5 doesn't recognize any comments as> fallthrough comments, only attributes disable the warning. The CPU controls these LED's by writing data into registers in the circuit 582. When this bit is found in the "processed" state, the Ethernet processor 804 would know that that table location is available for use in storing a pointer to a new packet awaiting processing.
Note, although the RL78/G14 core is the default target, specifying -mcpu=g14 or -mcpu=rl78 on the command line does change the behavior of the toolchain since it also enables G14 hardware multiply support.