See -fprofile-arcs for details. For example, the following code would cause such a warning, because "x. All must be specifically enabled. If n is zero, then no line-wrapping will be done; each error message will appear on a single line. The default if neither flag is given to follow the standard, but to allow and give a warning for old- style code that would otherwise be invalid, or have different behavior. 
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As compared to -Othis option increases both compilation time and the performance of the generated code.
- arm-linux-gnueabi-gcc(1) - GNU project C and C++ compiler
This option disables constant folding of floating point expressions at compile-time which may be affected by rounding mode and arithmetic transformations that are unsafe in the presence of sign-dependent rounding modes. A char will be 1 gcc-4.6-arm-linux-tnueabi, an int will be 1 byte, a long will be 2 bytes and long long will be 4 bytes.
These warnings will help you find at compile time code that can try to write into a string constant, but only if you have been very careful about using "const" in gcc-4.6-afm-linux-gnueabi and prototypes. On some machines, such as the VAX, this flag has no effect, because the standard calling sequence automatically handles the frame pointer and nothing is saved by pretending it doesn't exist.
These can be used to improve optimization. These are normally unhelpful in finding bugs in your own code, therefore suppressed. If the optional argument is omitted or if file is gcc-4.6-arm-linux-gnuebi.
GNU C compiler
The limit applies after string constant concatenation, and does not count the trailing NUL. The default is -fno-rounding-math. A limit on the template instantiation depth is needed to detect endless recursions during template class instantiation. It also turns on the following optimization flags: Also print the version number of the compiler driver program and of the preprocessor and the compiler proper.
Certain other options, such as -mid-shared-library and -mfdpicimply -msim. It makes a difference where gcc-4.6-arm-linuc-gnueabi the command you write this option; the linker searches and processes libraries and object files in the order they are specified.
However for n greater than nine, the output is always printed to standard error. Also warn when making a cast which introduces a type qualifier in an unsafe way.
However it is expected, in the near future, that the remaining front ends would be able to digest them correctly. If possible, eliminate the explicit comparison operation. vcc-4.6-arm-linux-gnueabi
This option implies -fPIC. This option significantly reduces the size of debugging information, with some potential loss in type information to the debugger. With this flag, the program debug info reflects a new structure layout.
gccarm-linux-gnueabi : Precise () : Ubuntu
Slightly slower than levels 1 or 2 when optimization is enabled. When -fopenmp is specified, the compiler generates parallel code according to the OpenMP Application Program Interface v3. This option is required to use the Objective-C keywords try, throw, catch, finally and synchronized. During execution the program records how many times each branch and call is executed and how many times it is taken or returns.
gcc-4.6-arm-linux-gnueabi binary package in Ubuntu Precise amd64
This enables simple constant folding optimizations at all optimization levels. It can, however, make debugging gcc.6-arm-linux-gnueabi, since variables will no longer stay in a "home register". This switch is needed gcc-4.6-arm-linhx-gnueabi the target function will lie outside of the 64 megabyte addressing range of the offset based version of subroutine call instruction.
If loop unrolling is active, two passes are performed and the second is scheduled after loop unrolling. This option also allows the compiler to assume strict pointer semantics: They are meaningless if the compiler is not doing a link step.
These traps include division by zero, overflow, underflow, inexact result and invalid operation. This option used to be called -W. This allows these functions to be called from non-interworking code.
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