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'''Command-line changes'''
 
'''Command-line changes'''
  
* Starting with GCC 4.3.1, the <code>-mcld</code> option has been added to automatically generate a cld instruction in the prologue of functions that use string instructions. This option is used for backward compatibility on some operating systems and can be enabled by default for 32-bit x86 targets by configuring GCC with the <code>--enable-cld</code> configure option.
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* Starting with GCC 4.3.1, the <code>-mcld</code> option has been added to automatically generate a <code>cld</code> instruction in the prologue of functions that use string instructions. This option is used for backward compatibility on some operating systems and can be enabled by default for 32-bit x86 targets by configuring GCC with the <code>--enable-cld</code> configure option.

Revision as of 08:08, 11 October 2008

GCC Compiler Collection

This release of Fedora has been built with GCC 4.3.2, which is included with the distribution.

For more information on GCC 4.3, refer to:

http://gcc.gnu.org/gcc-4.3/

Target-Specific Improvements
IA-32/x86-64

ABI changes

  • Starting with GCC 4.3.1, decimal floating point variables are aligned to their natural boundaries when they are passed on the stack for i386.

Command-line changes

  • Starting with GCC 4.3.1, the -mcld option has been added to automatically generate a cld instruction in the prologue of functions that use string instructions. This option is used for backward compatibility on some operating systems and can be enabled by default for 32-bit x86 targets by configuring GCC with the --enable-cld configure option.