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Use -O2 -fno-strict-aliasing optimization for FreeBSD

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- Switching from -O to -O2 after the dthelp problem
  has been resolved
- Introducing -fno-strict-aliasing (currently FreeBSD's
  default) to avoid silent change of behaviour of legacy code.

  http://thiemonagel.de/2010/01/no-strict-aliasing/

  http://jeffreystedfast.blogspot.de/2010/01/weird-bugs-due-to-gcc-44-and-strict.html

Analysis of C99 aliasing (we are not C99 yet):

  http://davmac.wordpress.com/2010/02/26/c99-revisited/
This commit is contained in:
Marcin Cieslak 2012-10-02 02:10:35 +02:00 committed by Jon Trulson
parent 775fb0f0f1
commit de61ffa637
1 changed files with 2 additions and 2 deletions
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4
cde/config/cf/FreeBSD.cf
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@ -138,14 +138,14 @@ XCOMM operating system: OSName (OSMajorVersion./**/OSMinorVersion./**/OSTeenyVe
/* The GCC strength-reduce bug is fixed for FreeBSD 2.1.5 and later */
#ifndef DefaultGcc2i386Opt
#if OSMajorVersion > 2 || (OSMajorVersion == 2 && OSMinorVersion > 1) || (OSMajorVersion == 2 && OSMinorVersion == 1 && OSTeenyVersion >= 5)
#define DefaultGcc2i386Opt -O
#define DefaultGcc2i386Opt -O2 -fno-strict-aliasing
#endif
#endif
#ifdef i386Architecture
# define OptimizedCDebugFlags DefaultGcc2i386Opt
#else
# define OptimizedCDebugFlags -O
# define OptimizedCDebugFlags -O2 -fno-strict-aliasing
#endif
#define ServerExtraDefines GccGasOption XFree86ServerDefines