/[pcre]/code/trunk/pcrecpp.cc
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revision 328 by ph10, Wed Mar 26 17:39:06 2008 UTC revision 329 by ph10, Fri Mar 28 12:06:36 2008 UTC
# Line 64  Arg RE::no_arg((void*)NULL); Line 64  Arg RE::no_arg((void*)NULL);
64  // only the __attribute__ syntax, but also __USER_LABEL_PREFIX__, are  // only the __attribute__ syntax, but also __USER_LABEL_PREFIX__, are
65  // gnu-specific.)  // gnu-specific.)
66  #if defined(__GNUC__) && __GNUC__ >= 3  #if defined(__GNUC__) && __GNUC__ >= 3
67  #if defined(__ELF__)  # define AS_STRING(x)   AS_STRING_INTERNAL(x)
68    # define AS_STRING_INTERNAL(x)   #x
69    # define USER_LABEL_PREFIX  AS_STRING(__USER_LABEL_PREFIX__)
70    # if defined(__ELF__)
71  extern Arg no_arg  extern Arg no_arg
72    __attribute__((alias(__USER_LABEL_PREFIX__ "_ZN7pcrecpp2RE6no_argE")));    __attribute__((alias(USER_LABEL_PREFIX "_ZN7pcrecpp2RE6no_argE")));
73  #else  # else
74  // While we know elf supports strong aliases, not all formats do (Mach  // While we know elf supports strong aliases, not all formats do (Mach
75  // doesn't, for instance).  So make aliases weak by default.  This is  // doesn't, for instance).  So make aliases weak by default.  This is
76  // a smidge less safe in theory (conceivably, someone could override  // a smidge less safe in theory (conceivably, someone could override
77  // this symbol in their own binary), but perfectly ok in practice.  // this symbol in their own binary), but perfectly ok in practice.
78  extern Arg no_arg  extern Arg no_arg
79    __attribute__((weak, alias(__USER_LABEL_PREFIX__ "_ZN7pcrecpp2RE6no_argE")));    __attribute__((weak, alias(USER_LABEL_PREFIX "_ZN7pcrecpp2RE6no_argE")));
80  #endif  # endif
81  #endif  #endif
82    
83  // If a regular expression has no error, its error_ field points here  // If a regular expression has no error, its error_ field points here
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