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Bug#57994: Compiler flag change build error : my_redel.c

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Use __builtin_stpcpy only if the system supports stpcpy.
This is necessary as in some cases a call to stpcpy will
be emitted if the built-in can not optimized.

include/m_string.h:
  The expansion of stpcpy (in glibc) causes warnings if the
  return value of strmov is not being used. Since stpcpy is
  a GNU extension and the expansion ends up using a built-in
  provided by GCC, use the compiler provided built-in directly
  when possible. Nonetheless, the C library must have stpcpy
  as a call be emitted if the built-in can not optimized.
This commit is contained in:
Davi Arnaut 2010-11-17 07:41:29 -02:00
parent cd1c6e220d
commit c324624291
1 changed files with 2 additions and 2 deletions
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4
include/m_string.h
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@ -73,8 +73,8 @@ extern "C" {
extern void *(*my_str_malloc)(size_t);
extern void (*my_str_free)(void *);
#if MY_GNUC_PREREQ(3, 4)
#define strmov(dest, src) __builtin_stpcpy(dest, src)
#if defined(HAVE_STPCPY) && MY_GNUC_PREREQ(3, 4)
#define strmov(A,B) __builtin_stpcpy((A),(B))
#elif defined(HAVE_STPCPY)
#define strmov(A,B) stpcpy((A),(B))
#ifndef stpcpy