Partially disabling -fno-builtin

[Etienne LORRAIN]

Maarten de Jong wrote:
> I figured it could be caused by the fact that gcc uses its own
> code for common functions (in my case, sqrt() and fabs()). You
> can disable this 'inlining' by supplying gcc with the -fno-builtin
> option---but that also affects other functions which can be 
> replaced by built-in equivalents. Can I select which functions
> should be *not* be replaced by built-in code without invoking
> -fno-builtin?

  In C, I would do that by two "#define" in all the software,
 because builtin function are never really declared:
 Put in bltin.h:
#define sqrt my_sqrt
#define fabs my_fabs
 And compile with:
gcc --include bltin.h -02 ...

  Just my Euro 0.002,
  Etienne.
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