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Status Submitted
Workspace AIX
Created by Guest
Created on Jun 28, 2024

RELATED IDEAS

redefining functions in header files - do it the right way

When functions in header files need to be redefined (e.g. to get new default behavior),
this should NOT be done by just renaming them with a simple '#define func_new func_old'.
Instead, macros should be used like it was done for older XL C/C++ compilers, for example:

   #pragma map(malloc,"vec_malloc")
   #pragma map(calloc,"vec_calloc")

or - as it was done for the newer compilers - with

   extern void *_NOTHROW(malloc, (size_t)) __asm__("vec_malloc");
   extern void *_NOTHROW(calloc, (size_t, size_t)) __asm__("vec_calloc");


But simply redefining (i.e. 'overwriting') a definition like it was done for the new default
for LARGE_FILE support (for example):

   #ifdef _LARGE_FILES
   #define stat    stat64
   #define fstat   fstat64

leads to all kind of trouble - and other plattforms also don't do it that way!

 

Regards,

Markus.

Idea priority Medium

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