Bug 787537

Description of problem:
Installing both versions of the above packages (srtp-devel.x86_64 and srtp-devel.i686) for the purpose of
cross-compiling is not possible as the config.h file is overwritten with
the version of that file from the last arch installed. 

Cross-compilation is therefore going to FAIL as this file contains arch-specific settings, like "HAVE_X86" and SIZEOF_UNSIGNED_LONG.

This is a *very* bad practice and should be avoided (see for a possible solution at the end).


Version-Release number of selected component (if applicable):
1.4.4-1

How reproducible:
Always

Steps to Reproduce:
1. install both packages for the to 2 arches in question (x86_64 & i686)
2.
3.
  
Actual results:
in srtp/config.h there are two arch-specific settings:

#define HAVE_X86 1 (for i686 arch)
/* #undef HAVE_X86 */ (for x86_64 arch)

and 

#define SIZEOF_UNSIGNED_LONG 4 (for i686 arch)
#define SIZEOF_UNSIGNED_LONG 8 (for x86_64 arch)

This is a recipe for disaster! Any cross-compilation will fail - miserably so - because of the above value being hardcoded.

Expected results:
Co-existence of both -devel packages to be made possible, allowing cross-compilation to succeed without any undesired side effects.

Additional info:
One possible solution I deploy in such circumstances is to rename the existing config.h to config-[arch-bits].h (i.e. config-32.h for 32-bit system and config-64.h for 64-bit system) and then use this as config.h:

===config.h====
/* This file is here to prevent a file conflict on multiarch systems.  A
 * conflict will frequently occur because arch-specific build-time
 * configuration options are stored (and used, so they can't just be stripped
 * out) in config.h.  The original config.h has been renamed.
 * DO NOT INCLUDE THE NEW FILE DIRECTLY -- ALWAYS INCLUDE THIS ONE INSTEAD. */

#ifdef srtp_multilib_redirection_h
#error "Do not define srtp_multilib_redirection_h!"
#endif
#define srtp_multilib_redirection_h

#if defined(__x86_64__)
#include "srtp/config-64.h"
#else
#include "srtp/config-32.h"
#endif

#undef srtp_multilib_redirection_h
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