bits/byteswap.h __bswap_32 does not cross compiling on ARM processors

[mike morrison]

Binary package hint: libc6-dev

When I try to cross compile programs for an ARM processor (omap3) that use bswap_32() directly or indirectly through functions like htons() the compiler complains:

error: invalid 'asm': invalid operand for code 'w'

This only happens when __builtin_constant_p returns 0.

---

$ lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10

$ apt-cache policy libc6-dev
libc6-dev:
  Installed: 2.8~20080505-0ubuntu7
  Candidate: 2.8~20080505-0ubuntu7
  Version table:
 *** 2.8~20080505-0ubuntu7 0
        500 http://archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status