MIPS cross-compilers on Solaris and Linux hosts generate slightly different code
Fri Jan 13 01:09:00 GMT 2006
We're using GCC 4.0.0, with binutils 2.15, both configured and built for
a mips-elf target, and hosted on both Solaris and Linux host machines.
All tools are configured and built identically on both hosts. I then
use the tools to build and install newlib-1.13.0, also configured an
built identically on both hosts. And yet the generated (MIPS) libraries
have subtle differences. For example, I notice different register usage
and instruction sequencing in the code generated for the _calloc_r
newlib function. I suspect that both generated sequences are correct,
but I have this intuitive expectation that they should be identical (for
some reason). Am I wrong?
I noticed just now that the native gcc's, used to build the
cross-toolchains, are version 3.2.2 on the Solaris machine and version
3.2 on the Linux machine. Does this make a difference?
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