With release of Xcode 3.2.6/4.0 this week, an unfortunate change was made to
the darwin assembler which effectively breaks LTO support for darwin. The design
of LTO on darwin was based on the fact that mach-o object files tolerated
additional
sections as long as they didin't contain symbols. With Xcode 3.2.6/4.0, the
assembler
appears to be strictly counting sections and objecting when these exceed 255.
This
breaks huge sections of the lto testsuite and prevents larger projects like
xplor-nih
to compile if Xcode 3.2.6/4.0 is installed. I am afraid that unless Apple
reverts this
change, our only recourse would be to resort to an elf object container for the
lto
sections within the mach-o files (introducing an undesired dependency on libelf
for
FSF gcc on darwin). My understanding was that the lto design did not allow the
number
of sections required in the lto files to be reduced.
Jack
