------- Comment #19 from davek at gcc dot gnu dot org 2010-01-17 15:08 -------
Created an attachment (id=19635)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19635&action=view)
lto for cygwin, and probably other coff targets
FTR. Well, that turned out to be quite easy. Needs some support in binutils
to allow us to override the default section alignment for object files, but
that's trivial, and I'll send it to the binutils list shortly.
Sigh, most of this is almost-safe-enough-for-stage-3. Oh well.
Should I reopen this bug, assign it to myself, retarget it to 4.6 and add the
words "or COFF" to the summary?
Results from this patch:
Running /gnu/gcc/gcc/gcc/testsuite/gcc.dg/lto/lto.exp ...
FAIL: gcc.dg/lto/20081222 c_lto_20081222_1.o assemble, -O0 -fwhopr
FAIL: gcc.dg/lto/20081222 c_lto_20081222_1.o assemble, -O2 -fwhopr
FAIL: gcc.dg/lto/20081222 c_lto_20081222_1.o assemble, -O0 -flto
FAIL: gcc.dg/lto/20081222 c_lto_20081222_1.o assemble, -O2 -flto
FAIL: gcc.dg/lto/20090914-2 c_lto_20090914-2_0.o assemble, -O0 -fwhopr
FAIL: gcc.dg/lto/20090914-2 c_lto_20090914-2_0.o assemble, -O2 -fwhopr
FAIL: gcc.dg/lto/20090914-2 c_lto_20090914-2_0.o assemble, -O0 -flto
FAIL: gcc.dg/lto/20090914-2 c_lto_20090914-2_0.o assemble, -O2 -flto
=== gcc Summary ===
# of expected passes 462
# of unexpected failures 8
# of unresolved testcases 16
# of unsupported tests 2
/gnu/gcc/obj-lto/gcc/xgcc version 4.5.0 20100116 (experimental) (GCC)
... i.e. the only tests that still fail are one that uses visibility and one
that has an ELF-specific .section directive in an asm, all the rest work and in
particular the "gcc.dg/lto/20081201-2 c_lto_20081201-2_0.o-c_lto_20081201-2_1.o
execute -O3 -fwhopr" test succeeds which indicates real LTO is taking place :-)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41529
