Hello, Bootstrap is currently broken with Ada on x86_64-windows using SEH exceptions, with several stage2/stage3 object comparison failures like
Bootstrap comparison failure!
gcc/ada/ali-util.o differs
gcc/ada/ali.o differs
...
(PR 81470)
The differences come from variations between -g and -g0 on the placement of
data attached to LDFCM labels, in particular those related to the emission of
.cfi_personality and .cfi_lsda by dwarf2out_do_cfi_startproc.
These aren't needed for SEH anyway, so the proposed patch just prevents the
generation of those .cfi notes if the target eh format isn't dwarf2.
We have used this for a couple of years on gcc-6, it cures the same
bootstrap failure on gcc-7, and bootstraps + regression-tests fine
with mainline on x86_64-linux.
OK to commit ?
2017-11-30 Tristan Gingold <ging...@adacore.com>
* dwarf2out.c (dwarf2out_do_cfi_startproc): Only emit
.cfi_personality or .cfi_lsda if the eh data format is dwarf2.
cfi_startproc-nondwarf2.diff
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