https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81926
--- Comment #11 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
[...]
> Rainer, do you test Go in this configuration (system as + ld)?
Sorry for the long delay: I've been mostly away for 6 weeks, only now
catching up.
I do indeed, and I believe this is not related to Go at all.
I've been seeing similar bootstrap comparison failures on Solaris/SPARC,
but only when using /bin/as. I tend to forget about them since most of
my bootstraps are done with contrib/regression/btest-gcc.sh which mostly
hides them ;-(
I had analyzed this in the past already. Here's what I found, and just
reconfirmed for the smallest differing file in a sparc-sun-solaris2.11
bootstrap, gcc/ada/table.o in my case:
* with -gtoggle (stage2), there's no .text section in the assembler
output
* without -gtoggle (stage3), the assembler output gets
--- table.s.gtoggle 2017-08-28 14:07:23.811292680 +0000
+++ table.s.no-gtoggle 2017-08-28 14:08:00.674764535 +0000
@@ -1,4 +1,6 @@
.file "table.adb"
+ .section ".text"
+.LLtext0:
.global table_E
.section ".data"
.align 2
@@ -6,4 +8,43 @@
.size table_E, 2
table_E:
.skip 2
+ .section ".text"
+.LLetext0:
While gas always adds a .text section, even for an empty imput file,
/bin/as on sparc does not, thus the difference, although it causes no
functional change.
I'll be experimenting with a small patch to add a dummy .text section
from TARGET_ASM_FILE_START to work around this and see if it helps.
Rainer
