https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99898
Bug ID: 99898
Summary: Possible LTO object incompatibility on gcc-10 branch
Product: gcc
Version: 10.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: ohaiziejohwahkeezuoz at xff dot cz
CC: marxin at gcc dot gnu.org
Target Milestone: ---
I'm trying gcc (releases/gcc-10 branch with the last commit Fri Oct 23
10:11:41 2020 +0200 - Fix up plugin header install)
And I'm seeing an ICE cross-compiling glib library when linking with
i686-linux-musl-gcc -o gio/gresource gio/gresource.p/gresource-tool.c.o
-L/workspace/megous.com/apps-c/static-deps/output/i686/sys/usr/lib
-Wl,--as-needed -Wl,--no-undefined -Wl,-O1 -static -Wl,--start-group
gio/libgio-2.0.a glib/libglib-2.0.a gobject/libgobject-2.0.a
gmodule/libgmodule-2.0.a
/workspace/megous.com/apps-c/static-deps/output/i686/sys/usr/lib/libz.a
/workspace/megous.com/apps-c/static-deps/output/i686/sys/usr/lib/libmount.a
/workspace/megous.com/apps-c/static-deps/output/i686/sys/usr/lib/libblkid.a
-pthread -liconv -lm
/workspace/megous.com/apps-c/static-deps/output/i686/sys/usr/lib/libffi.a
-Wl,--end-group
lto1: internal compiler error: in lto_read_decls, at lto/lto-common.c:1956
Please submit a full bug report,
with preprocessed source if appropriate.
I'm compiling with fat LTO objects, and this only happens when mixing LTO
object files compiled with previous version of gcc on the tip of gcc-10 branch.
(and only with i686 target so far) Sorry I don't have precise version of the
previous compiler, but it was probably something close to 10.2 judging by the
dates on the object files.
Recompiling all dependencies with the same version of the compiler doesn't lead
to this ICE.
Maybe LTO version needs a bump prior to 10.3 release?
