https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111635
Bug ID: 111635
Summary: Objects built with -flto cannot be linked with Xcode
Product: gcc
Version: 13.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: amy at amyspark dot me
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 56013
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56013&action=edit
Full build failure log
Hi,
This is to report that GCC is feeding broken assembly to AppleClang as part of
LTO linking.
The output looks as follows:
/var/folders/l1/b3htrbqd3w3f32x9lk1yll6h0000gn/T//ccPBRnCj.s:1628:18: error:
non-local symbol required in directive
.private_extern LPBX0.lto_priv.0
^
/var/folders/l1/b3htrbqd3w3f32x9lk1yll6h0000gn/T//ccPBRnCj.s:1629:9: error:
non-local symbol required in directive
.globl LPBX0.lto_priv.0
(snip)
followed by the corresponding:
make: ***
[/var/folders/l1/b3htrbqd3w3f32x9lk1yll6h0000gn/T//ccVBnAk5.ltrans1.ltrans.o]
Error 1
make: *** Waiting for unfinished jobs....
/var/folders/l1/b3htrbqd3w3f32x9lk1yll6h0000gn/T//ccpBZ3qu.s:360623:1: error:
assembler local symbol 'LPBX0.lto_priv.0' not defined
^
(snip)
I am not able to attach the resulting assembly as this happens during the
linking step and the files are lost upon failure. It is still easily
reproducible by building https://github.com/blackmagic-debug/bmpflash with
`meson setup build -Db_lto=true --buildtype=debug` followed by `meson compile
-C build`.
This was tested with GCC 13.2.0 as shipped by Homebrew, Xcode 13.2.1.
