[Bug target/106773] libbpf: failed to find BTF info for global/extern symbol 'bpf_link_fops'
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Dec 14 18:25:52 GMT 2022
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106773
--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by David Faust <dfaust@gcc.gnu.org>:
https://gcc.gnu.org/g:2bce22e88e1c8486a0f2d42311506a8d3da20fb7
commit r13-4707-g2bce22e88e1c8486a0f2d42311506a8d3da20fb7
Author: David Faust <david.faust@oracle.com>
Date: Wed Dec 7 11:44:28 2022 -0800
btf: add 'extern' linkage for variables [PR106773]
Add support for the 'extern' linkage value for BTF_KIND_VAR records,
which is used for variables declared as extern in the source file.
This also fixes a bug with BTF generation for extern variables which
have both a non-defining declaration and a defining declaration in the
same CU.
PR target/106773
gcc/
* btfout.cc (btf_collect_datasec): Mark extern variables as such.
(btf_dvd_emit_preprocess_cb): Skip non-defining extern variable
decl
if there is a defining decl for the same variable.
(btf_asm_varent): Accomodate 'extern' linkage.
gcc/testsuite/
* gcc.dg/debug/btf/btf-variables-4.c: New test.
* gcc.dg/debug/btf/btf-variables-5.c: New test.
include/
* btf.h (enum btf_var_linkage): New.
(struct btf_var): Update comment to note 'extern' linkage.
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