Bug 865277 – app-crypt/tpm2-tools-5.2-r1 fails tests (lto): <artificial>:(.text.tpm2_handle_options.constprop.0+0x7e4): undefined reference to __wrap_tpm2_util_getenv

• Product: Gentoo Linux
• Status: RESOLVED DUPLICATE

[Description Agostino Sarubbo 2022-08-15 18:26:52 UTC]

https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/

Issue: app-crypt/tpm2-tools-5.2-r1 fails tests (lto).
Discovered on: amd64 (internal ref: lto_tinderbox)

NOTE:
This machine uses lto with CFLAGS=-flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing

Here is a bit of explanation:

-Werror=lto-type-mismatch:
User to find possible runtime issues in packages. It likely means the package is unsafe to build & use with LTO.
For projects using the same identifier but with different types across different files, they must be fixed to be consistent across the codebase.

-Werror=odr:
Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO. C++ code must comply with the One Definition Rule (ODR) - see https://en.cppreference.com/w/cpp/language/definition#One_Definition_Rule.

-Werror=strict-aliasing:
Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO.

Workarounds:
- If upstream is friendly and still active, file a bug upstream. For emulators, codecs, games, or multimedia packages, it may be worth just applying a workaround instead, as upstreams sometimes aren't receptive to these bugs (VALID FOR ALL).
- Use the new 'filter-lto' from flag-o-matic.eclass as it's likely to be unsafe with LTO (VALID FOR lto-type-mismatch - odr).
- Fix it yourself if interested, of course (VALID FOR ALL).
- Append-flags -fno-strict-aliasing (VALID FOR strict-aliasing).
- Use memcpy() but a union is sometimes suitable too (VALID FOR strict-aliasing).
- -fstrict-aliasing is implied by -O2, so this must be addressed in some form (VALID FOR strict-aliasing).

See also: https://marc.info/?l=gentoo-dev&m=165639574126280&w=2

[Comment 1 Agostino Sarubbo 2022-08-15 18:26:54 UTC]

Created attachment 799775 [details]
build.log

build log and emerge --info

[Comment 2 Agostino Sarubbo 2022-08-15 18:26:56 UTC]

Error(s) that match a know pattern in addition to what has been reported in the summary:


/usr/lib/gcc/x86_64-pc-linux-gnu/12.1.1/../../../../x86_64-pc-linux-gnu/bin/ld: <artificial>:(.text.tpm2_handle_options.constprop.0+0x80c): undefined reference to `__wrap_tpm2_util_getenv'
<artificial>:(.text.tpm2_handle_options.constprop.0+0x7e4): undefined reference to `__wrap_tpm2_util_getenv'
collect2: error: ld returned 1 exit status

[Comment 3 Larry the Git Cow 2022-09-27 21:44:43 UTC]

The bug has been closed via the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=cd1574236dd9457377d45d53470816828e364a8a

commit cd1574236dd9457377d45d53470816828e364a8a
Author:     Christopher Byrne <[e-mail]>
AuthorDate: 2022-09-26 21:22:13 +0000
Commit:     Sam James <[e-mail]>
CommitDate: 2022-09-27 21:42:35 +0000

    app-crypt/tpm2-tools: Filter out LTO flags due test failures
    
    Closes: https://bugs.gentoo.org/865277
    Signed-off-by: Christopher Byrne <[e-mail]>
    Signed-off-by: Sam James <[e-mail]>

 app-crypt/tpm2-tools/tpm2-tools-5.2-r1.ebuild | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

[Comment 4 Sam James 2025-02-23 02:21:27 UTC]

*** This bug has been marked as a duplicate of bug 675876 ***