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15.20.9542.010; Mon, 26 Jan 2026 08:39:11 +0000 Content-Type: multipart/alternative; boundary="------------Ym5qoCyNbIf2oABMKTNzUmra" Message-ID: <8684a6b5-809b-41e4-a3b0-c99b424a1b2a@windriver.com> Date: Mon, 26 Jan 2026 16:39:03 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [oe-core][PATCH] bitbake.conf: remove DEBUG_PREFIX_MAP from TARGET_LDFLAGS To: rs@ti.com, richard.purdie@linuxfoundation.org, mathieu.dubois-briand@bootlin.com, alex@linutronix.de, otavio@ossystems.com.br, kexin.hao@windriver.com, tonyb@cybernetics.com Cc: afd@ti.com, detheridge@ti.com, denis@denix.org, reatmon@ti.com, openembedded-core@lists.openembedded.org, vijayp@ti.com References: <20260122194959.13457-2-rs@ti.com> Content-Language: en-US From: Changqing Li In-Reply-To: <20260122194959.13457-2-rs@ti.com> X-ClientProxiedBy: TYWPR01CA0024.jpnprd01.prod.outlook.com (2603:1096:400:aa::11) To DS0PR11MB7312.namprd11.prod.outlook.com (2603:10b6:8:11f::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email 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X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Mon, 26 Jan 2026 08:39:25 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/229974 --------------Ym5qoCyNbIf2oABMKTNzUmra Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 60Q5QLNB1378374 On 1/23/26 03:50, Randolph Sapp via lists.openembedded.org wrote: > CAUTION: This email comes from a non Wind River email account! > Do not click links or open attachments unless you recognize the sender = and know the content is safe. > > From: Randolph Sapp > > Now that the previous bug affecting binary reproducibility has been > addressed [1], we can revert this patch. This will resolve issues with > cgo applications becoming unreprodcible. > > Currently go considers link arguments to be sacred, meaning any change > should produce a different binary output. They ensure this by baking > link arguments into the intermediary output, changing the content ID of > that step. As such, the marco prefixes inadvertently end up adding buil= d > paths to the output binary instead of removing them if they are passed > as link arguments to cgo applications. > > These paths are later stripped out again, but at this point the content > ID of the dependency has changed and thus the build ID of the end > application will be affected by the cascade of hash changes. See the > upstream bug for more information [2]. > > This reverts commit fddaecc88979967d0e00e2fafdbaaabec030da9f. > > [1]https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101473 > [2]https://github.com/golang/go/issues/77218 > > Signed-off-by: Randolph Sapp > --- > > This resolves the previously reported emptty issues: > https://lists.openembedded.org/g/openembedded-core/message/228549 > > meta/conf/bitbake.conf | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf > index 88f4d0df69..da873c3f4e 100644 > --- a/meta/conf/bitbake.conf > +++ b/meta/conf/bitbake.conf > @@ -634,7 +634,7 @@ TARGET_LINK_HASH_STYLE ?=3D"${@['-Wl,--hash-style=3D= gnu',''][d.getVar('LINKER_HASH_ ASNEEDED ?=3D "-Wl,--as-needed" > > export LDFLAGS =3D "${TARGET_LDFLAGS}" > -TARGET_LDFLAGS =3D "-Wl,-O1 ${TARGET_LINK_HASH_STYLE} ${ASNEEDED} ${DE= BUG_PREFIX_MAP}" > +TARGET_LDFLAGS =3D "-Wl,-O1 ${TARGET_LINK_HASH_STYLE} ${ASNEEDED}" Hi, After check the related gcc bug and yocto bug,=C2=A0 gcc bug comments 21=20 ([1])=C2=A0 and yocto bug comments 13 ([2]), my understanding is that,=C2=A0 when lto is enabled,=C2=A0 even with gcc = fix [3],=C2=A0=20 we still need DEBUG_PREFIX_MAP in LDFLAGS to make bin reproducible. Also seems Tony's commit [4] is after gcc fix [= 3]. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101473#c21 [2] https://bugzilla.yoctoproject.org/show_bug.cgi?id=3D14481#c13 [3] https://gcc.gnu.org/g:7cc2df084b7977653a9b59cbc34a9ad500ae619c [4]=20 https://git.openembedded.org/openembedded-core/commit/?id=3Dfddaecc889799= 67d0e00e2fafdbaaabec030da9f @Tony, @Randolph, Could please correct me if my understanding is not=20 right, Thanks. //Changqing > # mips does not support GNU hash style therefore we override > LINKER_HASH_STYLE:mipsarch:libc-musl =3D "sysv" > > -- > 2.52.0 > > > -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- > Links: You receive all messages sent to this group. > View/Reply Online (#229857):https://lists.openembedded.org/g/openembedd= ed-core/message/229857 > Mute This Topic:https://lists.openembedded.org/mt/117408334/3616873 > Group Owner:openembedded-core+owner@lists.openembedded.org > Unsubscribe:https://lists.openembedded.org/g/openembedded-core/unsub [c= hangqing.li@windriver.com] > -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- > --------------Ym5qoCyNbIf2oABMKTNzUmra Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit


On 1/23/26 03:50, Randolph Sapp via lists.openembedded.org wrote:
CAUTION: This email comes from a non Wind River email account!
Do not click links or open attachments unless you recognize the sender and know the content is safe.

From: Randolph Sapp <rs@ti.com>

Now that the previous bug affecting binary reproducibility has been
addressed [1], we can revert this patch. This will resolve issues with
cgo applications becoming unreprodcible.

Currently go considers link arguments to be sacred, meaning any change
should produce a different binary output. They ensure this by baking
link arguments into the intermediary output, changing the content ID of
that step. As such, the marco prefixes inadvertently end up adding build
paths to the output binary instead of removing them if they are passed
as link arguments to cgo applications.

These paths are later stripped out again, but at this point the content
ID of the dependency has changed and thus the build ID of the end
application will be affected by the cascade of hash changes. See the
upstream bug for more information [2].

This reverts commit fddaecc88979967d0e00e2fafdbaaabec030da9f.

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101473
[2] https://github.com/golang/go/issues/77218

Signed-off-by: Randolph Sapp <rs@ti.com>
---

This resolves the previously reported emptty issues:
https://lists.openembedded.org/g/openembedded-core/message/228549

 meta/conf/bitbake.conf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 88f4d0df69..da873c3f4e 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -634,7 +634,7 @@ TARGET_LINK_HASH_STYLE ?= "${@['-Wl,--hash-style=gnu',''][d.getVar('LINKER_HASH_
 ASNEEDED ?= "-Wl,--as-needed"

 export LDFLAGS = "${TARGET_LDFLAGS}"
-TARGET_LDFLAGS = "-Wl,-O1 ${TARGET_LINK_HASH_STYLE} ${ASNEEDED} ${DEBUG_PREFIX_MAP}"
+TARGET_LDFLAGS = "-Wl,-O1 ${TARGET_LINK_HASH_STYLE} ${ASNEEDED}"

Hi,

After check the related gcc bug and yocto bug,  gcc bug comments 21 ([1])  and yocto bug comments 13 ([2]),

my understanding is that,  when lto is enabled,  even with gcc fix [3],  we still need DEBUG_PREFIX_MAP in LDFLAGS

to make bin reproducible. Also seems Tony's commit [4] is after gcc fix [3].

[1]  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101473#c21

[2]  https://bugzilla.yoctoproject.org/show_bug.cgi?id=14481#c13

[3]  https://gcc.gnu.org/g:7cc2df084b7977653a9b59cbc34a9ad500ae619c

[4]  https://git.openembedded.org/openembedded-core/commit/?id=fddaecc88979967d0e00e2fafdbaaabec030da9f


@Tony, @Randolph, Could please correct me if my understanding is not right, Thanks.

//Changqing 

 # mips does not support GNU hash style therefore we override
 LINKER_HASH_STYLE:mipsarch:libc-musl = "sysv"

--
2.52.0



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