build: remove `-bind_at

fanquake commented at 3:13 pm on November 3, 2023: member

This is deprecated on macOS:

0ld: warning: -bind_at_load is deprecated on macOS

and likely redundant anyways, given the behaviour of dyld3.

Unfortunately libtool is still injecting a -bind_at_load, because it’s version check is broken:

0	# Don't allow lazy linking, it breaks C++ global constructors
1	# But is supposedly fixed on 10.4 or later (yay!).
2	if test CXX = "$tagname"; then
3	  case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
4	    10.[0123])
5	      func_append compile_command " $wl-bind_at_load"
6	      func_append finalize_command " $wl-bind_at_load"
7	    ;;
8	  esac
9	fi

so this adds another change to strip them out at the end of configure.

Note that anywhere the ld64 warnings are being emitted, we are already not adding this flag to our hardened ldflags, because of -Wl,-fatal_warnings.

DrahtBot commented at 3:13 pm on November 3, 2023: contributor

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fanquake commented at 3:13 pm on November 3, 2023: member

@theuni @TheCharlatan you might have some libtool ideas? Couldn’t see too anything obvious to prune this out.

theuni commented at 4:23 pm on November 3, 2023: member

Yuck. The only thing I can think of is a sledgehammer hack similar to this ancient one: a98356fee8a44d7d1cb37f22c876fff8f244365e

theuni commented at 4:49 pm on November 3, 2023: member

Yuck. The only thing I can think of is a sledgehammer hack similar to this ancient one: a98356f

See https://github.com/theuni/bitcoin/commit/c61c9c5c772780be95ba7a8221ea13a72fe97d99 which is ugly but seems to work as intended.

fanquake force-pushed on Nov 8, 2023

fanquake commented at 10:28 am on November 8, 2023: member

See https://github.com/theuni/bitcoin/commit/c61c9c5c772780be95ba7a8221ea13a72fe97d99 which is ugly but seems to work as intended.

I do hate sed. Pulled this is for now, but open to any other approaches if anyone has suggestions.

One other point is that last time I looked, lld only implemented a placeholder option for -bind_at_load, and I’d assume at this point, they won’t bother actually implementing it, so after #21778 this flag will be even more of a no-op.

fanquake commented at 10:47 am on November 8, 2023: member

Guix Build (arm64):

0cf3250e32cf25ee1a75372bed2fb105fc893abd40662ed60b6376cd1f77586a1  guix-build-144deffe35b7/output/arm64-apple-darwin/SHA256SUMS.part
111a505365063b6234a8e205e3b30a5a7a9bb1b1cc6bf266b5038b18474edbd1f  guix-build-144deffe35b7/output/arm64-apple-darwin/bitcoin-144deffe35b7-arm64-apple-darwin-unsigned.tar.gz
2674f71f6c59e064e8f42a2f11c2406fea08873b6369b472f9662e8ee0c5567e4  guix-build-144deffe35b7/output/arm64-apple-darwin/bitcoin-144deffe35b7-arm64-apple-darwin-unsigned.zip
3c6fe023ee5e7fdcec8b42a4ac77c6303daf0b2fa61022009fb87e440f8e43a6a  guix-build-144deffe35b7/output/arm64-apple-darwin/bitcoin-144deffe35b7-arm64-apple-darwin.tar.gz
4f7658c6b212e04b6ced4afb471abca6eece9763ec9b912004ecf0b2f9c2bb7d8  guix-build-144deffe35b7/output/dist-archive/bitcoin-144deffe35b7.tar.gz
5d0e86a3eedbe3e944df7282936994d755580e69a4d7c7bd7fb4350e3bf670f81  guix-build-144deffe35b7/output/x86_64-apple-darwin/SHA256SUMS.part
67839a306c6fe7113b0fb390b11799903857594ac5b22ce92c77baca7f28adbdc  guix-build-144deffe35b7/output/x86_64-apple-darwin/bitcoin-144deffe35b7-x86_64-apple-darwin-unsigned.tar.gz
794edf9895f2d176810ed8025c779d11106a2176fe2dd7b331a34c99c30fb0a4a  guix-build-144deffe35b7/output/x86_64-apple-darwin/bitcoin-144deffe35b7-x86_64-apple-darwin-unsigned.zip
849441bbef48c0abc1ce7eba15cba9dc3562f8ab6e4cd402984f7c10849361dbf  guix-build-144deffe35b7/output/x86_64-apple-darwin/bitcoin-144deffe35b7-x86_64-apple-darwin.tar.gz

theuni commented at 5:04 pm on November 9, 2023: member

utACK.

Whoops, I butchered that commit message. I forgot to paste in the commit hash I was referencing. Mind fixing it up?

build: remove -bind_at_load usage

This is deprecated on macOS:
```bash
ld: warning: -bind_at_load is deprecated on macOS
```
and likely redundant anyways, given the behaviour of dyld3.

Unfortunately libtool is still injecting a `-bind_at_load`:
```bash
	# Don't allow lazy linking, it breaks C++ global constructors
	# But is supposedly fixed on 10.4 or later (yay!).
	if test CXX = "$tagname"; then
	  case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
	    10.[0123])
	      func_append compile_command " $wl-bind_at_load"
	      func_append finalize_command " $wl-bind_at_load"
	    ;;
	  esac
	fi
```
so this doesn't remove all the warnings, but removes us as a potential
source of them.

Note that anywhere the ld64 warnings are being emitted, we are already
not adding this flag to our hardened ldflags, because of `-Wl,-fatal_warnings`.

45257601da

fanquake commented at 5:08 pm on November 9, 2023: member

I forgot to paste in the commit hash I was referencing. Mind fixing it up?

Pretty sure it is there? “Similar to a98356fee8a44d7d1cb37f22c876fff8f244365e.”

theuni commented at 5:13 pm on November 9, 2023: member

I forgot to paste in the commit hash I was referencing. Mind fixing it up?

Pretty sure it is there? “Similar to a98356f.”

“build: Add an old hack similar to remove bind_at_load from libtool.” -> “build: Add an old hack to remove bind_at_load from libtool.”

I clearly copied “similar to” from one place to another and forgot to delete the first :)

build: Add an old hack to remove bind_at_load from libtool.

Similar to a98356fee8a44d7d1cb37f22c876fff8f244365e.

3c61c60b90

fanquake force-pushed on Nov 9, 2023

maflcko added the label DrahtBot Guix build requested on Nov 13, 2023

Sjors commented at 11:44 am on November 13, 2023: member

On Intel macOS 13.6 before this PR I get the warning 6 times:

 0./configure --with-gui --enable-wallet --disable-fuzz-binary --disable-bench --disable-tests
 1...
 2checking whether the linker accepts -Wl,-bind_at_load... no
 3...
 4make
 5...
 6  CXXLD    bitcoin-wallet
 7ld: warning: -single_module is obsolete
 8  CXXLD    bitcoin-util
 9ld: warning: -bind_at_load is deprecated on macOS
10ld: warning: -bind_at_load is deprecated on macOS
11ld: warning: -bind_at_load is deprecated on macOS
12ld: warning: -bind_at_load is deprecated on macOS
13ld: warning: -bind_at_load is deprecated on macOS
14ld: warning: ignoring duplicate libraries: '-levent'
15  AR       qt/libbitcoinqt.a
16  CXXLD    qt/bitcoin-qt
17ld: warning: -bind_at_load is deprecated on macOS
18ld: warning: ignoring duplicate libraries: '-levent', 'libbitcoin_util.a'
19...

With 3c61c60b90db1b6a77b3804784430fcd57b447b6 it’s gone:

 0./configure ...
 1...
 2  CFLAGS                  = -g -O2
 3  LDFLAGS                 = 
 4Removing -Wl,bind_at_load from libtool.
 5...
 6make
 7...
 8  CXXLD    bitcoin-wallet
 9  CXXLD    bitcoin-util
10  CXXLD    bitcoind
11ld: warning: -single_module is obsolete
12qt/macnotificationhandler.mm:27:9: warning: 'NSUserNotification' is deprecated:
13...
14  AR       qt/libbitcoinqt.a
15ld: warning: ignoring duplicate libraries: '-levent'
16  CXXLD    qt/bitcoin-qt
17ld: warning: ignoring duplicate libraries: '-levent', 'libbitcoin_util.a'

Quickly tested the QT binary still works.

theuni commented at 3:08 pm on November 13, 2023: member

utACK 3c61c60b90db1b6a77b3804784430fcd57b447b6.

hebasto commented at 3:41 pm on November 13, 2023: member

My Guix builds:

0x86_64
199a81851f831f102e8f52e3e75b72b9228b3317d79670c7093b40550a28681e9  guix-build-3c61c60b90db/output/arm64-apple-darwin/SHA256SUMS.part
23a6d8c63489481d3c58ed6a54b2b1264a2489932a0f1c528c453e620ec3f1c69  guix-build-3c61c60b90db/output/arm64-apple-darwin/bitcoin-3c61c60b90db-arm64-apple-darwin-unsigned.tar.gz
3816808b6c7df70c171bace2b95d66d34fb042b15f0d690c6f519479e5f3a57fd  guix-build-3c61c60b90db/output/arm64-apple-darwin/bitcoin-3c61c60b90db-arm64-apple-darwin-unsigned.zip
4dcac324ff8fa0081d55fc45d820fb78f797e4d73906c077d4edcd6d1c8815be9  guix-build-3c61c60b90db/output/arm64-apple-darwin/bitcoin-3c61c60b90db-arm64-apple-darwin.tar.gz
59cabe2608e8ced9ee3ab7cbae4b1db86ae1d5194673dcf1b30823556c8805694  guix-build-3c61c60b90db/output/dist-archive/bitcoin-3c61c60b90db.tar.gz
615c26a2865dfb2d7f45afdfc3da435ab578ece1a8726ac8d898485bdae713aca  guix-build-3c61c60b90db/output/x86_64-apple-darwin/SHA256SUMS.part
7ca7a13d89bcf73246603ea9afff0ce597b21529a7f786f13d4c2462ae707a942  guix-build-3c61c60b90db/output/x86_64-apple-darwin/bitcoin-3c61c60b90db-x86_64-apple-darwin-unsigned.tar.gz
89930a5a808d86f36cf82238ec691aae31ae9197984234dfe4572b80632ae4a6d  guix-build-3c61c60b90db/output/x86_64-apple-darwin/bitcoin-3c61c60b90db-x86_64-apple-darwin-unsigned.zip
961a0e53167268548daf0de9548fc9891598c4c938270e76be7361dd584edc5ec  guix-build-3c61c60b90db/output/x86_64-apple-darwin/bitcoin-3c61c60b90db-x86_64-apple-darwin.tar.gz

hebasto approved

hebasto commented at 4:10 pm on November 13, 2023: member

ACK 3c61c60b90db1b6a77b3804784430fcd57b447b6, tested on macOS Sonoma 14.1.1 (23B81, Apple M1) and Ubuntu 23.10 (cross-compiling for macOS). Also I’ve verified the actual diff in the libtool script.

fanquake merged this on Nov 14, 2023

fanquake closed this on Nov 14, 2023

fanquake deleted the branch on Nov 14, 2023

DrahtBot commented at 12:47 pm on November 14, 2023: contributor

Guix builds (on x86_64)

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*-arm64-apple-darwin.tar.gz	`0b5e2d7a3ba6fc2d...`	`1849570d8f0b974c...`
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guix_build.log.diff		`983ce5651443ebfb...`

DrahtBot removed the label DrahtBot Guix build requested on Nov 14, 2023

jonatack commented at 6:10 pm on November 14, 2023: member

Tested on ARM64 M1 Max with macOS Ventura 13.6 and the bind_at_load warnings are now gone. Thank you for fixing this.

hebasto referenced this in commit 3b612a0e47 on May 23, 2024

hebasto referenced this in commit 7bef149019 on May 23, 2024

kwvg referenced this in commit ee0bae3894 on Nov 7, 2024

kwvg referenced this in commit d7cb92aa7a on Nov 13, 2024

bitcoin locked this on Nov 13, 2024

build: remove -bind_at_load usage #28783

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Guix builds (on x86_64)

build: remove `-bind_at_load` usage #28783