Bug 15709

Summary:	Building BR2_PACKAGE_LIBOPENSSL_BIN=y broken with defconfig bootlin-armv7m-uclibc
Product:	buildroot	Reporter:	Bernd Kuhls <bernd>
Component:	Other	Assignee:	unassigned
Status:	RESOLVED MOVED
Severity:	normal	CC:	buildroot, yann.morin.1998
Priority:	P5
Version:	unspecified
Target Milestone:	---
Hardware:	All
OS:	Linux
Host:		Target:
Build:
Attachments:	defconfig

Description Bernd Kuhls 2023-07-25 18:41:38 UTC

Created attachment 9628 [details]
defconfig

/home/bernd/buildroot/br4/output/per-package/libopenssl/host/opt/ext-toolchain/arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: ./libcrypto.a(libcrypto-lib-threads_pthread.o): in function `CRYPTO_atomic_or':
threads_pthread.c:(.text+0xf6): undefined reference to `__atomic_is_lock_free'
/home/bernd/buildroot/br4/output/per-package/libopenssl/host/opt/ext-toolchain/arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: threads_pthread.c:(.text+0x106): undefined reference to `__atomic_fetch_or_8'
/home/bernd/buildroot/br4/output/per-package/libopenssl/host/opt/ext-toolchain/arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: ./libcrypto.a(libcrypto-lib-threads_pthread.o): in function `CRYPTO_atomic_load':
threads_pthread.c:(.text+0x158): undefined reference to `__atomic_is_lock_free'
/home/bernd/buildroot/br4/output/per-package/libopenssl/host/opt/ext-toolchain/arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: threads_pthread.c:(.text+0x162): undefined reference to `__atomic_load_8'

The toolchain contains libatomic
$ find output/per-package/libopenssl/host/arm-buildroot-uclinux-uclibcgnueabi/sysroot/ | grep atomic
output/per-package/libopenssl/host/arm-buildroot-uclinux-uclibcgnueabi/sysroot/lib/libatomic.la
output/per-package/libopenssl/host/arm-buildroot-uclinux-uclibcgnueabi/sysroot/lib/libatomic.a

Adding -latomic to the openssl configure script fixes the build error.

BR2_TOOLCHAIN_HAS_LIBATOMIC is not enabled:

$ grep ATOMIC .config
BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS=y
BR2_TOOLCHAIN_HAS_ATOMIC=y
BR2_PACKAGE_PULSEAUDIO_HAS_ATOMIC=y
BR2_PACKAGE_LIBATOMIC_OPS_ARCH_SUPPORTS=y
# BR2_PACKAGE_LIBATOMIC_OPS is not set

The reason why buildroot does not enable BR2_TOOLCHAIN_HAS_LIBATOMIC is the binfmt used:

$ grep BINFMT .config
BR2_BINFMT_FLAT=y
BR2_BINFMT_FLAT_ONE=y
# BR2_BINFMT_FLAT_SEP_DATA is not set

which leads to BR2_TOOLCHAIN_HAS_LIBATOMIC not being enabled:
https://git.busybox.net/buildroot/tree/toolchain/Config.in#n851

Comment 1 Bernd Kuhls 2023-07-25 18:43:41 UTC

The same error occurs with the defconfig bootlin-m68k-5208-uclibc.

Comment 2 Yann E. MORIN 2024-06-15 15:11:56 UTC

Thank you for your report.

The issue tracker for the Buildroot project has been moved to
the Gitlab.com issue tracker:
    https://gitlab.com/buildroot.org/buildroot/-/issues

We are taking this opportunity to close old issues in this old
tracker. If you believe your issue is still relevant, please
open one in the new issue tracker.

Thank you!