[glibc] cannot build on armv6

[keithspg]

I am trying to build hte current arch ARM glibc (and other packages) on armv6. I have updated a lot of packages since this architecture was removed from arch ARM, but this one continues to stump me. Looking for any help which may get me unstuck.

The error:
$this->bbcode_second_pass_code('', '
make[2]: Entering directory '/Rune_dev/armv6/glibc/src/glibc/csu'
python3 -B ../scripts/gen-as-const.py --cc="armv6l-unknown-linux-gnueabihf-gcc -std=gnu11 -fgnu89-inline -march=armv6 -mfloat-abi=hard
-mfpu=vfp -O2 -pipe -fstack-protector-strong -fno-plt -fexceptions -Wformat -Werror=format-security -fstack-clash-protection -g -fvar-
tracking-assignments -ffile-prefix-map=/Rune_dev/armv6/glibc/src=/usr/src/debug -Wall -Wwrite-strings -Wundef -fmerge-all-constants -fr
ounding-math -fstack-protector-strong -fno-common -Wstrict-prototypes -Wold-style-definition -fmath-errno -ftls-model=initial-exec
-I../include -I/Rune_dev/armv6/glibc/src/glibc-build/csu -I/Rune_dev/armv6/glibc/src/glibc-build -I../sysdeps/unix/sysv/linux/a
rm/le -I../sysdeps/unix/sysv/linux/arm -I../sysdeps/arm/nptl -I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux -I..
/sysdeps/nptl -I../sysdeps/pthread -I../sysdeps/gnu -I../sysdeps/unix/inet -I../sysdeps/unix/sysv -I../sysdeps/unix/arm -I../sysd
eps/unix -I../sysdeps/posix -I../sysdeps/arm/le/armv6 -I../sysdeps/arm/armv6 -I../sysdeps/arm/le -I../sysdeps/arm/include -I../sys
deps/arm -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754 -I../sysdeps/generi
c -I.. -I../libio -I. -nostdinc -isystem /usr/lib/gcc/armv6l-unknown-linux-gnueabihf/12.2.0/include -isystem /usr/lib/gcc/armv6l-unkno
wn-linux-gnueabihf/12.2.0/include-fixed -isystem /usr/include -D_LIBC_REENTRANT -include /Rune_dev/armv6/glibc/src/glibc-build/libc-mod
ules.h -DMODULE_NAME=libc -include ../include/libc-symbols.h -DTOP_NAMESPACE=glibc -DGEN_AS_CONST_HEADERS \
-MD -MP -MF /Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.h.dT \
-MT '/Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.h.d /Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.h'" \
../sysdeps/arm/tlsdesc.sym > /Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.hT
In file included from ../sysdeps/unix/sysv/linux/bits/sigcontext.h:30,
from ../signal/signal.h:301,
from ../include/signal.h:2,
from ../misc/sys/param.h:28,
from ../include/sys/param.h:1,
from ../sysdeps/generic/hp-timing-common.h:38,
from ../sysdeps/generic/hp-timing.h:24,
from ../nptl/descr.h:26,
from ../sysdeps/arm/nptl/tls.h:39,
from ../sysdeps/unix/sysv/linux/arm/tls.h:23,
from ../sysdeps/unix/sysv/linux/arm/sysdep.h:28,
from <stdin>:2:
/usr/include/asm/sigcontext.h:77:9: error: unknown type name ‘__uint128_t’
77 | __uint128_t vregs[32];
| ^~~~~~~~~~~
Traceback (most recent call last):
File "/Rune_dev/armv6/glibc/src/glibc/csu/../scripts/gen-as-const.py", line 120, in <module>
main()
File "/Rune_dev/armv6/glibc/src/glibc/csu/../scripts/gen-as-const.py", line 116, in main
consts = glibcextract.compute_c_consts(sym_data, args.cc)
File "/Rune_dev/armv6/glibc/src/glibc/scripts/glibcextract.py", line 63, in compute_c_consts
subprocess.check_call(cmd, shell=True)
File "/usr/lib/python3.10/subprocess.py", line 369, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command 'armv6l-unknown-linux-gnueabihf-gcc -std=gnu11 -fgnu89-inline -march=armv6 -mfloat-abi=hard -mfpu=vfp -O2 -pipe -fstack-protector-strong -fno-plt -fexceptions -Wformat -Werror=format-security -fstack-clash-protection -g -fvar-tracking-assignments -ffile-prefix-map=/Rune_dev/armv6/glibc/src=/usr/src/debug -Wall -Wwrite-strings -Wundef -fmerge-all-constants -frounding-math -fstack-protector-strong -fno-common -Wstrict-prototypes -Wold-style-definition -fmath-errno -ftls-model=initial-exec -I../include -I/Rune_dev/armv6/glibc/src/glibc-build/csu -I/Rune_dev/armv6/glibc/src/glibc-build -I../sysdeps/unix/sysv/linux/arm/le -I../sysdeps/unix/sysv/linux/arm -I../sysdeps/arm/nptl -I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux -I../sysdeps/nptl -I../sysdeps/pthread -I../sysdeps/gnu -I../sysdeps/unix/inet -I../sysdeps/unix/sysv -I../sysdeps/unix/arm -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/arm/le/armv6 -I../sysdeps/arm/armv6 -I../sysdeps/arm/le -I../sysdeps/arm/include -I../sysdeps/arm -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754 -I../sysdeps/generic -I.. -I../libio -I. -nostdinc -isystem /usr/lib/gcc/armv6l-unknown-linux-gnueabihf/12.2.0/include -isystem /usr/lib/gcc/armv6l-unknown-linux-gnueabihf/12.2.0/include-fixed -isystem /usr/include -D_LIBC_REENTRANT -include /Rune_dev/armv6/glibc/src/glibc-build/libc-modules.h -DMODULE_NAME=libc -include ../include/libc-symbols.h -DTOP_NAMESPACE=glibc -DGEN_AS_CONST_HEADERS -MD -MP -MF /Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.h.dT -MT '/Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.h.d /Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.h' -S -o /tmp/tmpcu0fmmx1/test.s -x c - < /tmp/tmpcu0fmmx1/test.c' returned non-zero exit status 1.
make[2]: *** [../Makerules:271: /Rune_dev/armv6/glibc/src/glibc-build/tlsdesc.h] Error 1
make[2]: Leaving directory '/Rune_dev/armv6/glibc/src/glibc/csu'
make[1]: *** [Makefile:484: csu/subdir_lib] Error 2
make: *** [Makefile:9: all] Error 2
==> ERROR: A failure occurred in build().
Aborting...')
I have modified the PKGBUILD to be 'similar' to the last version that built on armv6 by adding this line to force the armv6h architecture:
$this->bbcode_second_pass_code('', '# ALARM: Specify build host types
[[ $CARCH == "armv6h" ]] && _configure_flags+=(--host=armv6l-unknown-linux-gnueabihf --build=armv6l-unknown-linux-gnueabihf)
[[ $CARCH == "armv7h" ]] && _configure_flags+=(--host=armv7l-unknown-linux-gnueabihf --build=armv7l-unknown-linux-gnueabihf)
[[ $CARCH == "aarch64" ]] && _configure_flags+=(--host=aarch64-unknown-linux-gnu --build=aarch64-unknown-linux-gnu --enable-memory-t>')
I am using:
$this->bbcode_second_pass_code('', 'linux-api-headers 5.18.15-1
glibc 2.32-2
binutils 2.35-1
')
this is running in a chroot on an armv7 system, so when I list the kernel, I get:
$this->bbcode_second_pass_code('', '
[armv6 alarm@Build7h /Rune_dev/armv6]$ uname -a
Linux Build7h 5.15.81-1-rpi-ARCH #1 SMP Tue Dec 6 10:28:13 MST 2022 armv7l GNU/Linux')
I am guessing I need to add some flag to the compiler to define this, but have no real clue as to how to do it. When I try to build the latest binutils, I get the same thing. Any help appreciated.

Keith

[robg]

Without digging too deeply, the following line in the PKGBUILD stands out:
$this->bbcode_second_pass_code('', '# - Disabled distcc')
Along with
$this->bbcode_second_pass_code('', '--host=armv6l-unknown-linux-gnueabihf')
it seems to suggest (but I am by no means certain) that you are meant to build this package using a cross compiler (such as aarch64-linux-gnu-gcc for arm64).

@graysky may have a more educated opinion on this, provided he sees this topic.

If no answer is provided here, you should consider asking this question on Unix Stack Exchange or Stack Overflow.

[keithspg]

Thanks for the post. I will try to build the package on the same machine but running armv7 natively (not in an armv6 chroot) and see how it goes.
EDIT: Well, it does not build, but for a completely different reason. I have a hunch this is probably related to the reason wget fails on https lookups... the armv7 version fails tests at glibc/time
$this->bbcode_second_pass_code('', '[Makefile:484: time/tests] Error 2
[Makefile 9: check] Error 2
Error: Failure in check()')
will try re-build w/o the check...
EDIT2: I commented out the whole check section and it builds on armv7 and creates a package. If I could get this far on armv6...

[keithspg]

Well, I may have found it. If not 'it', I may have found a way to get glibc to build. It is building as I type this.
The only change I made was to downgrade linux-api-headers from linux-api-headers-5.18.15-1 to linux-api-headers-5.17.5-2.
What ill effects will this cause? Am I now to build glibc, then install it then build binutils then build gcc then build glibc again? Is that what this means?
$this->bbcode_second_pass_code('', 'toolchain build order: linux-api-headers->glibc->binutils->gcc->glibc->binutils->gcc')
What I am trying to do is update my build machine that builds armv6 packages so that I can update some of the packages to be consistent with my armv7 image.