Messages in this thread | | | Date | Mon, 15 Jan 2024 14:41:22 +0100 | From | Waldemar Brodkorb <> | Subject | Re: [Buildroot] [Automated-testing] Call for nommu LTP maintainer [was: Re: [PATCH 00/36] Remove UCLINUX from LTP] |
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Hi,
I want to clarify some things of the point of view of uClibc-ng support.
There is support for following configurations for noMMU targets: ARM: - FLAT with Linuxthreads supported (for Qemu you need a Linux patch) - FDPIC with NPTL supported (NPTL works only on real hardware not in Qemu) - ELF with Thread support not working
M68k: - FLAT with Linuxthreads supported - ELF with Thread support not working
RISCV64: - FLAT without Thread support - ELF with Thread support not working
RISCV32: - FLAT without Thread support, needs a small Linux Kernel patch
SH2/J2: - FLAT with Linuxthreads supported
Xtensa: - FLAT with Linuxthreads supported
There are some obsolete architectures supported by uClibc-ng, but no longer supported by Linux:
Blackfin: - FLAT with Linuxthreads supported - FDPIC
H8300: - FLAT with Linuxthreads supported
C6X: - DSBT
LM32: - FLAT
LTP requires NPTL to work, so the only testable platform is ARM with FDPIC right now. Unfortunately LTP 20230929 needs fork for some files:
RANLIB libltp.a /home/wbx/arm/toolchain_st-stm32f746g_uclibc-ng_cortex_m7_soft_eabi_thumb_nommu/usr/lib/gcc/arm-openadk-uclinuxfdpiceabi/13.2.0/../../../../arm-openadk-uclinuxfdpiceabi/bin/ld: ../../lib/libltp.a(tst_res.o): in function `tst_fork': /home/wbx/arm/build_st-stm32f746g_uclibc-ng_cortex_m7_soft_eabi_thumb_nommu/w-ltp-20230929-1/ltp-full-20230929/lib/tst_res.c:430:(.text+0x952): undefined reference to `fork' /home/wbx/arm/toolchain_st-stm32f746g_uclibc-ng_cortex_m7_soft_eabi_thumb_nommu/usr/lib/gcc/arm-openadk-uclinuxfdpiceabi/13.2.0/../../../../arm-openadk-uclinuxfdpiceabi/bin/ld: ../../lib/libltp.a(tst_test.o): in function `fork_testrun': /home/wbx/arm/build_st-stm32f746g_uclibc-ng_cortex_m7_soft_eabi_thumb_nommu/w-ltp-20230929-1/ltp-full-20230929/lib/tst_test.c:1597:(.text+0xf4e): undefined reference to `fork' /home/wbx/arm/toolchain_st-stm32f746g_uclibc-ng_cortex_m7_soft_eabi_thumb_nommu/usr/lib/gcc/arm-openadk-uclinuxfdpiceabi/13.2.0/../../../../arm-openadk-uclinuxfdpiceabi/bin/ld: ../../lib/libltp.a(tst_test.o): in function `safe_fork': /home/wbx/arm/build_st-stm32f746g_uclibc-ng_cortex_m7_soft_eabi_thumb_nommu/w-ltp-20230929-1/ltp-full-20230929/lib/tst_test.c:435:(.text+0x345c): undefined reference to `fork' collect2: error: ld returned 1 exit status gmake[8]: *** [../../include/mk/rules.mk:45: test01] Error 1 gmake[7]: *** [../include/mk/generic_trunk_target.inc:108: all] Error 2 gmake[6]: *** [Makefile:94: lib-all] Error 2 gmake[5]: *** [/home/wbx/arm/mk/pkg-bottom.mk:141: /home/wbx/arm/build_st-stm32f746g_uclibc-ng_cortex_m7_soft_eabi_thumb_nommu/w-ltp-20230929-1/ltp-full-20230929/.build_done] Error 2 gmake[4]: *** [Makefile:61: ltp-compile] Error 2 gmake[3]: *** [mk/build.mk:221: package/compile] Error 2 gmake[2]: *** [/home/wbx/arm/mk/build.mk:176: world] Error 2
So there is really work to be done to make the existing code work on noMMU.
best regards Waldemar
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