* [Buildroot] NPTL compile error without MMU (ARM) @ 2014-03-27 6:33 Sangjung 2014-03-27 6:40 ` Thomas Petazzoni 0 siblings, 1 reply; 5+ messages in thread From: Sangjung @ 2014-03-27 6:33 UTC (permalink / raw) To: buildroot Dear developers. Hi. I found out that nptl make a compile error when MMU (i.e. 'Toolchain - Enable MMU support') is disabled. Detailed error message is as below. -------------------------------------------------------------------------------- In file included from libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.c:31:0: libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:17: error: 'fork' undeclared here (not in a function) libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:63:1: error: '__libc_fork' redeclared as different kind of symbol libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:23: note: previous declaration of '__libc_fork' was here libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:228:1: error: 'fork' redeclared as different kind of symbol libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:227:1: note: previous declaration of 'fork' was here libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:229:1: error: '__EI_fork' aliased to undefined symbol '__GI_fork' make[1]: *** [libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.os] Error 1 -------------------------------------------------------------------------------- This problem is already reported by Axel Lin. (Link: http://lists.uclibc.org/pipermail/uclibc-cvs/2013-May/031094.html) However, it looks like that this issue is not solved for a long time. If someone let me know the alternative solution, I'd be really happy. Thank you in advances. BRs, Sangjung ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Buildroot] NPTL compile error without MMU (ARM) 2014-03-27 6:33 [Buildroot] NPTL compile error without MMU (ARM) Sangjung @ 2014-03-27 6:40 ` Thomas Petazzoni 2014-03-27 7:11 ` Sangjung 2014-03-27 14:48 ` Sangjung Woo 0 siblings, 2 replies; 5+ messages in thread From: Thomas Petazzoni @ 2014-03-27 6:40 UTC (permalink / raw) To: buildroot Dear Sangjung, On Thu, 27 Mar 2014 15:33:41 +0900, Sangjung wrote: > Dear developers. > > Hi. I found out that nptl make a compile error when MMU (i.e. 'Toolchain > - Enable MMU support') is disabled. > > Detailed error message is as below. > > -------------------------------------------------------------------------------- > > In file included from > libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.c:31:0: > libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:17: error: > 'fork' undeclared here (not in a function) > libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:63:1: error: > '__libc_fork' redeclared as different kind of symbol > libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:23: note: > previous declaration of '__libc_fork' was here > libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:228:1: error: > 'fork' redeclared as different kind of symbol > libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:227:1: note: > previous declaration of 'fork' was here > libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:229:1: error: > '__EI_fork' aliased to undefined symbol '__GI_fork' > make[1]: *** [libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.os] Error 1 > -------------------------------------------------------------------------------- > > This problem is already reported by Axel Lin. > (Link: http://lists.uclibc.org/pipermail/uclibc-cvs/2013-May/031094.html) > > However, it looks like that this issue is not solved for a long time. > If someone let me know the alternative solution, I'd be really happy. Thanks for your report. The problem really looks like a uClibc problem, so I would suggest you to take the uClibc configuration file in output/build/uclibc-<version>/.config, and sent the report to the uClibc developers. I am also on the uClibc mailing list, so I will be able to add additional Buildroot-specific details if requested by the uClibc developers. Outside of this, it is interesting to see that you are looking at the ARM non-MMU support. Do you have an actual hardware platform? In fact, I have been interested by looking into ARM non-MMU support in Buildroot for a long time, but I have never found a hardware platform, or emulated platform, to test things on. If this is something you can help with, I'm pretty sure the ARM non-MMU support would make more significant progress. Thanks! Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Buildroot] NPTL compile error without MMU (ARM) 2014-03-27 6:40 ` Thomas Petazzoni @ 2014-03-27 7:11 ` Sangjung 2014-03-27 7:21 ` Thomas Petazzoni 2014-03-27 14:48 ` Sangjung Woo 1 sibling, 1 reply; 5+ messages in thread From: Sangjung @ 2014-03-27 7:11 UTC (permalink / raw) To: buildroot Dear Thomas. On 03/27/2014 03:40 PM, Thomas Petazzoni wrote: > Thanks for your report. The problem really looks like a uClibc problem, > so I would suggest you to take the uClibc configuration file in > output/build/uclibc-<version>/.config, and sent the report to the > uClibc developers. I am also on the uClibc mailing list, so I will be > able to add additional Buildroot-specific details if requested by the > uClibc developers. Thank you for your quick reply. I will also report this issue to uClibc mailing list ASAP. > > Outside of this, it is interesting to see that you are looking at the > ARM non-MMU support. Do you have an actual hardware platform? In fact, > I have been interested by looking into ARM non-MMU support in Buildroot > for a long time, but I have never found a hardware platform, or > emulated platform, to test things on. If this is something you can help > with, I'm pretty sure the ARM non-MMU support would make more > significant progress. Our target device is for very small wearable thing. Because of various issue such as power consumption and cost, ARM Cortex M (that is MMU-less) series are commonly used. BRs Sangjung ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Buildroot] NPTL compile error without MMU (ARM) 2014-03-27 7:11 ` Sangjung @ 2014-03-27 7:21 ` Thomas Petazzoni 0 siblings, 0 replies; 5+ messages in thread From: Thomas Petazzoni @ 2014-03-27 7:21 UTC (permalink / raw) To: buildroot Dear Sangjung, On Thu, 27 Mar 2014 16:11:29 +0900, Sangjung wrote: > On 03/27/2014 03:40 PM, Thomas Petazzoni wrote: > > Thanks for your report. The problem really looks like a uClibc problem, > > so I would suggest you to take the uClibc configuration file in > > output/build/uclibc-<version>/.config, and sent the report to the > > uClibc developers. I am also on the uClibc mailing list, so I will be > > able to add additional Buildroot-specific details if requested by the > > uClibc developers. > > Thank you for your quick reply. > I will also report this issue to uClibc mailing list ASAP. Excellent, thanks! > > Outside of this, it is interesting to see that you are looking at the > > ARM non-MMU support. Do you have an actual hardware platform? In fact, > > I have been interested by looking into ARM non-MMU support in Buildroot > > for a long time, but I have never found a hardware platform, or > > emulated platform, to test things on. If this is something you can help > > with, I'm pretty sure the ARM non-MMU support would make more > > significant progress. > > Our target device is for very small wearable thing. > Because of various issue such as power consumption and cost, > ARM Cortex M (that is MMU-less) series are commonly used. So I suppose these platforms have external RAM and Flash, right? Because most of the Cortex-M platforms I've seen have only the internal RAM and Flash of the Cortex-M processor, and the amount available internally is usually not sufficient to run Linux. Best regards, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Buildroot] NPTL compile error without MMU (ARM) 2014-03-27 6:40 ` Thomas Petazzoni 2014-03-27 7:11 ` Sangjung @ 2014-03-27 14:48 ` Sangjung Woo 1 sibling, 0 replies; 5+ messages in thread From: Sangjung Woo @ 2014-03-27 14:48 UTC (permalink / raw) To: buildroot Dear Thomas On 03/27/2014 03:40 PM, Thomas Petazzoni wrote: > Dear Sangjung, > > On Thu, 27 Mar 2014 15:33:41 +0900, Sangjung wrote: >> Dear developers. >> >> Hi. I found out that nptl make a compile error when MMU (i.e. 'Toolchain >> - Enable MMU support') is disabled. >> >> Detailed error message is as below. >> >> -------------------------------------------------------------------------------- >> >> In file included from >> libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.c:31:0: >> libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:17: error: >> 'fork' undeclared here (not in a function) >> libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:63:1: error: >> '__libc_fork' redeclared as different kind of symbol >> libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:23: note: >> previous declaration of '__libc_fork' was here >> libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:228:1: error: >> 'fork' redeclared as different kind of symbol >> libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:227:1: note: >> previous declaration of 'fork' was here >> libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:229:1: error: >> '__EI_fork' aliased to undefined symbol '__GI_fork' >> make[1]: *** [libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.os] Error 1 >> -------------------------------------------------------------------------------- >> >> This problem is already reported by Axel Lin. >> (Link: http://lists.uclibc.org/pipermail/uclibc-cvs/2013-May/031094.html) >> >> However, it looks like that this issue is not solved for a long time. >> If someone let me know the alternative solution, I'd be really happy. > Thanks for your report. The problem really looks like a uClibc problem, > so I would suggest you to take the uClibc configuration file in > output/build/uclibc-<version>/.config, and sent the report to the > uClibc developers. I am also on the uClibc mailing list, so I will be > able to add additional Buildroot-specific details if requested by the > uClibc developers. After looking into this issue for a while, in my opinion, buildroot generated the wrong configuration for uclibc. I also found out that the _SAME_ problem already reported in _uclibc_ Bugzilla. (URL: https://bugs.uclibc.org/show_bug.cgi?id=6224) What if you want to reproduce this error, 'qemu_arm_versatile_defconfig' could be used as below. Then, you will face the same errors that I reported. --------------------------------------------- $ make qemu_arm_versatile_defconfig Disable MMU (i.e. 'BR2_USE_MMU is not set' in .config) $ make --------------------------------------------- If I misunderstood something, let me know it. BRs Sangjung. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-03-27 14:48 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-03-27 6:33 [Buildroot] NPTL compile error without MMU (ARM) Sangjung 2014-03-27 6:40 ` Thomas Petazzoni 2014-03-27 7:11 ` Sangjung 2014-03-27 7:21 ` Thomas Petazzoni 2014-03-27 14:48 ` Sangjung Woo
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