Bug 263322 – Undefined symbol ____ilog2_NaN when compiling hardened sources 2.6.28-r3

• Status: RESOLVED CANTFIX
• Product: Gentoo Linux

[Description Francisco Blas Izquierdo Riera (RETIRED) 2009-03-21 23:43:15 UTC]

When compiling hardened sources 2.6.28-r3 without "Support for paging of anonymous memory (swap)" I get an ld error relating to a use of an undefined function: ____ilog2_NaN inside of mm/page-writeback.c


Reproducible: Always

Steps to Reproduce:
1.Configure the kernel without "Support for paging of anonymous memory (swap)"
2.run make

Actual Results:  
Compilations fails due to undefined symbol

Expected Results:  
The kernel compiles smoothly

Maybe it can affect previous versions and even vanilla kernels. I haven't tried.

[Comment 1 Francisco Blas Izquierdo Riera (RETIRED) 2009-03-21 23:55:50 UTC]

I forgot to say that, according to ld the responsible function is test_clear_page_writeback()

[Comment 2 Gordon Malm (RETIRED) 2009-03-22 17:40:06 UTC]

Please post emerge --info, the failing kernel config and the error message (along with about 10 lines leading up to it).

[Comment 3 Gordon Malm (RETIRED) 2009-03-23 16:08:38 UTC]

CCed upstream.  They may not need it for this particular issue, but would be cool if you would provide the requested information ahead of time to potentially prevent unnecessary back-and-forth.

[Comment 4 PaX Team 2009-03-23 19:49:07 UTC]

it's a vanilla linux bug, or that of gcc-3.4.6 as 4.3.3 compiles the code fine. since not many things depend on CONFIG_SWAP, i guess it's got something to do with PAGEFLAG_FALSE(SwapCache) in include/linux/page-flags.h but i leave the rest for the kernel devs to figure out ;).

[Comment 5 Gordon Malm (RETIRED) 2009-03-23 20:40:02 UTC]

klondike,

Can you try with sys-kernel/gentoo-sources-2.6.28-r4?

[Comment 6 Francisco Blas Izquierdo Riera (RETIRED) 2009-03-26 18:45:33 UTC]

Created attachment 186332 [details]
Kernel conmfig file

[Comment 7 Francisco Blas Izquierdo Riera (RETIRED) 2009-03-26 18:45:51 UTC]

Created attachment 186333 [details]
emerge --info

[Comment 8 Francisco Blas Izquierdo Riera (RETIRED) 2009-03-26 18:46:06 UTC]

Created attachment 186335 [details]
last lines before error message

[Comment 9 Francisco Blas Izquierdo Riera (RETIRED) 2009-03-26 18:48:31 UTC]

First, I beg your pardon for taking too long to post :( I don't have almost time from monday to wednesdays and this was a long weekend :/

All those are with r6 but are reproducible too on r4.

[Comment 10 Gordon Malm (RETIRED) 2009-10-27 00:46:42 UTC]

gcc-4.3.4 is stable and you should be able to compile a kernel without swap support with it.  Closing as CANTFIX.

[Comment 11 Francisco Blas Izquierdo Riera (RETIRED) 2009-11-03 03:51:56 UTC]

I can confirm that using gcc-4.3 solves the problem, feel free to close it as solved if you want :)

[Comment 12 Sergey Ya. Korshunoff 2010-04-24 01:12:08 UTC]

Created attachment 228941 [details]
real solution

look http://software.intel.com/en-us/articles/compiler-moblin2-kernel-sources-with-intel-compiler/
from Intel development about compiling kernel with icc. There is nothing special in kernel which cant be compiled with gcc 3.4.6 ... 4.1.2