support_cross-compilation
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support_cross-compilation [2014-08-29 23:47] tbird20d created |
support_cross-compilation [2014-09-20 00:53] tbird20d |
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| Grant Likely has taken the lead of this effort, stating on the kernel summit mailing list that: | Grant Likely has taken the lead of this effort, stating on the kernel summit mailing list that: | ||
| - | (write what grant wrote here) | + | |
| + | In August, 2014, Grant Likely wrote (on the ksummit-discuss mailing list, [[http://lists.linuxfoundation.org/pipermail/ksummit-discuss/2014-August/001198.html|here]]): | ||
| + | |||
| + | <file> | ||
| + | I've also been doing some hacking. I've taken a good look at several | ||
| + | of the tools people are using. Guenter's scripts. Kevin & Olof's | ||
| + | scripts, your ttc, and the stuff I'm using personally, and then | ||
| + | started a new tool for booting and testing boards, pulling in bits and | ||
| + | pieces that look good. I've been able to come up with something that | ||
| + | works really well for me, will boot on qemu out-of-the-box, and is | ||
| + | easily extendible to real hardware like a board on a desk or a | ||
| + | personal board farm. I'll post my patches this coming week. Right now | ||
| + | I'm cleaning up some ugly bits and I need to graft in the logging from | ||
| + | Kevin's scripts. | ||
| + | </file> | ||
| + | |||
| + | |||
| + | ==== Tim's notes on cross-compilation ==== | ||
| + | Here are some notes about cross-compilation: | ||
| + | * Makefiles currently don't support KBUILD_OUTPUT or O= | ||
| + | * model in Makefile at top of srctree is 'make kselftest' | ||
| + | * build and run are a single thing | ||
| + | * kernel install is ignored (left as exercise for user) | ||
| + | * in lower Makefiles, have hardcoded ARCH stuff for specifying include dirs for user-space apps (ugh) | ||
| + | * mqueue uses 'gcc', direct execution, etc. | ||
| + | |||
| + | === build dependencies for different tests === | ||
| + | * mqueue uses -lrt -lpthread -lpopt | ||
| + | * ipc/msgque.c requires kernel headers from Linux 3.8 or later (which my Ubuntu system fails to provide) | ||
| + | |||
| + | |||
| + | === runtime dependencies for different tests === | ||
| + | * mqueue requires root for some tests | ||
| + | * mq_open_test, even when run as root, gets permission denied at mq_open at 202: | ||
| + | * ipc/msgque.c (msgque_test) requires root privileges | ||
| + | * net requires /bin/sh and requires root privileges | ||
| + | * sysctl requires /bin/sh, says it needs kernel.sysctl_writes_string=1, /proc/sys/ | ||
support_cross-compilation.txt · Last modified: 2014-09-20 00:53 by tbird20d
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