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--- support_cross-compilation [2014-08-30 00:09]
tbird20d
+++ support_cross-compilation [2014-09-20 00:53] (current)
tbird20d
@@ Line 17: / Line 17: @@
 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/

Kernel self-test