| 1 |
Dear Guys and Gals, |
| 2 |
|
| 3 |
Gentoo on Android is about running Gentoo natively in a directory prefix |
| 4 |
on Android devices[1] in parallel with native Android, mentored by Luca. |
| 5 |
|
| 6 |
Progress report for the past 3 days, |
| 7 |
|
| 8 |
1. gcc specs hack is not that interesting as it first looks. |
| 9 |
- parsing or generating specs script is no fun. |
| 10 |
The best parser/generator is gcc itself |
| 11 |
- appending simple specs (suches -dynamic-linker=/xx/xx.so) feel |
| 12 |
not clever, appending --with-spec to configure either. |
| 13 |
|
| 14 |
Therefore, I decide not to use specs hack as the main building |
| 15 |
block. At the same time, it can be handy to do manual tuning |
| 16 |
with it. |
| 17 |
|
| 18 |
Relying on binutils wrapper is no good either. The solution |
| 19 |
finally falls on a mixed one between sysroot and native paths |
| 20 |
methods (ref. table in [2]). Where I make use of eprefixify of |
| 21 |
prefix.eclass to modify location of dynamic linker for *run |
| 22 |
time* and sysroot for *compile time*. |
| 23 |
|
| 24 |
2. Prefix/libc armhf works rock solid. It is now being "emerge -e |
| 25 |
@world" with the help of many distcc cross compilers. I have to |
| 26 |
leave my cell phone home for a constant power supply and |
| 27 |
ethernet connection (yes! USB ethernet adapter) though. |
| 28 |
|
| 29 |
3. A problem on RHEL 5.6 made me question how far could I go with |
| 30 |
ancient GNU/Linux environments. |
| 31 |
|
| 32 |
gcc bootstrap fails horribly in stage2 |
| 33 |
|
| 34 |
,---- |
| 35 |
| /dev/shm/portage/sys-devel/gcc-4.7.2-r1/work/build/gcc $ ./cc1 |
| 36 |
| cc1: internal compiler error: Segmentation fault |
| 37 |
| Please submit a full bug report, |
| 38 |
| with preprocessed source if appropriate. |
| 39 |
| See <http://bugs.gentoo.org/> for instructions. |
| 40 |
`---- |
| 41 |
|
| 42 |
The bug is related to VDSO. A full description of the problem is |
| 43 |
on stackoverflow[3]. I'd be very appreciated for any hints. |
| 44 |
|
| 45 |
So much for today. Cheers! |
| 46 |
Benda |
| 47 |
|
| 48 |
1. http://www.awa.tohoku.ac.jp/~benda/projects/android.html |
| 49 |
2. http://wiki.gentoo.org/wiki/Prefix/libc |
| 50 |
3. http://stackoverflow.com/questions/17406389/is-it-possible-to-turn-off-vdso-on-glibc-side |
Archives