| 02:03.44 | scheng | hi,wmat |
| 02:03.49 | scheng | still here? |
| 02:07.28 | scheng | have a question: is there possible that i build with march=armv7,but no thumb instruction? |
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| 02:46.12 | wmat | scheng: if I recall correctly (and I could be wrong here), just passing -mcpu=armv7 will exclude thumb2. In order to include thumb2, you need to pass both -mcpu=armv7 and -mthumb |
| 02:46.58 | wmat | when you print the multilibs, the @ symbols tell you the flags you need in order to obtain the target on the left of the semicolon |
| 02:47.49 | scheng | wmat : okay.. i'll try this ..thanks a lot.. |
| 03:03.40 | scheng | wmat: seems not ok. |
| 03:04.14 | scheng | i run a simple inlined arm assembler program "move r10, r10" |
| 03:04.31 | scheng | it give me error message: error: target CPU does not support ARM mode |
| 03:05.24 | scheng | wmat: the cmd run like :arm-linux-gcc -march=armv7 test.c |
| 03:06.38 | wmat | scheng: what's your target CPU? |
| 03:08.22 | scheng | you could see "march=armv7" |
| 03:08.53 | scheng | oh, is that you mean ? |
| 03:09.15 | wmat | scheng: armv7 is cortex_m3 which only supports thumb2, I believe |
| 03:09.54 | scheng | how i know it it cortex_m3? |
| 03:10.22 | wmat | if you know it's armv7, then it's cortex_m3 |
| 03:11.04 | scheng | but why cortex-a8 ,cortex-a9,cortex-r4? |
| 03:11.15 | scheng | why not |
| 03:11.31 | scheng | they are all armv7 ,i think.. |
| 03:12.58 | scheng | wmat: oh, do you mean the cross-compiler is cortex-m3? and only support the thumb2? |
| 03:13.33 | wmat | right |
| 03:13.34 | scheng | cause as run the -print-multi-lib |
| 03:13.44 | scheng | it says:thumb2;@mthumb@march=armv7 |
| 03:13.52 | scheng | oh... |
| 03:13.59 | wmat | I think you'll need a toolchain from CodeSourcery in order to support additional features of A8, A9, etc. |
| 03:14.12 | wmat | but I suspect they're not support by GNUARM yet |
| 03:14.20 | wmat | but I haven't checked recently |
| 03:14.36 | scheng | yeah.. you are right.. |
| 03:15.54 | scheng | http://www.codesourcery.com/sgpp/lite/arm |
| 03:17.31 | wmat | the Pro version is nice if you want an IDE |
| 03:17.43 | scheng | i used this one .. but you could see the output of "print-multi-lib" is not same with the discretion. |
| 03:17.48 | wmat | disclaimer: I used to work for them ;) |
| 03:18.23 | scheng | oh... really.. :) |
| 03:18.37 | wmat | you should download the Pro version as it comes with 30 days of Pro level support, and they're really good about helping people get up and compiling |
| 03:18.43 | scheng | actually, i like command line better.hoho..:) |
| 03:18.54 | wmat | i know, i know, we all do |
| 03:19.44 | scheng | okay..i'll try it..:) |
| 03:19.56 | wmat | but you can see the console output in the IDE and thereby glean the command line entries as well |
| 03:20.14 | scheng | yeah...right. |
| 03:20.16 | wmat | there's a Lite mailing lis as well |
| 03:20.54 | wmat | but having worked support there, I know e generally focused on the Pro level support cases first, including the 30 day evaluators |
| 03:21.02 | scheng | oh...man... |
| 03:34.27 | scheng | wmat: is that to say: the lite version is not support the ARM mode ,right ? |
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