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On 4/11/12 8:35 PM, 15102925731 wrote:
<blockquote
cite="mid:4d264c94.23050.136a4310eb6.Coremail.zhenkaixd@126.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<div style="line-height: 1.7; color: rgb(0, 0, 0); font-size:
14px; font-family: arial;">Ok, that makes sense!<br>
<br>
That is to say, I don't need a makefile (in which to specify the
path to kernel) to compile it. Just a clang command with some
option will do it, right?<br>
</div>
</blockquote>
<br>
Yes, you just need a clang command line. However, using the
kernel's Makefiles to figure out which -I and -D options to use will
make things easier.<br>
<br>
-- John T.<br>
<br>
<blockquote
cite="mid:4d264c94.23050.136a4310eb6.Coremail.zhenkaixd@126.com"
type="cite">
<div
style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><br>
<div>--<br>
<div>
<div>
<div><font color="#c0c0c0" size="2">
<div><font color="#c0c0c0"><font size="3"> <span
style="COLOR: #000000"> 祝好！</span></font></font></div>
<span style="COLOR: #000000">
<div> </div>
<div><font size="3"> 甄凯</font></div>
<div>
<div><font color="#c0c0c0"><font size="3">------------------------------------------------------------------------------------------------------</font></font></div>
</div>
<div><font color="#c0c0c0"><font size="3">2012-04-12</font></font></div>
</span></font></div>
<div><font color="#c0c0c0"><font size="3">------------------------------------------------------------------------------------------------------</font></font></div>
<div><font color="#c0c0c0"><font size="3">Name:
甄凯(ZhenKai)<br>
Homepage:<a class="moz-txt-link-freetext" href="http://www.renren.com/262729393">http://www.renren.com/262729393</a></font></font></div>
<div><font color="#c0c0c0"><font size="3">Email: </font><a
moz-do-not-send="true"
href="mailto:zhenkaixd@126.com" target="_blank"
_listener="1901"><font color="#0066cc" size="3">zhenkaixd@126.com</font></a><font
size="3"> or <a moz-do-not-send="true"
href="mailto:846227103@qq.com">846227103@qq.com</a></font></font></div>
<div><font color="#c0c0c0" size="3">TEL:
15810729006(Beijing)<br>
Address: Room I-406, Central Building, Tsinghua
University, Beijing, China. 100084.</font></div>
</div>
</div>
</div>
<br>
At 2012-04-12
09:31:43,"John Criswell" <a class="moz-txt-link-rfc2396E" href="mailto:criswell@illinois.edu"><criswell@illinois.edu></a> wrote:<br>
<blockquote id="isReplyContent" style="PADDING-LEFT: 1ex;
MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> On
4/11/12 8:25 PM, 15102925731 wrote:
<blockquote
cite="mid:4f9b730e.2280a.136a427ad44.Coremail.zhenkaixd@126.com"
type="cite">
<div style="line-height: 1.7; color: rgb(0, 0, 0);
font-size: 14px; font-family: arial;">Yeah, but I tried
that command and error message was generated:<br>
<br>
hellomodule.c:1:10: fatal error: 'linux/init.h' file not
found<br>
#include <linux/init.h><br>
^<br>
1 error generated.<br>
<br>
how to solve this problem??<br>
</div>
</blockquote>
<br>
Well, you do have to include all the -I and -D options so that
clang can find the Linux kernel header files. I don't know
off hand what those specific options are, but the easiest
thing to do is to build the kernel, grab the gcc command line
that compiles your .c file to a .o file, and then replace gcc
with clang and add the -emit-llvm option to the command line.<br>
<br>
-- John T.<br>
<br>
<blockquote
cite="mid:4f9b730e.2280a.136a427ad44.Coremail.zhenkaixd@126.com"
type="cite">
<div
style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><br>
Thanks!<br>
<br>
<div>--<br>
<div>
<div>
<div><font color="#c0c0c0" size="2">
<div><font color="#c0c0c0"><font size="3"> <span
style="COLOR: #000000"> 祝好！</span></font></font></div>
<span style="COLOR: #000000">
<div> </div>
<div><font size="3"> 甄凯</font></div>
<div>
<div><font color="#c0c0c0"><font size="3">------------------------------------------------------------------------------------------------------</font></font></div>
</div>
<div><font color="#c0c0c0"><font size="3">2012-04-12</font></font></div>
</span></font></div>
<div><font color="#c0c0c0"><font size="3">------------------------------------------------------------------------------------------------------</font></font></div>
<div><font color="#c0c0c0"><font size="3">Name:
甄凯(ZhenKai)<br>
Homepage:<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.renren.com/262729393">http://www.renren.com/262729393</a></font></font></div>
<div><font color="#c0c0c0"><font size="3">Email: </font><a
moz-do-not-send="true"
href="mailto:zhenkaixd@126.com"
target="_blank" _listener="1901"><font
color="#0066cc" size="3">zhenkaixd@126.com</font></a><font
size="3"> or <a moz-do-not-send="true"
href="mailto:846227103@qq.com">846227103@qq.com</a></font></font></div>
<div><font color="#c0c0c0" size="3">TEL:
15810729006(Beijing)<br>
Address: Room I-406, Central Building, Tsinghua
University, Beijing, China. 100084.</font></div>
</div>
</div>
</div>
<br>
At 2012-04-11 23:48:07,"John Criswell" <a
moz-do-not-send="true" class="moz-txt-link-rfc2396E"
href="mailto:criswell@illinois.edu"><criswell@illinois.edu></a>
wrote:<br>
<blockquote id="isReplyContent" style="PADDING-LEFT: 1ex;
MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
On 4/10/12 10:11 PM, 15102925731 wrote:
<blockquote
cite="mid:17dd7b99.6c38.1369f62c87a.Coremail.zhenkaixd@126.com"
type="cite">
<div style="line-height: 1.7; color: rgb(0, 0, 0);
font-size: 14px; font-family: arial;">It's actually
is .c file. <br>
I just want firstly to compile helloworldmodule.c
into helloworldmodule.bc.<br>
Then I run a LLVM pass on it to do some
optimization, and then I compile the modified .bc
file into .ko file.<br>
<br>
So, could you tell me how to compile
helloworldmodule.c into helloworldmodule.bc? I think
it's not the same command <b>"clang -O3 -emit-llvm
hello.c -c -o hello.bc". </b>Because it is a
device driver that will be at last compiled to be
.ko file.<br>
</div>
</blockquote>
<br>
No, that's exactly how you would do it, although you
might need to use GCC + Dragonegg instead of clang
because the Linux 3.0 kernel doesn't compile with Clang
out-of-the-box (at least for me, anyway).<br>
<br>
-- John T.<br>
<br>
<blockquote
cite="mid:17dd7b99.6c38.1369f62c87a.Coremail.zhenkaixd@126.com"
type="cite">
<div
style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><br>
Thank you!<br>
<br>
<div>--<br>
<div>
<div>
<div><font color="#c0c0c0" size="2">
<div><font color="#c0c0c0"><font size="3"> <span
style="COLOR: #000000">
祝好！</span></font></font></div>
<span style="COLOR: #000000">
<div> </div>
<div><font size="3"> 甄凯</font></div>
<div>
<div><font color="#c0c0c0"><font
size="3">------------------------------------------------------------------------------------------------------</font></font></div>
</div>
<div><font color="#c0c0c0"><font
size="3">2012-04-11</font></font></div>
</span></font></div>
<div><font color="#c0c0c0"><font size="3">------------------------------------------------------------------------------------------------------</font></font></div>
<div><font color="#c0c0c0"><font size="3">Name:
甄凯(ZhenKai)<br>
Homepage:<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.renren.com/262729393">http://www.renren.com/262729393</a></font></font></div>
<div><font color="#c0c0c0"><font size="3">Email: </font><a
moz-do-not-send="true"
href="mailto:zhenkaixd@126.com"
target="_blank" _listener="1901"><font
color="#0066cc" size="3">zhenkaixd@126.com</font></a><font
size="3"> or <a moz-do-not-send="true"
href="mailto:846227103@qq.com">846227103@qq.com</a></font></font></div>
<div><font color="#c0c0c0" size="3">TEL:
15810729006(Beijing)<br>
Address: Room I-406, Central Building,
Tsinghua University, Beijing, China.
100084.</font></div>
</div>
</div>
</div>
<br>
在 2012-04-11 09:56:21，"Justin Holewinski" <a
moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:justin.holewinski@gmail.com"><justin.holewinski@gmail.com></a>
写道：<br>
<blockquote id="isReplyContent" style="PADDING-LEFT:
1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc
1px solid"><br>
<div class="gmail_quote">2012/4/10 15102925731 <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:zhenkaixd@126.com">zhenkaixd@126.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div
style="line-height:1.7;font-size:14px;font-family:arial"> Hi,
my friends<br>
<br>
<br>
I know there is a difference between
compiling a linux module and a simple
helloworld programme.<br>
If I compile a helloworld.c file, the
command is <br>
<b>"clang -O3 -emit-llvm hello.c -c -o
hello.bc"</b><br>
But what the command should be if I want to
compile a linux module into a .bc file? (I
know it may be an easy question to you guys,
but I really don't know where to find the
answer on <a moz-do-not-send="true"
href="http://llvm.org" target="_blank">llvm.org</a>.)<br>
</div>
</blockquote>
<div><br>
</div>
<div>What do you mean by linux module? A shared
library (.so)? A kernel module (.ko)?</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div
style="line-height:1.7;font-size:14px;font-family:arial"><br>
Thank you!<br>
<br>
<br>
<br>
<br>
<div>--<br>
<div>
<div>
<div><font color="#c0c0c0">
<div><font color="#c0c0c0"><font
size="3"> <span style="">
祝好！</span></font></font></div>
<span style="">
<div> </div>
<div><font size="3"> 甄凯</font></div>
<div>
<div><font color="#c0c0c0"><font
size="3">------------------------------------------------------------------------------------------------------</font></font></div>
</div>
<div><font color="#c0c0c0"><font
size="3">2012-04-11</font></font></div>
</span></font></div>
<div><font color="#c0c0c0"><font
size="3">------------------------------------------------------------------------------------------------------</font></font></div>
<div><font color="#c0c0c0"><font
size="3">Name: 甄凯(ZhenKai)<br>
Homepage:<a
moz-do-not-send="true"
href="http://www.renren.com/262729393"
target="_blank">http://www.renren.com/262729393</a></font></font></div>
<div><font color="#c0c0c0"><font
size="3">Email: </font><a
moz-do-not-send="true"
href="mailto:zhenkaixd@126.com"
target="_blank"><font
color="#0066cc" size="3">zhenkaixd@126.com</font></a><font
size="3"> or <a
moz-do-not-send="true"
href="mailto:846227103@qq.com"
target="_blank">846227103@qq.com</a></font></font></div>
<div><font color="#c0c0c0" size="3">TEL:
15810729006(Beijing)<br>
Address: Room I-406, Central
Building, Tsinghua University,
Beijing, China. 100084.</font></div>
</div>
</div>
</div>
</div>
<br>
<br>
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<div><br>
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-- <br>
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<div>Thanks,</div>
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</div>
<div>Justin Holewinski</div>
<br>
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