Hi,
I am learning LFS BOOK:
http://www.linuxfromscratch.org/lfs/view/6.6/chapter05/adjusting.html
Below is a sed syntax I can't understand and haven't found a place to
learn it.
<code>
sed -e "/^\*cpp:$/{n;s,$, -isystem /tools/include,}"
</code>
I read "man sed" and "info sed" and googled but can't find this kind of
sed usage, can you give me a reference link on the internet or tell
me which section in "info sed"?
I knew "^" indicates the begin of a line and "$" indicates end of a
line, so "^\*cpp:$" indicates a line includes and only includes a
string "*cpp:". And, I also knew the effect of this command is append
string " -isystem /tools/include" to the end of the next line of line
"*cpp:" by a test. But what's meaning of the every part in "{n;s, $,
-isystem /tools/include,}" and how this command to achieve this
effect?
Thanks,
littlebat
--
http://linuxfromscratch.org/mailman/listinfo/lfs-support
FAQ: http://www.linuxfromscratch.org/lfs/faq.html
Unsubscribe: See the above information page
