Andrew Benton wrote:
> On Tue, 13 Dec 2011 00:16:39 +0000
> Andrew Benton <[email protected]> wrote:
>
>> On Mon, 12 Dec 2011 15:34:42 -0600
>> Bruce Dubbs <[email protected]> wrote:
>>
>>> Then why is is working for me? Note 'sed -ir'
>> Sorry, I hadn't noticed the -r
>>
>>> $cat sedtest
>>> USEDLIBS module.a
>>>
>>> $ cat sedtest | sed -r -e '/^USEDLIBS/s# ([A-Za-z]*).a# -l\1#g'
>>> USEDLIBS -lmodule
>> Works the same here, but I don't know why. According to:
>> http://en.wikipedia.org/wiki/Regular_expression#POSIX_Extended_Regular_Expressions
>>
>> "support is removed for \n backreferences", but if that's true then why
>> does the backreference work?
> However, when I try the commands as they are in the book I get this:
>
> configure: creating ./config.status
...
> sed: -e expression #3, char 35: invalid reference \1 on `s' command's RHS
I think I made an error. What my script has is:
find -name Makefile -exec \
sed -ir -e '/^LIBRARYNAME/a SHARED_LIBRARY = 1' \
-e 's#BUILD_ARCHIVE :*= 1#NO_&#' \
-e '/^USEDLIBS/s# \([A-Za-z]*\).a# -l\1#g' \
-e 's#^USEDLIBS#LDFLAGS#' {} \;
The parens should be escaped. That didn't make it into the book.
I'll fix it.
-- Bruce
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