Description:
------------
Your config.m4 is incorrect.  The following line:
    SEARCH_LIB="libleveldb.a"
should read:
    SEARCH_LIB="lib/libleveldb.a"

People don't put libraries into /usr or /usr/local, rather they put them into 
/usr/lib or /usr/local/lib.

SEARCH_FOR is correct; it's looking for /usr/include or /usr/local/include.  
SEARCH_LIB should be consistent and look for /usr/lib or /usr/local/lib.  By 
making the above change, it will be correct.

Please fix, and issue a new release so people can easily install your package.  
This will only help you.

Test script:
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sudo pecl install channel://pecl.php.net/leveldb-0.1.3

Fails even though you have downloaded and built leveldb, and linked include/leveldb to /usr/include/leveldb and linked the static and shared libraries into /usr/lib.



Expected result:
----------------
Should build and install successfully.

Actual result:
--------------
Does not build, due to not finding leveldb libraries, even though they are 
installed in the correct location.