Description:
------------
had to use "apt-get install libgpgme11-dev" to fix the problem

Reproduce code:
---------------
# pecl install gnupg
downloading gnupg-1.3.1.tgz ...
Starting to download gnupg-1.3.1.tgz (19,331 bytes)
(...)
In file included from /tmp/pear/cache/gnupg-1.3.1/gnupg.c:22:
/tmp/pear/cache/gnupg-1.3.1/php_gnupg.h:35: error: syntax error before 'gpgme_ctx_t'
/tmp/pear/cache/gnupg-1.3.1/php_gnupg.h:35: warning: no semicolon at end of struct or union
/tmp/pear/cache/gnupg-1.3.1/php_gnupg.h:36: warning: data definition has no type or storage class
/tmp/pear/cache/gnupg-1.3.1/php_gnupg.h:40: error: syntax error before '*' token
(...)
/tmp/pear/cache/gnupg-1.3.1/gnupg.c:1516: error: 'gpgme_signature' undeclared (first use in this function)
make: *** [gnupg.lo] Error 1
ERROR: `make' failed

Expected result:
----------------
Should have told me that libgpgme11-dev was missing. (I had 
installed libgpgme-dev instead.)

Actual result:
--------------
Just failed to compile w/o any hint. Thanks chinstrap from IRC 
for helping me solve it.