Bug 798175

gpg2 (GnuPG) doesn't support BZIP2 compression algorithm.

~/.gnupg/gpg.conf:
...
default-preference-list SHA512 SHA384 SHA256 SHA224 AES256 AES192 AES CAST5 ZLIB ZIP BZIP2 Uncompressed

% gpg --version              
gpg (GnuPG) 2.0.19
libgcrypt 1.5.0
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Home: ~/.gnupg
Supported algorithms:
Pubkey: RSA, ELG, DSA, ELG
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH, CAMELLIA128, 
        CAMELLIA192, CAMELLIA256
Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB

% gpg --list-keys local       
gpg: enabled debug flags: memstat
gpg: invalid item `BZIP2' in preference string
gpg: invalid default preferences
random usage: poolsize=600 mixed=0 polls=0/0 added=0/0
              outmix=0 getlvl1=0/0 getlvl2=0/0
secmem usage: 0/32768 bytes in 0 blocks
[1]    4492 exit 2     gpg --list-keys local

BZIP2 algorithm described in RFC4880
http://tools.ietf.org/html/rfc4880#section-9.3


From build log:
...
[   78s] checking for zlib.h... yes
[   78s] checking for deflateInit2_ in -lz... yes
[   78s] checking for bzlib.h... no

So we need to add libbz2-devel to buildrequires.

Fixed package:
https://build.opensuse.org/package/show?package=gpg2&project=home%3ALazy_Kent%3Abranches%3ABase%3ASystem

I've tested and it works as expected.

% gpg --version
gpg (GnuPG) 2.0.19
libgcrypt 1.5.0
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Home: ~/.gnupg
Supported algorithms:
Pubkey: RSA, ELG, DSA, ELG
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH, CAMELLIA128, 
        CAMELLIA192, CAMELLIA256
Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2

% gpg --list-keys local
gpg: enabled debug flags: memstat
pub   1024D/37FE4D3A 2003-12-14
uid                  local
sub   2048g/5CA9FDF1 2003-12-14
sub   4096R/AFB5629F 2005-09-14

random usage: poolsize=600 mixed=0 polls=0/0 added=0/0
              outmix=0 getlvl1=0/0 getlvl2=0/0
secmem usage: 0/32768 bytes in 0 blocks