pecl安装gnupg，无法提取package.xml

我在安装带有pecl的软件包时遇到问题。我的系统运行GentooLinux。它不接受我试图安装的软件包

# pecl install gnupg
downloading gnupg-1.3.3.tgz ...
Starting to download gnupg-1.3.3.tgz (19,141 bytes)
......done: 19,141 bytes
could not extract the package.xml file from "/var/tmp/pear/gnupg-1.3.3.tgz"
Download of "pecl/gnupg" succeeded, but it is not a valid package archive
Error: cannot download "pecl/gnupg"
Download failed
install failed

tarball看起来不错，确实有一个package.xml

# tar -zxvf /var/tmp/pear/gnupg-1.3.3.tgz 
package.xml
gnupg-1.3.3/tests/gnupg_oo_0001_import.phpt
gnupg-1.3.3/tests/gnupg_oo_encrypt.phpt
gnupg-1.3.3/tests/gnupg_oo_encryptsign.phpt
gnupg-1.3.3/tests/gnupg_oo_export.phpt
gnupg-1.3.3/tests/gnupg_oo_keyinfo.phpt
gnupg-1.3.3/tests/gnupg_oo_listsignatures.phpt
gnupg-1.3.3/tests/gnupg_oo_sign_clear.phpt
gnupg-1.3.3/tests/gnupg_oo_sign_detach.phpt
gnupg-1.3.3/tests/gnupg_oo_sign_detach_nonarmor.phpt
gnupg-1.3.3/tests/gnupg_oo_sign_normal.phpt
gnupg-1.3.3/tests/gnupg_oo_sign_normal_noarmor.phpt
gnupg-1.3.3/tests/gnupg_oo_zzz_deletekey.phpt
gnupg-1.3.3/tests/gnupg_res_0001_import.phpt
gnupg-1.3.3/tests/gnupg_res_encrypt.phpt
gnupg-1.3.3/tests/gnupg_res_encryptsign.phpt
gnupg-1.3.3/tests/gnupg_res_export.phpt
gnupg-1.3.3/tests/gnupg_res_keyinfo.phpt
gnupg-1.3.3/tests/gnupg_res_listsignatures.phpt
gnupg-1.3.3/tests/gnupg_res_sign_clear.phpt
gnupg-1.3.3/tests/gnupg_res_sign_detach.phpt
gnupg-1.3.3/tests/gnupg_res_sign_detach_nonarmor.phpt
gnupg-1.3.3/tests/gnupg_res_sign_normal.phpt
gnupg-1.3.3/tests/gnupg_res_sign_normal_noarmor.phpt
gnupg-1.3.3/tests/gnupg_res_zzz_deletekey.phpt
gnupg-1.3.3/tests/vars.inc
gnupg-1.3.3/config.m4
gnupg-1.3.3/EXPERIMENTAL
gnupg-1.3.3/gnupg.c
gnupg-1.3.3/gnupg_keylistiterator.c
gnupg-1.3.3/LICENSE
gnupg-1.3.3/php_gnupg.h
gnupg-1.3.3/php_gnupg_keylistiterator.h
gnupg-1.3.3/README

如果有人能更好地解释这一点并帮助我解决它，那就太好了。谷歌的搜索结果非常令人沮丧。似乎没有其他人有这个问题

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我曾经在Gentoo portage dev php/pecl gnupg中使用这个包，但它只支持5.3。因此，我需要从现在开始使用pecl来获取PHP5.5的模块。PHP5.3现在是EOL。

我找到了如何手动安装它的方法

解压包后，切换到其目录并运行以下命令

phpize 
aclocal 
libtoolize --force 
autoheader 
autoconf 
./configure 
make 
sudo make install