Description:
------------
Compilation failes while generating phar.phar. This happens if php is configured with safe_mode to on.

Workaround?
Add -d 'safe_mode=0' to PHP_PHARCMD_SETTINGS

Reproduce code:
---------------
'./configure' '--without-mm' \
    '--with-mysql' '--prefix=/usr/lib/php5' \
    '--with-mcrypt' \
    '--enable-safe-mode' \
    '--with-openssl' '--with-zlib' '--enable-calendar' \
    '--enable-exif' '--enable-ftp' \
    '--with-gd' '--with-imap' '--with-kerberos' \
    '--with-imap-ssl' \
    '--enable-gd-native-ttf' \
    '--enable-force-cgi-redirect' \
    '--with-freetype-dir=/usr/include/freetype2' \
    '--with-jpeg-dir=/usr/lib' \
    '--with-gettext' '--with-iconv' '--enable-mbstring=all' \
    '--enable-mbregex' '--with-xsl' '--with-pdo-mysql'

Expected result:
----------------
Build complete.

Actual result:
--------------
Warning: shell_exec(): Cannot execute using backquotes in Safe Mode in /home/lars/php-5.3.0beta1/ext/phar/phar.php on line 706
Pear package PHP_Archive or Archive.php class file not found.

Warning: Phar::__construct(): SAFE MODE Restriction in effect.  The script whose uid is 0 is not allowed to access /home/lars/php-5.3.0beta1/ext/phar owned by uid 1001 in /home/lars/php-5.3.0beta1/ext/phar/phar.php on line 1055

Fatal error: Uncaught exception 'UnexpectedValueException' with message 'Phar creation or opening failed' in /home/lars/php-5.3.0beta1/ext/phar/phar.php:1055
Stack trace:
#0 /home/lars/php-5.3.0beta1/ext/phar/phar.php(1055): Phar->__construct('/home/lars/php-5.3.0...', 0, 'pharcommand')
#1 [internal function]: PharCommand->cli_cmd_run_pack(Array)
#2 /home/lars/php-5.3.0beta1/ext/phar/phar.php(225): call_user_func(Array, Array)
#3 /home/lars/php-5.3.0beta1/ext/phar/phar.php(2078): CLICommand->__construct(19, Array)
#4 {main}
  thrown in /home/lars/php-5.3.0beta1/ext/phar/phar.php on line 1055
make: *** [ext/phar/phar.phar] Fehler 255