php 7/git buid on linux/64: fatal error @ 'Installing PEAR environment';

hi I'm building PHP7 on linux/64 git checkout PHP-7.0.0 cd PHP-7.0.0 git log | head commit dbf30365aa15b9044d75b8f77db570bf8fdf2726 Merge: 9cb8cb4 5ff259e Author: Ferenc Kovacs <tyrael@php.net> Date: Wed Jun 10 10:49:51 2015 +0200 Merge remote-tracking branch 'origin/master' into PHP-7.0.0 * origin/master: add missing NEWS entries add missing NEWS entries ./configure --enable-shared=yes --enable-static=no --enable-cli --enable-phar=shared --with-pear ... make ... Generating phar.php Generating phar.phar PEAR package PHP_Archive not installed: generated phar will require PHP's phar extension be enabled. clicommand.inc pharcommand.inc invertedregexiterator.inc directorygraphiterator.inc directorytreeiterator.inc phar.inc Build complete. Don't forget to run 'make test'. make install Installing shared extensions: /work/php7ext/ Installing PHP CLI binary: /work/php7/bin/ Installing PHP CLI man page: /work/php7/share/man/man1/ Installing PHP FPM binary: /work/php7/sbin/ Installing PHP FPM config: /work/php7/etc/ Installing PHP FPM man page: /work/php7/share/man/man8/ Installing PHP FPM status page: /work/php7/share/php/fpm/ Installing build environment: /work/php7/lib64/build/ Installing header files: /work/php7/include/php/ Installing helper programs: /work/php7/bin/ program: phpize program: php-config Installing man pages: /work/php7/share/man/man1/ page: phpize.1 page: php-config.1 Installing PEAR environment: /work/php7/share/pear/ Warning: main(phar://install-pear-nozlib.phar/index.php): failed to open stream: "PHP_Archive::stream_open" call failed in /work/src/php7-src/pear/install-pear-nozlib.phar on line 1236 Warning: Uncaught EngineException: Call to undefined function ereg_replace() in /work/src/php7-src/pear/install-pear-nozlib.phar:566 Stack trace: #0 /work/src/php7-src/pear/install-pear-nozlib.phar(729): PHP_Archive::processFile('phar://install-...') #1 /work/src/php7-src/pear/install-pear-nozlib.phar(790): PHP_Archive->initializeStream('phar://install-...') #2 /work/src/php7-src/pear/install-pear-nozlib.phar(777): PHP_Archive->_streamOpen('phar://install-...') #3 /work/src/php7-src/pear/install-pear-nozlib.phar(1236): PHP_Archive->stream_open('phar://install-...', 'rb', 129, NULL) #4 /work/src/php7-src/pear/install-pear-nozlib.phar(1236): require_once() #5 {main} thrown in /work/src/php7-src/pear/install-pear-nozlib.phar on line 566 Makefile:482: recipe for target 'install-pear-installer' failed make[1]: *** [install-pear-installer] Error 255 Makefile:485: recipe for target 'install-pear' failed make: *** [install-pear] Error 2 known issue or workaround? bob