Problems using buildconf on OpenSolaris

Hi.     I've tried to compile php 5.3.4 adding Informix PDO  on an OpenSolaris 2009-6 system (prior to do so on productive server Solaris 9 Sparc). I installed gcc by OpenSolaris package, and m4 1.4 and  autoconf 2.13 from GNU sources (OpenSolaris has autoconf 2.5x and I wasn't able to install m4 package from OpenSolaris).     Next I ran buildconf, and it sent the following: ./buildconf --force produce que Forcing buildconf buildconf: checking installation... buildconf: autoconf version 2.13 (ok) make: fatal error in reader: build/build2.mk, line 31: Badly formed macro assignment Current working directory  /export/home/spool/php-5.3.4 *** Error code 1 The following command caused the error: make -s -f build/build2.mk make: Fatal error: Command failed for target 'all'     Did someone deal with this kind of problem on OpenSolaris or another unix O.S.?     Thanks in advance                                 Omar Muñoz