Hi, I have a database which is built on suse enterprise server 11.2 with gcc4.3. It also runs on suse enterprise server 11.2. Now I want to upgrade gcc4.3 to gcc4.7 due to database application built env is upgraded to gcc4.7. But after I installed gcc4.7 set of packages on my database running machine, my database processes could not be started. I have to restore to gcc4.3 env so that my database can work well. So my question is why gcc4.7 is not compatible with gcc4.3? Or caused by different OS level based?(gcc4.3 is on Suse enterprise server 11.2, gcc4.7 is downloaded from opensuse web and is based on opensuse 12.2) I think higher OS should be compatible with lower version? Or because Suse enterprise server is not compatible with opensuse? Anyone can help? Thanks a lot! My gcc version $> gcc -v Using built-in specs. Target: x86_64-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.3 --enable-ssp --disable-libssp --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --program-suffix=-4.3 --enable-linux-futex --without-system-libunwind --with-cpu=generic --build=x86_64-suse-linux Thread model: posix gcc version 4.3.4 [gcc-4_3-branch revision 152973] (SUSE Linux) gcc4.7 packages, downloaded from http://download.opensuse.org/distribution/12.2/repo/oss/suse/x86_64/ I012486@XIYL50837199A:~/rje/gcc4.7> ll total 33704 -rw-r--r-- 1 I012486 audio 3972778 Aug 9 11:15 cpp47-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 173959 Aug 9 11:15 ctags-2011.8.2-6.1.2.x86_64.rpm -rw-r--r-- 1 I012486 audio 3953 Aug 9 11:15 gcc-32bit-4.7-2.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 4249 Aug 9 11:15 gcc-4.7-2.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 2110637 Aug 9 11:15 gcc47-32bit-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 6404284 Aug 9 11:15 gcc47-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 4624261 Aug 9 11:15 gcc47-c++-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 4032 Aug 9 11:15 gcc-c++-32bit-4.7-2.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 4021 Aug 9 11:15 gcc-c++-4.7-2.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 1653413 Aug 9 11:15 glibc-2.15-22.6.4.x86_64.rpm -rw-r--r-- 1 I012486 audio 1172675 Aug 9 11:15 glibc-32bit-2.15-22.6.4.x86_64.rpm -rw-r--r-- 1 I012486 audio 638797 Aug 9 11:15 glibc-devel-2.15-22.6.4.x86_64.rpm -rw-r--r-- 1 I012486 audio 101781 Aug 9 11:15 glibc-devel-32bit-2.15-22.6.4.x86_64.rpm -rw-r--r-- 1 I012486 audio 6185251 Aug 9 11:16 glibc-locale-2.15-22.6.4.x86_64.rpm -rw-r--r-- 1 I012486 audio 208 Aug 9 11:16 _install.sh -rw-r--r-- 1 I012486 audio 55605 Aug 9 11:15 libcloog0-0.15.10+ppl-10.1.4.x86_64.rpm -rw-r--r-- 1 I012486 audio 50879 Aug 9 11:15 libgcc47-32bit-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 42229 Aug 9 11:15 libgcc47-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 221882 Aug 9 11:15 libgmp10-5.0.5-3.3.3.x86_64.rpm -rw-r--r-- 1 I012486 audio 31531 Aug 9 11:15 libgomp47-32bit-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 29254 Aug 9 11:15 libgomp47-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 33658 Aug 9 11:15 libmpc2-0.8.2-15.1.3.x86_64.rpm -rw-r--r-- 1 I012486 audio 154130 Aug 9 11:15 libmpfr4-3.1.0-2.1.3.x86_64.rpm -rw-r--r-- 1 I012486 audio 333359 Aug 9 11:16 libppl9-0.11.2-11.1.3.x86_64.rpm -rw-r--r-- 1 I012486 audio 993469 Aug 9 11:16 libppl_c4-0.11.2-11.1.3.x86_64.rpm -rw-r--r-- 1 I012486 audio 253016 Aug 9 11:16 libstdc++47-32bit-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 241700 Aug 9 11:16 libstdc++47-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 1678025 Aug 9 11:16 libstdc++47-devel-32bit-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 2799586 Aug 9 11:16 libstdc++47-devel-4.7.1_20120723-1.1.1.x86_64.rpm -rw-r--r-- 1 I012486 audio 366928 Aug 9 11:16 make-3.82-151.1.2.x86_64.rpm -rw-r--r-- 1 I012486 audio 699 Aug 9 11:16 _resolve_conflict.sh Regards, Roy