Gwenview build errors

The following messages appear when building gwenview: /opt/trinity/include/ntqglobal.h:711: error: 'INT32' has a previous declaration as 'typedef int INT32' Configure output: checking libmng.h usability... no checking libmng.h presence... yes configure: WARNING: libmng.h: present but cannot be compiled configure: WARNING: libmng.h: check for missing prerequisite headers? configure: WARNING: libmng.h: see the Autoconf documentation configure: WARNING: libmng.h: section "Present But Cannot Be Compiled" configure: WARNING: libmng.h: proceeding with the compiler's result checking for libmng.h... no Configure.log: #include <libmng.h> configure:25086: result: no configure:25086: checking libmng.h presence configure:25086: g++ -E -DQT_THREAD_SUPPORT -D_REENTRANT -I/opt/trinity/include -I. -include tqt.h -I/opt/trinity/include/tde -I/usr/include/tqt conftest.cpp configure:25086: $? = 0 configure:25086: result: yes configure:25086: WARNING: libmng.h: present but cannot be compiled configure:25086: WARNING: libmng.h: check for missing prerequisite headers? configure:25086: WARNING: libmng.h: see the Autoconf documentation configure:25086: WARNING: libmng.h: section "Present But Cannot Be Compiled" configure:25086: WARNING: libmng.h: proceeding with the compiler's result configure:25086: checking for libmng.h configure:25086: result: no configure:25161: WARNING: Can't find libmng.h, Gwenview won't be compiled with MNG support Darrell