Hi, I'm on Mac 10.6.4 64bit. I can successfully generate i386 binary by using CFLAGS=-m32 CXXFLAGS=-m32 LDFLAGS=-m32 ./configure Compiled binaries work fine on 10.6.4 but throw error on 10.5.x (10.5.2 and 10.5.8): FreeSWITCH/lib/libfreeswitch.1.dylib: unknown required load command 0x80000022 Looks like it need to target to the 10.5 SDK, so I tried: CFLAGS="-m32 -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-version-min=10.5" \ CXXFLAGS="-m32 -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-version-min=10.5" \ LDFLAGS="-m32 -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-version-min=10.5" \ ./configure But stop on the following errors on make: cc1: warnings being treated as errors In file included from /usr/include/i386/_structs.h:38, from /usr/include/machine/_structs.h:31, from /usr/include/sys/_structs.h:57, from /usr/include/sys/signal.h:154, from /usr/include/sys/wait.h:116, from /usr/include/stdlib.h:65, from ./src/include/switch.h:76, from src/switch_apr.c:33: /usr/include/mach/i386/_structs.h:91: warning: type of bit-field '__invalid' is a GCC extension /usr/include/mach/i386/_structs.h:92: warning: type of bit-field '__denorm' is a GCC extension /usr/include/mach/i386/_structs.h:93: warning: type of bit-field '__zdiv' is a GCC extension /usr/include/mach/i386/_structs.h:94: warning: type of bit-field '__ovrfl' is a GCC extension /usr/include/mach/i386/_structs.h:95: warning: type of bit-field '__undfl' is a GCC extension /usr/include/mach/i386/_structs.h:96: warning: type of bit-field '__precis' is a GCC extension /usr/include/mach/i386/_structs.h:97: warning: type of bit-field '<anonymous>' is a GCC extension /usr/include/mach/i386/_structs.h:98: warning: type of bit-field '__pc' is a GCC extension /usr/include/mach/i386/_structs.h:104: warning: type of bit-field '__rc' is a GCC extension /usr/include/mach/i386/_structs.h:111: warning: type of bit-field '<anonymous>' is a GCC extension /usr/include/mach/i386/_structs.h:112: warning: type of bit-field '<anonymous>' is a GCC extension /usr/include/mach/i386/_structs.h:149: warning: type of bit-field '__invalid' is a GCC extension /usr/include/mach/i386/_structs.h:150: warning: type of bit-field '__denorm' is a GCC extension /usr/include/mach/i386/_structs.h:151: warning: type of bit-field '__zdiv' is a GCC extension /usr/include/mach/i386/_structs.h:152: warning: type of bit-field '__ovrfl' is a GCC extension /usr/include/mach/i386/_structs.h:153: warning: type of bit-field '__undfl' is a GCC extension /usr/include/mach/i386/_structs.h:154: warning: type of bit-field '__precis' is a GCC extension /usr/include/mach/i386/_structs.h:155: warning: type of bit-field '__stkflt' is a GCC extension /usr/include/mach/i386/_structs.h:156: warning: type of bit-field '__errsumm' is a GCC extension /usr/include/mach/i386/_structs.h:157: warning: type of bit-field '__c0' is a GCC extension /usr/include/mach/i386/_structs.h:158: warning: type of bit-field '__c1' is a GCC extension /usr/include/mach/i386/_structs.h:159: warning: type of bit-field '__c2' is a GCC extension /usr/include/mach/i386/_structs.h:160: warning: type of bit-field '__tos' is a GCC extension /usr/include/mach/i386/_structs.h:161: warning: type of bit-field '__c3' is a GCC extension /usr/include/mach/i386/_structs.h:162: warning: type of bit-field '__busy' is a GCC extension In file included from ./src/include/switch.h:78, from src/switch_apr.c:33: /usr/include/stdarg.h:4:2: error: #include_next is a GCC extension In file included from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/libteletone/src/libteletone_generate.h:118, from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/libteletone/src/libteletone.h:139, from ./src/include/switch.h:141, from src/switch_apr.c:33: /usr/include/stdarg.h:4:2: error: #include_next is a GCC extension In file included from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/apr/include/apr_strings.h:55, from ./src/include/private/switch_core_pvt.h:51, from src/switch_apr.c:37: /usr/include/stdarg.h:4:2: error: #include_next is a GCC extension In file included from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/apr/include/apr_tables.h:29, from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/apr/include/apr_file_info.h:28, from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/apr/include/apr_file_io.h:29, from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/apr/include/apr_thread_proc.h:26, from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/apr/include/apr_portable.h:30, from ./src/include/private/switch_core_pvt.h:57, from src/switch_apr.c:37: /usr/include/stdarg.h:4:2: error: #include_next is a GCC extension In file included from /Users/seven/workspace/freeswitch/newi386/freeswitch/libs/apr/include/apr_lib.h:35, from src/switch_apr.c:62: /usr/include/stdarg.h:4:2: error: #include_next is a GCC extension make[1]: *** [libfreeswitch_la-switch_apr.lo] Error 1 make: *** [all] Error 2 I could build on a 10.5.x machine to release it, however, I still would like to build it on 10.6. Any hints are appreciated. Regards, Seven -- Blog: http://www.dujinfang.com Proj:  http://www.freeswitch.org.cn