I just realized that the HaikuPorts build system doesn't pick up on secondary architecture os headers. For example, gcc would generally be pre-configured to look for /boot/system/develop/headers/os However, mesa_x86 for example installs its headers to /boot/system/develp/headers/x86/os (done by HaikuPorter) Building libSDL2_x86 fails missing #include <OpenGLKit.h> as it doesn't exist in /boot/system/develop/headers/os but /boot/system/develop/headers/x86/os Looking at HaikuPorter, runConfigure adds the following include directory: 'includeDir': 'develop/headers' + secondaryArchSubDir, We could go about adding another includeDir to the configure options, however shouldn't secondary architecture compilers be looking in /boot/system/develop/headers/x86/os as well as /boot/system/develop/headers/os? (likely x86/os should be first) GCC2 primary - gcc -xc++ -E -v - --------------------------------------------------- GNU CPP version 2.95.3-haiku-2013_08_15 (i386 Haiku/ELF) using priority 5 #include "..." search starts here: #include <...> search starts here: /packages/gcc-2.95.3_2013_08_15-2/.self/develop/tools/lib/gcc-lib/i586-pc-ha iku/2.95.3-haiku-2013_08_15/../../../../include/g++ /packages/gcc-2.95.3_2013_08_15-2/.self/develop/tools/lib/gcc-lib/i586-pc-ha iku/2.95.3-haiku-2013_08_15/include /boot/system/develop/headers/os /boot/system/develop/headers/os/app /boot/system/develop/headers/os/device /boot/system/develop/headers/os/drivers /boot/system/develop/headers/os/game /boot/system/develop/headers/os/interface /boot/system/develop/headers/os/kernel /boot/system/develop/headers/os/locale /boot/system/develop/headers/os/mail /boot/system/develop/headers/os/media /boot/system/develop/headers/os/midi /boot/system/develop/headers/os/midi2 /boot/system/develop/headers/os/net /boot/system/develop/headers/os/storage /boot/system/develop/headers/os/support /boot/system/develop/headers/os/translation /boot/system/develop/headers/os/add-ons/graphics /boot/system/develop/headers/os/add-ons/input_server /boot/system/develop/headers/os/add-ons/screen_saver /boot/system/develop/headers/os/add-ons/tracker /boot/system/develop/headers/os/be_apps/Deskbar /boot/system/develop/headers/os/be_apps/NetPositive /boot/system/develop/headers/os/be_apps/Tracker /boot/system/develop/headers/3rdparty /boot/system/develop/headers/bsd /boot/system/develop/headers/glibc /boot/system/develop/headers/gnu /boot/system/develop/headers/posix /boot/system/develop/headers End of search list. The following default directories have been omitted from the search path: /boot/common/non-packaged/develop/headers /boot/common/develop/headers /boot/system/develop/headers/os/opengl End of omitted list. GCC4 secondary - gcc-x86 -xc++ -E -v - --------------------------------------------------- gcc version 4.7.3 (2013_08_12) COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=pentium' '-march=pentium' /boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/cc1plus -E -quiet -v -iprefix /boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/ - -fpic -Wno-multichar -mtune=pentium -march=pentium -Wno-ctor-dtor-privacy ignoring nonexistent directory "/boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/../../../ ../i586-pc-haiku/include" ignoring duplicate directory "/boot/system/develop/tools/x86/bin/../lib/gcc/../../lib/gcc/i586-pc-haiku/4 .7.3/../../../../include/c++/4.7.3" ignoring duplicate directory "/boot/system/develop/tools/x86/bin/../lib/gcc/../../lib/gcc/i586-pc-haiku/4 .7.3/../../../../include/c++/4.7.3/i586-pc-haiku" ignoring duplicate directory "/boot/system/develop/tools/x86/bin/../lib/gcc/../../lib/gcc/i586-pc-haiku/4 .7.3/../../../../include/c++/4.7.3/backward" ignoring duplicate directory "/boot/system/develop/tools/x86/bin/../lib/gcc/../../lib/gcc/i586-pc-haiku/4 .7.3/include" ignoring duplicate directory "/boot/system/develop/tools/x86/bin/../lib/gcc/../../lib/gcc/i586-pc-haiku/4 .7.3/include-fixed" ignoring nonexistent directory "/boot/system/develop/tools/x86/bin/../lib/gcc/../../lib/gcc/i586-pc-haiku/4 .7.3/../../../../i586-pc-haiku/include" ignoring nonexistent directory "/boot/common/non-packaged/develop/headers/x86" ignoring nonexistent directory "/boot/common/develop/headers/x86" ignoring nonexistent directory "/boot/system/develop/headers/os/opengl" #include "..." search starts here: #include <...> search starts here: /boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/../../../. ./include/c++/4.7.3 /boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/../../../. ./include/c++/4.7.3/i586-pc-haiku /boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/../../../. ./include/c++/4.7.3/backward /boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/include /boot/system/develop/tools/x86/bin/../lib/gcc/i586-pc-haiku/4.7.3/include-fi xed /boot/system/develop/headers/os /boot/system/develop/headers/os/app /boot/system/develop/headers/os/device /boot/system/develop/headers/os/drivers /boot/system/develop/headers/os/game /boot/system/develop/headers/os/interface /boot/system/develop/headers/os/kernel /boot/system/develop/headers/os/locale /boot/system/develop/headers/os/mail /boot/system/develop/headers/os/media /boot/system/develop/headers/os/midi /boot/system/develop/headers/os/midi2 /boot/system/develop/headers/os/net /boot/system/develop/headers/os/storage /boot/system/develop/headers/os/support /boot/system/develop/headers/os/translation /boot/system/develop/headers/os/add-ons/graphics /boot/system/develop/headers/os/add-ons/input_server /boot/system/develop/headers/os/add-ons/mail_daemon /boot/system/develop/headers/os/add-ons/registrar /boot/system/develop/headers/os/add-ons/screen_saver /boot/system/develop/headers/os/add-ons/tracker /boot/system/develop/headers/os/be_apps/Deskbar /boot/system/develop/headers/os/be_apps/NetPositive /boot/system/develop/headers/os/be_apps/Tracker /boot/system/develop/headers/3rdparty /boot/system/develop/headers/bsd /boot/system/develop/headers/glibc /boot/system/develop/headers/gnu /boot/system/develop/headers/posix /boot/system/develop/headers/x86 /boot/system/develop/headers End of search list. Notice that while the gcc-x86 searches /boot/system/develop/headers/x86, it doesn't search /boot/system/develop/headers/x86/os Thoughts? -- Alex