I posted this question on stack overflow but did not get any help. I used macports to update gcc to version 4.8.1. I would like to use that version to build libusbx 1.0.17. But when I './configure' and then 'make' libusbx I get "error: too many #pragma options align=reset" (see error bellow), and it fails to build. If I configure libusbx with 'CC=clang ./configure' and then 'make' it works fine but that is building with gcc 4.2, and that is not what I want. Is there any way to build libusbx with gcc 4.8 on mac? Reading through gcc docs (http://gcc.gnu.org/onlinedocs/gcc/Pragmas.html) it seems that gcc understands both "#pragma pack(1)" and "#pragma options align=reset," so I am not sure why I am getting this error. It seems to be related to this bug - http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50909, but I am not sure since this is an old bug and gcc 4.2 that comes with mac works. I am looking for a way to edit the header file, I do not want to patch and rebuild gcc. Thanks for any suggestions. In USB.h file the pragma's are in this form. #pragma pack(1) ... struct .... #pragma options align=reset What is the equivalent that works with gcc 4.8? They all seem to be paired correctly, so the issue must be that gcc 4.8 does not understand one or the other. ========================================== make all-recursive Making all in libusb CC libusb_1_0_la-core.lo CC libusb_1_0_la-descriptor.lo CC libusb_1_0_la-io.lo CC libusb_1_0_la-strerror.lo CC libusb_1_0_la-sync.lo CC libusb_1_0_la-hotplug.lo CC os/libusb_1_0_la-threads_posix.lo CC os/libusb_1_0_la-darwin_usb.lo In file included from /System/Library/Frameworks/IOKit.framework/Headers/usb/IOUSBLib.h:27:0, from os/darwin_usb.h:27, from os/darwin_usb.c:43: /System/Library/Frameworks/IOKit.framework/Headers/usb/USB.h:576:9: error: too many #pragma options align=reset #pragma options align=reset ^ In file included from /System/Library/Frameworks/IOKit.framework/Headers/usb/IOUSBLib.h:27:0, from os/darwin_usb.h:27, from os/darwin_usb.c:43: /System/Library/Frameworks/IOKit.framework/Headers/usb/USB.h:746:9: error: too many #pragma options align=reset #pragma options align=reset ^ /System/Library/Frameworks/IOKit.framework/Headers/usb/USB.h:797:9: error: too many #pragma options align=reset #pragma options align=reset ^ /System/Library/Frameworks/IOKit.framework/Headers/usb/USB.h:815:9: error: too many #pragma options align=reset #pragma options align=reset ^ /System/Library/Frameworks/IOKit.framework/Headers/usb/USB.h:835:9: error: too many #pragma options align=reset #pragma options align=reset ^ os/darwin_usb.c: In function 'darwin_get_device_descriptor': os/darwin_usb.c:58:76: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] #define DARWIN_CACHED_DEVICE(a) ((struct darwin_cached_device *) (((struct darwin_device_priv *)((a)->os_priv))->dev))
