Under Mac OS X Homebrew and automake 1.14.
````
mymacmini:libusbx xiaofanc$ ./autogen.sh
glibtoolize: putting auxiliary files in `.'.
glibtoolize: copying file `./ltmain.sh'
glibtoolize: putting macros in AC_CONFIG_MACRO_DIR, `m4'.
glibtoolize: copying file `m4/libtool.m4'
glibtoolize: copying file `m4/ltoptions.m4'
glibtoolize: copying file `m4/ltsugar.m4'
glibtoolize: copying file `m4/ltversion.m4'
glibtoolize: copying file `m4/lt~obsolete.m4'
libusb/Makefile.am:57: warning: source file 'os/threads_windows.c' is in a
subdirectory,
libusb/Makefile.am:57: but option 'subdir-objects' is disabled
automake: warning: possible forward-incompatibility.
automake: At least a source file is in a subdirectory, but the 'subdir-objects'
automake: automake option hasn't been enabled. For now, the corresponding
output
automake: object file(s) will be placed in the top-level directory. However,
automake: this behaviour will change in future Automake versions: they will
automake: unconditionally cause object files to be placed in the same
subdirectory
automake: of the corresponding sources.
automake: You are advised to start using 'subdir-objects' option throughout your
automake: project, to avoid future incompatibilities.
libusb/Makefile.am:57: warning: source file 'os/threads_posix.c' is in a
subdirectory,
libusb/Makefile.am:57: but option 'subdir-objects' is disabled
libusb/Makefile.am:7: warning: source file 'os/darwin_usb.c' is in a
subdirectory,
libusb/Makefile.am:7: but option 'subdir-objects' is disabled
libusb/Makefile.am:5: warning: source file 'os/poll_posix.c' is in a
subdirectory,
libusb/Makefile.am:5: but option 'subdir-objects' is disabled
libusb/Makefile.am:6: warning: source file 'os/linux_usbfs.c' is in a
subdirectory,
libusb/Makefile.am:6: but option 'subdir-objects' is disabled
libusb/Makefile.am:21: warning: source file 'os/linux_netlink.c' is in a
subdirectory,
libusb/Makefile.am:21: but option 'subdir-objects' is disabled
libusb/Makefile.am:21: warning: source file 'os/linux_udev.c' is in a
subdirectory,
libusb/Makefile.am:21: but option 'subdir-objects' is disabled
libusb/Makefile.am:8: warning: source file 'os/openbsd_usb.c' is in a
subdirectory,
libusb/Makefile.am:8: but option 'subdir-objects' is disabled
libusb/Makefile.am:9: warning: source file 'os/poll_windows.c' is in a
subdirectory,
libusb/Makefile.am:9: but option 'subdir-objects' is disabled
libusb/Makefile.am:9: warning: source file 'os/windows_usb.c' is in a
subdirectory,
libusb/Makefile.am:9: but option 'subdir-objects' is disabled
...
````
---
Reply to this email directly or view it on GitHub:
https://github.com/libusbx/libusbx/issues/125#issuecomment-21720825
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