[Nut-upsdev] Driver with calls to USB functions not linking

[Jim Klimov]

Do your drivers/Makefile.am rules for the resulting new program specify
dependencies to use similar to other USB-capable drivers? e.g.

````
blazer_usb_SOURCES = blazer.c blazer_usb.c $(LIBUSB_IMPL) usb-common.c
blazer_usb_LDADD = $(LDADD_DRIVERS) $(LIBUSB_LIBS) -lm
````

Jim

On Sat, Nov 2, 2024 at 2:30 AM William R. Elliot <bill at wreassoc.com> wrote:

> Hello again all.
>
> I am trying to use USB functions (non-HID) and I get a linker error
> for functions that are in the included usb-common.h file.
>
> Specifically, at the start, these functions:
> - warn_if_bad_usb_port_filename
> - nutusb_open
> - is_usb_device_supported
>
> Clearly the headers are there or I don't think the driver would
> compile. Can someone point me in the right direction please?
>
> Thank you,
>
> Bill
>
> Not sure if these USB related lines from the configuration run are
> relevant or not:
>
> checking for libregex version via pkg-config... none found
> checking for regex.h... yes
> checking whether regexec is declared... yes
> checking whether regcomp is declared... yes
> checking for libusb-1.0 version via pkg-config... 1.0.27 found
> checking for libusb(-0.1) version via pkg-config... 0.1.12 found
> checking for libusb-config... /usr/bin/libusb-config
> checking via /usr/bin/libusb-config... 0.1.12 found
> checking for libusb preferred version... 1.0.27 (libusb-1.0)
> checking for libusb cflags... -I/usr/include/libusb-1.0
> checking for libusb ldflags... -lusb-1.0
> checking for libusb.h... yes
> checking for libusb_init... yes
> checking for libusb_strerror... yes
> checking for libusb_kernel_driver_active... yes
> checking for libusb_set_auto_detach_kernel_driver... yes
> checking for libusb_detach_kernel_driver... yes
> checking for libusb_detach_kernel_driver_np... no
> checking for usb_detach_kernel_driver_np... no
> checking for libusb_get_port_number... yes
> checking whether to build USB drivers... yes (libusb-1.0)
> checking whether to install hotplug rules... no
> checking whether to generate scripts/udev/nut-usbups.rules... yes
> * build USB drivers:    yes (libusb-1.0)
>
>
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