63 lines
1.9 KiB
Text
63 lines
1.9 KiB
Text
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dnl Check for LIBUSB compiler flags. On success, set nut_have_libusb="yes"
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dnl and set LIBUSB_CFLAGS and LIBUSB_LDFLAGS. On failure, set
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dnl nut_have_libusb="no". This macro can be run multiple times, but will
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dnl do the checking only once.
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AC_DEFUN([NUT_CHECK_LIBUSB],
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[
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if test -z "${nut_have_libusb_seen}"; then
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nut_have_libusb_seen=yes
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dnl save CFLAGS and LDFLAGS
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CFLAGS_ORIG="${CFLAGS}"
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LDFLAGS_ORIG="${LDFLAGS}"
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AC_MSG_CHECKING(for libusb version via pkg-config)
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LIBUSB_VERSION=`pkg-config --silence-errors --modversion libusb`
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if test "$?" = "0"; then
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AC_MSG_RESULT(${LIBUSB_VERSION} found)
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CFLAGS="`pkg-config --silence-errors --cflags libusb`"
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LDFLAGS="`pkg-config --silence-errors --libs libusb`"
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else
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AC_MSG_CHECKING(via libusb-config)
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LIBUSB_VERSION=`libusb-config --version 2>/dev/null`
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if test "$?" = "0"; then
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AC_MSG_RESULT(${LIBUSB_VERSION} found)
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CFLAGS="`libusb-config --cflags 2>/dev/null`"
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LDFLAGS="`libusb-config --libs 2>/dev/null`"
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else
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AC_MSG_RESULT(not found)
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CFLAGS=""
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LDFLAGS="-lusb"
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fi
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fi
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AC_MSG_CHECKING(for libusb cflags)
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AC_ARG_WITH(usb-includes, [
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AC_HELP_STRING([--with-usb-includes=CFLAGS], [include flags for the libusb library])
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], [CFLAGS="${withval}"], [])
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AC_MSG_RESULT([${CFLAGS}])
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AC_MSG_CHECKING(for libusb ldflags)
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AC_ARG_WITH(usb-libs, [
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AC_HELP_STRING([--with-usb-libs=LDFLAGS], [linker flags for the libusb library])
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], [LDFLAGS="${withval}"], [])
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AC_MSG_RESULT([${LDFLAGS}])
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dnl check if libusb is usable
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AC_CHECK_HEADERS(usb.h, [nut_have_libusb=yes], [nut_have_libusb=no], [AC_INCLUDES_DEFAULT])
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AC_CHECK_FUNCS(usb_init, [], [nut_have_libusb=no])
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if test "${nut_have_libusb}" = "yes"; then
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dnl Check for libusb "force driver unbind" availability
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AC_CHECK_FUNCS(usb_detach_kernel_driver_np)
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LIBUSB_CFLAGS="${CFLAGS}"
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LIBUSB_LDFLAGS="${LDFLAGS}"
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fi
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dnl restore original CFLAGS and LDFLAGS
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CFLAGS="${CFLAGS_ORIG}"
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LDFLAGS="${LDFLAGS_ORIG}"
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fi
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])
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