configure, meson: convert libusb detection to meson

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -374,7 +374,7 @@ spice_protocol="auto"
 rbd="auto"
 smartcard="$default_feature"
 u2f="auto"
-libusb="$default_feature"
+libusb="auto"
 usb_redir="$default_feature"
 opengl="$default_feature"
 cpuid_h="no"
@@ -1285,9 +1285,9 @@ for opt do
   ;;
   --enable-u2f) u2f="enabled"
   ;;
-  --disable-libusb) libusb="no"
+  --disable-libusb) libusb="disabled"
   ;;
-  --enable-libusb) libusb="yes"
+  --enable-libusb) libusb="enabled"
   ;;
   --disable-usb-redir) usb_redir="no"
   ;;
@@ -3994,20 +3994,6 @@ if test "$smartcard" != "no"; then
     fi
 fi
 
-# check for libusb
-if test "$libusb" != "no" ; then
-    if $pkg_config --atleast-version=1.0.13 libusb-1.0; then
-        libusb="yes"
-        libusb_cflags=$($pkg_config --cflags libusb-1.0)
-        libusb_libs=$($pkg_config --libs libusb-1.0)
-    else
-        if test "$libusb" = "yes"; then
-            feature_not_found "libusb" "Install libusb devel >= 1.0.13"
-        fi
-        libusb="no"
-    fi
-fi
-
 # check for usbredirparser for usb network redirection support
 if test "$usb_redir" != "no" ; then
     if $pkg_config --atleast-version=0.6 libusbredirparser-0.5; then
@@ -5631,12 +5617,6 @@ if test "$smartcard" = "yes" ; then
   echo "SMARTCARD_LIBS=$libcacard_libs" >> $config_host_mak
 fi
 
-if test "$libusb" = "yes" ; then
-  echo "CONFIG_USB_LIBUSB=y" >> $config_host_mak
-  echo "LIBUSB_CFLAGS=$libusb_cflags" >> $config_host_mak
-  echo "LIBUSB_LIBS=$libusb_libs" >> $config_host_mak
-fi
-
 if test "$usb_redir" = "yes" ; then
   echo "CONFIG_USB_REDIR=y" >> $config_host_mak
   echo "USB_REDIR_CFLAGS=$usb_redir_cflags" >> $config_host_mak
@@ -6215,6 +6195,7 @@ if test "$skip_meson" = no; then
         -Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf -Dnvmm=$nvmm \
         -Dxen=$xen -Dxen_pci_passthrough=$xen_pci_passthrough -Dtcg=$tcg \
         -Dcocoa=$cocoa -Dgtk=$gtk -Dmpath=$mpath -Dsdl=$sdl -Dsdl_image=$sdl_image \
+        -Dlibusb=$libusb \
         -Dvnc=$vnc -Dvnc_sasl=$vnc_sasl -Dvnc_jpeg=$vnc_jpeg -Dvnc_png=$vnc_png \
         -Dgettext=$gettext -Dxkbcommon=$xkbcommon -Du2f=$u2f -Dvirtiofsd=$virtiofsd \
         -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt -Dbrlapi=$brlapi \

hw/usb/meson.build

@@ -72,7 +72,7 @@ if config_host.has_key('CONFIG_USB_REDIR')
 endif
 
 # usb pass-through
-softmmu_ss.add(when: ['CONFIG_USB', 'CONFIG_USB_LIBUSB', libusb],
+softmmu_ss.add(when: ['CONFIG_USB', libusb],
                if_true: files('host-libusb.c'),
                if_false: files('host-stub.c'))
 softmmu_ss.add(when: 'CONFIG_ALL', if_true: files('host-stub.c'))

meson.build

@@ -992,10 +992,12 @@ if 'CONFIG_USB_REDIR' in config_host
                                 link_args: config_host['USB_REDIR_LIBS'].split())
 endif
 libusb = not_found
-if 'CONFIG_USB_LIBUSB' in config_host
-  libusb = declare_dependency(compile_args: config_host['LIBUSB_CFLAGS'].split(),
-                              link_args: config_host['LIBUSB_LIBS'].split())
+if not get_option('libusb').auto() or have_system
+  libusb = dependency('libusb-1.0', required: get_option('libusb'),
+                      version: '>=1.0.13', method: 'pkg-config',
+                      kwargs: static_kwargs)
 endif
+
 libpmem = not_found
 if 'CONFIG_LIBPMEM' in config_host
   libpmem = declare_dependency(compile_args: config_host['LIBPMEM_CFLAGS'].split(),
@@ -1211,6 +1213,7 @@ config_host_data.set('CONFIG_SDL', sdl.found())
 config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
 config_host_data.set('CONFIG_SECCOMP', seccomp.found())
 config_host_data.set('CONFIG_SNAPPY', snappy.found())
+config_host_data.set('CONFIG_USB_LIBUSB', libusb.found())
 config_host_data.set('CONFIG_VHOST_USER_BLK_SERVER', have_vhost_user_blk_server)
 config_host_data.set('CONFIG_VNC', vnc.found())
 config_host_data.set('CONFIG_VNC_JPEG', jpeg.found())
@@ -2780,7 +2783,7 @@ summary_info += {'rbd support':       rbd.found()}
 summary_info += {'xfsctl support':    config_host.has_key('CONFIG_XFS')}
 summary_info += {'smartcard support': config_host.has_key('CONFIG_SMARTCARD')}
 summary_info += {'U2F support':       u2f.found()}
-summary_info += {'libusb':            config_host.has_key('CONFIG_USB_LIBUSB')}
+summary_info += {'libusb':            libusb.found()}
 summary_info += {'usb net redir':     config_host.has_key('CONFIG_USB_REDIR')}
 summary_info += {'OpenGL support':    config_host.has_key('CONFIG_OPENGL')}
 summary_info += {'GBM':               config_host.has_key('CONFIG_GBM')}

meson_options.txt

@@ -86,6 +86,8 @@ option('gcrypt', type : 'feature', value : 'auto',
        description: 'libgcrypt cryptography support')
 option('libudev', type : 'feature', value : 'auto',
        description: 'Use libudev to enumerate host devices')
+option('libusb', type : 'feature', value : 'auto',
+       description: 'libusb support for USB passthrough')
 option('lzfse', type : 'feature', value : 'auto',
        description: 'lzfse support for DMG images')
 option('lzo', type : 'feature', value : 'auto',