[PATCH v3 4/4] meson: Link with libinotify on FreeBSD

[Ilya Leoshkevich <iii@linux.ibm.com>]

make vm-build-freebsd fails with:

    ld: error: undefined symbol: inotify_init1
    >>> referenced by filemonitor-inotify.c:183 (../src/util/filemonitor-inotify.c:183)
    >>>               util_filemonitor-inotify.c.o:(qemu_file_monitor_new) in archive libqemuutil.a

On FreeBSD the inotify functions are defined in libinotify.so. Add it
to the dependencies.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 meson.build      | 23 +++++++++++++++++++----
 util/meson.build |  6 +++++-
 2 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/meson.build b/meson.build
index b5d6dc94a83..e5d6f2d057e 100644
--- a/meson.build
+++ b/meson.build
@@ -2367,60 +2367,72 @@ if rbd.found()
 endif
 if rdma.found()
   config_host_data.set('HAVE_IBV_ADVISE_MR',
                        cc.has_function('ibv_advise_mr',
                                        dependencies: rdma,
                                        prefix: '#include <infiniband/verbs.h>'))
 endif
 
 have_asan_fiber = false
 if get_option('sanitizers') and \
    not cc.has_function('__sanitizer_start_switch_fiber',
                          args: '-fsanitize=address',
                          prefix: '#include <sanitizer/asan_interface.h>')
   warning('Missing ASAN due to missing fiber annotation interface')
   warning('Without code annotation, the report may be inferior.')
 else
   have_asan_fiber = true
 endif
 config_host_data.set('CONFIG_ASAN_IFACE_FIBER', have_asan_fiber)
 
+have_inotify_init = cc.has_header_symbol('sys/inotify.h', 'inotify_init')
+have_inotify_init1 = cc.has_header_symbol('sys/inotify.h', 'inotify_init1')
+inotify = not_found
+if (have_inotify_init or have_inotify_init1) and host_os == 'freebsd'
+  # libinotify-kqueue
+  inotify = cc.find_library('inotify')
+  if have_inotify_init
+    have_inotify_init = inotify.found()
+  endif
+  if have_inotify_init1
+    have_inotify_init1 = inotify.found()
+  endif
+endif
+config_host_data.set('CONFIG_INOTIFY', have_inotify_init)
+config_host_data.set('CONFIG_INOTIFY1', have_inotify_init1)
+
 # has_header_symbol
 config_host_data.set('CONFIG_BLKZONED',
                      cc.has_header_symbol('linux/blkzoned.h', 'BLKOPENZONE'))
 config_host_data.set('CONFIG_EPOLL_CREATE1',
                      cc.has_header_symbol('sys/epoll.h', 'epoll_create1'))
 config_host_data.set('CONFIG_FALLOCATE_PUNCH_HOLE',
                      cc.has_header_symbol('linux/falloc.h', 'FALLOC_FL_PUNCH_HOLE') and
                      cc.has_header_symbol('linux/falloc.h', 'FALLOC_FL_KEEP_SIZE'))
 config_host_data.set('CONFIG_FALLOCATE_ZERO_RANGE',
                      cc.has_header_symbol('linux/falloc.h', 'FALLOC_FL_ZERO_RANGE'))
 config_host_data.set('CONFIG_FIEMAP',
                      cc.has_header('linux/fiemap.h') and
                      cc.has_header_symbol('linux/fs.h', 'FS_IOC_FIEMAP'))
 config_host_data.set('CONFIG_GETRANDOM',
                      cc.has_function('getrandom') and
                      cc.has_header_symbol('sys/random.h', 'GRND_NONBLOCK'))
-config_host_data.set('CONFIG_INOTIFY',
-                     cc.has_header_symbol('sys/inotify.h', 'inotify_init'))
-config_host_data.set('CONFIG_INOTIFY1',
-                     cc.has_header_symbol('sys/inotify.h', 'inotify_init1'))
 config_host_data.set('CONFIG_PRCTL_PR_SET_TIMERSLACK',
                      cc.has_header_symbol('sys/prctl.h', 'PR_SET_TIMERSLACK'))
 config_host_data.set('CONFIG_RTNETLINK',
                      cc.has_header_symbol('linux/rtnetlink.h', 'IFLA_PROTO_DOWN'))
 config_host_data.set('CONFIG_SYSMACROS',
                      cc.has_header_symbol('sys/sysmacros.h', 'makedev'))
 config_host_data.set('HAVE_OPTRESET',
                      cc.has_header_symbol('getopt.h', 'optreset'))
 config_host_data.set('HAVE_IPPROTO_MPTCP',
                      cc.has_header_symbol('netinet/in.h', 'IPPROTO_MPTCP'))
 
 # has_member
 config_host_data.set('HAVE_SIGEV_NOTIFY_THREAD_ID',
                      cc.has_member('struct sigevent', 'sigev_notify_thread_id',
                                    prefix: '#include <signal.h>'))
 config_host_data.set('HAVE_STRUCT_STAT_ST_ATIM',
                      cc.has_member('struct stat', 'st_atim',
                                    prefix: '#include <sys/stat.h>'))
 config_host_data.set('HAVE_BLK_ZONE_REP_CAPACITY',
                      cc.has_member('struct blk_zone', 'capacity',
@@ -4390,40 +4402,43 @@ if host_os == 'windows'
 endif
 summary_info += {'seccomp support':   seccomp}
 summary_info += {'GlusterFS support': glusterfs}
 summary_info += {'hv-balloon support': hv_balloon}
 summary_info += {'TPM support':       have_tpm}
 summary_info += {'libssh support':    libssh}
 summary_info += {'lzo support':       lzo}
 summary_info += {'snappy support':    snappy}
 summary_info += {'bzip2 support':     libbzip2}
 summary_info += {'lzfse support':     liblzfse}
 summary_info += {'zstd support':      zstd}
 summary_info += {'NUMA host support': numa}
 summary_info += {'capstone':          capstone}
 summary_info += {'libpmem support':   libpmem}
 summary_info += {'libdaxctl support': libdaxctl}
 summary_info += {'libudev':           libudev}
 # Dummy dependency, keep .found()
 summary_info += {'FUSE lseek':        fuse_lseek.found()}
 summary_info += {'selinux':           selinux}
 summary_info += {'libdw':             libdw}
+if host_os == 'freebsd'
+  summary_info += {'libinotify-kqueue': inotify}
+endif
 summary(summary_info, bool_yn: true, section: 'Dependencies')
 
 if host_arch == 'unknown'
   message()
   warning('UNSUPPORTED HOST CPU')
   message()
   message('Support for CPU host architecture ' + cpu + ' is not currently')
   message('maintained. The QEMU project does not guarantee that QEMU will')
   message('compile or work on this host CPU. You can help by volunteering')
   message('to maintain it and providing a build host for our continuous')
   message('integration setup.')
   if get_option('tcg').allowed() and target_dirs.length() > 0
     message()
     message('configure has succeeded and you can continue to build, but')
     message('QEMU will use a slow interpreter to emulate the target CPU.')
   endif
 endif
 
 if not supported_oses.contains(host_os)
   message()
diff --git a/util/meson.build b/util/meson.build
index af3bf5692d8..0ef9886be04 100644
--- a/util/meson.build
+++ b/util/meson.build
@@ -87,40 +87,44 @@ if have_block or have_ga
   util_ss.add(files('thread-pool.c', 'qemu-timer.c'))
   util_ss.add(files('qemu-sockets.c'))
 endif
 if have_block
   util_ss.add(files('aio-wait.c'))
   util_ss.add(files('buffer.c'))
   util_ss.add(files('bufferiszero.c'))
   util_ss.add(files('hbitmap.c'))
   util_ss.add(files('hexdump.c'))
   util_ss.add(files('iova-tree.c'))
   util_ss.add(files('iov.c', 'uri.c'))
   util_ss.add(files('nvdimm-utils.c'))
   util_ss.add(files('block-helpers.c'))
   util_ss.add(files('qemu-coroutine-sleep.c'))
   util_ss.add(files('qemu-co-shared-resource.c'))
   util_ss.add(files('qemu-co-timeout.c'))
   util_ss.add(files('readline.c'))
   util_ss.add(files('throttle.c'))
   util_ss.add(files('timed-average.c'))
   if config_host_data.get('CONFIG_INOTIFY1')
-    util_ss.add(files('filemonitor-inotify.c'))
+    freebsd_dep = []
+    if host_os == 'freebsd'
+      freebsd_dep = inotify
+    endif
+    util_ss.add(files('filemonitor-inotify.c'), freebsd_dep)
   else
     util_ss.add(files('filemonitor-stub.c'))
   endif
   if host_os == 'linux'
     util_ss.add(files('vhost-user-server.c'), vhost_user)
     util_ss.add(files('vfio-helpers.c'))
     util_ss.add(files('chardev_open.c'))
   endif
 endif
 
 if cpu == 'aarch64'
   util_ss.add(files('cpuinfo-aarch64.c'))
 elif cpu in ['x86', 'x86_64']
   util_ss.add(files('cpuinfo-i386.c'))
 elif cpu == 'loongarch64'
   util_ss.add(files('cpuinfo-loongarch.c'))
 elif cpu in ['ppc', 'ppc64']
   util_ss.add(files('cpuinfo-ppc.c'))
 endif
-- 
2.43.0