cmake build error on freebsd 15.0

`root@freebsd:/usr/local/src/shadowsocks-libev/build # cmake .. CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required): Compatibility with CMake < 3.10 will be removed from a future version of CMake.

Update the VERSION argument value. Or, use the ... syntax to tell CMake that the project requires at least but has been updated to work with policies introduced by or earlier.

-- Running cmake version 3.31.10 CMake Warning (dev) at /usr/local/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:441 (message): The package name passed to find_package_handle_standard_args (PkgConfig) does not match the name of the calling package (PCRE2). This can lead to problems in calling code that expects find_package result variables (e.g., _FOUND) to follow a certain pattern. Call Stack (most recent call first): /usr/local/share/cmake/Modules/FindPkgConfig.cmake:114 (find_package_handle_standard_args) cmake/FindPCRE2.cmake:8 (include) CMakeLists.txt:50 (find_package) This warning is for project developers. Use -Wno-dev to suppress it.

-- Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE) -- Found PCRE2: -L/usr/local/lib -Wl,-R/usr/local/lib -lpcre2-8 -- Found mbedTLS: /usr/local/lib/libmbedcrypto.so -- Found libsodium: /usr/local/lib/libsodium.so CMake Warning at cmake/FindCares.cmake:37 (message): c-ares found but ares_library_init not detected. Proceeding anyway. Call Stack (most recent call first): CMakeLists.txt:53 (find_package)

-- Found c-ares: /usr/local/lib/libcares.so -- Stack protector enabled -- Configuring done (0.1s) CMake Error: The following variables are used in this project, but they are set to NOTFOUND. Please set them or make sure they are set and tested correctly in the CMake files: LIBEV linked by target "shadowsocks-libev" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-local" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-redir" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-manager" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-tunnel" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-server" in directory /usr/local/src/shadowsocks-libev/src LIBEV_SHARED linked by target "ss-local-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-redir-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-tunnel-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-server-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "shadowsocks-libev-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "shadowsocks-libev-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-manager-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-manager-shared" in directory /usr/local/src/shadowsocks-libev/src linked by target "test_buffer" in directory /usr/local/src/shadowsocks-libev/tests linked by target "test_crypto" in directory /usr/local/src/shadowsocks-libev/tests linked by target "test_jconf" in directory /usr/local/src/shadowsocks-libev/tests linked by target "test_cache" in directory /usr/local/src/shadowsocks-libev/tests linked by target "test_netutils" in directory /usr/local/src/shadowsocks-libev/tests LIBUDNS linked by target "shadowsocks-libev" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-local" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-redir" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-manager" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-tunnel" in directory /usr/local/src/shadowsocks-libev/src linked by target "ss-server" in directory /usr/local/src/shadowsocks-libev/src

-- Generating done (0.2s) CMake Generate step failed. Build files cannot be regenerated correctly. root@freebsd:/usr/local/src/shadowsocks-libev/build # root@freebsd:/usr/local/src/shadowsocks-libev/build # cat /etc/os-release NAME=FreeBSD VERSION="15.0-RELEASE" VERSION_ID="15.0" ID=freebsd ANSI_COLOR="0;31" PRETTY_NAME="FreeBSD 15.0-RELEASE" CPE_NAME="cpe:/o:freebsd:freebsd:15.0" HOME_URL="https://FreeBSD.org/" BUG_REPORT_URL="https://bugs.FreeBSD.org/" root@freebsd:/usr/local/src/shadowsocks-libev/build #`