no package 'sigc++-2.0' found with cmake, vcpkg and pkg-config on windows 10 - cmake

Question

I am trying to build synfig project with cmake, vcpkg and pkg-config on windows 10 with below commands:
d:\gtkmm\vs>cmake -DCMAKE_TOOLCHAIN_FILE=C:\src\vcpkg\scripts\buildsystems\vcpkg.cmake ..\synfig\
and with errors:
-- Building for: Visual Studio 15 2017
CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
Compatibility with CMake < 2.8.12 will be removed from a future version of
CMake.
Update the VERSION argument <min> value or use a ...<max> suffix to tell
CMake that the project does not need compatibility with older versions.
-- Selecting Windows SDK version 10.0.17763.0 to target Windows 10.0.18363.
-- The C compiler identification is MSVC 19.16.27043.0
-- The CXX compiler identification is MSVC 19.16.27043.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x86/cl.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/VC/Tools/MSVC/14.16.27023/bin/Hostx86/x86/cl.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- CMAKE_BUILD_TYPE: Debug
-- Found Git: C:/Program Files/Git/bin/git.exe (found version "2.27.0.windows.1")
CMake Deprecation Warning at ETL/CMakeLists.txt:1 (cmake_minimum_required):
Compatibility with CMake < 2.8.12 will be removed from a future version of
CMake.
Update the VERSION argument <min> value or use a ...<max> suffix to tell
CMake that the project does not need compatibility with older versions.
-- Looking for pthread.h
-- Looking for pthread.h - not found
-- Found Threads: TRUE
-- Found Boost: C:/src/vcpkg/installed/x86-windows/include (found version "1.73.0") found components: system
-- Found ZLIB: optimized;C:/src/vcpkg/installed/x86-windows/lib/zlib.lib;debug;C:/src/vcpkg/installed/x86-windows/debug/lib/zlibd.lib (found version "1.2.11")
-- Found PkgConfig: C:/pkgconfig/pkg-config.exe (found version "0.26")
-- Checking for module 'sigc++-2.0'
-- No package 'sigc++-2.0' found
CMake Error at C:/Program Files (x86)/CMake/share/cmake-3.19/Modules/FindPkgConfig.cmake:553 (message):
A required package was not found
Call Stack (most recent call first):
C:/Program Files (x86)/CMake/share/cmake-3.19/Modules/FindPkgConfig.cmake:741 (_pkg_check_modules_internal)
synfig-core/src/CMakeLists.txt:27 (pkg_check_modules)
-- Configuring incomplete, errors occurred!
See also "D:/gtkmm/vs/CMakeFiles/CMakeOutput.log".
See also "D:/gtkmm/vs/CMakeFiles/CMakeError.log".
My vcpkg is placed in c:\src\vcpkg
CMkake is installed in C:/Program Files (x86)/CMake/
and downloaded pkg-config files in C:\pkgconfig according to here
I think the pkg-config don't know the place the sigc++ installed with vcpkg, because when I check the libsigcpp with command:
vcpkg install libsigcpp
it tells:
Computing installation plan...
The following packages are already installed:
libsigcpp[core]:x86-windows
Package libsigcpp:x86-windows is already installed
Can anyone help, thank you in advance.