diff --git a/clang/tools/libclang/CMakeLists.txt b/clang/tools/libclang/CMakeLists.txt
index ac7a9a8db37c0..852c9d10ccedd 100644
--- a/clang/tools/libclang/CMakeLists.txt
+++ b/clang/tools/libclang/CMakeLists.txt
@@ -157,15 +157,22 @@ if(ENABLE_STATIC)
 endif()
 
 if(ENABLE_SHARED)
-  if(WIN32)
+  if(WIN32 OR CYGWIN)
     set_target_properties(libclang
       PROPERTIES
       VERSION ${LIBCLANG_LIBRARY_VERSION}
       DEFINE_SYMBOL _CINDEX_LIB_)
-      # Avoid declaring clang c++ symbols that are statically linked into libclang as dllimport'ed.
-      # If llvm/libclang-cpp dll is also being built for windows clang c++ symbols will still be
-      # implicitly be exported from libclang.
-      target_compile_definitions(libclang PRIVATE CLANG_BUILD_STATIC)
+    if (CYGWIN)
+      # We need cygclang.dll in build-tree additional to installed-tree for testsuite of python bindings.
+      set(plain_name "$<TARGET_FILE_DIR:libclang>/$<TARGET_FILE_PREFIX:libclang>clang$<TARGET_FILE_SUFFIX:libclang>")
+      add_custom_command(TARGET libclang POST_BUILD
+                         COMMAND ${CMAKE_COMMAND} -E create_symlink "$<TARGET_FILE_NAME:libclang>" "${plain_name}")
+      install(FILES "${plain_name}" DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT libclang)
+    endif()
+    # Avoid declaring clang c++ symbols that are statically linked into libclang as dllimport'ed.
+    # If llvm/libclang-cpp dll is also being built for windows clang c++ symbols will still be
+    # implicitly be exported from libclang.
+    target_compile_definitions(libclang PRIVATE CLANG_BUILD_STATIC)
   elseif(APPLE)
     set(LIBCLANG_LINK_FLAGS " -Wl,-compatibility_version -Wl,1")
     set(LIBCLANG_LINK_FLAGS "${LIBCLANG_LINK_FLAGS} -Wl,-current_version -Wl,${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}")
diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index 83772ed8d2b13..60ec7ea178e66 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -750,12 +750,20 @@ function(llvm_add_library name)
       set(library_name ${output_name}-${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX})
       set(api_name ${output_name}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}${LLVM_VERSION_SUFFIX})
       set_target_properties(${name} PROPERTIES OUTPUT_NAME ${library_name})
-      if(UNIX AND NOT CYGWIN)
+      if(UNIX)
         llvm_install_library_symlink(${api_name} ${library_name} SHARED
           COMPONENT ${name})
         llvm_install_library_symlink(${output_name} ${library_name} SHARED
           COMPONENT ${name})
       endif()
+    elseif(CYGWIN)
+      get_target_property(output_name ${name} OUTPUT_NAME)
+      if(${output_name} STREQUAL "output_name-NOTFOUND")
+        set(output_name ${name})
+      endif()
+      set(library_name ${output_name}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}${LLVM_VERSION_SUFFIX})
+      llvm_install_library_symlink(${output_name} ${library_name} SHARED
+        COMPONENT ${name})
     endif()
   endif()
 
diff --git a/llvm/tools/llvm-shlib/CMakeLists.txt b/llvm/tools/llvm-shlib/CMakeLists.txt
index 9a2015f61f2bf..14a0957f67138 100644
--- a/llvm/tools/llvm-shlib/CMakeLists.txt
+++ b/llvm/tools/llvm-shlib/CMakeLists.txt
@@ -33,8 +33,12 @@ if(LLVM_BUILD_LLVM_DYLIB)
   if (LLVM_LINK_LLVM_DYLIB)
     set(INSTALL_WITH_TOOLCHAIN INSTALL_WITH_TOOLCHAIN)
   endif()
-  if (WIN32 OR CYGWIN)
+  if (WIN32)
     add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB SONAME ${INSTALL_WITH_TOOLCHAIN} ${SOURCES})
+  elseif(CYGWIN)
+    add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB SONAME ${INSTALL_WITH_TOOLCHAIN} ${SOURCES})
+    llvm_install_library_symlink(LLVM-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}${LLVM_VERSION_SUFFIX} $<TARGET_FILE_NAME:LLVM> SHARED FULL_DEST COMPONENT LLVM)
+    llvm_install_library_symlink(LLVM $<TARGET_LINKER_FILE_NAME:LLVM> IMPORT FULL_DEST COMPONENT LLVM)
   else()
     add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB OUTPUT_NAME LLVM ${INSTALL_WITH_TOOLCHAIN} ${SOURCES})
     # Add symlink for backwards compatibility with old library name