kou commented on a change in pull request #7388:
URL: https://github.com/apache/arrow/pull/7388#discussion_r438470424



##########
File path: cpp/cmake_modules/FindZSTD.cmake
##########
@@ -21,13 +21,17 @@ endif()
 
 set(ZSTD_STATIC_LIB_SUFFIX 
"${ZSTD_MSVC_STATIC_LIB_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}")
 set(ZSTD_STATIC_LIB_NAME 
${CMAKE_STATIC_LIBRARY_PREFIX}zstd${ZSTD_STATIC_LIB_SUFFIX})
+if(ARROW_ZSTD_USE_SHARED)
+  set(ZSTD_LIB_NAMES 
"${CMAKE_SHARED_LIBRARY_PREFIX}zstd${CMAKE_SHARED_LIBRARY_SUFFIX}")
+else()
+  set(ZSTD_LIB_NAMES "${ZSTD_STATIC_LIB_NAME}" "lib${ZSTD_STATIC_LIB_NAME}")
+endif()
 
 # First, find via if specified ZTD_ROOT
 if(ZSTD_ROOT)
   message(STATUS "Using ZSTD_ROOT: ${ZSTD_ROOT}")
   find_library(ZSTD_LIB
-               NAMES zstd "${ZSTD_STATIC_LIB_NAME}" 
"lib${ZSTD_STATIC_LIB_NAME}"
-                     
"${CMAKE_SHARED_LIBRARY_PREFIX}zstd${CMAKE_SHARED_LIBRARY_SUFFIX}"
+               NAMES ${ZSTD_LIB_NAMES}

Review comment:
       `CMAKE_FIND_DEBUG_MODE` will help us:
   
   ```diff
   diff --git a/ci/appveyor-cpp-build.bat b/ci/appveyor-cpp-build.bat
   index a2ce07656..246029928 100644
   --- a/ci/appveyor-cpp-build.bat
   +++ b/ci/appveyor-cpp-build.bat
   @@ -45,6 +45,7 @@ if "%JOB%" == "Build_Debug" (
            -DARROW_USE_PRECOMPILED_HEADERS=OFF ^
            -DARROW_VERBOSE_THIRDPARTY_BUILD=OFF ^
            -DCMAKE_BUILD_TYPE="Debug" ^
   +        -DCMAKE_FIND_DEBUG_MODE=ON ^
            -DCMAKE_UNITY_BUILD=ON ^
            .. || exit /B
   
   ```




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