kou commented on a change in pull request #7388:
URL: https://github.com/apache/arrow/pull/7388#discussion_r438438723



##########
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:
       Conda on Windows failed: 
https://ci.appveyor.com/project/ApacheSoftwareFoundation/arrow/builds/33446250/job/5pyasx9g6mscq7hm
   
   ```text
   -- Using ZSTD_ROOT: C:\Miniconda37-x64\envs\arrow/Library
   CMake Error at 
C:/Miniconda37-x64/envs/arrow/Library/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:164
 (message):
     Could NOT find ZSTD (missing: ZSTD_LIB)
   Call Stack (most recent call first):
     
C:/Miniconda37-x64/envs/arrow/Library/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:445
 (_FPHSA_FAILURE_MESSAGE)
     cmake_modules/FindZSTD.cmake:62 (find_package_handle_standard_args)
     cmake_modules/ThirdpartyToolchain.cmake:156 (find_package)
     cmake_modules/ThirdpartyToolchain.cmake:1887 (resolve_dependency)
     CMakeLists.txt:463 (include)
   ```
   
   Files in win-64/zstd-1.4.4-h9f78265_3.tar.bz2 at 
https://anaconda.org/conda-forge/zstd/files :
   
   ```text
   zstd-1.4.4-h9f78265_3
   |-- Library
   |   |-- bin
   |   |   |-- libzstd.dll
   |   |   |-- zstd.dll
   |   |   `-- zstd.exe
   |   |-- include
   |   |   |-- cover.h
   |   |   |-- zbuff.h
   |   |   |-- zdict.h
   |   |   |-- zstd.h
   |   |   `-- zstd_errors.h
   |   `-- lib
   |       |-- libzstd.lib
   |       |-- libzstd_static.lib
   |       |-- zstd.lib
   |       `-- zstd_static.lib
   `-- info
       |-- about.json
       |-- files
       |-- git
       |-- hash_input.json
       |-- index.json
       |-- licenses
       |   `-- LICENSE
       |-- paths.json
       |-- recipe
       |   |-- bld.bat
       |   |-- build.sh
       |   |-- conda_build_config.yaml
       |   |-- meta.yaml
       |   `-- meta.yaml.template
       |-- run_exports.json
       `-- test
           `-- run_test.bat
   ```
   




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