cleanup: use predefined CMAKE_DL_LIBS

instead of, say, MY_SEARCH_LIBS(dlopen dl LIBDL)

cmake/jemalloc.cmake

@@ -17,7 +17,7 @@ MACRO (CHECK_JEMALLOC)
 
     IF(WITH_JEMALLOC STREQUAL "static")
       SET(libname jemalloc_pic)
-      SET(CMAKE_REQUIRED_LIBRARIES pthread dl m)
+      SET(CMAKE_REQUIRED_LIBRARIES pthread ${CMAKE_DL_LIBS} m)
       SET(what bundled)
     ELSE()
       SET(libname jemalloc c)

cmake/ssl.cmake

@@ -135,7 +135,7 @@ MACRO (MYSQL_CHECK_SSL)
         SET(SSL_LIBRARIES ${SSL_LIBRARIES} ${LIBSOCKET})
       ENDIF()
       IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
-        SET(SSL_LIBRARIES ${SSL_LIBRARIES} ${LIBDL})
+        SET(SSL_LIBRARIES ${SSL_LIBRARIES} ${CMAKE_DL_LIBS})
       ENDIF()
 
       MESSAGE_ONCE(OPENSSL_INCLUDE_DIR "OPENSSL_INCLUDE_DIR = ${OPENSSL_INCLUDE_DIR}")

configure.cmake

@@ -130,7 +130,6 @@ IF(UNIX)
   MY_SEARCH_LIBS(bind "bind;socket" LIBBIND)
   MY_SEARCH_LIBS(crypt crypt LIBCRYPT)
   MY_SEARCH_LIBS(setsockopt socket LIBSOCKET)
-  MY_SEARCH_LIBS(dlopen dl LIBDL)
   MY_SEARCH_LIBS(sched_yield rt LIBRT)
   IF(NOT LIBRT)
     MY_SEARCH_LIBS(clock_gettime rt LIBRT)
@@ -138,7 +137,7 @@ IF(UNIX)
   FIND_PACKAGE(Threads)
 
   SET(CMAKE_REQUIRED_LIBRARIES 
-    ${LIBM} ${LIBNSL} ${LIBBIND} ${LIBCRYPT} ${LIBSOCKET} ${LIBDL} ${CMAKE_THREAD_LIBS_INIT} ${LIBRT} ${LIBEXECINFO})
+    ${LIBM} ${LIBNSL} ${LIBBIND} ${LIBCRYPT} ${LIBSOCKET} ${CMAKE_DL_LIBS} ${CMAKE_THREAD_LIBS_INIT} ${LIBRT} ${LIBEXECINFO})
   # Need explicit pthread for gcc -fsanitize=address
   IF(CMAKE_USE_PTHREADS_INIT AND CMAKE_C_FLAGS MATCHES "-fsanitize=")
     SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} pthread)

libmysqld/CMakeLists.txt

@@ -148,7 +148,7 @@ ENDIF()
 SET(LIBS 
   dbug strings mysys mysys_ssl pcre vio 
   ${ZLIB_LIBRARY} ${SSL_LIBRARIES} 
-  ${LIBWRAP} ${LIBCRYPT} ${LIBDL}
+  ${LIBWRAP} ${LIBCRYPT} ${CMAKE_DL_LIBS}
   ${MYSQLD_STATIC_PLUGIN_LIBS}
   sql_embedded
 )

mysql-test/lib/My/SafeProcess/CMakeLists.txt

@@ -24,7 +24,7 @@ ENDIF()
 
 IF(WITH_WSREP)
   ADD_EXECUTABLE(wsrep_check_version wsrep_check_version.c)
-  TARGET_LINK_LIBRARIES(wsrep_check_version ${LIBDL})
+  TARGET_LINK_LIBRARIES(wsrep_check_version ${CMAKE_DL_LIBS})
 ENDIF()
 
 IF(NOT INSTALL_MYSQLTESTDIR)

mysys/CMakeLists.txt

@@ -75,7 +75,7 @@ ENDIF()
 
 ADD_CONVENIENCE_LIBRARY(mysys ${MYSYS_SOURCES})
 TARGET_LINK_LIBRARIES(mysys dbug strings ${ZLIB_LIBRARY}
- ${LIBNSL} ${LIBM} ${LIBRT} ${LIBDL} ${LIBSOCKET} ${LIBEXECINFO} ${CRC32_LIBRARY})
+ ${LIBNSL} ${LIBM} ${LIBRT} ${CMAKE_DL_LIBS} ${LIBSOCKET} ${LIBEXECINFO} ${CRC32_LIBRARY})
 DTRACE_INSTRUMENT(mysys)
 
 IF(HAVE_BFD_H)

sql/CMakeLists.txt

@@ -167,7 +167,7 @@ ADD_LIBRARY(sql STATIC ${SQL_SOURCE})
 DTRACE_INSTRUMENT(sql)
 TARGET_LINK_LIBRARIES(sql ${MYSQLD_STATIC_PLUGIN_LIBS} 
   mysys mysys_ssl dbug strings vio pcre
-  ${LIBWRAP} ${LIBCRYPT} ${LIBDL} ${CMAKE_THREAD_LIBS_INIT}
+  ${LIBWRAP} ${LIBCRYPT} ${CMAKE_DL_LIBS} ${CMAKE_THREAD_LIBS_INIT}
   ${WSREP_LIB}
   ${SSL_LIBRARIES}
   ${LIBSYSTEMD})

storage/mroonga/vendor/groonga/CMakeLists.txt

@@ -240,7 +240,6 @@ include(build/ac_macros/check_functions.m4)
 ac_check_symbols(fpclassify math.h)
 ac_check_lib(m fpclassify)
 
-ac_check_lib(dl dlopen)
 ac_check_lib(execinfo backtrace)
 if(HAVE_LIBEXECINFO)
   set(HAVE_BACKTRACE TRUE)

storage/mroonga/vendor/groonga/lib/CMakeLists.txt

@@ -97,7 +97,7 @@ set(GRN_ALL_LIBRARIES
     ${LZ4_LIBS}
     ${LIBZSTD_LIBS}
     ${MESSAGE_PACK_LIBS}
-    ${DL_LIBS}
+    ${CMAKE_DL_LIBS}
     ${M_LIBS}
     ${WS2_32_LIBS}
     ${MRUBY_LIBS}

storage/rocksdb/build_rocksdb.cmake

@@ -160,7 +160,7 @@ find_package(Threads REQUIRED)
 if(WIN32)
   set(SYSTEM_LIBS ${SYSTEM_LIBS} Shlwapi.lib Rpcrt4.lib)
 else()
-  set(SYSTEM_LIBS ${CMAKE_THREAD_LIBS_INIT} ${LIBRT} ${LIBDL})
+  set(SYSTEM_LIBS ${CMAKE_THREAD_LIBS_INIT} ${LIBRT} ${CMAKE_DL_LIBS})
 endif()
 
 set(ROCKSDB_LIBS rocksdblib})

wsrep/CMakeLists.txt

@@ -23,4 +23,4 @@ ADD_CONVENIENCE_LIBRARY(wsrep ${WSREP_SOURCES})
 DTRACE_INSTRUMENT(wsrep)
 
 #ADD_EXECUTABLE(listener wsrep_listener.c ${WSREP_SOURCES})
-#TARGET_LINK_LIBRARIES(listener ${LIBDL})
+#TARGET_LINK_LIBRARIES(listener ${CMAKE_DL_LIBS})