followup for "MDEV-6248 GUI-friendly cmake options to enable/disable plugins"

Remove ONLY_IF clause in MYSQL_ADD_PLUGIN and the requirement
that every plugin's CMakeLists.txt *must* do MYSQL_ADD_PLUGIN
for PLUGIN_XXX=YES to work. This was very fragile and cannot be
relied on.

Use a different implementation of =YES check - iterate all
PLUGIN_* variables and see which one doesn't have a matching target.

Revert all ONLY_IF changes in CMakeLists.txt files.

cmake/plugin.cmake

@@ -29,7 +29,7 @@ INCLUDE(${MYSQL_CMAKE_SCRIPT_DIR}/cmake_parse_arguments.cmake)
 
 MACRO(MYSQL_ADD_PLUGIN)
   MYSQL_PARSE_ARGUMENTS(ARG
-    "LINK_LIBRARIES;DEPENDENCIES;MODULE_OUTPUT_NAME;STATIC_OUTPUT_NAME;COMPONENT;CONFIG;ONLY_IF"
+    "LINK_LIBRARIES;DEPENDENCIES;MODULE_OUTPUT_NAME;STATIC_OUTPUT_NAME;COMPONENT;CONFIG"
     "STORAGE_ENGINE;STATIC_ONLY;MODULE_ONLY;MANDATORY;DEFAULT;DISABLED;RECOMPILE_FOR_EMBEDDED"
     ${ARGN}
   )
@@ -118,10 +118,6 @@ MACRO(MYSQL_ADD_PLUGIN)
     ENDIF()
   ENDIF()
 
-  IF(ARG_ONLY_IF AND NOT ${ARG_ONLY_IF})
-    SET(ARG_DISABLED 1)
-  ENDIF()
-
   # Build either static library or module
   IF (PLUGIN_${plugin} MATCHES "(STATIC|AUTO|YES)" AND NOT ARG_MODULE_ONLY
       AND NOT ARG_DISABLED)
@@ -229,8 +225,6 @@ MACRO(MYSQL_ADD_PLUGIN)
     ENDIF()
     MYSQL_INSTALL_TARGETS(${target} DESTINATION ${INSTALL_PLUGINDIR} COMPONENT ${ARG_COMPONENT})
     #INSTALL_DEBUG_TARGET(${target} DESTINATION ${INSTALL_PLUGINDIR}/debug COMPONENT ${ARG_COMPONENT})
-  ELSEIF(PLUGIN_${plugin} MATCHES "YES")
-    MESSAGE(FATAL_ERROR "Plugin ${plugin} cannot be built")
   ENDIF()
 
   GET_FILENAME_COMPONENT(subpath ${CMAKE_CURRENT_SOURCE_DIR} NAME)
@@ -251,4 +245,15 @@ MACRO(CONFIGURE_PLUGINS)
       ADD_SUBDIRECTORY(${dir})
     ENDIF()
   ENDFOREACH()
+
+  GET_CMAKE_PROPERTY(ALL_VARS VARIABLES)
+  FOREACH (V ${ALL_VARS})
+    IF (V MATCHES "^PLUGIN_" AND ${V} MATCHES "YES")
+      STRING(SUBSTRING ${V} 7 -1 plugin)
+      STRING(TOLOWER ${plugin} target)
+      IF (NOT TARGET ${target})
+        MESSAGE(FATAL_ERROR "Plugin ${plugin} cannot be built")
+      ENDIF()
+    ENDIF()
+  ENDFOREACH()
 ENDMACRO()

plugin/auth_pam/CMakeLists.txt

@@ -4,10 +4,10 @@ INCLUDE (CheckFunctionExists)
 CHECK_INCLUDE_FILES (security/pam_appl.h HAVE_PAM_APPL_H)
 CHECK_FUNCTION_EXISTS (strndup HAVE_STRNDUP)
 
-IF(HAVE_STRNDUP)
+IF(HAVE_PAM_APPL_H)
+  IF(HAVE_STRNDUP)
     ADD_DEFINITIONS(-DHAVE_STRNDUP)
-ENDIF(HAVE_STRNDUP)
-
-MYSQL_ADD_PLUGIN(auth_pam auth_pam.c ONLY_IF HAVE_PAM_APPL_H
-                 LINK_LIBRARIES pam MODULE_ONLY)
+  ENDIF(HAVE_STRNDUP)
+  MYSQL_ADD_PLUGIN(auth_pam auth_pam.c LINK_LIBRARIES pam MODULE_ONLY)
+ENDIF(HAVE_PAM_APPL_H)
 

plugin/auth_socket/CMakeLists.txt

@@ -64,5 +64,6 @@ ENDIF()
 ENDIF()
 ENDIF()
 
-MYSQL_ADD_PLUGIN(auth_socket auth_socket.c ONLY_IF ok MODULE_ONLY)
-
+IF(ok)
+  MYSQL_ADD_PLUGIN(auth_socket auth_socket.c MODULE_ONLY)
+ENDIF()

plugin/cracklib_password_check/CMakeLists.txt

@@ -3,9 +3,8 @@ INCLUDE (CheckLibraryExists)
 
 CHECK_INCLUDE_FILES (crack.h HAVE_CRACK_H)
 CHECK_LIBRARY_EXISTS(crack FascistCheckUser "" HAVE_LIBCRACK)
+
 IF (HAVE_ALLOCA_H AND HAVE_CRACK_H AND HAVE_LIBCRACK AND HAVE_MEMCPY)
-  SET(ok 1)
+  MYSQL_ADD_PLUGIN(cracklib_password_check cracklib_password_check.c
+                   LINK_LIBRARIES crack MODULE_ONLY)
 ENDIF()
-
-MYSQL_ADD_PLUGIN(cracklib_password_check cracklib_password_check.c
-  LINK_LIBRARIES crack ONLY_IF ok MODULE_ONLY)

plugin/example_key_management_plugin/CMakeLists.txt

-MYSQL_ADD_PLUGIN(EXAMPLE_KEY_MANAGEMENT_PLUGIN example_key_management_plugin.cc
-  MODULE_ONLY ONLY_IF HAVE_EncryptAes128Ctr)
+IF(HAVE_EncryptAes128Ctr)
+  MYSQL_ADD_PLUGIN(EXAMPLE_KEY_MANAGEMENT_PLUGIN example_key_management_plugin.cc
+                   MODULE_ONLY)
+ENDIF()

plugin/file_key_management_plugin/CMakeLists.txt

 SET(FILE_KEY_MANAGEMENT_PLUGIN_SOURCES file_key_management_plugin.cc EncKeys.cc KeySingleton.cc)
 
 IF(NOT SSL_SOURCES)
-  SET(USING_OPENSSL ON)
+  MYSQL_ADD_PLUGIN(FILE_KEY_MANAGEMENT_PLUGIN ${FILE_KEY_MANAGEMENT_PLUGIN_SOURCES}
+                   LINK_LIBRARIES pcre)
 ENDIF()
-
-MYSQL_ADD_PLUGIN(FILE_KEY_MANAGEMENT_PLUGIN ${FILE_KEY_MANAGEMENT_PLUGIN_SOURCES}
-  LINK_LIBRARIES pcre ONLY_IF USING_OPENSSL)

storage/cassandra/CMakeLists.txt

@@ -51,9 +51,6 @@ LINK_DIRECTORIES(${LINK_DIR})
 
 IF(CASSANDRASE_OK)
   SET(CASSANDRA_DEB_FILES "usr/lib/mysql/plugin/ha_cassandra.so" PARENT_SCOPE)
-ENDIF(CASSANDRASE_OK)
-
-MYSQL_ADD_PLUGIN(cassandra ${cassandra_sources} STORAGE_ENGINE
-  ONLY_IF CASSANDRASE_OK
+  MYSQL_ADD_PLUGIN(cassandra ${cassandra_sources} STORAGE_ENGINE
     MODULE_ONLY LINK_LIBRARIES thrift COMPONENT cassandra-engine)
-
+ENDIF(CASSANDRASE_OK)

storage/oqgraph/CMakeLists.txt

@@ -50,17 +50,16 @@ IF(BOOST_OK)
 
   ADD_DEFINITIONS(-DBOOST_NO_RTTI=1 -DBOOST_NO_TYPEID=1 -DBOOST_DISABLE_ASSERTS=1)
   MESSAGE(STATUS "OQGraph OK")
-ELSE(BOOST_OK)
-  MESSAGE(STATUS "Requisites for OQGraph not met. OQGraph will not be compiled")
-ENDIF(BOOST_OK)
-ENDFUNCTION()
-
-CHECK_OQGRAPH()
-MYSQL_ADD_PLUGIN(oqgraph ha_oqgraph.cc graphcore.cc graphcore-graph.cc
+  MYSQL_ADD_PLUGIN(oqgraph ha_oqgraph.cc graphcore.cc graphcore-graph.cc
                    oqgraph_shim.cc oqgraph_thunk.cc oqgraph_judy.cc
                    STORAGE_ENGINE
-                 ONLY_IF BOOST_OK
                    MODULE_ONLY
                    RECOMPILE_FOR_EMBEDDED
                    COMPONENT oqgraph-engine
                    LINK_LIBRARIES ${Judy_LIBRARIES})
+ELSE(BOOST_OK)
+  MESSAGE(STATUS "Requisites for OQGraph not met. OQGraph will not be compiled")
+ENDIF(BOOST_OK)
+ENDFUNCTION()
+
+CHECK_OQGRAPH()

storage/tokudb/CMakeLists.txt

@@ -10,7 +10,6 @@ int main() { return 0; }
 ENDIF()
 
 IF(NOT TOKUDB_OK OR PLUGIN_TOKUDB STREQUAL "NO")
-  MYSQL_ADD_PLUGIN(tokudb DISABLED)
   RETURN()
 ENDIF()
 

storage/xtradb/CMakeLists.txt

@@ -458,12 +458,10 @@ SET(INNOBASE_SOURCES
 	ut/ut0wqueue.cc
 	ut/ut0timer.cc)
 
-IF(NOT XTRADB_OK)
+IF(XTRADB_OK)
+  MYSQL_ADD_PLUGIN(xtradb ${INNOBASE_SOURCES} STORAGE_ENGINE
+                   DEFAULT RECOMPILE_FOR_EMBEDDED
+                   LINK_LIBRARIES ${ZLIB_LIBRARY} ${LINKER_SCRIPT})
+ELSE()
   MESSAGE(FATAL_ERROR "Percona XtraDB is not supported on this platform")
 ENDIF()
-
-MYSQL_ADD_PLUGIN(xtradb ${INNOBASE_SOURCES} STORAGE_ENGINE
-  DEFAULT ONLY_IF XTRADB_OK
-  RECOMPILE_FOR_EMBEDDED
-  LINK_LIBRARIES ${ZLIB_LIBRARY} ${LINKER_SCRIPT})
-