dependencies for VS

item_cmpfunc.h includes pcre2.h, so with the bundled pcre2
it has to be built before anything that includes pcre2.h .
And item_cmpfunc.h is indirectly included everywhere,
also in many plugins.

Somehow Ninja and Makefiles generators can still deduce the
correct build dependencies, but Visual Studio generator cannot.

Two changes:
* move pcre2.h from item_cmpfunc.h to item_cmpfunc.cc
* create an explicit dependency on pcre2 for the server

sql/CMakeLists.txt

@@ -198,6 +198,10 @@ TARGET_LINK_LIBRARIES(sql
   ${SSL_LIBRARIES}
   ${LIBSYSTEMD})
 
+IF(TARGET pcre2)
+  ADD_DEPENDENCIES(sql pcre2)
+ENDIF()
+
 FOREACH(se aria partition perfschema sql_sequence wsrep)
   # These engines are used directly in sql sources.
   IF(TARGET ${se})

sql/item_cmpfunc.cc

@@ -33,6 +33,8 @@
 #include "sql_parse.h"                          // check_stack_overrun
 #include "sql_base.h"                  // dynamic_column_error_message
 
+#define PCRE2_STATIC 1             /* Important on Windows */
+#include "pcre2.h"                 /* pcre2 header file */
 
 /*
   Compare row signature of two expressions
@@ -5827,6 +5829,28 @@ int Regexp_processor_pcre::default_regex_flags()
   return default_regex_flags_pcre(current_thd);
 }
 
+void Regexp_processor_pcre::cleanup()
+{
+  pcre2_match_data_free(m_pcre_match_data);
+  pcre2_code_free(m_pcre);
+  reset();
+}
+
+void Regexp_processor_pcre::init(CHARSET_INFO *data_charset, int extra_flags)
+{
+  m_library_flags= default_regex_flags() | extra_flags |
+                  (data_charset != &my_charset_bin ?
+                   (PCRE2_UTF | PCRE2_UCP) : 0) |
+                  ((data_charset->state &
+                    (MY_CS_BINSORT | MY_CS_CSSORT)) ? 0 : PCRE2_CASELESS);
+
+  // Convert text data to utf-8.
+  m_library_charset= data_charset == &my_charset_bin ?
+                     &my_charset_bin : &my_charset_utf8mb3_general_ci;
+
+  m_conversion_is_needed= (data_charset != &my_charset_bin) &&
+                          !my_charset_same(data_charset, m_library_charset);
+}
 
 /**
   Convert string to lib_charset, if needed.

sql/item_cmpfunc.h

@@ -24,8 +24,6 @@
 #endif
 
 #include "item_func.h"             /* Item_int_func, Item_bool_func */
-#define PCRE2_STATIC 1             /* Important on Windows */
-#include "pcre2.h"                 /* pcre2 header file */
 #include "item.h"
 
 extern Item_result item_cmp_type(Item_result a,Item_result b);
@@ -2802,6 +2800,9 @@ class Item_func_like :public Item_bool_func2
 };
 
 
+typedef struct pcre2_real_code_8 pcre2_code;
+typedef struct pcre2_real_match_data_8 pcre2_match_data;
+#define PCRE2_SIZE size_t
 class Regexp_processor_pcre
 {
   pcre2_code *m_pcre;
@@ -2830,21 +2831,7 @@ class Regexp_processor_pcre
     m_library_charset(&my_charset_utf8mb3_general_ci)
   {}
   int default_regex_flags();
-  void init(CHARSET_INFO *data_charset, int extra_flags)
-  {
-    m_library_flags= default_regex_flags() | extra_flags |
-                    (data_charset != &my_charset_bin ?
-                     (PCRE2_UTF | PCRE2_UCP) : 0) |
-                    ((data_charset->state &
-                      (MY_CS_BINSORT | MY_CS_CSSORT)) ? 0 : PCRE2_CASELESS);
-
-    // Convert text data to utf-8.
-    m_library_charset= data_charset == &my_charset_bin ?
-                       &my_charset_bin : &my_charset_utf8mb3_general_ci;
-
-    m_conversion_is_needed= (data_charset != &my_charset_bin) &&
-                            !my_charset_same(data_charset, m_library_charset);
-  }
+  void init(CHARSET_INFO *data_charset, int extra_flags);
   void fix_owner(Item_func *owner, Item *subject_arg, Item *pattern_arg);
   bool compile(String *pattern, bool send_error);
   bool compile(Item *item, bool send_error);
@@ -2875,12 +2862,7 @@ class Regexp_processor_pcre
     m_pcre_match_data= NULL;
     m_prev_pattern.length(0);
   }
-  void cleanup()
-  {
-    pcre2_match_data_free(m_pcre_match_data);
-    pcre2_code_free(m_pcre);
-    reset();
-  }
+  void cleanup();
   bool is_compiled() const { return m_pcre != NULL; }
   bool is_const() const { return m_is_const; }
   void set_const(bool arg) { m_is_const= arg; }

sql/sys_vars.cc

@@ -67,6 +67,9 @@
 #include "semisync_slave.h"
 #include <ssl_compat.h>
 
+#define PCRE2_STATIC 1             /* Important on Windows */
+#include "pcre2.h"                 /* pcre2 header file */
+
 /*
   The rule for this file: everything should be 'static'. When a sys_var
   variable or a function from this file is - in very rare cases - needed