master ae497d75f7: Fix warnings in sqlite.c in the MS-Windows build

[Eli Zaretskii]

branch: master
commit ae497d75f74f7ef0830f6cb760fa786a589e290d
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix warnings in sqlite.c in the MS-Windows build
    
    * src/sqlite.c (sqlite3_errstr) [WINDOWSNT]: Define and load from
    the DLL only if the SQLite3 version is at least 3.7.15.
    (sqlite_prepare_errdata) [SQLITE_VERSION_NUMBER >= 3007015]: Use
    the original code if sqlite3_errstr is available.
---
 src/sqlite.c | 32 +++++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 11 deletions(-)

diff --git a/src/sqlite.c b/src/sqlite.c
index 906d064000..ac860f55bc 100644
--- a/src/sqlite.c
+++ b/src/sqlite.c
@@ -52,7 +52,9 @@ DEF_DLL_FN (SQLITE_API int, sqlite3_bind_null, 
(sqlite3_stmt*, int));
 DEF_DLL_FN (SQLITE_API int, sqlite3_bind_int, (sqlite3_stmt*, int, int));
 DEF_DLL_FN (SQLITE_API int, sqlite3_extended_errcode, (sqlite3*));
 DEF_DLL_FN (SQLITE_API const char*, sqlite3_errmsg, (sqlite3*));
+#if SQLITE_VERSION_NUMBER >= 3007015
 DEF_DLL_FN (SQLITE_API const char*, sqlite3_errstr, (int));
+#endif
 DEF_DLL_FN (SQLITE_API int, sqlite3_step, (sqlite3_stmt*));
 DEF_DLL_FN (SQLITE_API int, sqlite3_changes, (sqlite3*));
 DEF_DLL_FN (SQLITE_API int, sqlite3_column_count, (sqlite3_stmt*));
@@ -91,7 +93,9 @@ DEF_DLL_FN (SQLITE_API int, sqlite3_load_extension,
 # undef sqlite3_bind_int
 # undef sqlite3_extended_errcode
 # undef sqlite3_errmsg
-# undef sqlite3_errstr
+# if SQLITE_VERSION_NUMBER >= 3007015
+#  undef sqlite3_errstr
+# endif
 # undef sqlite3_step
 # undef sqlite3_changes
 # undef sqlite3_column_count
@@ -117,7 +121,9 @@ DEF_DLL_FN (SQLITE_API int, sqlite3_load_extension,
 # define sqlite3_bind_int fn_sqlite3_bind_int
 # define sqlite3_extended_errcode fn_sqlite3_extended_errcode
 # define sqlite3_errmsg fn_sqlite3_errmsg
-# define sqlite3_errstr fn_sqlite3_errstr
+# if SQLITE_VERSION_NUMBER >= 3007015
+#  define sqlite3_errstr fn_sqlite3_errstr
+# endif
 # define sqlite3_step fn_sqlite3_step
 # define sqlite3_changes fn_sqlite3_changes
 # define sqlite3_column_count fn_sqlite3_column_count
@@ -146,7 +152,9 @@ load_dll_functions (HMODULE library)
   LOAD_DLL_FN (library, sqlite3_bind_int);
   LOAD_DLL_FN (library, sqlite3_extended_errcode);
   LOAD_DLL_FN (library, sqlite3_errmsg);
+#if SQLITE_VERSION_NUMBER >= 3007015
   LOAD_DLL_FN (library, sqlite3_errstr);
+#endif
   LOAD_DLL_FN (library, sqlite3_step);
   LOAD_DLL_FN (library, sqlite3_changes);
   LOAD_DLL_FN (library, sqlite3_column_count);
@@ -428,14 +436,17 @@ row_to_value (sqlite3_stmt *stmt)
 static Lisp_Object
 sqlite_prepare_errdata (int code, sqlite3 *sdb)
 {
-  Lisp_Object errstr, errcode, ext_errcode;
-  const char *errmsg;
+  Lisp_Object errcode = make_fixnum (code);
+  const char *errmsg = sqlite3_errmsg (sdb);
+  Lisp_Object lerrmsg = errmsg ? build_string (errmsg) : Qnil;
+  Lisp_Object errstr, ext_errcode;
 
-  /* The internet says this is identical to sqlite3_errstr (code),
-     which is too new to exist on Fedora 9.  */
-  errmsg = sqlite3_errmsg (sdb);
-  errstr = errmsg ? build_string (errmsg) : Qnil;
-  errcode = make_fixnum (code);
+#if SQLITE_VERSION_NUMBER >= 3007015
+  errstr = build_string (sqlite3_errstr (code));
+#else
+  /* The internet says this is identical to sqlite3_errstr (code).  */
+  errstr = lerrmsg;
+#endif
 
   /* More details about what went wrong.  */
 #if SQLITE_VERSION_NUMBER >= 3006005
@@ -445,8 +456,7 @@ sqlite_prepare_errdata (int code, sqlite3 *sdb)
   ext_errcode = make_fixnum (0);
 #endif
 
-  return list4 (errstr, errmsg ? build_string (errmsg) : Qnil,
-               errcode, ext_errcode);
+  return list4 (errstr, lerrmsg, errcode, ext_errcode);
 }
 
 DEFUN ("sqlite-execute", Fsqlite_execute, Ssqlite_execute, 2, 3, 0,