Merge pull request #1721 from rouault/require_sqlite_3_11

Build: require SQLite 3.11 (refs #1718)

CMakeLists.txt

@@ -127,6 +127,12 @@ if(NOT SQLITE3_FOUND)
   message(SEND_ERROR "sqlite3 dependency not found!")
 endif()
 
+# Would build and run with older versons, but with horrible performance
+# See https://github.com/OSGeo/PROJ/issues/1718
+IF("${SQLITE3_VERSION}" VERSION_LESS "3.11")
+  message(SEND_ERROR "sqlite3 >= 3.11 required!")
+ENDIF()
+
 ################################################################################
 # threading configuration
 ################################################################################

cmake/FindSqlite3.cmake

@@ -10,6 +10,7 @@
 # and following variables are set:
 #    SQLITE3_INCLUDE_DIR
 #    SQLITE3_LIBRARY
+#    SQLITE3_VERSION
 
 
 # find_path and find_library normally search standard locations
@@ -53,9 +54,21 @@ if(SQLITE3_INCLUDE_DIR AND SQLITE3_LIBRARY)
   set(SQLITE3_FOUND TRUE)
 endif()
 
+# Extract version information from the header file
+if(SQLITE3_INCLUDE_DIR)
+    file(STRINGS ${SQLITE3_INCLUDE_DIR}/sqlite3.h _ver_line
+         REGEX "^#define SQLITE_VERSION  *\"[0-9]+\\.[0-9]+\\.[0-9]+\""
+         LIMIT_COUNT 1)
+    string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+"
+           SQLITE3_VERSION "${_ver_line}")
+    unset(_ver_line)
+endif()
+
+
 if(SQLITE3_FOUND)
   if(NOT SQLITE3_FIND_QUIETLY)
     message(STATUS "Found Sqlite3: ${SQLITE3_LIBRARY}")
+    message(STATUS "Sqlite3 version: ${SQLITE3_VERSION}")
   endif()
 
 else()

configure.ac

@@ -280,7 +280,11 @@ dnl Check for sqlite3 library and binary
 dnl ---------------------------------------------------------------------------
 
 if test "x$SQLITE3_CFLAGS$SQLITE3_LIBS" = "x" ; then
-    PKG_CHECK_MODULES([SQLITE3], [sqlite3 >= 3.7])
+
+    dnl Would build and run with older versons, but with horrible performance
+    dnl See https://github.com/OSGeo/PROJ/issues/1718
+
+    PKG_CHECK_MODULES([SQLITE3], [sqlite3 >= 3.11])
 fi
 AC_SUBST(SQLITE3_CFLAGS,$SQLITE3_CFLAGS)
 AC_SUBST(SQLITE3_LIBS,$SQLITE3_LIBS)

docs/source/install.rst

@@ -126,15 +126,20 @@ Compilation and installation from source code
 The classical way of installing PROJ is via the source code distribution. The
 most recent version is available from the :ref:`download page<current_release>`.
 
-PROJ requires C and C++11 compilers. It also requires SQLite3 (headers,
-library and executable).
-
 You will need that and at least the standard *proj-datumgrid* package for a
 successful installation.
 
 The following guides show how to compile and install the software using the
 Autotools and CMake build systems.
 
+Build requirements
+--------------------------------------------------------------------------------
+
+- C99 compiler
+- C++11 compiler
+- SQLite3 >= 3.11 (headers, library and executable)
+- GNU make for autotools build or CMake >= 3.5
+
 Autotools
 --------------------------------------------------------------------------------