[1909] Move sqlite3 check to m4macros/ dir

configure.ac

@@ -388,8 +388,6 @@ In this case we will continue, but naming of python processes will not work.])
     fi
 fi
 
-# TODO: check for _sqlite3.py module
-
 # (g++ only check)
 # Python 3.2 has an unused parameter in one of its headers. This
 # has been reported, but not fixed as of yet, so we check if we need
@@ -1043,16 +1041,16 @@ AC_SUBST(GTEST_LDFLAGS)
 AC_SUBST(GTEST_LDADD)
 AC_SUBST(GTEST_SOURCE)
 
-dnl check for pkg-config itself so we don't try the m4 macro without pkg-config
+dnl check for pkg-config itself
 AC_CHECK_PROG(HAVE_PKG_CONFIG, pkg-config, yes, no)
 if test "x$HAVE_PKG_CONFIG" = "xno" ; then
   AC_MSG_ERROR(Please install pkg-config)
 fi
-PKG_CHECK_MODULES(SQLITE, sqlite3 >= 3.3.9, enable_features="$enable_features SQLite3")
 
-# Check for sqlite3 program
-AC_PATH_PROG(SQLITE3_PROGRAM, sqlite3, no)
-AM_CONDITIONAL(HAVE_SQLITE3_PROGRAM, test "x$SQLITE3_PROGRAM" != "xno")
+AX_SQLITE3_FOR_BIND10
+if test "x$have_sqlite" = "xyes" ; then
+  enable_features="$enable_features SQLite3"
+fi
 
 #
 # ASIO: we extensively use it as the C++ event management module.

m4macros/ax_sqlite3_for_bind10.m4

@@ -0,0 +1,28 @@
+dnl @synopsis AX_SQLITE3_FOR_BIND10
+dnl
+dnl Test for the sqlite3 library and program, intended to be used within
+dnl BIND 10, and to test BIND 10.
+dnl
+dnl We use pkg-config to look for the sqlite3 library, so the sqlite3
+dnl development package with the .pc file must be installed.
+dnl
+dnl This macro sets SQLITE_CFLAGS and SQLITE_LIBS. It also sets
+dnl SQLITE3_PROGRAM to the path of the sqlite3 program, if it is found
+dnl in PATH.
+
+AC_DEFUN([AX_SQLITE3_FOR_BIND10], [
+
+PKG_CHECK_MODULES(SQLITE, sqlite3 >= 3.3.9,
+    have_sqlite="yes",
+    have_sqlite="no (sqlite3 not detected)")
+
+AC_SUBST(SQLITE_CFLAGS)
+AC_SUBST(SQLITE_LIBS)
+
+# Check for sqlite3 program
+AC_PATH_PROG(SQLITE3_PROGRAM, sqlite3, no)
+AM_CONDITIONAL(HAVE_SQLITE3_PROGRAM, test "x$SQLITE3_PROGRAM" != "xno")
+
+# TODO: check for _sqlite3.py module
+
+])dnl AX_SQLITE3_FOR_BIND10