Added busy handler and busy timeout interfaces.

Author: interkosmos

Makefile

@@ -19,8 +19,9 @@ all: $(TARGET)
 test: $(TEST)
 
 $(TARGET):
+	$(FC) $(FFLAGS) -c src/sqlite_util.f90
 	$(FC) $(FFLAGS) -c src/sqlite.f90
-	$(AR) $(ARFLAGS) $(TARGET) sqlite.o
+	$(AR) $(ARFLAGS) $(TARGET) sqlite_util.o sqlite.o
 
 $(TEST): $(TARGET)
 	$(FC) $(FFLAGS) $(LDFLAGS) -o test_sqlite test/test_sqlite.f90 $(TARGET) $(LDLIBS)

README.md

@@ -56,16 +56,16 @@ CREATE TABLE example_table (
 The program opens a database `example.db`, creates the table `example_table`,
 inserts some values, then reads them back in, and prints them to console.
 
-The (optional) module `sqlite_util` contains C interoperability
-functions/interfaces to convert C char pointer to Fortran allocatable
-character.
+The module `sqlite_util` contains C interoperability functions/interfaces to
+convert C char pointer to Fortran allocatable character.
 
 ```fortran
 ! example.f90
 program example
     use, intrinsic :: iso_c_binding
     use :: sqlite
     use :: sqlite_util
+    implicit none (type, external)
     character(len=:), allocatable :: errmsg
     integer                       :: rc
     type(c_ptr)                   :: db