Use system library if present

README.md

@@ -9,6 +9,9 @@ Simple SQLite app built with Meson, adapted from the public domain example found
 - Meson
 - Ninja
 
+If the SQLite3 library is present on the system, the app will use that. Otherwise,
+an older version will be downloaded from Meson's WrapDB.
+
 ## Building
 
 ```bash
@@ -17,6 +20,14 @@ ninja -C builddir
 ninja -C builddir test
 ```
 
+## Usage
+
+`sqlite-test DATABASE SQL-STATEMENT`
+
+Example:
+
+`sqlite-test test.db "create table tbl1(one varchar(10), two smallint)"`
+
 ## License
 
 Public domain per [The Unlicense](LICENSE).

meson.build

@@ -5,8 +5,12 @@ project('meson-sqlite', 'cpp',
                      'cpp_std=c++14'])
 
 # Set up dependencies
-sqlite_proj = subproject('sqlite')
-sqlite_dep = sqlite_proj.get_variable('sqlite_dep')
+sqlite_dep = dependency('sqlite3', required : false)
+
+if not sqlite_dep.found()
+  sqlite_proj = subproject('sqlite')
+  sqlite_dep = sqlite_proj.get_variable('sqlite_dep')
+endif
 
 # Compile the program
 exe = executable('sqlite-test', 'sqlite-test.cpp',