Add -lfint for Flint < 3.1.0

Author: oscarbenjamin

meson.build

@@ -9,6 +9,14 @@ gmp_dep = dependency('gmp')
 mpfr_dep = dependency('mpfr')
 flint_dep = dependency('flint')
 
+flint_dep = dependency('flint')
+if flint_dep.version().version_compare('<3.1')
+    flint_dep = declare_dependency(
+        dependencies: flint_dep,
+        link_args: ['-lflint'],
+    )
+endif
+
 pyflint_deps = [dep_py, gmp_dep, mpfr_dep, flint_dep]
 
 subdir('src/flint')