ENH: Added subproject support(lib) to the meson.build and also added meson.options

meson.build

@@ -2,9 +2,11 @@ project('seldon', 'cpp',
   version : '0.1',
   default_options : ['warning_level=3', 'cpp_std=c++20', 'optimization=3'])
 
-add_global_arguments(['-Wno-unused-local-typedefs', '-Wno-array-bounds'], language : 'cpp')
+deps = []
+cpp_args = ['-Wno-unused-local-typedefs', '-Wno-array-bounds']
 
 incdir = include_directories('include')
+deps += [dependency('fmt'), dependency('tomlplusplus')]
 
 sources_seldon = [
   'src/config_parser.cpp',
@@ -16,33 +18,64 @@ sources_seldon = [
   'src/util/tomlplusplus.cpp',
 ]
 
-exe = executable('seldon', sources_seldon + 'src/main.cpp',
-  install : true,
-  dependencies : [dependency('fmt'), dependency('tomlplusplus')],
-  include_directories : incdir
-  )
-
-
-tests = [
-  ['Test_Tarjan', 'test/test_tarjan.cpp'],
-  ['Test_DeGroot', 'test/test_deGroot.cpp'],
-  ['Test_Activity_Driven', 'test/test_activity.cpp'],
-  ['Test_Activity_Driven_Inertial', 'test/test_activity_inertial.cpp'],
-  ['Test_Deffuant', 'test/test_deffuant.cpp'],
-  ['Test_Network', 'test/test_network.cpp'],
-  ['Test_Network_Generation', 'test/test_network_generation.cpp'],
-  ['Test_Sampling', 'test/test_sampling.cpp'],
-  ['Test_IO', 'test/test_io.cpp'],
-  ['Test_Util', 'test/test_util.cpp'],
-  ['Test_Prob', 'test/test_probability_distributions.cpp'],
-]
+# both static and shared library for bindings
+# -----------------------------------
+symbol_visibility = 'default'
+if get_option('default_library') == 'static'
+  # from https://github.com/ERGO-Code/HiGHS/pull/1737/files
+  symbol_visibility = 'inlineshidden'
+endif
+
+# both libraries
+seldon_lib = both_libraries('seldon',
+  sources_seldon,
+  install:true,
+  dependencies: deps,
+  include_directories:incdir,
+  gnu_symbol_visibility: symbol_visibility,
+  pic: true,
+  cpp_args : cpp_args,
+)
+
+seldon_static_dep = declare_dependency(include_directories:incdir,
+  link_with : seldon_lib.get_static_lib(), dependencies: deps)
+seldon_shared_dep = declare_dependency(include_directories : incdir,
+  link_with : seldon_lib.get_shared_lib(), dependencies: deps)
+# ------------------------------------
+
+if get_option('build_exe')
+  exe = executable('seldon', sources_seldon + 'src/main.cpp',
+    install : true,
+    dependencies : deps,
+    include_directories : incdir,
+    cpp_args : cpp_args
+    )
+endif
+
+if get_option('build_tests')
+  tests = [
+    ['Test_Tarjan', 'test/test_tarjan.cpp'],
+    ['Test_DeGroot', 'test/test_deGroot.cpp'],
+    ['Test_Activity_Driven', 'test/test_activity.cpp'],
+    ['Test_Activity_Driven_Inertial', 'test/test_activity_inertial.cpp'],
+    ['Test_Deffuant', 'test/test_deffuant.cpp'],
+    ['Test_Network', 'test/test_network.cpp'],
+    ['Test_Network_Generation', 'test/test_network_generation.cpp'],
+    ['Test_Sampling', 'test/test_sampling.cpp'],
+    ['Test_IO', 'test/test_io.cpp'],
+    ['Test_Util', 'test/test_util.cpp'],
+    ['Test_Prob', 'test/test_probability_distributions.cpp'],
+  ]
 
-Catch2 = dependency('Catch2', method : 'cmake', modules : ['Catch2::Catch2WithMain', 'Catch2::Catch2'])
+  Catch2 = dependency('Catch2', method : 'cmake', modules : ['Catch2::Catch2WithMain', 'Catch2::Catch2'])
+  deps+= Catch2
 
-foreach t : tests
-  exe = executable(t.get(0), sources_seldon + t.get(1),
-    dependencies : [dependency('fmt'), dependency('tomlplusplus'), Catch2],
-    include_directories : incdir
-  )
-  test(t.get(0), exe, workdir : meson.project_source_root())
-endforeach
+  foreach t : tests
+    exe = executable(t.get(0), sources_seldon + t.get(1),
+      dependencies : deps,
+      include_directories : incdir,
+      cpp_args : cpp_args
+    )
+    test(t.get(0), exe, workdir : meson.project_source_root())
+  endforeach
+endif

meson.options

@@ -0,0 +1,2 @@
+option('build_tests', type : 'boolean', value : true, description : 'Enable building of the tests')
+option('build_exe', type : 'boolean', value : true, description : 'Enable building of the executable')