build: refactoring meson script.

move out engine/loader dependency to its immediate parent folders.

Change-Id: I7f08433fc6d2a333951fceaffea81cbe2e5da9e3

meson.build

@@ -1,6 +1,6 @@
 project('thorvg',
         'cpp',
-        default_options : ['buildtype=debugoptimized', 'werror=false', 'cpp_std=c++17', 'optimization=s'],
+        default_options : ['buildtype=debugoptimized', 'werror=false', 'optimization=s'],
         version : '0.1.0',
         license : 'Apache-2.0')
 

src/lib/meson.build

@@ -25,8 +25,10 @@ source_file = [
    'tvgSwCanvas.cpp',
 ]
 
-src_dep = declare_dependency(
+engine_dep = [swengine_dep, glengine_dep]
+
+common_dep = declare_dependency(
+   dependencies        : engine_dep,
    include_directories : include_directories('.'),
    sources             : source_file
 )
-

src/loaders/meson.build

@@ -1 +1,6 @@
 subdir('svg_loader')
+
+loader_dep = declare_dependency(
+   dependencies        : svgloader_dep,
+   include_directories : include_directories('.'),
+)

src/meson.build

@@ -5,8 +5,7 @@ subdir('loaders')
 subdir('examples')
 
 thread_dep = meson.get_compiler('cpp').find_library('pthread')
-thorvg_lib_dep = [ src_dep, swengine_dep, glengine_dep, svgloader_dep, thread_dep]
-
+thorvg_lib_dep = [ common_dep, loader_dep, thread_dep]
 
 thorvg_lib = library(
 	'thorvg',