Select the default platform depending of the target.

Default platform `android` is better for `kiwix-android`
(because `kiwix-android` can build only on `android` platform).

README.md

@@ -71,8 +71,10 @@ By default, `kiwix-build` will build `kiwix-tools` .
 
 ## Target platform
 
-By default, `kiwix-build` will build everything for the current (native)
-platform using dynamic linkage (`native_dyn`).
+If no target platform is specified, a default one will be infered from
+the specified target :
+- `kiwix-android` will be build using the platform `android`
+- Other targets will be build using the platform `native_dyn`
 
 But you can select another target platform using the option
 `--target-platform`. For now, there is ten different supported

kiwixbuild/__init__.py

@@ -14,7 +14,7 @@ def parse_args():
                         choices=Dependency.all_deps.keys())
     parser.add_argument('--working-dir', default=".")
     parser.add_argument('--libprefix', default=None)
-    parser.add_argument('--target-platform', default="native_dyn", choices=PlatformInfo.all_platforms)
+    parser.add_argument('--target-platform', choices=PlatformInfo.all_platforms)
     parser.add_argument('--verbose', '-v', action="store_true",
                         help=("Print all logs on stdout instead of in specific"
                               " log files per commands"))

kiwixbuild/builder.py

@@ -17,7 +17,13 @@ class Builder:
         self._targets = {}
         PlatformInfo.get_platform('neutral', self._targets)
 
-        platform = PlatformInfo.get_platform(option('target_platform'), self._targets)
+        target_platform = option('target_platform')
+        if not target_platform:
+            if option('target') == 'kiwix-android':
+                target_platform = 'android'
+            else:
+                target_platform = 'native_dyn'
+        platform = PlatformInfo.get_platform(target_platform, self._targets)
         self.targetDefs = platform.add_targets(option('target'), self._targets)
 
     def finalize_target_steps(self):