build script: setup environment variables for all targets

build.py

@@ -89,6 +89,30 @@ class Target(BaseTarget):
             + os.pathsep + builder.bin_path
         self.environment['PKG_CONFIG_PATH'] = builder.lib_path + 'pkgconfig'
 
+        for prefix in ('CPP', 'C', 'CXX', 'OBJC', 'OBJCXX'):
+            varname = f'{prefix}FLAGS'
+
+            self._update_env(varname, f'-I{builder.include_path}')
+            self._set_sdk(builder, varname)
+            self._set_os_version(builder, varname)
+
+        ldflags = 'LDFLAGS'
+        self._update_env(ldflags, f'-L{builder.lib_path}')
+        self._set_sdk(builder, ldflags)
+        self._set_os_version(builder, ldflags)
+
+    def _update_env(self, name: str, value: str):
+        env = self.environment
+        env[name] = env[name] + ' ' + value if name in env else value
+
+    def _set_sdk(self, builder: 'Builder', varname: str):
+        if builder.sdk_path:
+            self._update_env(varname, f'-isysroot {builder.sdk_path}')
+
+    def _set_os_version(self, builder: 'Builder', varname: str):
+        if builder.os_version:
+            self._update_env(varname, f'-mmacosx-version-min={builder.os_version}')
+
     def install(self, builder: 'Builder', options: 'CommandLineOptions' = None):
         if builder.xcode:
             return
@@ -113,18 +137,6 @@ class MakeTarget(Target):
 
         Builder.symlink_directory(builder.source_path, builder.build_path)
 
-        for prefix in ('CPP', 'C', 'CXX', 'OBJC', 'OBJCXX'):
-            varname = f'{prefix}FLAGS'
-
-            self._update_env(varname, f'-I{builder.include_path}')
-            self._set_sdk(builder, varname)
-            self._set_os_version(builder, varname)
-
-        ldflags = 'LDFLAGS'
-        self._update_env(ldflags, f'-L{builder.lib_path}')
-        self._set_sdk(builder, ldflags)
-        self._set_os_version(builder, ldflags)
-
     def build(self, builder: 'Builder'):
         assert not builder.xcode
 
@@ -138,18 +150,6 @@ class MakeTarget(Target):
         work_path = builder.build_path + self.src_root
         subprocess.check_call(args, cwd=work_path, env=self.environment)
 
-    def _update_env(self, name: str, value: str):
-        env = self.environment
-        env[name] = env[name] + ' ' + value if name in env else value
-
-    def _set_sdk(self, builder: 'Builder', varname: str):
-        if builder.sdk_path:
-            self._update_env(varname, f'-isysroot {builder.sdk_path}')
-
-    def _set_os_version(self, builder: 'Builder', varname: str):
-        if builder.os_version:
-            self._update_env(varname, f'-mmacosx-version-min={builder.os_version}')
-
 
 class ConfigureMakeTarget(Target):
     def __init__(self, name=None):