PGI -shared is for Linux only

mesonbuild/compilers/mixins/pgi.py

@@ -61,9 +61,16 @@ class PGICompiler():
     def get_no_warn_args(self) -> typing.List[str]:
         return ['-silent']
 
+    def get_std_shared_lib_link_args(self) -> typing.List[str]:
+        # PGI -shared is Linux only.
+        if self.compiler_type.is_osx_compiler or self.compiler_type.is_windows_compiler:
+            return []
+        return ['-shared']
+
     def get_pic_args(self) -> typing.List[str]:
+        # PGI -fPIC is Linux only.
         if self.compiler_type.is_osx_compiler or self.compiler_type.is_windows_compiler:
-            return [] # PGI -fPIC is Linux only.
+            return []
         return ['-fPIC']
 
     def openmp_flags(self) -> typing.List[str]: