fix: Skip -fPIC flag for flang-new on Windows MSVC targets (#1167)

Author: perazz

src/fpm_compiler.F90

@@ -294,10 +294,17 @@ function get_default_flags(self, release) result(flags)
     ! Append position-independent code (PIC) flag, that is necessary 
     ! building shared libraries
     select case (self%id)
-    case (id_gcc, id_f95, id_caf, id_flang, id_flang_new, id_f18, id_lfortran, &
+    case (id_gcc, id_f95, id_caf, id_flang, id_f18, id_lfortran, &
           id_intel_classic_nix, id_intel_classic_mac, id_intel_llvm_nix, &
           id_pgi, id_nvhpc, id_nag, id_cray, id_ibmxl)
         pic_flag = " -fPIC"
+    case (id_flang_new)
+        ! flang-new doesn't support -fPIC on Windows MSVC target
+        if (get_os_type() == OS_WINDOWS) then
+            pic_flag = ""
+        else
+            pic_flag = " -fPIC"
+        end if
     case (id_intel_classic_windows, id_intel_llvm_windows)
         pic_flag = ""  ! Windows does not use -fPIC
     case default