Make suggested change to targets loop

Author: linuxrocks123

flang-rt/cmake/modules/AddFlangRT.cmake

@@ -190,19 +190,22 @@ function (add_flangrt_library name)
     endif ()
   endif ()
 
+  # Must use minimum optimization level of -O2 to prevent dependency on libstdc++
+  foreach (tgtname IN LISTS srctargets)
+    string(REPLACE "-O0" "-O2" CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS)
+    string(REPLACE "-O1" "-O2" CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS)
+    string(FIND "-O" CMAKE_CXX_FLAGS opt_idx)
+    if (opt_idx EQUAL -1)
+      target_compile_options(${tgtname} PRIVATE -O2)
+    endif ()
+  endforeach ()
+
   foreach (tgtname IN LISTS libtargets)
     if (NOT WIN32)
       # Use same stem name for .a and .so. Common in UNIX environments.
       # Not possible in Windows environments.
       set_target_properties(${tgtname} PROPERTIES OUTPUT_NAME "${name}")
 
-      # Must use minimum optimization level of -O2 to prevent dependency on libstdc++
-      string(REPLACE "-O0" "-O2" CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS)
-      string(REPLACE "-O1" "-O2" CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS)
-      string(FIND "-O" CMAKE_CXX_FLAGS opt_idx)
-      if (opt_idx EQUAL -1)
-        target_compile_options(${tgtname} PRIVATE -O2)
-      endif ()
     endif ()
 
     if (ARG_INSTALL_WITH_TOOLCHAIN)