Install pkg-config files also on mingw
diff --git a/cmake/modules/PopplerMacros.cmake b/cmake/modules/PopplerMacros.cmake
index 95af97c..aa5ca6d 100644
--- a/cmake/modules/PopplerMacros.cmake
+++ b/cmake/modules/PopplerMacros.cmake
@@ -43,10 +43,10 @@
 endmacro(POPPLER_ADD_UNITTEST)
 
 macro(POPPLER_CREATE_INSTALL_PKGCONFIG generated_file install_location)
-  if(NOT WIN32)
+  if(NOT MSVC)
     configure_file(${generated_file}.cmake ${CMAKE_CURRENT_BINARY_DIR}/${generated_file} @ONLY)
     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${generated_file} DESTINATION ${install_location})
-  endif(NOT WIN32)
+  endif(NOT MSVC)
 endmacro(POPPLER_CREATE_INSTALL_PKGCONFIG)
 
 macro(SHOW_END_MESSAGE what value)