Index: flang/cmake/modules/AddFlang.cmake
===================================================================
--- flang/cmake/modules/AddFlang.cmake
+++ flang/cmake/modules/AddFlang.cmake
@@ -16,6 +16,27 @@
   add_llvm_subdirectory(FLANG TOOL ${name})
 endmacro()
 
+macro(install_flang_library name)
+  if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "libflang")
+    get_target_export_arg(${name} Flang export_to_flangtargets UMBRELLA flang-libraries)
+    install(TARGETS ${name}
+      COMPONENT ${name}
+      ${export_to_flangtargets}
+      LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
+      ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
+      RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
+
+    if (NOT LLVM_ENABLE_IDE)
+      add_llvm_install_targets(install-${name}
+                               DEPENDS ${name}
+                               COMPONENT ${name})
+    endif()
+
+    set_property(GLOBAL APPEND PROPERTY FLANG_LIBS ${name})
+  endif()
+  set_property(GLOBAL APPEND PROPERTY FLANG_EXPORTS ${name})
+endmacro()
+
 macro(add_flang_library name)
   cmake_parse_arguments(ARG
     "SHARED"
@@ -64,25 +85,7 @@
   llvm_add_library(${name} ${LIBTYPE} ${ARG_UNPARSED_ARGUMENTS} ${srcs})
 
   if (TARGET ${name})
-
-    if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "libflang")
-      get_target_export_arg(${name} Flang export_to_flangtargets UMBRELLA flang-libraries)
-      install(TARGETS ${name}
-        COMPONENT ${name}
-        ${export_to_flangtargets}
-        LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
-        ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
-        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
-
-      if (NOT LLVM_ENABLE_IDE)
-        add_llvm_install_targets(install-${name}
-                                 DEPENDS ${name}
-                                 COMPONENT ${name})
-      endif()
-
-      set_property(GLOBAL APPEND PROPERTY FLANG_LIBS ${name})
-    endif()
-    set_property(GLOBAL APPEND PROPERTY FLANG_EXPORTS ${name})
+    install_flang_library(${name})
   else()
     # Add empty "phony" target
     add_custom_target(${name})
Index: flang/runtime/FortranMain/CMakeLists.txt
===================================================================
--- flang/runtime/FortranMain/CMakeLists.txt
+++ flang/runtime/FortranMain/CMakeLists.txt
@@ -1,3 +1,5 @@
 llvm_add_library(Fortran_main STATIC
   Fortran_main.c
 )
+
+install_flang_library(Fortran_main)