Don't install flang_rt.unittest target

Author: Meinersbur

flang-rt/cmake/modules/AddFlangRT.cmake

@@ -37,6 +37,13 @@ function (add_flangrt_library name)
     "${multiValueArgs}"
     ${ARGN})
 
+  if (ARG_INSTALL_WITH_TOOLCHAIN AND ARG_EXCLUDE_FROM_ALL)
+     message(SEND_ERROR "add_flangrt_library(${name} ...):
+       INSTALL_WITH_TOOLCHAIN and EXCLUDE_FROM_ALL are in conflict. When
+       installing an artifact it must have been built first in the 'all' target.
+     ")
+  endif ()
+
   # Also add header files to IDEs to list as part of the library
   set_source_files_properties(${ARG_ADDITIONAL_HEADERS} PROPERTIES HEADER_FILE_ONLY ON)
 

flang-rt/lib/flang_rt/CMakeLists.txt

@@ -151,7 +151,6 @@ else()
     add_flangrt_library(${name} ${libtype}
         ${sources}
         ${ARGN}
-        INSTALL_WITH_TOOLCHAIN
         ADDITIONAL_HEADERS ${public_headers} ${private_headers}
       )
 
@@ -168,8 +167,8 @@ else()
     add_dependencies(flang_rt ${name})
   endfunction ()
 
-  add_win_flangrt_library(STATIC static     MultiThreaded)
-  add_win_flangrt_library(STATIC static_dbg MultiThreadedDebug)
+  add_win_flangrt_library(STATIC static     MultiThreaded      INSTALL_WITH_TOOLCHAIN)
+  add_win_flangrt_library(STATIC static_dbg MultiThreadedDebug INSTALL_WITH_TOOLCHAIN)
 
   # unittests link against LLVMSupport which is compiled with /MD
   add_win_flangrt_library(STATIC unittest   MultiThreadedDLL EXCLUDE_FROM_ALL)