r286210 - cmake: Don't try to install exports if there aren't any

[Justin Bogner via cfe-commits]

Author: bogner
Date: Mon Nov  7 23:02:33 2016
New Revision: 286210

URL: http://llvm.org/viewvc/llvm-project?rev=286210&view=rev
Log:
cmake: Don't try to install exports if there aren't any

When using LLVM_DISTRIBUTION_COMPONENTS, it's possible for clang's
export list to be empty. If this happens the install(EXPORTS) command
will fail, but since there isn't anything to install anyway we really
just want to skip it.

Modified:
    cfe/trunk/cmake/modules/AddClang.cmake
    cfe/trunk/cmake/modules/CMakeLists.txt

Modified: cfe/trunk/cmake/modules/AddClang.cmake
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/cmake/modules/AddClang.cmake?rev=286210&r1=286209&r2=286210&view=diff
==============================================================================
--- cfe/trunk/cmake/modules/AddClang.cmake (original)
+++ cfe/trunk/cmake/modules/AddClang.cmake Mon Nov  7 23:02:33 2016
@@ -93,6 +93,7 @@ macro(add_clang_library name)
       if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
           NOT LLVM_DISTRIBUTION_COMPONENTS)
         set(export_to_clangtargets EXPORT ClangTargets)
+        set_property(GLOBAL PROPERTY CLANG_HAS_EXPORTS True)
       endif()
 
       install(TARGETS ${name}
@@ -137,6 +138,7 @@ macro(add_clang_tool name)
     if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
         NOT LLVM_DISTRIBUTION_COMPONENTS)
       set(export_to_clangtargets EXPORT ClangTargets)
+      set_property(GLOBAL PROPERTY CLANG_HAS_EXPORTS True)
     endif()
 
     install(TARGETS ${name}

Modified: cfe/trunk/cmake/modules/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/cmake/modules/CMakeLists.txt?rev=286210&r1=286209&r2=286210&view=diff
==============================================================================
--- cfe/trunk/cmake/modules/CMakeLists.txt (original)
+++ cfe/trunk/cmake/modules/CMakeLists.txt Mon Nov  7 23:02:33 2016
@@ -39,7 +39,10 @@ set(CLANG_CONFIG_CMAKE_DIR)
 set(CLANG_CONFIG_EXPORTS_FILE)
 
 if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-  install(EXPORT ClangTargets DESTINATION ${CLANG_INSTALL_PACKAGE_DIR})
+  get_property(clang_has_exports GLOBAL PROPERTY CLANG_HAS_EXPORTS)
+  if(clang_has_exports)
+    install(EXPORT ClangTargets DESTINATION ${CLANG_INSTALL_PACKAGE_DIR})
+  endif()
 
   install(FILES
     ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/ClangConfig.cmake