[llvm] r286209 - cmake: Don't try to install exports if there aren't any

[Justin Bogner via llvm-commits]

Author: bogner
Date: Mon Nov  7 23:02:18 2016
New Revision: 286209

URL: http://llvm.org/viewvc/llvm-project?rev=286209&view=rev
Log:
cmake: Don't try to install exports if there aren't any

When using LLVM_DISTRIBUTION_COMPONENTS, it's possible for LLVM'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:
    llvm/trunk/cmake/modules/AddLLVM.cmake
    llvm/trunk/cmake/modules/CMakeLists.txt

Modified: llvm/trunk/cmake/modules/AddLLVM.cmake
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/cmake/modules/AddLLVM.cmake?rev=286209&r1=286208&r2=286209&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/AddLLVM.cmake (original)
+++ llvm/trunk/cmake/modules/AddLLVM.cmake Mon Nov  7 23:02:18 2016
@@ -587,6 +587,7 @@ macro(add_llvm_library name)
       if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
           NOT LLVM_DISTRIBUTION_COMPONENTS)
         set(export_to_llvmexports EXPORT LLVMExports)
+        set_property(GLOBAL PROPERTY LLVM_HAS_EXPORTS True)
       endif()
 
       install(TARGETS ${name}
@@ -627,6 +628,7 @@ macro(add_llvm_loadable_module name)
         if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
             NOT LLVM_DISTRIBUTION_COMPONENTS)
           set(export_to_llvmexports EXPORT LLVMExports)
+          set_property(GLOBAL PROPERTY LLVM_HAS_EXPORTS True)
         endif()
 
         install(TARGETS ${name}
@@ -811,6 +813,7 @@ macro(add_llvm_tool name)
       if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
           NOT LLVM_DISTRIBUTION_COMPONENTS)
         set(export_to_llvmexports EXPORT LLVMExports)
+        set_property(GLOBAL PROPERTY LLVM_HAS_EXPORTS True)
       endif()
 
       install(TARGETS ${name}

Modified: llvm/trunk/cmake/modules/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/cmake/modules/CMakeLists.txt?rev=286209&r1=286208&r2=286209&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/CMakeLists.txt (original)
+++ llvm/trunk/cmake/modules/CMakeLists.txt Mon Nov  7 23:02:18 2016
@@ -103,8 +103,11 @@ configure_file(
   @ONLY)
 
 if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-  install(EXPORT LLVMExports DESTINATION ${LLVM_INSTALL_PACKAGE_DIR}
-          COMPONENT cmake-exports)
+  get_property(llvm_has_exports GLOBAL PROPERTY LLVM_HAS_EXPORTS)
+  if(llvm_has_exports)
+    install(EXPORT LLVMExports DESTINATION ${LLVM_INSTALL_PACKAGE_DIR}
+            COMPONENT cmake-exports)
+  endif()
 
   install(FILES
     ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/LLVMConfig.cmake