From da2a29a17cb4a8af4a1607edb3855f10a9384a2b Mon Sep 17 00:00:00 2001
From: Michal Gorny <mgorny@gentoo.org>
Date: Fri, 11 Oct 2019 14:32:43 +0000
Subject: [PATCH] [llvm] [ocaml] Support linking against dylib

Support linking OCaml modules against LLVM dylib when requested,
rather than against static libs that might not be installed at all.

Differential Revision: https://reviews.llvm.org/D68452

llvm-svn: 374556
---
 llvm/cmake/modules/AddOCaml.cmake | 32 +++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/llvm/cmake/modules/AddOCaml.cmake b/llvm/cmake/modules/AddOCaml.cmake
index 02bab6846376..554046b20edf 100644
--- a/llvm/cmake/modules/AddOCaml.cmake
+++ b/llvm/cmake/modules/AddOCaml.cmake
@@ -66,21 +66,25 @@ function(add_ocaml_library name)
     list(APPEND ocaml_flags "-custom")
   endif()
 
-  explicit_map_components_to_libraries(llvm_libs ${ARG_LLVM})
-  foreach( llvm_lib ${llvm_libs} )
-    list(APPEND ocaml_flags "-l${llvm_lib}" )
-  endforeach()
+  if(LLVM_LINK_LLVM_DYLIB)
+    list(APPEND ocaml_flags "-lLLVM")
+  else()
+    explicit_map_components_to_libraries(llvm_libs ${ARG_LLVM})
+    foreach( llvm_lib ${llvm_libs} )
+      list(APPEND ocaml_flags "-l${llvm_lib}" )
+    endforeach()
 
-  get_property(system_libs TARGET LLVMSupport PROPERTY LLVM_SYSTEM_LIBS)
-  foreach(system_lib ${system_libs})
-    if (system_lib MATCHES "^-")
-      # If it's an option, pass it without changes.
-      list(APPEND ocaml_flags "${system_lib}" )
-    else()
-      # Otherwise assume it's a library name we need to link with.
-      list(APPEND ocaml_flags "-l${system_lib}" )
-    endif()
-  endforeach()
+    get_property(system_libs TARGET LLVMSupport PROPERTY LLVM_SYSTEM_LIBS)
+    foreach(system_lib ${system_libs})
+      if (system_lib MATCHES "^-")
+        # If it's an option, pass it without changes.
+        list(APPEND ocaml_flags "${system_lib}" )
+      else()
+        # Otherwise assume it's a library name we need to link with.
+        list(APPEND ocaml_flags "-l${system_lib}" )
+      endif()
+    endforeach()
+  endif()
 
   string(REPLACE ";" " " ARG_CFLAGS "${ARG_CFLAGS}")
   set(c_flags "${ARG_CFLAGS} ${LLVM_DEFINITIONS}")