From 492c2935be35b75c77ab8db19b63fca812ebea5c Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Tue, 11 Jan 2005 04:31:07 +0000
Subject: Implement the LOADABLE_MODULE option when building a shared library.
 This passes the -module option on the libtool command line to ensure that the
 shared library being built can be dlopened and dlsym can work on that module.
 LOADABLE_MODULE should be sent only in conjunction with the SHARED_LIBRARY
 directive. It should generally be used for any module that is intended to be
 the target of an LLVM -load option. Note that loadable modules will not have
 the lib prefix but otherwise look like shared libraries. This is per the
 libtool recommendations and prevents these special shared libraries from
 being linked in via -l option to the linker.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19454 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.rules | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

(limited to 'Makefile.rules')

diff --git a/Makefile.rules b/Makefile.rules
index d6ed2d5316..7badbddd76 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -264,11 +264,16 @@ LLVMGXXWITHPATH  := PATH="$(LLVMToolDir):$(PATH)" $(LLVMGXX)
 # Adjust to user's request
 #--------------------------------------------------------------------
 
-# Adjust LIBTOOL flags for shared libraries, or not.
-ifndef SHARED_LIBRARY
-  LibTool.Flags += --tag=disable-shared
-else
+# Adjust LD.Flags and Libtool.Flags depending on the kind of library that is
+# to be built. Note that if LOADABLE_MODULE is specified then the resulting
+# shared library can be opened with dlopen
+ifdef SHARED_LIBRARY
   LD.Flags += -rpath $(LibDir)
+  ifdef LOADABLE_MODULE
+    LD.Flags += -module
+  endif
+else
+  LibTool.Flags += --tag=disable-shared
 endif
 
 ifdef TOOL_VERBOSE
@@ -571,7 +576,11 @@ ifdef LIBRARYNAME
 
 # Make sure there isn't any extranous whitespace on the LIBRARYNAME option
 LIBRARYNAME := $(strip $(LIBRARYNAME))
+ifdef LOADABLE_MODULE
+LibName.LA := $(LibDir)/$(LIBRARYNAME).la
+else
 LibName.LA := $(LibDir)/lib$(LIBRARYNAME).la
+endif
 LibName.A  := $(LibDir)/lib$(LIBRARYNAME).a
 LibName.O  := $(LibDir)/$(LIBRARYNAME).o
 LibName.BCA:= $(LibDir)/lib$(LIBRARYNAME).bca
-- 
cgit v1.2.3