From 857a43c70a95efbb76b5d90e38e166cf802507a5 Mon Sep 17 00:00:00 2001
From: Chaoren Lin <chaorenl@google.com>
Date: Sat, 18 Jul 2015 01:09:43 +0000
Subject: [PATCH] Add evil hack to workaround the missing libdl.a in the
 Android toolchain.

Reviewers: vharron, ovyalov

Subscribers: tberghammer, danalbert, srhines, lldb-commits

Differential Revision: http://reviews.llvm.org/D11321

llvm-svn: 242599
---
 lldb/cmake/platforms/Android.cmake | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/lldb/cmake/platforms/Android.cmake b/lldb/cmake/platforms/Android.cmake
index df735612d8b9..b3a136156e34 100644
--- a/lldb/cmake/platforms/Android.cmake
+++ b/lldb/cmake/platforms/Android.cmake
@@ -119,6 +119,25 @@ endif()
 set( ANDROID_CXX_FLAGS    "${ANDROID_CXX_FLAGS} -fdata-sections -ffunction-sections" )
 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--gc-sections" )
 
+################# BEGIN EVIL HACK ##################
+# lldb-server links against libdl even though it's not being used and
+# libdl.a is currently missing from the toolchain (b.android.com/178517).
+# Therefore, in order to statically link lldb-server, we need a temporary
+# workaround. This creates a dummy libdl.a stub until the actual
+# libdl.a can be implemented in the toolchain.
+set( ANDROID_LIBDL_STUB "${CMAKE_BINARY_DIR}/libdl_stub" )
+file( MAKE_DIRECTORY ${ANDROID_LIBDL_STUB} )
+file( WRITE "${ANDROID_LIBDL_STUB}/libdl.c" "
+#include <dlfcn.h>
+void *       dlopen  (const char *filename, int flag)   { return 0; }
+const char * dlerror (void)                             { return 0; }
+void *       dlsym   (void *handle, const char *symbol) { return 0; }
+int          dlclose (void *handle)                     { return 0; }")
+execute_process( COMMAND ${CMAKE_C_COMPILER} -c ${ANDROID_LIBDL_STUB}/libdl.c -o ${ANDROID_LIBDL_STUB}/libdl.o )
+execute_process( COMMAND ${CMAKE_AR} rcs ${ANDROID_LIBDL_STUB}/libdl.a ${ANDROID_LIBDL_STUB}/libdl.o )
+set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -L${ANDROID_LIBDL_STUB}" )
+################# END EVIL HACK ##################
+
 # cache flags
 set( CMAKE_CXX_FLAGS           ""                        CACHE STRING "c++ flags" )
 set( CMAKE_C_FLAGS             ""                        CACHE STRING "c flags" )