Fix LLDB Android AArch64 GCC debug info build

Committing after fixing suggested changes and tested release/debug builds on 
x86_64-linux and arm/aarch64 builds.

Differential revision: https://reviews.llvm.org/D29042



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293850 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/config-ix.cmake

@@ -227,6 +227,7 @@ if( HAVE_DLFCN_H )
     list(APPEND CMAKE_REQUIRED_LIBRARIES dl)
   endif()
   check_symbol_exists(dlopen dlfcn.h HAVE_DLOPEN)
+  check_symbol_exists(dladdr dlfcn.h HAVE_DLADDR)
   if( HAVE_LIBDL )
     list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES dl)
   endif()

include/llvm/Config/config.h.cmake

@@ -51,6 +51,9 @@
 /* Define if dlopen() is available on this platform. */
 #cmakedefine HAVE_DLOPEN ${HAVE_DLOPEN}
 
+/* Define if dladdr() is available on this platform. */
+#cmakedefine HAVE_DLADDR ${HAVE_DLADDR}
+
 /* Define to 1 if you have the <errno.h> header file. */
 #cmakedefine HAVE_ERRNO_H ${HAVE_ERRNO_H}
 

lib/Support/Unix/Path.inc

@@ -180,7 +180,7 @@ std::string getMainExecutable(const char *argv0, void *MainAddr) {
       if (getprogpath(exe_path, argv0))
         return exe_path;
   }
-#elif defined(HAVE_DLFCN_H)
+#elif defined(HAVE_DLFCN_H) && defined(HAVE_DLADDR)
   // Use dladdr to get executable path if available.
   Dl_info DLInfo;
   int err = dladdr(MainAddr, &DLInfo);

lib/Support/Unix/Signals.inc

@@ -412,7 +412,7 @@ void llvm::sys::PrintStackTrace(raw_ostream &OS) {
 
   if (printSymbolizedStackTrace(Argv0, StackTrace, depth, OS))
     return;
-#if HAVE_DLFCN_H && __GNUG__ && !defined(__CYGWIN__)
+#if HAVE_DLFCN_H && HAVE_DLADDR
   int width = 0;
   for (int i = 0; i < depth; ++i) {
     Dl_info dlinfo;