Add libiberty library

Author: MrCirdo

configure.ac

@@ -561,6 +561,39 @@ case "$enable_unwind_ptrace" in
       ;;
 esac
 
+AC_ARG_ENABLE([libiberty],
+              [AS_HELP_STRING([--enable-libiberty],
+                              [enable libiberty support for demangling backtraces name @<:@default=check@:>@])],
+              [],
+              [enable_libiberty=check])
+
+
+case "$enable_libiberty" in
+   check)
+      enable_libiberty=yes
+      AC_CHECK_HEADERS([demangle.h], [], [
+         old_CFLAGS="$CFLAGS"
+         CFLAGS="$CFLAGS -I/usr/include/libiberty"
+         AC_CHECK_HEADERS([libiberty/demangle.h], [], [
+            enable_libiberty=no
+            CFLAGS="$old_CFLAGS"
+         ])
+      ])
+      ;;
+   no)
+      ;;
+   yes)
+      AC_CHECK_LIB([iberty], [cplus_demangle], [], [AC_MSG_ERROR([can not find required library libiberty])])
+      AC_CHECK_HEADERS([demangle.h], [], [
+         CFLAGS="$CFLAGS -I/usr/include/libiberty"
+         AC_CHECK_HEADERS([libiberty/demangle.h], [], [AC_MSG_ERROR([can not find required header file libiberty/demange.h])])
+      ])
+      ;;
+   *)
+      AC_MSG_ERROR([bad value '$enable_libiberty' for --enable-libiberty])
+      ;;
+esac
+
 AC_ARG_ENABLE([hwloc],
               [AS_HELP_STRING([--enable-hwloc],
               [enable hwloc support for CPU affinity; disables affinity support; requires libhwloc @<:@default=no@:>@])],
@@ -895,6 +928,7 @@ AC_MSG_RESULT([
   affinity:                  $enable_affinity
   unwind:                    $enable_unwind
   unwind-ptrace:             $enable_unwind_ptrace
+  libiberty:                 $enable_libiberty
   hwloc:                     $enable_hwloc
   debug:                     $enable_debug
   static:                    $enable_static