From 5dabf01c339bd7a987de66af68fc9cf7e10cbfc4 Mon Sep 17 00:00:00 2001
From: "hyunghwan.chung" <hyunghwan.chung@c9d47f8d-4fed-4a2f-8cad-691f5fbe3904>
Date: Fri, 2 Feb 2018 14:53:00 +0000
Subject: [PATCH] added check for dl library

---
 moo/Makefile.in     |  1 +
 moo/configure       | 61 +++++++++++++++++++++++++++++++++++++++++++++
 moo/configure.ac    |  5 ++++
 moo/lib/Makefile.in |  1 +
 moo/mod/Makefile.in |  1 +
 5 files changed, 69 insertions(+)

diff --git a/moo/Makefile.in b/moo/Makefile.in
index bd72e81..4be54db 100644
--- a/moo/Makefile.in
+++ b/moo/Makefile.in
@@ -233,6 +233,7 @@ CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
 DLLTOOL = @DLLTOOL@
+DL_LIBS = @DL_LIBS@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
 DYNCALL_LIBS = @DYNCALL_LIBS@
diff --git a/moo/configure b/moo/configure
index b900941..88854ea 100755
--- a/moo/configure
+++ b/moo/configure
@@ -681,6 +681,7 @@ UNICOWS_LIBS
 SOCKET_LIBS
 TERMINAL_LIBS
 DYNCALL_LIBS
+DL_LIBS
 PTHREAD_CFLAGS
 PTHREAD_LIBS
 PTHREAD_CC
@@ -19690,6 +19691,66 @@ fi
 done
 
 
+save_LIBS="$LIBS"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+$as_echo_n "checking for library containing dlopen... " >&6; }
+if ${ac_cv_search_dlopen+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' dl dld; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_dlopen=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_dlopen+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_dlopen+:} false; then :
+
+else
+  ac_cv_search_dlopen=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
+$as_echo "$ac_cv_search_dlopen" >&6; }
+ac_res=$ac_cv_search_dlopen
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+  DL_LIBS="$ac_cv_search_dlopen"
+fi
+
+LIBS="$save_LIBS"
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dcNewCallVM in -ldyncall_s" >&5
 $as_echo_n "checking for dcNewCallVM in -ldyncall_s... " >&6; }
 if ${ac_cv_lib_dyncall_s_dcNewCallVM+:} false; then :
diff --git a/moo/configure.ac b/moo/configure.ac
index c3787b5..5974adb 100644
--- a/moo/configure.ac
+++ b/moo/configure.ac
@@ -176,6 +176,11 @@ AC_CHECK_FUNCS([snprintf _vsnprintf _vsnwprintf strerror_r])
 AC_CHECK_FUNCS([accept4])
 AC_CHECK_FUNCS([isatty])
 
+save_LIBS="$LIBS"
+AC_SEARCH_LIBS([dlopen], [dl dld], [DL_LIBS="$ac_cv_search_dlopen"])
+LIBS="$save_LIBS"
+AC_SUBST(DL_LIBS)
+
 AC_CHECK_LIB([dyncall_s], [dcNewCallVM], 
 	[
 		DYNCALL_LIBS="-ldyncall_s"
diff --git a/moo/lib/Makefile.in b/moo/lib/Makefile.in
index d94bdc5..21f61d1 100644
--- a/moo/lib/Makefile.in
+++ b/moo/lib/Makefile.in
@@ -274,6 +274,7 @@ CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
 DLLTOOL = @DLLTOOL@
+DL_LIBS = @DL_LIBS@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
 DYNCALL_LIBS = @DYNCALL_LIBS@
diff --git a/moo/mod/Makefile.in b/moo/mod/Makefile.in
index d12117b..d60b58f 100644
--- a/moo/mod/Makefile.in
+++ b/moo/mod/Makefile.in
@@ -300,6 +300,7 @@ CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
 DLLTOOL = @DLLTOOL@
+DL_LIBS = @DL_LIBS@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
 DYNCALL_LIBS = @DYNCALL_LIBS@