From a28f70d7fa11907898887706df35c3c3831d901a Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Tue, 10 May 2016 01:12:30 -0400
Subject: [PATCH] c3270: autolink libtinfo when it exists

The ncurses libs might split out core funcs into libtinfo.  Make sure we
detect & link this when available otherwise the linker might complain the
symbols are missing:
ld: screen.o: undefined reference to symbol 'meta'
/usr/lib64/libtinfo.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
---
 c3270/configure.in |  1 +
 c3270/configure    | 45 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/c3270/configure.in b/c3270/configure.in
index d9f19e6..8c6d852 100644
--- a/c3270/configure.in
+++ b/c3270/configure.in
@@ -129,6 +129,7 @@ dnl first, so that objects in them can be used by subsequent libraries.
 AC_SEARCH_LIBS(forkpty, util)
 AC_CHECK_FUNCS(forkpty)
 AC_CHECK_LIB(ncursesw, newterm, , [AC_CHECK_LIB(ncurses, newterm, , [AC_CHECK_LIB(curses, newterm, , [AC_MSG_ERROR(Can't find libncurses or new-enough libcurses)])])])
+AC_CHECK_LIB(tinfo, meta)
 if test "$with_readline" != no; then
 AC_CHECK_LIB(readline, rl_initialize)
 fi
diff --git a/c3270/configure b/c3270/configure
index bef2dff..9946e83 100755
--- a/c3270/configure
+++ b/c3270/configure
@@ -4020,6 +4020,51 @@ fi
 
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for meta in -ltinfo" >&5
+$as_echo_n "checking for meta in -ltinfo... " >&6; }
+if ${ac_cv_lib_tinfo_meta+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ltinfo  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$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 meta ();
+int
+main ()
+{
+return meta ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_tinfo_meta=yes
+else
+  ac_cv_lib_tinfo_meta=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_tinfo_meta" >&5
+$as_echo "$ac_cv_lib_tinfo_meta" >&6; }
+if test "x$ac_cv_lib_tinfo_meta" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBTINFO 1
+_ACEOF
+
+  LIBS="-ltinfo $LIBS"
+
+fi
+
 if test "$with_readline" != no; then
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for rl_initialize in -lreadline" >&5
 $as_echo_n "checking for rl_initialize in -lreadline... " >&6; }
-- 
2.7.4