From 4f67db33f4887224d19e977187fb331e1b8ad9ff Mon Sep 17 00:00:00 2001
From: Kamil Rytarowski <n54@gmx.com>
Date: Sun, 29 Sep 2019 18:03:07 +0200
Subject: [PATCH 1/4] Avoids picking hidden internal gethostbyname_r from libc

Fixes NetBSD support.
---
 unix/tcl.m4 | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 7b62044da..aaba8d75e 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -2586,7 +2586,20 @@ AC_DEFUN([SC_TCL_GETHOSTBYADDR_R], [AC_CHECK_FUNC(gethostbyaddr_r, [
 #
 #--------------------------------------------------------------------
 
-AC_DEFUN([SC_TCL_GETHOSTBYNAME_R], [AC_CHECK_FUNC(gethostbyname_r, [
+AC_DEFUN([SC_TCL_GETHOSTBYNAME_R], [
+    # Avoids picking hidden internal symbol from libc
+    SC_TCL_GETHOSTBYNAME_R_DECL
+
+    if test "$tcl_cv_api_gethostbyname_r" = yes; then
+	SC_TCL_GETHOSTBYNAME_R_TYPE
+    fi
+])
+
+AC_DEFUN([SC_TCL_GETHOSTBYNAME_R_DECL], [AC_CHECK_DECLS(gethostbyname_r, [
+    tcl_cv_api_gethostbyname_r=yes],[tcl_cv_api_gethostbyname_r=no],[#include <netdb.h>])
+])
+
+AC_DEFUN([SC_TCL_GETHOSTBYNAME_R_TYPE], [AC_CHECK_FUNC(gethostbyname_r, [
     AC_CACHE_CHECK([for gethostbyname_r with 6 args], tcl_cv_api_gethostbyname_r_6, [
     AC_TRY_COMPILE([
 	#include <netdb.h>
-- 
2.21.0