# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1606418104 -3600
# Node ID 29b2448f219100697eea2c88d83c1cadcd2ac13a
# Parent  4007526cb1ed619c8d566db0b7882fc54cd9030f
patch 8.2.2056: configure fails when building with implicit-function-declaration

Commit: https://github.com/vim/vim/commit/ce7be3a0e6f19bc85990bb8fcfe5e208944777b4
Author: Bram Moolenaar <Bram@vim.org>
Date:   Thu Nov 26 20:11:11 2020 +0100

    patch 8.2.2056: configure fails when building with implicit-function-declaration

    Problem:    Configure fails when building with the
                "implicit-function-declaration" error enabled, specifically on Mac.
    Solution:   Declear the functions like in the source code. (suggestion by
                Clemens Lang, closes #7380)

diff --git a/src/auto/configure b/src/auto/configure
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -12350,10 +12350,18 @@ if test -c /dev/ptmx ; then
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
-int
-main ()
-{
-ptsname(0);grantpt(0);unlockpt(0);
+// These should be in stdlib.h, but it depends on _XOPEN_SOURCE.
+char *ptsname(int);
+int unlockpt(int);
+int grantpt(int);
+
+int
+main ()
+{
+
+		ptsname(0);
+		grantpt(0);
+		unlockpt(0);
   ;
   return 0;
 }
diff --git a/src/configure.ac b/src/configure.ac
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -3593,7 +3593,15 @@ fi
 
 AC_MSG_CHECKING(for SVR4 ptys)
 if test -c /dev/ptmx ; then
-  AC_TRY_LINK([], [ptsname(0);grantpt(0);unlockpt(0);],
+  AC_TRY_LINK([
+// These should be in stdlib.h, but it depends on _XOPEN_SOURCE.
+char *ptsname(int);
+int unlockpt(int);
+int grantpt(int);
+	       ], [
+		ptsname(0);
+		grantpt(0);
+		unlockpt(0);],
 	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SVR4_PTYS),
 	AC_MSG_RESULT(no))
 else
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2056,
+/**/
     2055,
 /**/
     2054,