Commit: patch 9.1.1671: configure: missing comment about AC_CONFIG_SRCDIR

[Christian Brabandt]

patch 9.1.1671: configure: missing comment about AC_CONFIG_SRCDIR

Commit: https://github.com/vim/vim/commit/6a37035bf2482d4950e14bd650f9064ab24c44c3
Author: Damien Lejay <dam...@lejay.be>
Date: Sat Aug 23 06:43:27 2025 -0400

patch 9.1.1671: configure: missing comment about AC_CONFIG_SRCDIR

Problem: configure: missing comment about AC_CONFIG_SRCDIR
Solution: Add comment explaining the use of AC_CONFIG_SRCDIR
(Damien Lejay)

closes: #18071

Signed-off-by: Damien Lejay <dam...@lejay.be>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/auto/configure b/src/auto/configure
index 8b559f557..5c0d3d614 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -2968,6 +2968,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu



+
ac_config_headers="$ac_config_headers auto/config.h:config.h.in"


diff --git a/src/configure.ac b/src/configure.ac
index 0cfe836ac..983c58224 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -30,6 +30,10 @@ dnl truth for both UNIX and non-UNIX platforms.
dnl
dnl Therefore we call AC_INIT without arguments.
AC_INIT
+
+dnl Use vim.h as the source-tree anchor: AC_CONFIG_SRCDIR verifies that
+dnl configure is run in (or pointed to) the correct source directory.
+dnl vim.h is always present at the top level.
AC_CONFIG_SRCDIR([vim.h])
AC_CONFIG_HEADERS(auto/config.h:config.h.in)

diff --git a/src/version.c b/src/version.c
index 42949896a..4525356fb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -724,6 +724,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1671,
/**/
1670,
/**/