$NetBSD: patch-configure,v 1.1 2025/02/17 22:00:48 nia Exp $

[PATCH] Remove bashism in configure.ac

Patch courtesy of Jakub Bogusz.

https://github.com/cacalabs/libcaca/commit/9a0ebef8d7d78bd32737ba45afc28d260fd1616b.patch

--- configure.orig	2025-02-17 20:32:40.574425308 +0000
+++ configure
@@ -19422,7 +19422,6 @@ fi
 done
   CFLAGS="$save_CFLAGS"
   if test "${ac_cv_my_have_cocoa}" = "yes"; then
-    [[ "$target_os" =~ [0-9]+ ]] && darwin_ver="${BASH_REMATCH[0]}"
     case x${target} in
     xpowerpc*darwin*)
       # 10.3 needed to link with X11
@@ -19450,6 +19449,7 @@ done
     esac
     CC="${CC:-gcc-${GCC_VERSION}}"
     CXX="${CXX:-g++-${GCC_VERSION}}"
+    darwin_ver="$(echo "${target_os}" | sed -ne 's/[^0-9]*\([0-9]\+\).*/\1/p')"
     if [ "$darwin_ver" -lt "13" ]; then
       MACOSX_SDK_FRAMEWORKS="${MACOSX_SDK_FRAMEWORKS:--F${MACOSX_SDK}/System/Library/Frameworks}"
       CPPFLAGS="${CPPFLAGS} ${ARCH} ${MACOSX_SDK_FRAMEWORKS}"