SDL: autotools: Add check for libdecor get min/max functions

SDL Commits
1 
From 44dc90dcc84767867bc7f4438b8747eebd7ff185 Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Wed, 18 Jan 2023 13:03:04 -0500
Subject: [PATCH] autotools: Add check for libdecor get min/max functions

---
 configure.ac            | 8 ++++++++
 include/SDL_config.h.in | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/configure.ac b/configure.ac
index d815a168a2fa..a4fe1ae6611e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1787,6 +1787,14 @@ dnl See if libdecor is available
                     else
                         EXTRA_LDFLAGS="$EXTRA_LDFLAGS $DECOR_LIBS"
                     fi
+
+                    saved_cflags=$CFLAGS
+                    CFLAGS="$CFLAGS $DECOR_CFLAGS"
+                    AC_CHECK_DECLS([libdecor_frame_get_min_content_size, libdecor_frame_get_max_content_size], [libdecor_get_min_max=yes], [ ], [[#include <libdecor.h>]])
+                    if test x$libdecor_get_min_max = xyes; then
+                        AC_DEFINE(SDL_HAVE_LIBDECOR_GET_MIN_MAX, 1, [ ])
+                    fi
+                    CFLAGS="$saved_cflags"
                 fi
             fi
         fi
diff --git a/include/SDL_config.h.in b/include/SDL_config.h.in
index 5dc98a337771..d6460b783e17 100644
--- a/include/SDL_config.h.in
+++ b/include/SDL_config.h.in
@@ -491,4 +491,7 @@
 /* Enable dynamic libsamplerate support */
 #undef SDL_LIBSAMPLERATE_DYNAMIC
 
+/* Libdecor get min/max content size functions */
+#undef SDL_HAVE_LIBDECOR_GET_MIN_MAX
+
 #endif /* SDL_config_h_ */