SDL_mixer: cmake+autotools: fix prefix of sdl2_ttf-config.cmake

SDL Commits
1 
From 84313f1cc1bfa8491f1ddb3450b9f87144698c2d Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Mon, 28 Aug 2023 18:25:34 +0200
Subject: [PATCH] cmake+autotools: fix prefix of sdl2_ttf-config.cmake

There was an issue when /usr/lib64 was symlinked into e.g. /lib and cmake was configured
with -DCMAKE_PREFIX_PATH=/
---
 sdl2_mixer-config.cmake.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sdl2_mixer-config.cmake.in b/sdl2_mixer-config.cmake.in
index a2eaf7e5..5dae59e3 100644
--- a/sdl2_mixer-config.cmake.in
+++ b/sdl2_mixer-config.cmake.in
@@ -70,6 +70,7 @@ set(SDL2MIXER_WAVPACK               @SDL2MIXER_WAVPACK@)
 
 set(SDL2MIXER_SDL2_REQUIRED_VERSION @SDL_VERSION@)
 
+get_filename_component(CMAKE_CURRENT_LIST_DIR ${CMAKE_CURRENT_LIST_DIR} REALPATH)
 get_filename_component(prefix "${CMAKE_CURRENT_LIST_DIR}/@cmake_prefix_relpath@" ABSOLUTE)
 set(exec_prefix "@exec_prefix@")
 set(bindir "@bindir@")