From 09106f661ff5b53bb46fde4cd8939cc38fd36c4a Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 1 Feb 2022 16:05:01 -0500
Subject: [PATCH] fix Termux build

---
 CMakeLists.txt | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9d27dc90..b0847dc2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,8 +14,10 @@ set(CMAKE_PROJECT_VERSION_PATCH 1)
 
 if (ANDROID)
   set(BUILD_GUI_DEFAULT OFF)
+  set(SYSTEM_SDL2_DEFAULT ON)
 else()
   set(BUILD_GUI_DEFAULT ON)
+  set(SYSTEM_SDL2_DEFAULT OFF)
 endif()
 
 find_package(PkgConfig)
@@ -31,7 +33,7 @@ option(WITH_JACK "Whether to build with JACK support. Auto-detects if JACK is av
 option(SYSTEM_FMT "Use a system-installed version of fmt instead of the vendored one" OFF)
 option(SYSTEM_LIBSNDFILE "Use a system-installed version of libsndfile instead of the vendored one" OFF)
 option(SYSTEM_ZLIB "Use a system-installed version of zlib instead of the vendored one" OFF)
-option(SYSTEM_SDL2 "Use a system-installed version of SDL2 instead of the vendored one" OFF)
+option(SYSTEM_SDL2 "Use a system-installed version of SDL2 instead of the vendored one" ${SYSTEM_SDL2_DEFAULT})
 option(WARNINGS_ARE_ERRORS "Whether warnings in furnace's C++ code should be treated as errors" OFF)
 
 set(DEPENDENCIES_INCLUDE_DIRS "")
@@ -42,6 +44,12 @@ set(DEPENDENCIES_LIBRARY_DIRS "")
 set(DEPENDENCIES_LINK_OPTIONS "")
 set(DEPENDENCIES_LEGACY_LDFLAGS "")
 
+if (BUILD_GUI)
+  set(SYSTEM_SDL_MIN_VER 2.0.18)
+else()
+  set(SYSTEM_SDL_MIN_VER 2.0.0)
+endif()
+
 find_package(Threads REQUIRED)
 list(APPEND DEPENDENCIES_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
 
@@ -114,7 +122,7 @@ endif()
 
 if (SYSTEM_SDL2)
   if (PKG_CONFIG_FOUND)
-    pkg_check_modules(SDL sdl>=2.0.18)
+    pkg_check_modules(SDL sdl>=${SYSTEM_SDL_MIN_VER})
     if (SDL_FOUND)
       list(APPEND DEPENDENCIES_INCLUDE_DIRS ${SDL_INCLUDE_DIRS})
       list(APPEND DEPENDENCIES_COMPILE_OPTIONS ${SDL_CFLAGS_OTHER})
@@ -125,13 +133,13 @@ if (SYSTEM_SDL2)
     endif()
   endif()
   if (NOT SDL_FOUND)
-    find_package(SDL 2.0.18)
+    find_package(SDL ${SYSTEM_SDL_MIN_VER})
     if (SDL_FOUND)
       list(APPEND DEPENDENCIES_INCLUDE_DIRS ${SDL_INCLUDE_DIR})
       list(APPEND DEPENDENCIES_LIBRARIES ${SDL_LIBRARY})
     else()
       if (PKG_CONFIG_FOUND)
-        pkg_check_modules(SDL2 sdl2>=2.0.18)
+        pkg_check_modules(SDL2 sdl2>=${SYSTEM_SDL_MIN_VER})
         if (SDL2_FOUND)
           list(APPEND DEPENDENCIES_INCLUDE_DIRS ${SDL2_INCLUDE_DIRS})
           list(APPEND DEPENDENCIES_COMPILE_OPTIONS ${SDL2_CFLAGS_OTHER})
@@ -142,7 +150,7 @@ if (SYSTEM_SDL2)
         endif()
       endif()
       if (NOT SDL2_FOUND)
-        find_package(SDL2 2.0.18 REQUIRED)
+        find_package(SDL2 ${SYSTEM_SDL_MIN_VER} REQUIRED)
         list(APPEND DEPENDENCIES_INCLUDE_DIRS ${SDL2_INCLUDE_DIR})
         list(APPEND DEPENDENCIES_LIBRARIES ${SDL2_LIBRARY})
       endif()