From af1ef76c70159fdb2242466886c80c2f914bacf9 Mon Sep 17 00:00:00 2001
From: oxmox <oxmox@noreply.localhost>
Date: Sat, 11 Mar 2023 12:14:56 +0100
Subject: [PATCH] build fixes for FreeBSD-13.1

---
 CMakeLists.txt                     |  2 +-
 external/CMakeLists.txt            | 10 +++++++++-
 src/doompanning.cc                 |  6 ++++++
 src/dp_doom/linuxdoom-1.10/i_net.c |  4 ++++
 4 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 32a0317..83a4125 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,7 @@ if (NOT DOOMPANNING_INTERNAL_SDL)
     find_package(SDL2 2.0.17)
 endif()
 
-find_file(DOOM1_WAD doom1.wad HINTS /usr/share/games/doom)
+find_file(DOOM1_WAD doom1.wad HINTS /usr/share/games/doom /usr/local/share/doom)
 if (DOOM1_WAD)
     file(CREATE_LINK ${DOOM1_WAD} doom1.wad COPY_ON_ERROR SYMBOLIC)
 else()
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 9f975cc..f999d3a 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -20,4 +20,12 @@ add_library(imgui OBJECT
 )
 
 target_include_directories(imgui PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/imgui)
-target_link_libraries(imgui PUBLIC SDL2::SDL2-static)
+
+find_file(XLIB_HEADER Xlib.h PATH_SUFFIXES X11)
+if (XLIB_HEADER)
+    message(">> XLIB_HEADER found: ${XLIB_HEADER}")
+    get_filename_component(XLIB_INCLUDE_DIR ${XLIB_HEADER} DIRECTORY)
+    target_include_directories(imgui SYSTEM PUBLIC ${XLIB_INCLUDE_DIR}/../)
+endif()
+
+target_link_libraries(imgui PUBLIC SDL2::SDL2)
diff --git a/src/doompanning.cc b/src/doompanning.cc
index 640cfe5..df3b191 100644
--- a/src/doompanning.cc
+++ b/src/doompanning.cc
@@ -108,6 +108,12 @@ struct ControllerActions
 
 #define DOOM_EXECUTABLE "dp_doom"
 
+#if defined(__FREEBSD__)
+extern char **environ;
+char **__environ = environ;
+#endif
+
+
 void spawn_doom_posix_spawn(ControllerContext &ctx)
 {
     (void) ctx;
diff --git a/src/dp_doom/linuxdoom-1.10/i_net.c b/src/dp_doom/linuxdoom-1.10/i_net.c
index 863c916..dc1ee54 100644
--- a/src/dp_doom/linuxdoom-1.10/i_net.c
+++ b/src/dp_doom/linuxdoom-1.10/i_net.c
@@ -81,6 +81,10 @@ boolean NetListen (void);
 // NETWORKING
 //
 
+#ifndef IPPORT_USERRESERVED
+#define IPPORT_USERRESERVED 5000
+#endif
+
 int	DOOMPORT =	(IPPORT_USERRESERVED +0x1d );
 
 int			sendsocket;