build fixes for FreeBSD-13.1

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()

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)

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;

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;