fix sdl2_compat build

setup/multiplayer.c

@@ -16,6 +16,7 @@
 
 #include <stdint.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "d_iwad.h"
 #include "doomdef.h"
@@ -506,7 +507,7 @@
          ++num_iwads;
     }
 
     iwad_labels = malloc(sizeof(*iwad_labels) * num_iwads);
 
     for (i=0; i < num_iwads; ++i)
     {

src/i_endoom.c

@@ -15,6 +15,8 @@
 //    Exit text-mode ENDOOM screen.
 //
 
+#include <string.h>
+
 #include "doomtype.h"
 #include "i_printf.h"
 #include "i_video.h"

src/i_flickstick.c

@@ -25,10 +25,12 @@
 //
 //----------------------------------------------------------------------------
 
-#include "g_game.h"
+#include <math.h>
+#include <string.h>
+
 #include "i_flickstick.h"
+#include "doomstat.h"
 #include "i_gamepad.h"
-#include "i_input.h"
 #include "m_config.h"
 
 #define MAX_F 0.999999f

src/i_gamepad.c

@@ -17,6 +17,7 @@
 #include "SDL.h"
 
 #include <math.h>
+#include <string.h>
 
 #include "g_game.h"
 #include "i_flickstick.h"

src/i_input.c

@@ -17,6 +17,8 @@
 
 #include "SDL.h"
 
+#include <string.h>
+
 #include "d_event.h"
 #include "d_main.h"
 #include "doomkeys.h"

src/i_pcsound.c

@@ -19,6 +19,8 @@
 #include "al.h"
 #include "alext.h"
 
+#include <string.h>
+
 #include "doomstat.h"
 #include "doomtype.h"
 #include "i_oalcommon.h"

src/i_rumble.c

@@ -28,7 +28,6 @@
 #include "m_config.h"
 #include "p_mobj.h"
 #include "sounds.h"
-#include "w_wad.h"
 
 #define MAX_RUMBLE_COUNT 4
 #define MAX_RUMBLE_SDL   0xFFFF

src/i_video.c

@@ -26,6 +26,7 @@
 #include "SDL.h"
 
 #include <limits.h>
+#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 

src/mn_setup.c

@@ -13,6 +13,9 @@
 //  GNU General Public License for more details.
 //
 
+#include <ctype.h>
+#include <math.h>
+#include <stdio.h>
 #include <string.h>
 
 #include "hu_command.h"

src/st_stuff.c

@@ -20,6 +20,7 @@
 //
 //-----------------------------------------------------------------------------
 
+#include <math.h>
 #include <stdlib.h>
 
 #include "am_map.h"

textscreen/txt_fileselect.c

@@ -15,6 +15,7 @@
 // Routines for selecting files.
 //
 
+#include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>