diff --git a/source/build/include/build.h b/source/build/include/build.h
index 9bb875be1..301bc51bf 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -1092,7 +1092,6 @@ void    renderSetRollAngle(int32_t rolla);
 void tileInvalidate(int16_t tilenume, int32_t pal, int32_t how);
 
 void polymost_glreset(void);
-void polymost_precache(int32_t dapicnum, int32_t dapalnum, int32_t datype);
 void PrecacheHardwareTextures(int nTile);
 void Polymost_Startup();
 
@@ -1125,7 +1124,6 @@ EXTERN_CVAR(Bool, hw_useindexedcolortextures)
 EXTERN_CVAR(Bool, hw_parallaxskypanning)
 EXTERN_CVAR(Bool, r_voxels)
 
-extern int32_t r_parallaxskyclamping;
 extern int32_t r_downsize;
 extern int32_t mdtims, omdtims;
 extern int32_t glrendmode;
diff --git a/source/build/include/mdsprite.h b/source/build/include/mdsprite.h
index a6ab29fbd..454f953cc 100644
--- a/source/build/include/mdsprite.h
+++ b/source/build/include/mdsprite.h
@@ -199,7 +199,6 @@ struct voxmodel_t : public mdmodel_t
 
 EXTERN mdmodel_t **models;
 
-void updateanimation(md2model_t *m, tspriteptr_t tspr, uint8_t lpal);
 FTexture* mdloadskin(idmodel_t* m, int32_t number, int32_t pal, int32_t surf, bool* exact);
 void mdinit(void);
 void freeallmodels(void);
diff --git a/source/build/include/polymost.h b/source/build/include/polymost.h
index 4b5153abf..7ed08e9d9 100644
--- a/source/build/include/polymost.h
+++ b/source/build/include/polymost.h
@@ -14,12 +14,10 @@ typedef struct { float r, g, b, a; } coltypef;
 extern bool playing_rr;
 extern int32_t rendmode;
 extern float gtang;
-extern float glox1, gloy1;
+extern float glox1;
 extern double gxyaspect;
 extern float grhalfxdown10x;
 extern float gcosang, gsinang, gcosang2, gsinang2;
-extern float gchang, gshang, gctang, gstang;
-extern float gvrcorrection;
 
 extern void Polymost_prepare_loadboard(void);
 
@@ -40,9 +38,6 @@ void polymost_completeMirror();
 int32_t polymost_maskWallHasTranslucency(uwalltype const * const wall);
 int32_t polymost_spriteHasTranslucency(tspritetype const * const tspr);
 
-float* multiplyMatrix4f(float m0[4*4], const float m1[4*4]);
-
-void polymost_glinit(void);
 void polymost_glreset(void);
 
 enum {
@@ -117,14 +112,7 @@ enum {
 #define DAMETH_NARROW_MASKPROPS(dameth) (((dameth)&(~DAMETH_TRANS1))|(((dameth)&DAMETH_TRANS1)>>1))
 EDUKE32_STATIC_ASSERT(DAMETH_NARROW_MASKPROPS(DAMETH_MASKPROPS) == DAMETH_MASK);
 
-extern int32_t globalnoeffect;
-extern int32_t drawingskybox;
-extern int32_t hicprecaching;
 extern float fcosglobalang, fsinglobalang;
 extern float fxdim, fydim, fydimen, fviewingrange;
 
-extern char ptempbuf[MAXWALLSB<<1];
-
-extern hitdata_t polymost_hitdata;
-
 #endif
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index 84a413145..479328933 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -87,6 +87,21 @@ static FORCE_INLINE int32_t oldnonpow2(void)
 #endif
 }
 
+bool playing_rr;
+bool playing_blood;
+int32_t rendmode=0;
+int32_t glrendmode = REND_POLYMOST;
+int32_t r_scenebrightness = 0;
+int32_t r_rortexture = 0;
+int32_t r_rortexturerange = 0;
+int32_t r_rorphase = 0;
+int32_t mdtims, omdtims;
+uint8_t alphahackarray[MAXTILES];
+int32_t polymostcenterhoriz = 100;
+
+float fcosglobalang, fsinglobalang;
+float fxdim, fydim, fydimen, fviewingrange;
+
 uint8_t globalr = 255, globalg = 255, globalb = 255;
 
 int16_t pskybits_override = -1;
diff --git a/source/build/src/mdsprite.cpp b/source/build/src/mdsprite.cpp
index 5414a9ed9..470e9fe56 100644
--- a/source/build/src/mdsprite.cpp
+++ b/source/build/src/mdsprite.cpp
@@ -89,7 +89,7 @@ static int32_t tribufverts = 0;
 
 static mdmodel_t *mdload(const char *);
 static void mdfree(mdmodel_t *);
-int32_t globalnoeffect=0;
+static int32_t globalnoeffect=0;
 
 void freeallmodels()
 {
@@ -507,7 +507,7 @@ FTexture *mdloadskin(idmodel_t *m, int32_t number, int32_t pal, int32_t surf, bo
 }
 
 //Note: even though it says md2model, it works for both md2model&md3model
-void updateanimation(md2model_t *m, tspriteptr_t tspr, uint8_t lpal)
+static void updateanimation(md2model_t *m, tspriteptr_t tspr, uint8_t lpal)
 {
     if (m->numframes < 2)
     {
@@ -904,7 +904,7 @@ static md2model_t *md2load(FileReader & fil, const char *filnam)
 //---------------------------------------- MD2 LIBRARY ENDS ----------------------------------------
 
 // DICHOTOMIC RECURSIVE SORTING - USED BY MD3DRAW
-int32_t partition(uint16_t *indexes, float *depths, int32_t f, int32_t l)
+static int32_t partition(uint16_t *indexes, float *depths, int32_t f, int32_t l)
 {
     int32_t up = f, down = l;
     float piv = depths[f];
@@ -1842,7 +1842,7 @@ static void md3free(md3model_t *m)
 //---------------------------------------- MD3 LIBRARY ENDS ----------------------------------------
 //--------------------------------------- MD LIBRARY BEGINS  ---------------------------------------
 
-mdmodel_t *mdload(const char *filnam)
+static mdmodel_t *mdload(const char *filnam)
 {
     mdmodel_t *vm;
     int32_t i;
@@ -1905,7 +1905,7 @@ int32_t polymost_mddraw(tspriteptr_t tspr)
     return 0;
 }
 
-void mdfree(mdmodel_t *vm)
+static void mdfree(mdmodel_t *vm)
 {
     if (vm->mdnum == 1) { voxfree((voxmodel_t *)vm); return; }
     if (vm->mdnum == 2 || vm->mdnum == 3) { md3free((md3model_t *)vm); return; }
diff --git a/source/build/src/polymost.cpp b/source/build/src/polymost.cpp
index 1690ae282..7c98d5c96 100644
--- a/source/build/src/polymost.cpp
+++ b/source/build/src/polymost.cpp
@@ -63,18 +63,12 @@ CUSTOM_CVARD(Int, hw_anisotropy, 4, CVAR_ARCHIVE | CVAR_GLOBALCONFIG, "changes t
 // For testing - will be removed later.
 CVAR(Int, skytile, 0, 0)
 
-bool playing_rr;
-bool playing_blood;
-
-
-int32_t rendmode=0;
-
 typedef struct { float x, cy[2], fy[2]; int32_t tag; int16_t n, p, ctag, ftag; } vsptyp;
 #define VSPMAX 2048 //<- careful!
 static vsptyp vsp[VSPMAX];
 static int32_t gtag, viewportNodeCount;
 static float xbl, xbr, xbt, xbb;
-int32_t domost_rejectcount;
+static int32_t domost_rejectcount;
 #ifdef YAX_ENABLE
 typedef struct { float x, cy[2]; int32_t tag; int16_t n, p, ctag; } yax_vsptyp;
 static yax_vsptyp yax_vsp[YAX_MAXBUNCHES*2][VSPMAX];
@@ -92,8 +86,7 @@ static float dxb1[MAXWALLSB], dxb2[MAXWALLSB];
 
 #define SOFTROTMAT 0
 
-int32_t r_pogoDebug = 0;
-int32_t polymostcenterhoriz = 100;
+static int32_t r_pogoDebug = 0;
 
 static float gviewxrange;
 static float ghoriz, ghoriz2;
@@ -103,16 +96,13 @@ float gyxscale, ghalfx, grhalfxdown10, grhalfxdown10x, ghalfy;
 float gcosang, gsinang, gcosang2, gsinang2;
 float gtang = 0.f;
 
-float gchang = 0, gshang = 0, gctang = 0, gstang = 0;
-float gvrcorrection = 1.f;
+static float gchang = 0, gshang = 0, gctang = 0, gstang = 0;
+static float gvrcorrection = 1.f;
 
 static vec3d_t xtex, ytex, otex, xtex2, ytex2, otex2;
 
-float fcosglobalang, fsinglobalang;
-float fxdim, fydim, fydimen, fviewingrange;
-
-float fsearchx, fsearchy, fsearchz;
-int psectnum, pwallnum, pbottomwall, pisbottomwall, psearchstat;
+static float fsearchx, fsearchy, fsearchz;
+static int psectnum, pwallnum, pbottomwall, pisbottomwall, psearchstat;
 
 static int32_t drawpoly_srepeat = 0, drawpoly_trepeat = 0;
 #define MAX_DRAWPOLY_VERTS 8
@@ -120,23 +110,16 @@ static int32_t drawpoly_srepeat = 0, drawpoly_trepeat = 0;
 static int32_t lastglpolygonmode = 0; //FUK
 
 static FHardwareTexture *polymosttext = 0;
-int32_t glrendmode = REND_POLYMOST;
 
-int32_t r_scenebrightness = 0;
-
-int32_t r_rortexture = 0;
-int32_t r_rortexturerange = 0;
-int32_t r_rorphase = 0;
-
-int32_t r_yshearing = 0;
+static int32_t r_yshearing = 0;
 
 // used for fogcalc
 static float fogresult, fogresult2;
 
-char ptempbuf[MAXWALLSB<<1];
+static char ptempbuf[MAXWALLSB<<1];
 
 // polymost ART sky control
-int32_t r_parallaxskyclamping = 1;
+static int32_t r_parallaxskyclamping = 1;
 
 #define MIN_CACHETIME_PRINT 10
 
@@ -144,12 +127,10 @@ int32_t r_parallaxskyclamping = 1;
 
 #define Bfabsf fabsf
 
-int32_t mdtims, omdtims;
-uint8_t alphahackarray[MAXTILES];
-int32_t drawingskybox = 0;
-int32_t hicprecaching = 0;
+static int32_t drawingskybox = 0;
+static int32_t hicprecaching = 0;
 
-hitdata_t polymost_hitdata;
+static hitdata_t polymost_hitdata;
 
 void polymost_outputGLDebugMessage(uint8_t severity, const char* format, ...)
 {
@@ -172,13 +153,14 @@ void gltexapplyprops(void)
 
 //--------------------------------------------------------------------------------------------------
 
-float glox1, gloy1, glox2, gloy2, gloyxscale, gloxyaspect, glohoriz2, glohorizcorrect, glotang;
+float glox1;
+static float gloy1, glox2, gloy2, gloyxscale, gloxyaspect, glohoriz2, glohorizcorrect, glotang;
 
 //Use this for both initialization and uninitialization of OpenGL.
 static int32_t gltexcacnum = -1;
 
 //in-place multiply m0=m0*m1
-float* multiplyMatrix4f(float m0[4*4], const float m1[4*4])
+static float* multiplyMatrix4f(float m0[4*4], const float m1[4*4])
 {
     float mR[4*4];
 
@@ -242,7 +224,7 @@ void polymost_glreset()
 FileReader GetBaseResource(const char* fn);
 
 // one-time initialization of OpenGL for polymost
-void polymost_glinit()
+static void polymost_glinit()
 {
 	for (int basepalnum = 0; basepalnum < MAXBASEPALS; ++basepalnum)
     {
@@ -1831,7 +1813,7 @@ static inline int polymost_getclosestpointonwall(vec2_t const * const pos, int32
     return 0;
 }
 
-float fgetceilzofslope(usectorptr_t sec, float dax, float day)
+static float fgetceilzofslope(usectorptr_t sec, float dax, float day)
 {
     if (!(sec->ceilingstat&2))
         return float(sec->ceilingz);
@@ -1849,7 +1831,7 @@ float fgetceilzofslope(usectorptr_t sec, float dax, float day)
     return float(sec->ceilingz) + (sec->ceilingheinum*j)/i;
 }
 
-float fgetflorzofslope(usectorptr_t sec, float dax, float day)
+static float fgetflorzofslope(usectorptr_t sec, float dax, float day)
 {
     if (!(sec->floorstat&2))
         return float(sec->floorz);
@@ -1867,7 +1849,7 @@ float fgetflorzofslope(usectorptr_t sec, float dax, float day)
     return float(sec->floorz) + (sec->floorheinum*j)/i;
 }
 
-void fgetzsofslope(usectorptr_t sec, float dax, float day, float* ceilz, float *florz)
+static void fgetzsofslope(usectorptr_t sec, float dax, float day, float* ceilz, float *florz)
 {
     *ceilz = float(sec->ceilingz); *florz = float(sec->floorz);
 
@@ -3741,7 +3723,7 @@ typedef struct
     int8_t filler;
 } wallspriteinfo_t;
 
-wallspriteinfo_t wsprinfo[MAXSPRITES];
+static wallspriteinfo_t wsprinfo[MAXSPRITES];
 
 void Polymost_prepare_loadboard(void)
 {
@@ -3774,7 +3756,7 @@ static inline int32_t polymost_findwall(tspritetype const * const tspr, vec2_t c
     return closest;
 }
 
-int32_t polymost_lintersect(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
+static int32_t polymost_lintersect(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
                             int32_t x3, int32_t y3, int32_t x4, int32_t y4)
 {
     // p1 to p2 is a line segment
@@ -4626,7 +4608,7 @@ void polymost_initosdfuncs(void)
 {
 }
 
-void polymost_precache(int32_t dapicnum, int32_t dapalnum, int32_t datype)
+static void polymost_precache(int32_t dapicnum, int32_t dapalnum, int32_t datype)
 {
     // dapicnum and dapalnum are like you'd expect
     // datype is 0 for a wall/floor/ceiling and 1 for a sprite
diff --git a/source/build/src/voxmodel.cpp b/source/build/src/voxmodel.cpp
index 33483ca9b..827a14673 100644
--- a/source/build/src/voxmodel.cpp
+++ b/source/build/src/voxmodel.cpp
@@ -35,7 +35,7 @@ static voxmodel_t *gvox;
 
 
 //pitch must equal xsiz*4
-FHardwareTexture *gloadtex(const int32_t *picbuf, int32_t xsiz, int32_t ysiz, int32_t is8bit, int32_t dapal)
+static FHardwareTexture *gloadtex(const int32_t *picbuf, int32_t xsiz, int32_t ysiz, int32_t is8bit, int32_t dapal)
 {
     // Correct for GL's RGB order; also apply gamma here:
     const coltype *const pic = (const coltype *)picbuf;
diff --git a/source/common/searchpaths.cpp b/source/common/searchpaths.cpp
index 56b1b8c09..2e24a76f4 100644
--- a/source/common/searchpaths.cpp
+++ b/source/common/searchpaths.cpp
@@ -162,7 +162,7 @@ void CollectSubdirectories(TArray<FString> &searchpath, const char *dirmatch)
 	{
 		findstate_t findstate;
 		void* handle;
-		if ((handle = I_FindFirst(AbsPath + "/*.*", &findstate)) != (void*)-1)
+		if ((handle = I_FindFirst(AbsPath + "/*", &findstate)) != (void*)-1)
 		{
 			do
 			{
diff --git a/source/platform/posix/cocoa/i_system.mm b/source/platform/posix/cocoa/i_system.mm
index 3fa59cf37..9038893a0 100644
--- a/source/platform/posix/cocoa/i_system.mm
+++ b/source/platform/posix/cocoa/i_system.mm
@@ -180,6 +180,7 @@ void* I_FindFirst(const char* const filespec, findstate_t* const fileinfo)
 	{
 		pattern = slash+1;
 		dir = FString(filespec, slash - filespec + 1);
+		fileinfo->path = dir;
 	}
 	else
 	{
@@ -234,7 +235,7 @@ int I_FindAttr(findstate_t* const fileinfo)
 	dirent* const ent = fileinfo->namelist[fileinfo->current];
 	bool isdir;
 
-	if (DirEntryExists(ent->d_name, &isdir))
+	if (DirEntryExists(fileinfo->path + ent->d_name, &isdir))
 	{
 		return isdir ? FA_DIREC : 0;
 	}
diff --git a/source/platform/posix/i_system.h b/source/platform/posix/i_system.h
index 48c365af2..21b5c0f6b 100644
--- a/source/platform/posix/i_system.h
+++ b/source/platform/posix/i_system.h
@@ -73,9 +73,10 @@ bool I_SetCursor(FTexture *);
 struct findstate_t
 {
 private:
-    int count;
+	FString path;
     struct dirent **namelist;
     int current;
+	int count;
 
 	friend void *I_FindFirst(const char *filespec, findstate_t *fileinfo);
 	friend int I_FindNext(void *handle, findstate_t *fileinfo);
diff --git a/source/platform/posix/sdl/i_system.cpp b/source/platform/posix/sdl/i_system.cpp
index 7dd138ea2..60d4aa005 100644
--- a/source/platform/posix/sdl/i_system.cpp
+++ b/source/platform/posix/sdl/i_system.cpp
@@ -304,6 +304,7 @@ void *I_FindFirst (const char *filespec, findstate_t *fileinfo)
 	{
 		pattern = slash+1;
 		dir = FString(filespec, slash-filespec+1);
+		fileinfo->path = dir;
 	}
 	else
 	{
@@ -350,7 +351,7 @@ int I_FindAttr(findstate_t* const fileinfo)
 	dirent* const ent = fileinfo->namelist[fileinfo->current];
 	bool isdir;
 
-	if (DirEntryExists(ent->d_name, &isdir))
+	if (DirEntryExists(fileinfo->path + ent->d_name, &isdir))
 	{
 		return isdir ? FA_DIREC : 0;
 	}