diff --git a/include/bx/platform.h b/include/bx/platform.h
index 96b9202..da3e3e0 100644
--- a/include/bx/platform.h
+++ b/include/bx/platform.h
@@ -54,7 +54,6 @@
 #define BX_PLATFORM_NX         0
 #define BX_PLATFORM_OSX        0
 #define BX_PLATFORM_PS4        0
-#define BX_PLATFORM_QNX        0
 #define BX_PLATFORM_RPI        0
 #define BX_PLATFORM_STEAMLINK  0
 #define BX_PLATFORM_WINDOWS    0
@@ -201,9 +200,6 @@
 #elif defined(__ORBIS__)
 #	undef  BX_PLATFORM_PS4
 #	define BX_PLATFORM_PS4 1
-#elif defined(__QNX__)
-#	undef  BX_PLATFORM_QNX
-#	define BX_PLATFORM_QNX 1
 #elif  defined(__FreeBSD__)        \
 	|| defined(__FreeBSD_kernel__) \
 	|| defined(__NetBSD__)         \
@@ -260,7 +256,6 @@
 		|| BX_PLATFORM_NX         \
 		|| BX_PLATFORM_OSX        \
 		|| BX_PLATFORM_PS4        \
-		|| BX_PLATFORM_QNX        \
 		|| BX_PLATFORM_RPI        \
 		|| BX_PLATFORM_STEAMLINK  \
 		)
@@ -275,7 +270,6 @@
 		|| BX_PLATFORM_NX         \
 		|| BX_PLATFORM_OSX        \
 		|| BX_PLATFORM_PS4        \
-		|| BX_PLATFORM_QNX        \
 		|| BX_PLATFORM_RPI        \
 		|| BX_PLATFORM_STEAMLINK  \
 		|| BX_PLATFORM_WINDOWS    \
@@ -335,8 +329,6 @@
 #	define BX_PLATFORM_NAME "OSX"
 #elif BX_PLATFORM_PS4
 #	define BX_PLATFORM_NAME "PlayStation 4"
-#elif BX_PLATFORM_QNX
-#	define BX_PLATFORM_NAME "QNX"
 #elif BX_PLATFORM_RPI
 #	define BX_PLATFORM_NAME "RaspberryPi"
 #elif BX_PLATFORM_STEAMLINK
diff --git a/scripts/toolchain.lua b/scripts/toolchain.lua
index 992457b..779c648 100644
--- a/scripts/toolchain.lua
+++ b/scripts/toolchain.lua
@@ -71,7 +71,6 @@ function toolchain(_buildDir, _libDir)
 			{ "netbsd",          "NetBSD"                     },
 			{ "osx",             "OSX"                        },
 			{ "orbis",           "Orbis"                      },
-			{ "qnx-arm",         "QNX/Blackberry - ARM"       },
 			{ "riscv",           "RISC-V"                     },
 			{ "rpi",             "RaspberryPi"                },
 		},
@@ -90,10 +89,6 @@ function toolchain(_buildDir, _libDir)
 			{ "vs2013-xp",     "Visual Studio 2013 targeting XP" },
 			{ "vs2015-xp",     "Visual Studio 2015 targeting XP" },
 			{ "vs2017-xp",     "Visual Studio 2017 targeting XP" },
-			{ "winphone8",     "Windows Phone 8.0"               },
-			{ "winphone81",    "Windows Phone 8.1"               },
-			{ "winstore81",    "Windows Store 8.1"               },
-			{ "winstore82",    "Universal Windows App 8.2"       },
 			{ "winstore100",   "Universal Windows App 10.0"      },
 			{ "durango",       "Durango"                         },
 			{ "orbis",         "Orbis"                           },
@@ -389,17 +384,6 @@ function toolchain(_buildDir, _libDir)
 			premake.gcc.ar  = orbisToolchain .. "ar"
 			location (path.join(_buildDir, "projects", _ACTION .. "-orbis"))
 
-		elseif "qnx-arm" == _OPTIONS["gcc"] then
-
-			if not os.getenv("QNX_HOST") then
-				print("Set QNX_HOST environment variable.")
-			end
-
-			premake.gcc.cc  = "$(QNX_HOST)/usr/bin/arm-unknown-nto-qnx8.0.0eabi-gcc"
-			premake.gcc.cxx = "$(QNX_HOST)/usr/bin/arm-unknown-nto-qnx8.0.0eabi-g++"
-			premake.gcc.ar  = "$(QNX_HOST)/usr/bin/arm-unknown-nto-qnx8.0.0eabi-ar"
-			location (path.join(_buildDir, "projects", _ACTION .. "-qnx-arm"))
-
 		elseif "rpi" == _OPTIONS["gcc"] then
 			location (path.join(_buildDir, "projects", _ACTION .. "-rpi"))
 
@@ -430,29 +414,6 @@ function toolchain(_buildDir, _libDir)
 			end
 			location (path.join(_buildDir, "projects", _ACTION .. "-clang"))
 
-		elseif "winphone8" == _OPTIONS["vs"] then
-			premake.vstudio.toolset = "v110_wp80"
-			location (path.join(_buildDir, "projects", _ACTION .. "-winphone8"))
-
-		elseif "winphone81" == _OPTIONS["vs"] then
-			premake.vstudio.toolset = "v120_wp81"
-			premake.vstudio.storeapp = "8.1"
-			platforms { "ARM" }
-			location (path.join(_buildDir, "projects", _ACTION .. "-winphone81"))
-
-		elseif "winstore81" == _OPTIONS["vs"] then
-			premake.vstudio.toolset = "v120"
-			premake.vstudio.storeapp = "8.1"
-			platforms { "ARM" }
-			location (path.join(_buildDir, "projects", _ACTION .. "-winstore81"))
-
-		elseif "winstore82" == _OPTIONS["vs"] then
-			premake.vstudio.toolset = "v140"
-			premake.vstudio.storeapp = "8.2"
-
-			platforms { "ARM" }
-			location (path.join(_buildDir, "projects", _ACTION .. "-winstore82"))
-
 		elseif "winstore100" == _OPTIONS["vs"] then
 			premake.vstudio.toolset = "v141"
 			premake.vstudio.storeapp = "10.0"
@@ -645,7 +606,7 @@ function toolchain(_buildDir, _libDir)
 		targetdir (path.join(_buildDir, "win64_" .. _ACTION .. "-clang/bin"))
 		objdir (path.join(_buildDir, "win64_" .. _ACTION .. "-clang/obj"))
 
-	configuration { "winphone* or winstore*" }
+	configuration { "winstore*" }
 		removeflags {
 			"StaticRuntime",
 			"NoExceptions",
@@ -1219,20 +1180,6 @@ function toolchain(_buildDir, _libDir)
 			"-std=c++11",
 		}
 
-	configuration { "qnx-arm" }
-		targetdir (path.join(_buildDir, "qnx-arm/bin"))
-		objdir (path.join(_buildDir, "qnx-arm/obj"))
-		libdirs { path.join(_libDir, "lib/qnx-arm") }
---		includedirs { path.join(bxDir, "include/compat/qnx") }
-		buildoptions {
-			"-Wno-psabi", -- note: the mangling of 'va_list' has changed in GCC 4.4.0
-			"-Wunused-value",
-			"-Wundef",
-		}
-		buildoptions_cpp {
-			"-std=c++11",
-		}
-
 	configuration { "rpi" }
 		targetdir (path.join(_buildDir, "rpi/bin"))
 		objdir (path.join(_buildDir, "rpi/obj"))
diff --git a/src/file.cpp b/src/file.cpp
index af74589..b6c0ea5 100644
--- a/src/file.cpp
+++ b/src/file.cpp
@@ -61,8 +61,7 @@ namespace bx
 	  || BX_PLATFORM_ANDROID \
 	  || BX_PLATFORM_BSD     \
 	  || BX_PLATFORM_IOS     \
-	  || BX_PLATFORM_OSX     \
-	  || BX_PLATFORM_QNX
+	  || BX_PLATFORM_OSX
 #		define fseeko64 fseeko
 #		define ftello64 ftello
 #	elif BX_PLATFORM_PS4