diff --git a/desktop/api.cpp b/desktop/api.cpp
index 9db645c..b57eac2 100644
--- a/desktop/api.cpp
+++ b/desktop/api.cpp
@@ -3,9 +3,7 @@
 // Written by: nakst.
 
 #define ES_API
-#define ES_FORWARD(x) x
-#define ES_EXTERN_FORWARD extern "C"
-#define ES_DIRECT_API
+#define ES_FORWARD
 #include <essence.h>
 
 #ifdef USE_STB_IMAGE
@@ -1475,10 +1473,10 @@ extern "C" void _start(EsProcessStartupInformation *_startupInformation) {
 	ThreadLocalStorage threadLocalStorage;
 
 	api.startupInformation = _startupInformation;
-	bool desktop = api.startupInformation->isDesktop;
+	bool isDesktop = api.startupInformation->isDesktop;
 	
 #ifndef NO_API_TABLE
-	if (desktop) {
+	if (isDesktop) {
 		// Initialise the API table.
 
 		EsAssert(sizeof(apiTable) <= 0xF000); // API table is too large.
@@ -1495,12 +1493,11 @@ extern "C" void _start(EsProcessStartupInformation *_startupInformation) {
 		EsMessageMutexAcquire();
 
 		api.global = (GlobalData *) EsMemoryMapObject(api.startupInformation->globalDataRegion, 
-				0, sizeof(GlobalData), desktop ? ES_MEMORY_MAP_OBJECT_READ_WRITE : ES_MEMORY_MAP_OBJECT_READ_ONLY);
+				0, sizeof(GlobalData), isDesktop ? ES_MEMORY_MAP_OBJECT_READ_WRITE : ES_MEMORY_MAP_OBJECT_READ_ONLY);
+		theming.scale = api.global->uiScale; // We'll receive ES_MSG_UI_SCALE_CHANGED when this changes.
 	}
 
-	bool uiProcess = true; // TODO Determine this properly.
-
-	if (desktop) {
+	if (isDesktop) {
 		EsPrint("Reached Desktop process.\n");
 
 #ifdef PROFILE_DESKTOP_FUNCTIONS
@@ -1533,6 +1530,10 @@ extern "C" void _start(EsProcessStartupInformation *_startupInformation) {
 		SettingsLoadDefaults();
 		SettingsUpdateGlobalAndWindowManager();
 		SettingsWindowColorUpdated();
+
+		ThemeInitialise();
+
+		DesktopEntry(); 
 	} else {
 		EsBuffer buffer = {};
 		buffer.bytes = EsConstantBufferGetSize(api.startupInformation->data.systemData);
@@ -1561,15 +1562,7 @@ extern "C" void _start(EsProcessStartupInformation *_startupInformation) {
 		MessageDesktop(&m, 1, ES_INVALID_HANDLE, &responseBuffer);
 		SystemConfigurationLoad((char *) responseBuffer.out, responseBuffer.bytes);
 		EsHeapFree(responseBuffer.out);
-	}
 
-	if (uiProcess) {
-		EsAssert(ThemeInitialise());
-	}
-
-	if (desktop) {
-		DesktopEntry(); 
-	} else {
 		((StartFunction) api.startupInformation->applicationStartAddress)();
 	}
 
diff --git a/desktop/desktop.cpp b/desktop/desktop.cpp
index 37749c4..a443649 100644
--- a/desktop/desktop.cpp
+++ b/desktop/desktop.cpp
@@ -8,13 +8,11 @@
 // 	- Duplicate tabs.
 
 // TODO Graphical issues:
-// 	- Closing tabs isn't animating.
 // 	- Inactivate windows don't dim outline around tabs.
-// 	- Resizing windows doesn't redraw old shadow sometimes.
 
 // TODO Task bar:
 // 	- Right click menu.
-// 	- Notification area.
+// 	- Notification area?
 
 // TODO Desktop experience:
 // 	- Alt+tab.
diff --git a/desktop/gui.cpp b/desktop/gui.cpp
index fac7195..dffcd33 100644
--- a/desktop/gui.cpp
+++ b/desktop/gui.cpp
@@ -7259,6 +7259,8 @@ void UIWindowLayoutNow(EsWindow *window, ProcessMessageTiming *timing) {
 }
 
 bool UISetCursor(EsWindow *window) {
+	ThemeInitialise();
+
 	EsCursorStyle cursorStyle = ES_CURSOR_NORMAL;
 	EsElement *element = window->dragged ?: window->pressed ?: window->hovered;
 
diff --git a/desktop/posix.cpp b/desktop/posix.cpp
index b9bf5bc..bc9eb9d 100644
--- a/desktop/posix.cpp
+++ b/desktop/posix.cpp
@@ -3,9 +3,7 @@
 // Written by: nakst.
 
 #define ES_API
-#define ES_FORWARD(x) x
-#define ES_EXTERN_FORWARD extern "C"
-#define ES_DIRECT_API
+#define ES_FORWARD
 #include <essence.h>
 
 #ifdef ENABLE_POSIX_SUBSYSTEM
diff --git a/desktop/prefix.h b/desktop/prefix.h
index e5dafd8..88765f8 100644
--- a/desktop/prefix.h
+++ b/desktop/prefix.h
@@ -1,8 +1,8 @@
-// This file is part of the Essence operating system.
-// It is released under the terms of the MIT license -- see LICENSE.md.
-// Written by: nakst.
+/* This file is part of the Essence operating system. */
+/* It is released under the terms of the MIT license -- see LICENSE.md. */
+/* Written by: nakst. */
 
-// ----------------- Includes:
+/* ----------------- Includes: */
 
 #ifndef IncludedEssenceAPIHeader
 #define IncludedEssenceAPIHeader
@@ -15,7 +15,7 @@
 #endif
 #include <stdarg.h>
 
-// --------- Architecture defines:
+/* --------- Architecture defines: */
 
 #if defined(__i386__)
 #define ES_ARCH_X86_32
@@ -27,7 +27,7 @@
 #error Architecture is not supported.
 #endif
 
-// --------- C++/C differences:
+/* --------- C++/C differences: */
 
 #ifdef __cplusplus
 
@@ -35,7 +35,7 @@
 #define ES_CONSTRUCTOR(x) x
 #define ES_NULL nullptr
 
-// Scoped defer: http://www.gingerbill.org/article/defer-in-cpp.html
+/* Scoped defer: http://www.gingerbill.org/article/defer-in-cpp.html */
 template <typename F> struct _EsDefer4 { F f; _EsDefer4(F f) : f(f) {} ~_EsDefer4() { f(); } };
 template <typename F> _EsDefer4<F> _EsDeferFunction(F f) { return _EsDefer4<F>(f); }
 #define EsDEFER_3(x) ES_C_PREPROCESSOR_JOIN(x, __COUNTER__)
@@ -76,7 +76,7 @@ typedef struct EsElementPublic EsElementPublic;
 
 #endif
 
-// --------- Macros:
+/* --------- Macros: */
 
 #ifdef ES_ARCH_X86_64
 #define ES_API_BASE ((void **) 0x1000)
@@ -163,8 +163,8 @@ struct ES_INSTANCE_TYPE;
 #define ES_SAMPLE_FORMAT_BYTES_PER_SAMPLE(x) \
 	((x) == ES_SAMPLE_FORMAT_U8 ? 1 : (x) == ES_SAMPLE_FORMAT_S16LE ? 2 : 4)
 
-#define ES_EXTRACT_BITS(value, end, start) (((value) >> (start)) & ((1 << ((end) - (start) + 1)) - 1))   // Moves the bits to the start.
-#define ES_ISOLATE_BITS(value, end, start) (((value)) & (((1 << ((end) - (start) + 1)) - 1) << (start))) // Keeps the bits in place.
+#define ES_EXTRACT_BITS(value, end, start) (((value) >> (start)) & ((1 << ((end) - (start) + 1)) - 1))   /* Moves the bits to the start. */
+#define ES_ISOLATE_BITS(value, end, start) (((value)) & (((1 << ((end) - (start) + 1)) - 1) << (start))) /* Keeps the bits in place. */
 
 #ifndef KERNEL
 #ifdef ES_API
@@ -191,7 +191,7 @@ ES_EXTERN_C uintptr_t _APISyscall(uintptr_t argument0, uintptr_t argument1, uint
 #define EsPerformanceTimerPush() double _performanceTimerStart = EsTimeStampMs()
 #define EsPerformanceTimerPop() ((EsTimeStampMs() - _performanceTimerStart) / 1000.0)
 
-// --------- Algorithms:
+/* --------- Algorithms: */
 
 #define ES_MACRO_SORT(_name, _type, _compar, _contextType) void _name(_type *base, size_t nmemb, _contextType context) { \
 	(void) context; \
@@ -264,7 +264,7 @@ ES_EXTERN_C uintptr_t _APISyscall(uintptr_t argument0, uintptr_t argument1, uint
 		} \
 	} while (0)
 
-// --------- Misc:
+/* --------- Misc: */
 
 typedef uint64_t _EsLongConstant;
 typedef long double EsLongDouble;
@@ -281,7 +281,7 @@ ES_EXTERN_C void _start();
 #define ES_INFINITY __builtin_inff()
 #define ES_PI (3.1415926535897932384626433832795028841971693994)
 
-// --------- Internals:
+/* --------- Internals: */
 
 #if defined(ES_API) || defined(KERNEL) || defined(INSTALLER)
 
@@ -338,7 +338,7 @@ struct GlobalData {
 };
 
 struct SystemStartupDataHeader {
-	// TODO Make mount points and devices equal, somehow?
+	/* TODO Make mount points and devices equal, somehow? */
 	size_t initialMountPointCount;
 	size_t initialDeviceCount;
 	uintptr_t themeCursorData;
@@ -387,33 +387,33 @@ extern "C" void *EsBufferWrite(EsBuffer *buffer, const void *source, size_t writ
 #define ES_THEME_CURSORS_WIDTH (264)
 #define ES_THEME_CURSORS_HEIGHT (128)
 
-// Desktop messages: 
+/* Desktop messages: */
 #define ES_MSG_EMBEDDED_WINDOW_DESTROYED 	((EsMessageType) (ES_MSG_SYSTEM_START + 0x001))
 #define ES_MSG_SET_SCREEN_RESOLUTION		((EsMessageType) (ES_MSG_SYSTEM_START + 0x002))
 #define ES_MSG_DESKTOP	                        ((EsMessageType) (ES_MSG_SYSTEM_START + 0x005))
 
-// Messages sent from Desktop to application instances:
+/* Messages sent from Desktop to application instances: */
 #define ES_MSG_TAB_INSPECT_UI			((EsMessageType) (ES_MSG_SYSTEM_START + 0x101))
 #define ES_MSG_TAB_CLOSE_REQUEST		((EsMessageType) (ES_MSG_SYSTEM_START + 0x102))
-#define ES_MSG_INSTANCE_SAVE_RESPONSE		((EsMessageType) (ES_MSG_SYSTEM_START + 0x103)) // Sent by Desktop after an application requested to save its document.
+#define ES_MSG_INSTANCE_SAVE_RESPONSE		((EsMessageType) (ES_MSG_SYSTEM_START + 0x103)) /* Sent by Desktop after an application requested to save its document. */
 #define ES_MSG_INSTANCE_DOCUMENT_RENAMED	((EsMessageType) (ES_MSG_SYSTEM_START + 0x104))
 #define ES_MSG_INSTANCE_DOCUMENT_UPDATED	((EsMessageType) (ES_MSG_SYSTEM_START + 0x105))
 #define ES_MSG_INSTANCE_RENAME_RESPONSE		((EsMessageType) (ES_MSG_SYSTEM_START + 0x107))
 
-// Debugger messages:
+/* Debugger messages: */
 #define ES_MSG_APPLICATION_CRASH		((EsMessageType) (ES_MSG_SYSTEM_START + 0x201))
 #define ES_MSG_PROCESS_TERMINATED		((EsMessageType) (ES_MSG_SYSTEM_START + 0x202))
 
-// Misc messages:
+/* Misc messages: */
 #define ES_MSG_EYEDROP_REPORT			((EsMessageType) (ES_MSG_SYSTEM_START + 0x301))
 #define ES_MSG_TIMER				((EsMessageType) (ES_MSG_SYSTEM_START + 0x302))
-#define ES_MSG_PING				((EsMessageType) (ES_MSG_SYSTEM_START + 0x303)) // Sent by Desktop to check processes are processing messages.
-#define ES_MSG_WAKEUP				((EsMessageType) (ES_MSG_SYSTEM_START + 0x304)) // Sent to wakeup the message thread, so that it can process locally posted messages.
+#define ES_MSG_PING				((EsMessageType) (ES_MSG_SYSTEM_START + 0x303)) /* Sent by Desktop to check processes are processing messages. */
+#define ES_MSG_WAKEUP				((EsMessageType) (ES_MSG_SYSTEM_START + 0x304)) /* Sent to wakeup the message thread, so that it can process locally posted messages. */
 #define ES_MSG_INSTANCE_OPEN_DELAYED		((EsMessageType) (ES_MSG_SYSTEM_START + 0x305))
 
 #endif
 
-// --------- CRT function macros:
+/* --------- CRT function macros: */
 
 #ifdef ES_CRT_WITHOUT_PREFIX
 #define abs EsCRTabs
diff --git a/desktop/theme.cpp b/desktop/theme.cpp
index bf01640..f798750 100644
--- a/desktop/theme.cpp
+++ b/desktop/theme.cpp
@@ -354,6 +354,7 @@ struct UIStyleKey {
 };
 
 struct {
+	bool initialised;
 	EsBuffer system;
 	const ThemeHeader *header;
 	EsPaintTarget cursors;
@@ -1240,7 +1241,41 @@ struct UIStyle {
 	inline void GetTextStyle(EsTextStyle *style);
 };
 
+void ThemeInitialise() {
+	if (theming.initialised) return;
+	theming.initialised = true;
+
+	EsBuffer data = {};
+	data.in = (const uint8_t *) EsBundleFind(&bundleDesktop, EsLiteral("Theme.dat"), &data.bytes);
+
+	const ThemeHeader *header = (const ThemeHeader *) EsBufferRead(&data, sizeof(ThemeHeader));
+	EsAssert(header && header->signature == THEME_HEADER_SIGNATURE && header->styleCount && EsBufferRead(&data, sizeof(ThemeStyle)));
+	theming.system.in = (const uint8_t *) data.in;
+	theming.system.bytes = data.bytes;
+	theming.header = header;
+
+	theming.scale = api.global->uiScale;
+
+	if (!theming.cursorData) {
+		size_t cursorsBitmapBytes;
+		const void *cursorsBitmap = EsBundleFind(&bundleDesktop, EsLiteral("Cursors.png"), &cursorsBitmapBytes);
+		theming.cursorData = EsMemoryCreateShareableRegion(ES_THEME_CURSORS_WIDTH * ES_THEME_CURSORS_HEIGHT * 4);
+		void *destination = EsMemoryMapObject(theming.cursorData, 0, ES_THEME_CURSORS_WIDTH * ES_THEME_CURSORS_HEIGHT * 4, ES_MEMORY_MAP_OBJECT_READ_WRITE);
+		LoadImage(cursorsBitmap, cursorsBitmapBytes, destination, ES_THEME_CURSORS_WIDTH, ES_THEME_CURSORS_HEIGHT, true);
+		EsObjectUnmap(destination);
+	}
+
+	theming.cursors.width = ES_THEME_CURSORS_WIDTH;
+	theming.cursors.height = ES_THEME_CURSORS_HEIGHT;
+	theming.cursors.stride = ES_THEME_CURSORS_WIDTH * 4;
+	theming.cursors.bits = EsMemoryMapObject(theming.cursorData, 0, ES_MEMORY_MAP_OBJECT_ALL, ES_MEMORY_MAP_OBJECT_READ_ONLY);
+	theming.cursors.fullAlpha = true;
+	theming.cursors.readOnly = true;
+}
+
 const void *GetConstant(const char *cKey, size_t *byteCount, bool *scale) {
+	ThemeInitialise();
+
 	EsBuffer data = theming.system;
 	const ThemeHeader *header = (const ThemeHeader *) EsBufferRead(&data, sizeof(ThemeHeader));
 	EsBufferRead(&data, sizeof(ThemeStyle) * header->styleCount);
@@ -1292,41 +1327,6 @@ const char *GetConstantString(const char *cKey) {
 	return !value || !byteCount || value[byteCount - 1] ? nullptr : value; 
 }
 
-bool ThemeInitialise() {
-	EsBuffer data = {};
-	data.in = (const uint8_t *) EsBundleFind(&bundleDesktop, EsLiteral("Theme.dat"), &data.bytes);
-
-	const ThemeHeader *header = (const ThemeHeader *) EsBufferRead(&data, sizeof(ThemeHeader));
-
-	if (!header || header->signature != THEME_HEADER_SIGNATURE || !header->styleCount || !EsBufferRead(&data, sizeof(ThemeStyle))) {
-		return false;
-	}
-
-	theming.system.in = (const uint8_t *) data.in;
-	theming.system.bytes = data.bytes;
-	theming.header = header;
-
-	theming.scale = api.global->uiScale;
-
-	if (!theming.cursorData) {
-		size_t cursorsBitmapBytes;
-		const void *cursorsBitmap = EsBundleFind(&bundleDesktop, EsLiteral("Cursors.png"), &cursorsBitmapBytes);
-		theming.cursorData = EsMemoryCreateShareableRegion(ES_THEME_CURSORS_WIDTH * ES_THEME_CURSORS_HEIGHT * 4);
-		void *destination = EsMemoryMapObject(theming.cursorData, 0, ES_THEME_CURSORS_WIDTH * ES_THEME_CURSORS_HEIGHT * 4, ES_MEMORY_MAP_OBJECT_READ_WRITE);
-		LoadImage(cursorsBitmap, cursorsBitmapBytes, destination, ES_THEME_CURSORS_WIDTH, ES_THEME_CURSORS_HEIGHT, true);
-		EsObjectUnmap(destination);
-	}
-
-	theming.cursors.width = ES_THEME_CURSORS_WIDTH;
-	theming.cursors.height = ES_THEME_CURSORS_HEIGHT;
-	theming.cursors.stride = ES_THEME_CURSORS_WIDTH * 4;
-	theming.cursors.bits = EsMemoryMapObject(theming.cursorData, 0, ES_MEMORY_MAP_OBJECT_ALL, ES_MEMORY_MAP_OBJECT_READ_ONLY);
-	theming.cursors.fullAlpha = true;
-	theming.cursors.readOnly = true;
-
-	return true;
-}
-
 void ThemeStyleCopyInlineMetrics(UIStyle *style) {
 	style->font.family = style->metrics->fontFamily;
 	style->font.weight = style->metrics->fontWeight;
@@ -1613,6 +1613,8 @@ void ThemeStylePrepare(UIStyle *style, UIStyleKey key) {
 }
 
 UIStyle *ThemeStyleInitialise(UIStyleKey key) {
+	ThemeInitialise();
+
 	// Find the ThemeStyle entry.
 
 	EsStyle *esStyle = (key.part & 1) || (!key.part) ? nullptr : (EsStyle *) (key.part);
diff --git a/kernel/module.h b/kernel/module.h
index 7df4c11..eb7e257 100644
--- a/kernel/module.h
+++ b/kernel/module.h
@@ -32,16 +32,9 @@ extern "C" uint64_t GetKernelVersion() { return KERNEL_VERSION; }
 // API header.
 // ---------------------------------------------------------------------------------------------------------------
 
-#define ES_DIRECT_API
-#define ES_FORWARD(x) x
-#define ES_EXTERN_FORWARD ES_EXTERN_C
+#define ES_FORWARD
 #include <essence.h>
 
-// TODO stb's behaviour with null termination is non-standard.
-extern "C" int EsCRTsprintf(char *buffer, const char *format, ...);
-extern "C" int EsCRTsnprintf(char *buffer, size_t bufferSize, const char *format, ...);
-extern "C" int EsCRTvsnprintf(char *buffer, size_t bufferSize, const char *format, va_list arguments);
-
 // ---------------------------------------------------------------------------------------------------------------
 // Global defines.
 // ---------------------------------------------------------------------------------------------------------------
diff --git a/ports/freetype/build.sh b/ports/freetype/build.sh
index 432ba53..6c31347 100755
--- a/ports/freetype/build.sh
+++ b/ports/freetype/build.sh
@@ -21,8 +21,8 @@ if [ "$1" = "x86_64" ]; then
 		rm -f objs/.libs/libfreetype.a
 		./configure --without-zlib --without-bzip2 --without-png --without-harfbuzz \
 			CC=x86_64-essence-gcc CFLAGS="-g -ffreestanding -Wno-unused-function -O3" \
-			LDFLAGS="-nostdlib -lgcc" --host=x86_64-essence > ../Logs/freetype_configure.txt 2>&1
-		make ANSIFLAGS="" > /dev/null
+			--host=x86_64-essence > ../Logs/freetype_configure.txt 2>&1
+		make -j`nproc` > /dev/null
 		cp objs/.libs/libfreetype.a libfreetype_x86_64.a
 		cd ../..
 	fi
@@ -40,7 +40,7 @@ if [ "$1" = "x86_32" ]; then
 			CC=i686-elf-gcc CFLAGS="-g -ffreestanding -Wno-unused-function -O3 -I$INC" \
 			LDFLAGS="-nostdlib -lgcc" --host=i686-elf > ../Logs/freetype_configure.txt 2>&1
 		sed -i '/define FT_USE_AUTOCONF_SIZEOF_TYPES/d' builds/unix/ftconfig.h
-		make ANSIFLAGS="" > /dev/null
+		make -j`nproc` > /dev/null
 		cp objs/.libs/libfreetype.a libfreetype_x86_32.a
 		cd ../..
 	fi
diff --git a/ports/freetype/patch-ftoption.h b/ports/freetype/patch-ftoption.h
index 98d06bb..f7ff171 100644
--- a/ports/freetype/patch-ftoption.h
+++ b/ports/freetype/patch-ftoption.h
@@ -101,7 +101,7 @@ FT_BEGIN_HEADER
   /*                       cff:no-stem-darkening=1 \                       */
   /*                       autofitter:warping=1                            */
   /*                                                                       */
-// #define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
+/* #define FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES */
 
 
   /*************************************************************************/
@@ -174,7 +174,7 @@ FT_BEGIN_HEADER
   /*                                                                       */
   /*   Define this macro if you want to enable this `feature'.             */
   /*                                                                       */
-// #define FT_CONFIG_OPTION_USE_LZW
+/* #define FT_CONFIG_OPTION_USE_LZW */
 
 
   /*************************************************************************/
@@ -189,7 +189,7 @@ FT_BEGIN_HEADER
   /*   Define this macro if you want to enable this `feature'.  See also   */
   /*   the macro FT_CONFIG_OPTION_SYSTEM_ZLIB below.                       */
   /*                                                                       */
-// #define FT_CONFIG_OPTION_USE_ZLIB
+/* #define FT_CONFIG_OPTION_USE_ZLIB */
 
 
   /*************************************************************************/
diff --git a/ports/freetype/patch-ftstdlib.h b/ports/freetype/patch-ftstdlib.h
index f0aa2ff..4c16676 100644
--- a/ports/freetype/patch-ftstdlib.h
+++ b/ports/freetype/patch-ftstdlib.h
@@ -31,14 +31,8 @@
 #ifndef FTSTDLIB_H_
 #define FTSTDLIB_H_
 
-#ifndef IncludedEssenceAPIHeader
-#define ES_CRT
-#define ES_API
-#define ES_FORWARD(x) x
-#define ES_DIRECT_API
-#define ES_EXTERN_FORWARD extern
+#define ES_FORWARD
 #include <essence.h>
-#endif
 
 #include <stddef.h>
 
@@ -83,7 +77,7 @@
   /**********************************************************************/
 
 
-// #include <string.h>
+/* #include <string.h> */
 
 #define ft_memchr   EsCRTmemchr
 #define ft_memcmp   EsCRTmemcmp
@@ -107,7 +101,7 @@
   /**********************************************************************/
 
 
-// #include <stdio.h>
+/* #include <stdio.h> */
 
 #define FT_FILE     FILE
 #define ft_fclose   fclose
@@ -125,7 +119,7 @@
   /**********************************************************************/
 
 
-// #include <stdlib.h>
+/* #include <stdlib.h> */
 
 #define ft_qsort  EsCRTqsort
 
@@ -161,7 +155,7 @@
   /**********************************************************************/
 
 
-// #include <setjmp.h>
+/* #include <setjmp.h> */
 
 #define ft_jmp_buf     EsCRTjmp_buf  /* note: this cannot be a typedef since */
                                 /*       jmp_buf is defined as a macro  */
diff --git a/ports/harfbuzz/essence-config.h b/ports/harfbuzz/essence-config.h
index fc6cdb1..4b32f69 100644
--- a/ports/harfbuzz/essence-config.h
+++ b/ports/harfbuzz/essence-config.h
@@ -29,10 +29,7 @@
 #define STDC_HEADERS 1
 #define HAVE_FREETYPE 1
 
-#define ES_API
-#define ES_FORWARD(x) x
-#define ES_EXTERN_FORWARD extern "C"
-#define ES_DIRECT_API
+#define ES_FORWARD
 
 #define abs EsCRTabs
 #define assert EsCRTassert
diff --git a/ports/musl/libc.a b/ports/musl/libc.a
index f6c1e40..af0ceff 100644
Binary files a/ports/musl/libc.a and b/ports/musl/libc.a differ
diff --git a/util/build.c b/util/build.c
index e37c8ba..1102924 100644
--- a/util/build.c
+++ b/util/build.c
@@ -348,7 +348,7 @@ void Compile(uint32_t flags, int partitionSize, const char *volumeLabel) {
 	CallSystem("bin/build_core standard bin/build.ini");
 
 #ifdef TOOLCHAIN_HAS_CSTDLIB
-	CallSystem(TOOLCHAIN_PREFIX "-gcc -o root/Applications/POSIX/bin/hello ports/gcc/hello.c");
+	CallSystem(TOOLCHAIN_PREFIX "-gcc -o root/Applications/POSIX/bin/hello -std=c89 ports/gcc/hello.c");
 #endif
 
 	forceRebuild = false;
diff --git a/util/header_generator.c b/util/header_generator.c
index 4f9dd3a..7d46d78 100644
--- a/util/header_generator.c
+++ b/util/header_generator.c
@@ -491,7 +491,7 @@ void OutputCFunction(Entry *entry) {
 
 	bool inKernel = entry->function.inKernel;
 	if (!inKernel) FilePrintFormat(output, "#ifndef KERNEL\n");
-	FilePrintFormat(output, "#ifdef ES_FORWARD\n#ifndef __cplusplus\nES_EXTERN_FORWARD ");
+	FilePrintFormat(output, "#ifdef ES_FORWARD\n#ifndef __cplusplus\nES_EXTERN_C ");
 
 	// C code in API.
 
@@ -502,7 +502,7 @@ void OutputCFunction(Entry *entry) {
 		if (i == 0) FilePrintFormat(output, "(");
 	}
 
-	FilePrintFormat(output, ");\n#else\nES_EXTERN_FORWARD ");
+	FilePrintFormat(output, ");\n#else\nES_EXTERN_C ");
 
 	// C++ code in API.
 
@@ -515,7 +515,7 @@ void OutputCFunction(Entry *entry) {
 		if (i == 0) FilePrintFormat(output, "(");
 	}
 
-	FilePrintFormat(output, ");\n#endif\n#endif\n#ifndef ES_DIRECT_API\ntypedef ");
+	FilePrintFormat(output, ");\n#endif\n#else\ntypedef ");
 
 	// Code in application.