diff --git a/generate/efi/Makefile.config b/generate/efi/Makefile.config
index d7872c8ac..6c7c5950b 100644
--- a/generate/efi/Makefile.config
+++ b/generate/efi/Makefile.config
@@ -95,17 +95,23 @@ LD =        ld
 OBJCOPY =   objcopy
 
 CFLAGS  = \
+	--save-temps\
+	-nostdinc\
+	-nostdlib\
 	-std=c99\
 	-U__linux__\
 	-U_LINUX\
 	-D_GNU_EFI\
 	-D_GNU_SOURCE\
+	-fno-builtin\
+	-iwithprefix include\
 	-fno-stack-protector\
 	-fno-strict-aliasing\
 	-fpic\
 	-fshort-wchar\
 	-I$(ACPICA_INCLUDE)
 LDFLAGS	= \
+	-nostdinc\
 	-nostdlib\
 	-znocombreloc\
 	-Bsymbolic
diff --git a/generate/efi/acpidump/Makefile b/generate/efi/acpidump/Makefile
index d7d5f48f8..672421d6e 100644
--- a/generate/efi/acpidump/Makefile
+++ b/generate/efi/acpidump/Makefile
@@ -38,8 +38,8 @@ OBJECTS = \
 	$(OBJDIR)/tbxfroot.o\
 	$(OBJDIR)/utascii.o\
 	$(OBJDIR)/utbuffer.o\
-	$(OBJDIR)/utdebug.o\
 	$(OBJDIR)/utclib.o\
+	$(OBJDIR)/utdebug.o\
 	$(OBJDIR)/utexcep.o\
 	$(OBJDIR)/utglobal.o\
 	$(OBJDIR)/utmath.o\
diff --git a/source/common/acfileio.c b/source/common/acfileio.c
index c00580fc7..8b7d28360 100644
--- a/source/common/acfileio.c
+++ b/source/common/acfileio.c
@@ -118,7 +118,6 @@
 #include "acapps.h"
 #include "actables.h"
 #include "acutils.h"
-#include <errno.h>
 
 #define _COMPONENT          ACPI_UTILITIES
         ACPI_MODULE_NAME    ("acfileio")
@@ -352,7 +351,7 @@ AcGetOneTableFromFile (
 
     /* Allocate a buffer for the entire table */
 
-    Table = AcpiOsAllocate ((size_t) TableHeader.Length);
+    Table = AcpiOsAllocate ((ACPI_SIZE) TableHeader.Length);
     if (!Table)
     {
         return (AE_NO_MEMORY);
@@ -460,7 +459,7 @@ AcValidateTableHeader (
     long                    TableOffset)
 {
     ACPI_TABLE_HEADER       TableHeader;
-    size_t                  Actual;
+    ACPI_SIZE               Actual;
     long                    OriginalOffset;
     UINT32                  FileSize;
     UINT32                  i;
diff --git a/source/common/acgetline.c b/source/common/acgetline.c
index dfc065389..a28aaf78d 100644
--- a/source/common/acgetline.c
+++ b/source/common/acgetline.c
@@ -119,8 +119,6 @@
 #include "acparser.h"
 #include "acdebug.h"
 
-#include <stdio.h>
-
 /*
  * This is an os-independent implementation of line-editing services needed
  * by the AcpiExec utility. It uses getchar() and putchar() and the existing
diff --git a/source/common/cmfsize.c b/source/common/cmfsize.c
index accdf225b..4d35105cb 100644
--- a/source/common/cmfsize.c
+++ b/source/common/cmfsize.c
@@ -116,7 +116,6 @@
 #include "acpi.h"
 #include "accommon.h"
 #include "acapps.h"
-#include <stdio.h>
 
 #define _COMPONENT          ACPI_TOOLS
         ACPI_MODULE_NAME    ("cmfsize")
diff --git a/source/components/debugger/dbfileio.c b/source/components/debugger/dbfileio.c
index d7942b745..78e06eb86 100644
--- a/source/components/debugger/dbfileio.c
+++ b/source/components/debugger/dbfileio.c
@@ -118,7 +118,6 @@
 #include "accommon.h"
 #include "acdebug.h"
 #include "actables.h"
-#include <stdio.h>
 #ifdef ACPI_APPLICATION
 #include "acapps.h"
 #endif
diff --git a/source/components/utilities/utbuffer.c b/source/components/utilities/utbuffer.c
index 4a50e9e06..fe5c7d505 100644
--- a/source/components/utilities/utbuffer.c
+++ b/source/components/utilities/utbuffer.c
@@ -336,7 +336,7 @@ AcpiUtDumpBufferToFile (
 
     if (!Buffer)
     {
-        AcpiUtFilePrintf (File, "Null Buffer Pointer in DumpBuffer!\n");
+        fprintf (File, "Null Buffer Pointer in DumpBuffer!\n");
         return;
     }
 
@@ -351,7 +351,7 @@ AcpiUtDumpBufferToFile (
     {
         /* Print current offset */
 
-        AcpiUtFilePrintf (File, "%6.4X: ", (BaseOffset + i));
+        fprintf (File, "%6.4X: ", (BaseOffset + i));
 
         /* Print 16 hex chars */
 
@@ -361,7 +361,7 @@ AcpiUtDumpBufferToFile (
             {
                 /* Dump fill spaces */
 
-                AcpiUtFilePrintf (File, "%*s", ((Display * 2) + 1), " ");
+                fprintf (File, "%*s", ((Display * 2) + 1), " ");
                 j += Display;
                 continue;
             }
@@ -371,28 +371,28 @@ AcpiUtDumpBufferToFile (
             case DB_BYTE_DISPLAY:
             default:    /* Default is BYTE display */
 
-                AcpiUtFilePrintf (File, "%02X ", Buffer[(ACPI_SIZE) i + j]);
+                fprintf (File, "%02X ", Buffer[(ACPI_SIZE) i + j]);
                 break;
 
             case DB_WORD_DISPLAY:
 
                 ACPI_MOVE_16_TO_32 (&Temp32, &Buffer[(ACPI_SIZE) i + j]);
-                AcpiUtFilePrintf (File, "%04X ", Temp32);
+                fprintf (File, "%04X ", Temp32);
                 break;
 
             case DB_DWORD_DISPLAY:
 
                 ACPI_MOVE_32_TO_32 (&Temp32, &Buffer[(ACPI_SIZE) i + j]);
-                AcpiUtFilePrintf (File, "%08X ", Temp32);
+                fprintf (File, "%08X ", Temp32);
                 break;
 
             case DB_QWORD_DISPLAY:
 
                 ACPI_MOVE_32_TO_32 (&Temp32, &Buffer[(ACPI_SIZE) i + j]);
-                AcpiUtFilePrintf (File, "%08X", Temp32);
+                fprintf (File, "%08X", Temp32);
 
                 ACPI_MOVE_32_TO_32 (&Temp32, &Buffer[(ACPI_SIZE) i + j + 4]);
-                AcpiUtFilePrintf (File, "%08X ", Temp32);
+                fprintf (File, "%08X ", Temp32);
                 break;
             }
 
@@ -403,29 +403,29 @@ AcpiUtDumpBufferToFile (
          * Print the ASCII equivalent characters but watch out for the bad
          * unprintable ones (printable chars are 0x20 through 0x7E)
          */
-        AcpiUtFilePrintf (File, " ");
+        fprintf (File, " ");
         for (j = 0; j < 16; j++)
         {
             if (i + j >= Count)
             {
-                AcpiUtFilePrintf (File, "\n");
+                fprintf (File, "\n");
                 return;
             }
 
             BufChar = Buffer[(ACPI_SIZE) i + j];
             if (isprint (BufChar))
             {
-                AcpiUtFilePrintf (File, "%c", BufChar);
+                fprintf (File, "%c", BufChar);
             }
             else
             {
-                AcpiUtFilePrintf (File, ".");
+                fprintf (File, ".");
             }
         }
 
         /* Done with that line. */
 
-        AcpiUtFilePrintf (File, "\n");
+        fprintf (File, "\n");
         i += 16;
     }
 
diff --git a/source/components/utilities/utclib.c b/source/components/utilities/utclib.c
index 26fbaf958..7e61b980a 100644
--- a/source/components/utilities/utclib.c
+++ b/source/components/utilities/utclib.c
@@ -163,7 +163,7 @@
         ACPI_MODULE_NAME    ("utclib")
 
 
-#ifndef ACPI_USE_SYSTEM_CLIBRARY    /* Entire module */
+#if defined(ACPI_USE_SYSTEM_CLIBRARY) && !defined(ACPI_USE_STANDARD_HEADERS)
 
 
 /*******************************************************************************
@@ -987,4 +987,4 @@ const UINT8 AcpiGbl_Ctypes[257] = {
 };
 
 
-#endif /* ACPI_USE_SYSTEM_CLIBRARY */
+#endif /* ACPI_USE_SYSTEM_CLIBRARY && !ACPI_USE_STANDARD_HEADERS */
diff --git a/source/components/utilities/utdebug.c b/source/components/utilities/utdebug.c
index 4d2b306a0..d13c0974e 100644
--- a/source/components/utilities/utdebug.c
+++ b/source/components/utilities/utdebug.c
@@ -804,7 +804,7 @@ AcpiLogError (
     va_list                 Args;
 
     va_start (Args, Format);
-    (void) AcpiUtFileVprintf (ACPI_FILE_ERR, Format, Args);
+    (void) vfprintf (ACPI_FILE_ERR, Format, Args);
     va_end (Args);
 }
 
diff --git a/source/components/utilities/utpredef.c b/source/components/utilities/utpredef.c
index 01196bb03..a97064c7a 100644
--- a/source/components/utilities/utpredef.c
+++ b/source/components/utilities/utpredef.c
@@ -268,8 +268,6 @@ AcpiUtGetExpectedReturnTypes (
  ******************************************************************************/
 
 #if (defined ACPI_ASL_COMPILER || defined ACPI_HELP_APP)
-#include <stdio.h>
-#include <string.h>
 
 /* Local prototypes */
 
diff --git a/source/components/utilities/utprint.c b/source/components/utilities/utprint.c
index 5ca859ec4..ec7c0cce4 100644
--- a/source/components/utilities/utprint.c
+++ b/source/components/utilities/utprint.c
@@ -120,6 +120,8 @@
         ACPI_MODULE_NAME    ("utprint")
 
 
+#if defined(ACPI_USE_SYSTEM_CLIBRARY) && !defined(ACPI_USE_STANDARD_HEADERS)
+
 #define ACPI_FORMAT_SIGN            0x01
 #define ACPI_FORMAT_SIGN_PLUS       0x02
 #define ACPI_FORMAT_SIGN_PLUS_SPACE 0x04
@@ -488,7 +490,7 @@ AcpiUtFormatNumber (
 
 /*******************************************************************************
  *
- * FUNCTION:    AcpiUtVsnprintf
+ * FUNCTION:    vsnprintf
  *
  * PARAMETERS:  String              - String with boundary
  *              Size                - Boundary of the string
@@ -502,7 +504,7 @@ AcpiUtFormatNumber (
  ******************************************************************************/
 
 int
-AcpiUtVsnprintf (
+vsnprintf (
     char                    *String,
     ACPI_SIZE               Size,
     const char              *Format,
@@ -785,7 +787,7 @@ AcpiUtVsnprintf (
 
 /*******************************************************************************
  *
- * FUNCTION:    AcpiUtSnprintf
+ * FUNCTION:    snprintf
  *
  * PARAMETERS:  String              - String with boundary
  *              Size                - Boundary of the string
@@ -798,7 +800,7 @@ AcpiUtVsnprintf (
  ******************************************************************************/
 
 int
-AcpiUtSnprintf (
+snprintf (
     char                    *String,
     ACPI_SIZE               Size,
     const char              *Format,
@@ -809,7 +811,38 @@ AcpiUtSnprintf (
 
 
     va_start (Args, Format);
-    Length = AcpiUtVsnprintf (String, Size, Format, Args);
+    Length = vsnprintf (String, Size, Format, Args);
+    va_end (Args);
+
+    return (Length);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    sprintf
+ *
+ * PARAMETERS:  String              - String with boundary
+ *              Format, ...         - Standard printf format
+ *
+ * RETURN:      Number of bytes actually written.
+ *
+ * DESCRIPTION: Formatted output to a string.
+ *
+ ******************************************************************************/
+
+int
+sprintf (
+    char                    *String,
+    const char              *Format,
+    ...)
+{
+    va_list                 Args;
+    int                     Length;
+
+
+    va_start (Args, Format);
+    Length = vsnprintf (String, ACPI_UINT32_MAX, Format, Args);
     va_end (Args);
 
     return (Length);
@@ -819,7 +852,69 @@ AcpiUtSnprintf (
 #ifdef ACPI_APPLICATION
 /*******************************************************************************
  *
- * FUNCTION:    AcpiUtFileVprintf
+ * FUNCTION:    vprintf
+ *
+ * PARAMETERS:  Format              - Standard printf format
+ *              Args                - Argument list
+ *
+ * RETURN:      Number of bytes actually written.
+ *
+ * DESCRIPTION: Formatted output to stdout using argument list pointer.
+ *
+ ******************************************************************************/
+
+int
+vprintf (
+    const char              *Format,
+    va_list                 Args)
+{
+    ACPI_CPU_FLAGS          Flags;
+    int                     Length;
+
+
+    Flags = AcpiOsAcquireLock (AcpiGbl_PrintLock);
+    Length = vsnprintf (AcpiGbl_PrintBuffer,
+                sizeof (AcpiGbl_PrintBuffer), Format, Args);
+
+    (void) AcpiOsWriteFile (ACPI_FILE_OUT, AcpiGbl_PrintBuffer, Length, 1);
+    AcpiOsReleaseLock (AcpiGbl_PrintLock, Flags);
+
+    return (Length);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    printf
+ *
+ * PARAMETERS:  Format, ...         - Standard printf format
+ *
+ * RETURN:      Number of bytes actually written.
+ *
+ * DESCRIPTION: Formatted output to stdout.
+ *
+ ******************************************************************************/
+
+int
+printf (
+    const char              *Format,
+    ...)
+{
+    va_list                 Args;
+    int                     Length;
+
+
+    va_start (Args, Format);
+    Length = vprintf (Format, Args);
+    va_end (Args);
+
+    return (Length);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    vfprintf
  *
  * PARAMETERS:  File                - File descriptor
  *              Format              - Standard printf format
@@ -832,8 +927,8 @@ AcpiUtSnprintf (
  ******************************************************************************/
 
 int
-AcpiUtFileVprintf (
-    ACPI_FILE               File,
+vfprintf (
+    FILE                    *File,
     const char              *Format,
     va_list                 Args)
 {
@@ -842,7 +937,7 @@ AcpiUtFileVprintf (
 
 
     Flags = AcpiOsAcquireLock (AcpiGbl_PrintLock);
-    Length = AcpiUtVsnprintf (AcpiGbl_PrintBuffer,
+    Length = vsnprintf (AcpiGbl_PrintBuffer,
         sizeof (AcpiGbl_PrintBuffer), Format, Args);
 
     (void) AcpiOsWriteFile (File, AcpiGbl_PrintBuffer, Length, 1);
@@ -854,7 +949,7 @@ AcpiUtFileVprintf (
 
 /*******************************************************************************
  *
- * FUNCTION:    AcpiUtFilePrintf
+ * FUNCTION:    fprintf
  *
  * PARAMETERS:  File                - File descriptor
  *              Format, ...         - Standard printf format
@@ -866,8 +961,8 @@ AcpiUtFileVprintf (
  ******************************************************************************/
 
 int
-AcpiUtFilePrintf (
-    ACPI_FILE               File,
+fprintf (
+    FILE                    *File,
     const char              *Format,
     ...)
 {
@@ -876,9 +971,10 @@ AcpiUtFilePrintf (
 
 
     va_start (Args, Format);
-    Length = AcpiUtFileVprintf (File, Format, Args);
+    Length = vfprintf (File, Format, Args);
     va_end (Args);
 
     return (Length);
 }
 #endif
+#endif /* ACPI_USE_SYSTEM_CLIBRARY && !ACPI_USE_STANDARD_HEADERS */
diff --git a/source/include/acapps.h b/source/include/acapps.h
index b8ab5a3c6..8699dcbba 100644
--- a/source/include/acapps.h
+++ b/source/include/acapps.h
@@ -116,12 +116,6 @@
 #ifndef _ACAPPS
 #define _ACAPPS
 
-#include <stdio.h>
-
-#ifdef _MSC_VER                 /* disable some level-4 warnings */
-#pragma warning(disable:4100)   /* warning C4100: unreferenced formal parameter */
-#endif
-
 /* Common info for tool signons */
 
 #define ACPICA_NAME                 "Intel ACPI Component Architecture"
diff --git a/source/include/acclib.h b/source/include/acclib.h
index 267c73d25..46919656b 100644
--- a/source/include/acclib.h
+++ b/source/include/acclib.h
@@ -236,4 +236,61 @@ int
 toupper (
     int                     c);
 
+/*
+ * utprint - printf/vprintf output functions
+ */
+const char *
+AcpiUtScanNumber (
+    const char              *String,
+    UINT64                  *NumberPtr);
+
+const char *
+AcpiUtPrintNumber (
+    char                    *String,
+    UINT64                  Number);
+
+int
+vsnprintf (
+    char                    *String,
+    ACPI_SIZE               Size,
+    const char              *Format,
+    va_list                 Args);
+
+int
+snprintf (
+    char                    *String,
+    ACPI_SIZE               Size,
+    const char              *Format,
+    ...);
+
+int
+sprintf (
+    char                    *String,
+    const char              *Format,
+    ...);
+
+#ifdef ACPI_APPLICATION
+int
+vprintf (
+    const char              *Format,
+    va_list                 Args);
+
+int
+printf (
+    const char              *Format,
+    ...);
+
+int
+vfprintf (
+    FILE                    *File,
+    const char              *Format,
+    va_list                 Args);
+
+int
+fprintf (
+    FILE                    *File,
+    const char              *Format,
+    ...);
+#endif
+
 #endif /* _ACCLIB_H */
diff --git a/source/include/accommon.h b/source/include/accommon.h
index 76f76d62f..7e398b590 100644
--- a/source/include/accommon.h
+++ b/source/include/accommon.h
@@ -131,9 +131,9 @@
 #include "acglobal.h"           /* All global variables */
 #include "achware.h"            /* Hardware defines and interfaces */
 #include "acutils.h"            /* Utility interfaces */
-#ifndef ACPI_USE_SYSTEM_CLIBRARY
+#if defined(ACPI_USE_SYSTEM_CLIBRARY) && !defined(ACPI_USE_STANDARD_HEADERS)
 #include "acclib.h"             /* C library interfaces */
-#endif /* !ACPI_USE_SYSTEM_CLIBRARY */
+#endif /* ACPI_USE_SYSTEM_CLIBRARY && !ACPI_USE_STANDARD_HEADERS */
 
 
 #endif /* __ACCOMMON_H__ */
diff --git a/source/include/acutils.h b/source/include/acutils.h
index 3fdca4599..358d1c8b7 100644
--- a/source/include/acutils.h
+++ b/source/include/acutils.h
@@ -1139,48 +1139,6 @@ AcpiAhMatchUuid (
     UINT8                   *Data);
 
 
-/*
- * utprint - printf/vprintf output functions
- */
-const char *
-AcpiUtScanNumber (
-    const char              *String,
-    UINT64                  *NumberPtr);
-
-const char *
-AcpiUtPrintNumber (
-    char                    *String,
-    UINT64                  Number);
-
-int
-AcpiUtVsnprintf (
-    char                    *String,
-    ACPI_SIZE               Size,
-    const char              *Format,
-    va_list                 Args);
-
-int
-AcpiUtSnprintf (
-    char                    *String,
-    ACPI_SIZE               Size,
-    const char              *Format,
-    ...);
-
-#ifdef ACPI_APPLICATION
-int
-AcpiUtFileVprintf (
-    ACPI_FILE               File,
-    const char              *Format,
-    va_list                 Args);
-
-int
-AcpiUtFilePrintf (
-    ACPI_FILE               File,
-    const char              *Format,
-    ...);
-#endif
-
-
 /*
  * utuuid -- UUID support functions
  */
diff --git a/source/include/platform/acefi.h b/source/include/platform/acefi.h
index a252b2cd9..b251c1504 100644
--- a/source/include/platform/acefi.h
+++ b/source/include/platform/acefi.h
@@ -116,12 +116,6 @@
 #ifndef __ACEFI_H__
 #define __ACEFI_H__
 
-#include <stdarg.h>
-#if defined(_GNU_EFI)
-#include <stdint.h>
-#include <unistd.h>
-#endif
-
 #if defined(__x86_64__)
 #if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
 #define USE_MS_ABI 1
@@ -136,16 +130,6 @@
 #define EFIAPI
 #endif
 
-typedef uint8_t     UINT8;
-typedef uint16_t    UINT16;
-typedef int16_t     INT16;
-typedef uint32_t    UINT32;
-typedef int32_t     INT32;
-typedef uint64_t    UINT64;
-typedef int64_t     INT64;
-typedef uint8_t     BOOLEAN;
-typedef uint16_t    CHAR16;
-
 #define VOID        void
 
 #if defined(__ia64__) || defined(__x86_64__)
@@ -166,8 +150,8 @@ typedef uint16_t    CHAR16;
 
 #endif
 
-typedef uint64_t    UINTN;
-typedef int64_t     INTN;
+#define UINTN       uint64_t
+#define INTN        int64_t
 
 #define EFIERR(a)           (0x8000000000000000 | a)
 
@@ -176,13 +160,14 @@ typedef int64_t     INTN;
 #define ACPI_MACHINE_WIDTH          32
 #define ACPI_USE_NATIVE_DIVIDE
 
-typedef uint32_t UINTN;
-typedef int32_t INTN;
+#define UINTN       uint32_t
+#define INTN        int32_t
 
 #define EFIERR(a)           (0x80000000 | a)
 
 #endif
 
+#define CHAR16      uint16_t
 
 #ifdef USE_EFI_FUNCTION_WRAPPER
 #define __VA_NARG__(...)                        \
@@ -306,10 +291,9 @@ UINT64 efi_call10(void *func, UINT64 arg1, UINT64 arg2, UINT64 arg3,
 
 #include "acgcc.h"
 
-#undef ACPI_USE_SYSTEM_CLIBRARY
 #undef ACPI_USE_STANDARD_HEADERS
 #undef ACPI_USE_NATIVE_DIVIDE
-#define ACPI_USE_SYSTEM_INTTYPES
+#undef ACPI_USE_SYSTEM_INTTYPES
 
 /*
  * Math helpers
@@ -340,8 +324,8 @@ struct _EFI_SYSTEM_TABLE;
 extern struct _EFI_SYSTEM_TABLE         *ST;
 extern struct _EFI_BOOT_SERVICES        *BS;
 
-#define ACPI_FILE           struct _SIMPLE_TEXT_OUTPUT_INTERFACE *
-#define ACPI_FILE_OUT       ST->ConOut
-#define ACPI_FILE_ERR       ST->ConOut
+#define FILE                struct _SIMPLE_TEXT_OUTPUT_INTERFACE
+#define stdout              ST->ConOut
+#define stderr              ST->ConOut
 
 #endif /* __ACEFI_H__ */
diff --git a/source/include/platform/acenv.h b/source/include/platform/acenv.h
index 41022a7e4..878be8c12 100644
--- a/source/include/platform/acenv.h
+++ b/source/include/platform/acenv.h
@@ -422,12 +422,47 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
+#ifdef ACPI_APPLICATION
+#include <stdio.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#endif
 
-#endif /* ACPI_USE_STANDARD_HEADERS */
+#else /* ACPI_USE_STANDARD_HEADERS */
 
-/* We will be linking to the standard Clib functions */
+#ifdef ACPI_USE_COMPILER_VA
 
-#else
+/*
+ * We will be linking to the standard Clib functions, but stdarg.h is
+ * compiler specific, this works for linux kernel.
+ */
+#include <stdarg.h>
+
+#else /* ACPI_USE_COMPILER_VA */
+
+#ifndef va_arg
+
+#ifndef _VALIST
+#define _VALIST
+typedef char *va_list;
+#endif /* _VALIST */
+
+/* Storage alignment properties */
+
+#define  _AUPBND                (sizeof (ACPI_NATIVE_INT) - 1)
+#define  _ADNBND                (sizeof (ACPI_NATIVE_INT) - 1)
+
+/* Variable argument list macro definitions */
+
+#define _Bnd(X, bnd)            (((sizeof (X)) + (bnd)) & (~(bnd)))
+#define va_arg(ap, T)           (*(T *)(((ap) += (_Bnd (T, _AUPBND))) - (_Bnd (T,_ADNBND))))
+#define va_end(ap)              (ap = (va_list) NULL)
+#define va_start(ap, A)         (void) ((ap) = (((char *) &(A)) + (_Bnd (A,_AUPBND))))
+
+#endif /* va_arg */
+
+#endif /* ACPI_USE_COMPILER_VA */
 
 /******************************************************************************
  *
@@ -435,6 +470,19 @@
  *
  *****************************************************************************/
 
+typedef signed char                     int8_t;
+typedef short int                       int16_t;
+typedef int                             int32_t;
+typedef unsigned char                   uint8_t;
+typedef unsigned short int              uint16_t;
+typedef unsigned int                    uint32_t;
+typedef COMPILER_DEPENDENT_INT64        int64_t;
+typedef COMPILER_DEPENDENT_UINT64       uint64_t;
+
+#endif /* ACPI_USE_STANDARD_HEADERS */
+
+#else /* ACPI_USE_SYSTEM_CLIBRARY */
+
 /*
  * Use local definitions of C library macros and functions. These function
  * implementations may not be as efficient as an inline or assembly code
@@ -466,9 +514,7 @@ typedef char *va_list;
 
 #endif /* ACPI_USE_SYSTEM_CLIBRARY */
 
-#ifndef ACPI_FILE
 #ifdef ACPI_APPLICATION
-#include <stdio.h>
 #define ACPI_FILE              FILE *
 #define ACPI_FILE_OUT          stdout
 #define ACPI_FILE_ERR          stderr
@@ -477,6 +523,5 @@ typedef char *va_list;
 #define ACPI_FILE_OUT          NULL
 #define ACPI_FILE_ERR          NULL
 #endif /* ACPI_APPLICATION */
-#endif /* ACPI_FILE */
 
 #endif /* __ACENV_H__ */
diff --git a/source/include/platform/acgcc.h b/source/include/platform/acgcc.h
index 3d36a38a3..773bd8959 100644
--- a/source/include/platform/acgcc.h
+++ b/source/include/platform/acgcc.h
@@ -116,6 +116,10 @@
 #ifndef __ACGCC_H__
 #define __ACGCC_H__
 
+/* Allow inclusion of stdarg.h */
+
+#define ACPI_USE_COMPILER_VA
+
 #define ACPI_INLINE             __inline__
 
 /* Function name is used for debug output. Non-ANSI, compiler-dependent */
diff --git a/source/include/platform/aclinux.h b/source/include/platform/aclinux.h
index 912773593..c948f6900 100644
--- a/source/include/platform/aclinux.h
+++ b/source/include/platform/aclinux.h
@@ -245,11 +245,9 @@
 
 #else /* !__KERNEL__ */
 
-#include <stdarg.h>
-#include <string.h>
-#include <stdlib.h>
-#include <ctype.h>
 #include <unistd.h>
+#define ACPI_USE_SYSTEM_CLIBRARY
+#define ACPI_USE_STANDARD_HEADERS
 
 /* Define/disable kernel-specific declarators */
 
diff --git a/source/include/platform/acmsvc.h b/source/include/platform/acmsvc.h
index 133f449ef..c7cf21bc7 100644
--- a/source/include/platform/acmsvc.h
+++ b/source/include/platform/acmsvc.h
@@ -225,6 +225,10 @@
 #pragma warning( disable : 4295 ) /* needed for acpredef.h array */
 #endif
 
+#ifdef _MSC_VER                 /* disable some level-4 warnings */
+#pragma warning(disable:4100)   /* warning C4100: unreferenced formal parameter */
+#endif
+
 
 /* Debug support. */
 
diff --git a/source/os_specific/service_layers/osefixf.c b/source/os_specific/service_layers/osefixf.c
index fa111b508..1947197e1 100644
--- a/source/os_specific/service_layers/osefixf.c
+++ b/source/os_specific/service_layers/osefixf.c
@@ -827,7 +827,7 @@ AcpiOsVprintf (
     va_list                 Args)
 {
 
-    (void) AcpiUtFileVprintf (ACPI_FILE_OUT, Format, Args);
+    (void) vfprintf (ACPI_FILE_OUT, Format, Args);
 }
 
 
diff --git a/source/tools/acpidump/acpidump.h b/source/tools/acpidump/acpidump.h
index 76843da28..b15de1d86 100644
--- a/source/tools/acpidump/acpidump.h
+++ b/source/tools/acpidump/acpidump.h
@@ -128,12 +128,6 @@
 #include "accommon.h"
 #include "actables.h"
 
-#include <stdio.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <sys/stat.h>
-
-
 /* Globals */
 
 EXTERN BOOLEAN              INIT_GLOBAL (Gbl_SummaryMode, FALSE);
diff --git a/source/tools/acpidump/apdump.c b/source/tools/acpidump/apdump.c
index 783060080..bb5bd545b 100644
--- a/source/tools/acpidump/apdump.c
+++ b/source/tools/acpidump/apdump.c
@@ -295,13 +295,13 @@ ApDumpTableBuffer (
      * Note: simplest to just always emit a 64-bit address. AcpiXtract
      * utility can handle this.
      */
-    AcpiUtFilePrintf (Gbl_OutputFile, "%4.4s @ 0x%8.8X%8.8X\n",
+    fprintf (Gbl_OutputFile, "%4.4s @ 0x%8.8X%8.8X\n",
         Table->Signature, ACPI_FORMAT_UINT64 (Address));
 
     AcpiUtDumpBufferToFile (Gbl_OutputFile,
         ACPI_CAST_PTR (UINT8, Table), TableLength,
         DB_BYTE_DISPLAY, 0);
-    AcpiUtFilePrintf (Gbl_OutputFile, "\n");
+    fprintf (Gbl_OutputFile, "\n");
     return (0);
 }
 
diff --git a/source/tools/acpidump/apfiles.c b/source/tools/acpidump/apfiles.c
index 9394e98cf..04d9cf250 100644
--- a/source/tools/acpidump/apfiles.c
+++ b/source/tools/acpidump/apfiles.c
@@ -225,7 +225,7 @@ ApWriteToBinaryFile (
     char                    Filename[ACPI_NAME_SIZE + 16];
     char                    InstanceStr [16];
     ACPI_FILE               File;
-    size_t                  Actual;
+    ACPI_SIZE               Actual;
     UINT32                  TableLength;
 
 
@@ -254,7 +254,7 @@ ApWriteToBinaryFile (
 
     if (Instance > 0)
     {
-        AcpiUtSnprintf (InstanceStr, sizeof (InstanceStr), "%u", Instance);
+        snprintf (InstanceStr, sizeof (InstanceStr), "%u", Instance);
         strcat (Filename, InstanceStr);
     }
 
@@ -311,7 +311,7 @@ ApGetTableFromFile (
     ACPI_TABLE_HEADER       *Buffer = NULL;
     ACPI_FILE               File;
     UINT32                  FileSize;
-    size_t                  Actual;
+    ACPI_SIZE               Actual;
 
 
     /* Must use binary mode */