diff --git a/tools/Makefile.host b/tools/Makefile.host
index 73352aae3a..998d389160 100644
--- a/tools/Makefile.host
+++ b/tools/Makefile.host
@@ -37,13 +37,29 @@ TOPDIR ?= ${shell pwd}/..
 -include $(TOPDIR)/Make.defs
 include ${TOPDIR}/tools/Config.mk
 
+# Define HOSTCC on the make command line if it differs from these defaults
+# Define HOSTCFLAGS with -g on the make command line to build debug versions
+
+ifeq ($(CONFIG_WINDOWS_NATIVE),y)
+
+# In the Windows native environment, the MinGW GCC compiler is assumed
+
+HOSTCC ?= mingw-gcc.exe
+HOSTCFLAGS ?= -O2 -Wall -Wstrict-prototypes -Wshadow -I. -DCONFIG_WINDOWS_NATIVE=y
+
+else
+
+# GCC is assumed in the POSIX environment.
 # strtok_r is used in some tools, but does not seem to be available in
 # the MinGW environment.
 
-ifneq ($(CONFIG_WINDOWS_NATIVE),y)
-  HOSTCFLAGS += -D HAVE_STRTOK_C
+HOSTCC ?= gcc
+HOSTCFLAGS ?= -O2 -Wall -Wstrict-prototypes -Wshadow -I. -DHAVE_STRTOK_C
+
 endif
 
+# Targets
+
 all: b16$(HOSTEXEEXT) bdf-converter$(HOSTEXEEXT) cmpconfig$(HOSTEXEEXT) \
     configure$(HOSTEXEEXT) mkconfig$(HOSTEXEEXT) mkdeps$(HOSTEXEEXT) mksymtab$(HOSTEXEEXT) \
     mksyscall$(HOSTEXEEXT) mkversion$(HOSTEXEEXT) 
@@ -55,12 +71,7 @@ else
 .PHONY: clean
 endif
 
-# Add HOSTCFLAGS=-g on the make command line build debug versions
-
-HOSTCFLAGS ?= -O2 -Wall -I.
-HOSTCC ?= gcc
-
-# b16 - Fixed precision math converstion tool
+# b16 - Fixed precision math conversion tool
 
 b16$(HOSTEXEEXT): b16.c 
 	$(Q) $(HOSTCC) $(HOSTCFLAGS) -o b16$(HOSTEXEEXT) b16.c 
diff --git a/tools/cmpconfig.c b/tools/cmpconfig.c
index 08b7dab3f0..a5a5394017 100644
--- a/tools/cmpconfig.c
+++ b/tools/cmpconfig.c
@@ -67,6 +67,7 @@ static void compare_variables(struct variable_s *list1, struct variable_s *list2
 {
   char *varval1;
   char *varval2;
+  int result;
 
   while (list1 || list2)
     {
@@ -102,7 +103,7 @@ static void compare_variables(struct variable_s *list1, struct variable_s *list2
         }
       else
         {
-          int result = strcmp(list1->var, list2->var);
+          result = strcmp(list1->var, list2->var);
           if (result < 0)
             {
               printf("file1: %s=%s\n", list1->var, varval1);
@@ -115,9 +116,9 @@ static void compare_variables(struct variable_s *list1, struct variable_s *list2
               printf("file2: %s=%s\n\n", list2->var, varval2);
               list2 = list2->flink;
             }
-          else
+          else /* if (result == 0) */
             {
-              int result = strcmp(varval1, varval2);
+              result = strcmp(varval1, varval2);
               if (result != 0)
                 {
                   printf("file1: %s=%s\n", list1->var, varval1);
diff --git a/tools/configure.bat b/tools/configure.bat
index c28558fbbd..7dc9ca116c 100644
--- a/tools/configure.bat
+++ b/tools/configure.bat
@@ -93,7 +93,6 @@ configure.exe %debug% %fmt% %appdir% %config%
 if errorlevel 1 echo configure.exe failed
 goto End
 
-
 :NoConfig
 echo Missing ^<board-name^>/^<config-name^> argument
 
diff --git a/tools/mksyscall.c b/tools/mksyscall.c
index a75e82d280..1d172a2a11 100644
--- a/tools/mksyscall.c
+++ b/tools/mksyscall.c
@@ -61,11 +61,11 @@ static FILE *g_stubstream;
  * Private Functions
  ****************************************************************************/
 
-static bool is_vararg(const char *type, int index, int nparms)
+static bool is_vararg(const char *type, int ndx, int nparms)
 {
   if (strcmp(type,"...") == 0)
     {
-      if (index != (nparms-1))
+      if (ndx != (nparms-1))
         {
           fprintf(stderr, "%d: ... is not the last in the argument list\n", g_lineno);
           exit(11);
@@ -75,8 +75,10 @@ static bool is_vararg(const char *type, int index, int nparms)
           fprintf(stderr, "%d: Need one parameter before ...\n", g_lineno);
           exit(14);
         }
+
       return true;
     }
+
   return false;
 }