--- a/auto/fmt/ptrfmt
+++ b/auto/fmt/ptrfmt
@@ -2,71 +2,85 @@
 # Copyright (C) Igor Sysoev
 
 
-echo $ngx_n "checking for $ngx_type printf() format ..." $ngx_c
-echo >> $NGX_ERR
-echo "checking for $ngx_type printf() format" >> $NGX_ERR
+echo $ngx_n "checking for $ngx_type printf() format ...$ngx_c"
+
+cat << END >> $NGX_AUTOCONF_ERR
+
+----------------------------------------
+checking for $ngx_type printf() format
 
-ngx_fmt=no
-comma=
-fmtX=
+END
+
 
-for fmt in $ngx_formats
+ngx_format=no
+ngx_comma=
+ngx_fmt_x=
+
+for ngx_fmt in $ngx_formats
 do
 
     cat << END > $NGX_AUTOTEST.c
 
 int main() {
-    printf("$fmt", ($ngx_type) $ngx_max_value);
+    printf("$ngx_fmt", ($ngx_type) $ngx_max_value);
     return 0;
 }
 
 END
 
-    eval "$CC_WARN $CC_TEST_FLAGS -o $NGX_AUTOTEST $NGX_AUTOTEST.c \
-          >> $NGX_ERR 2>&1"
+    ngx_test="$CC $CC_TEST_FLAGS $CC_WARN $CC_AUX_FLAGS \
+              -o $NGX_AUTOTEST $NGX_AUTOTEST.c"
+    eval "$ngx_test >> $NGX_AUTOCONF_ERR 2>&1"
 
-    max_value=`echo $ngx_max_value | sed -e "s/L*\$//"`
+    ngx_max_val=`echo $ngx_max_value | sed -e "s/L*\$//"`
 
     if [ -x $NGX_AUTOTEST ]; then
-        if [ "`$NGX_AUTOTEST`" = $max_value ]; then
-            ngx_fmt=$fmt
+        if [ "`$NGX_AUTOTEST`" = $ngx_max_val ]; then
+            ngx_format=$ngx_fmt
         fi
     fi
 
-    rm $NGX_AUTOTEST*
+    rm $NGX_AUTOTEST
 
-    if [ $ngx_fmt != no ]; then
+    if [ $ngx_format != no ]; then
         break
     fi
 
-    fmtX=`echo $fmt | sed -e "s/d/X/"`
+    ngx_fmt_x=`echo $ngx_fmt | sed -e "s/d/X/"`
+
+    echo $ngx_n "$ngx_comma \"${ngx_fmt_x}\" is not appropriate$ngx_c"
+    ngx_comma=","
 
-    echo $ngx_n "$comma \"${fmtX}\" is not appropriate" $ngx_c
-    comma=","
+    echo "----------"    >> $NGX_AUTOCONF_ERR
+    cat $NGX_AUTOTEST.c  >> $NGX_AUTOCONF_ERR
+    echo "----------"    >> $NGX_AUTOCONF_ERR
+    echo $ngx_test       >> $NGX_AUTOCONF_ERR
+    echo "----------"    >> $NGX_AUTOCONF_ERR
 done
 
 
-if [ $ngx_fmt = no ]; then
+if [ $ngx_format = no ]; then
     echo "$0: error: printf() $ngx_type format not found"
+
     exit 1
 fi
 
 
 if [ $ngx_ptr_size = 4 ]; then
-    fmtX="%0`expr 2 \* $ngx_ptr_size`"
+    ngx_fmt_x="%0`expr 2 \* $ngx_ptr_size`"
 else
-    fmtX="%"
+    ngx_fmt_x="%"
 fi
 
-ngx_fmt=`echo $ngx_fmt | sed -e "s/d/X/" -e "s/^%/$fmtX/"`
+ngx_format=`echo $ngx_format | sed -e "s/d/X/" -e "s/^%/$ngx_fmt_x/"`
 
-echo "$comma \"${ngx_fmt}\" used"
+echo "$ngx_comma \"${ngx_format}\" used"
 
 
 cat << END >> $NGX_AUTO_CONFIG_H
 
 #ifndef $ngx_fmt_name
-#define $ngx_fmt_name  "$ngx_fmt"
+#define $ngx_fmt_name  "$ngx_format"
 #endif
 
 END