diff --git a/auto/cc b/auto/cc
index 2079311..d1cdea4 100644
--- a/auto/cc
+++ b/auto/cc
@@ -7,19 +7,30 @@
          # optimization
          #CFLAGS="$CFLAGS -O2 -fomit-frame-pointer"
 
-         case $CPU_OPT in
+         case $CPU in
              pentiumpro)
                  # optimize for Pentium Pro, Pentium II and Pentium III
-                 LIB_OPT="-march=pentiumpro"
+                 CPU_OPT="-march=pentiumpro"
              ;;
              pentium4)
                  # optimize for Pentium 4, gcc 3.x
-                 LIB_OPT="-march=pentium4"
+                 CPU_OPT="-march=pentium4"
              ;;
          esac
 
-         CFLAGS="$CFLAGS $LIB_OPT"
-         ZLIB_OPT="-O2 -fomit-frame-pointer $LIB_OPT"
+         CFLAGS="$CFLAGS $CPU_OPT"
+
+         if [ $PCRE_OPT = NO ]; then
+             PCRE_OPT="CFLAGS=\"-O2 -fomit-frame-pointer $CPU_OPT\""
+         fi
+
+         if [ $MD5_OPT = NO ]; then
+             MD5_OPT="CFLAGS=\"-O2 -fomit-frame-pointer $CPU_OPT\""
+         fi
+
+         if [ $ZLIB_OPT = NO ]; then
+             ZLIB_OPT="CFLAGS=\"-O2 -fomit-frame-pointer $CPU_OPT $ZLIB_ASMV\""
+         fi
 
          # warnings
          CFLAGS="$CFLAGS -O -W"
@@ -57,19 +68,35 @@
 
          # optimization
          CFLAGS="$CFLAGS -O"
+         # inline functions declared with __inline
+         CFLAGS="$CFLAGS -Ob1"
+         # inline any function, at the compiler's discretion
+         #CFLAGS="$CFLAGS -Ob2"
 
-         case $CPU_OPT in
+         case $CPU in
              pentiumpro)
                  # optimize for Pentium Pro, Pentium II and Pentium III
-                 LIB_OUT="-mcpu=pentiumpro -march=pentiumpro"
+                 CPU_OPT="-mcpu=pentiumpro -march=pentiumpro"
              ;;
              pentium4)
                  # optimize for Pentium 4, default
-                 LIB_OPT="-march=pentium4"
+                 CPU_OPT="-march=pentium4"
              ;;
          esac
 
-         CFLAGS="$CFLAGS $LIB_OUT"
+         CFLAGS="$CFLAGS $CPU_OPT"
+
+         if [ $PCRE_OPT = NO ]; then
+             PCRE_OPT="CFLAGS=\"-O $CPU_OPT\""
+         fi
+
+         if [ $MD5_OPT = NO ]; then
+             MD5_OPT="CFLAGS=\"-O $CPU_OPT\""
+         fi
+
+         if [ $ZLIB_OPT = NO ]; then
+             ZLIB_OPT="CFLAGS=\"-O $CPU_OPT $ZLIB_ASMV\""
+         fi
 
          # warnings
          CFLAGS="$CFLAGS -w1"
@@ -108,18 +135,18 @@
          # disable stack checking calls
          CFLAGS="$CFLAGS -Gs"
 
-         case $CPU_OPT in
+         case $CPU in
              pentiumpro)
                  # optimize for Pentium Pro, Pentium II and Pentium III
-                 LIB_OUT="-G6"
+                 CPU_OPT="-G6"
              ;;
              pentium4)
                  # optimize for Pentium 4
-                 #LIB_OUT="-G7"
+                 #CPU_OPT="-G7"
              ;;
          esac
 
-         CFLAGS="$CFLAGS $LIB_OUT"
+         CFLAGS="$CFLAGS $CPU_OPT"
 
          # warnings
          CFLAGS="$CFLAGS -W3"
@@ -184,17 +211,17 @@
          # disable stack checking calls
          CFLAGS="$CFLAGS -s"
 
-         case $CPU_OPT in
+         case $CPU in
              pentiumpro)
                  # optimize for Pentium Pro, Pentium II and Pentium III
                  # register-based arguments passing conventions
-                 LIB_OUT="-6r"
+                 CPU_OPT="-6r"
                  # stack-based arguments passing conventions
-                 #LIB_OUT="-6s"
+                 #CPU_OPT="-6s"
              ;;
          esac
 
-         CFLAGS="$CFLAGS $LIB_OUT"
+         CFLAGS="$CFLAGS $CPU_OPT"
 
          # warnings
          #CFLAGS="$CFLAGS -w3"
diff --git a/auto/lib/md5/make b/auto/lib/md5/make
index d75a301..1cca3ad 100644
--- a/auto/lib/md5/make
+++ b/auto/lib/md5/make
@@ -31,24 +31,34 @@
 
         cp auto/lib/md5/$makefile $MD5
         echo "	cd $MD5"                                          >> $MAKEFILE
-        echo "	\$(MAKE) -f $makefile LIB_OPT=$LIB_OPT"           >> $MAKEFILE
+        echo $ngx_n "	\$(MAKE) -f $makefile" $ngx_c             >> $MAKEFILE
+        echo " CPU_OPT=$CPU_OPT MD5_ASM=$MD5_ASM"                 >> $MAKEFILE
         echo "	cd ..\\..\\.."                                    >> $MAKEFILE
     ;;
 
     SunOS:*:i86pc)
-        echo "	cd $MD5 && \$(MAKE) x86-solaris"                  >> $MAKEFILE
+        if [ $MD5_ASM = YES ]; then
+            echo "	cd $MD5 && \$(MAKE) $MD5_OPT x86-solaris" >> $MAKEFILE
+        else
+            echo "	cd $MD5 \\"                               >> $MAKEFILE
+            echo "	&& \$(MAKE) $MD5_OPT \\"                  >> $MAKEFILE
+            echo "		MD5_ASM_OBJ= CC=$CC all"          >> $MAKEFILE
+        fi
     ;;
 
     *:i386)
-        echo "	cd $MD5 && \$(MAKE) x86-elf"                      >> $MAKEFILE
+        if [ $MD5_ASM = YES ]; then
+            echo "	cd $MD5 && \$(MAKE) $MD5_OPT x86-elf"     >> $MAKEFILE
+        else
+            echo "	cd $MD5 \\"                               >> $MAKEFILE
+            echo "	&& \$(MAKE) $MD5_OPT \\"                  >> $MAKEFILE
+            echo "		MD5_ASM_OBJ= CC=$CC all"          >> $MAKEFILE
+        fi
     ;;
 
     *)
-        if [ $CC = gcc ]; then
-            echo "	cd $MD5 && \$(MAKE) gcc"                  >> $MAKEFILE
-        else
-            echo "	cd $MD5 && \$(MAKE) cc"                   >> $MAKEFILE
-        fi
+        echo "	cd $MD5 \\"                                       >> $MAKEFILE
+        echo "	&& \$(MAKE) $MD5_OPT MD5_ASM_OBJ= CC=$CC all"     >> $MAKEFILE
     ;;
 
 esac
diff --git a/auto/lib/md5/makefile.msvc b/auto/lib/md5/makefile.msvc
index ad719c0..65ca4ab 100644
--- a/auto/lib/md5/makefile.msvc
+++ b/auto/lib/md5/makefile.msvc
@@ -1,6 +1,16 @@
 
-CFLAGS = -nologo -c -MT -O2 -Ob1 -Oi -Gs $(LIB_OPT) -D MD5_ASM -D L_ENDIAN
+CFLAGS = -nologo -c -MT -O2 -Ob1 -Oi -Gs $(CPU_OPT) -D L_ENDIAN
+
+!if "$(MD5_ASM)" == "YES"
+
+md5.lib:
+	cl $(CFLAGS) -D MD5_ASM md5_dgst.c
+	link -lib -out:md5.lib md5_dgst.obj asm/m-win32.obj
+
+!else
 
 md5.lib:
 	cl $(CFLAGS) md5_dgst.c
-	link -lib -out:md5.lib md5_dgst.obj asm/m-win32.obj
+	link -lib -out:md5.lib md5_dgst.obj
+
+!endif
diff --git a/auto/lib/md5/makefile.owc b/auto/lib/md5/makefile.owc
index f02a742..2cb6b65 100644
--- a/auto/lib/md5/makefile.owc
+++ b/auto/lib/md5/makefile.owc
@@ -1,5 +1,5 @@
 
-CFLAGS = -c -zq -bt=nt -bm -ot -op -oi -oe -s $(LIB_OPT)
+CFLAGS = -c -zq -bt=nt -bm -ot -op -oi -oe -s $(CPU_OPT)
 
 md5.lib:
 	wcl386 $(CFLAGS) -dL_ENDIAN md5_dgst.c
diff --git a/auto/lib/pcre/make b/auto/lib/pcre/make
index 8bfd943..d4f658e 100644
--- a/auto/lib/pcre/make
+++ b/auto/lib/pcre/make
@@ -32,14 +32,14 @@
         cp auto/lib/pcre/patch.config $PCRE
         cp auto/lib/pcre/$makefile $PCRE
         echo "	cd $PCRE"                                         >> $MAKEFILE
-        echo "	\$(MAKE) -f $makefile LIB_OPT=$LIB_OPT"           >> $MAKEFILE
+        echo "	\$(MAKE) -f $makefile CPU_OPT=$CPU_OPT"           >> $MAKEFILE
         echo "	cd ..\\..\\.."                                    >> $MAKEFILE
     ;;
 
     *)
         echo "	cd $PCRE \\"                                      >> $MAKEFILE
-        echo $ngx_n "	&& CFLAGS=\"-O2 $LIB_OPT\"" $ngx_c        >> $MAKEFILE
-        echo " ./configure --disable-shared \\"                   >> $MAKEFILE
+        echo "	&& CC=$CC $PCRE_OPT \\"                           >> $MAKEFILE
+        echo "	./configure --disable-shared \\"                  >> $MAKEFILE
         echo "	&& \$(MAKE)"                                      >> $MAKEFILE
     ;;
 
diff --git a/auto/lib/pcre/makefile.msvc b/auto/lib/pcre/makefile.msvc
index f651968..778607c 100644
--- a/auto/lib/pcre/makefile.msvc
+++ b/auto/lib/pcre/makefile.msvc
@@ -1,5 +1,5 @@
 
-CFLAGS =	-O2 -Ob1 -Oi -Gs -MT $(LIB_OPT)
+CFLAGS =	-O2 -Ob1 -Oi -Gs -MT $(CPU_OPT)
 PCREFLAGS =	-DPCRE_STATIC -DPOSIX_MALLOC_THRESHOLD=10
 
 
diff --git a/auto/lib/pcre/makefile.owc b/auto/lib/pcre/makefile.owc
index 5c15e87..7066215 100644
--- a/auto/lib/pcre/makefile.owc
+++ b/auto/lib/pcre/makefile.owc
@@ -1,5 +1,5 @@
 
-CFLAGS =	-c -zq -bt=nt -ot -op -oi -oe -s -bm $(LIB_OPT)
+CFLAGS =	-c -zq -bt=nt -ot -op -oi -oe -s -bm $(CPU_OPT)
 PCREFLAGS =	-DPCRE_STATIC -DPOSIX_MALLOC_THRESHOLD=10
 
 
diff --git a/auto/lib/zlib/make b/auto/lib/zlib/make
index ff9ada0..50a6559 100644
--- a/auto/lib/zlib/make
+++ b/auto/lib/zlib/make
@@ -31,20 +31,28 @@
 
         cp auto/lib/zlib/$makefile $ZLIB
         echo "	cd $ZLIB"                                         >> $MAKEFILE
-        echo "	\$(MAKE) -f $makefile LIB_OPT=$LIB_OPT"           >> $MAKEFILE
+        echo "	\$(MAKE) -f $makefile CPU_OPT=$CPU_OPT"           >> $MAKEFILE
         echo "	cd ..\\..\\.."                                    >> $MAKEFILE
     ;;
 
 
     *:i386 | *:i686)
-        echo "	cd $ZLIB \\"                                      >> $MAKEFILE
-        echo "	&& cp contrib/asm686/match.S . \\"                >> $MAKEFILE
-        echo "	&& CFLAGS=\"-O3 -DASMV\" ./configure \\"          >> $MAKEFILE
-        echo "	&& \$(MAKE) OBJA=match.o"                         >> $MAKEFILE
+        if [ $ZLIB_ASM = pentiumpro ]; then
+            echo "	cd $ZLIB \\"                              >> $MAKEFILE
+            echo "	&& cp contrib/asm686/match.S . \\"        >> $MAKEFILE
+            echo "	&& CC=$CC $ZLIB_OPT ./configure \\"       >> $MAKEFILE
+            echo "	&& \$(MAKE) OBJA=match.o"                 >> $MAKEFILE
+        else
+            echo "	cd $ZLIB \\"                              >> $MAKEFILE
+            echo "	&& CC=$CC $ZLIB_OPT ./configure \\"       >> $MAKEFILE
+            echo "	&& \$(MAKE)"                              >> $MAKEFILE
+        fi
     ;;
 
     *)
-        echo "	cd $ZLIB && ./configure && \$(MAKE)"              >> $MAKEFILE
+        echo "	cd $ZLIB \\"                                      >> $MAKEFILE
+        echo "	&& CC=$CC $ZLIB_OPT ./configure \\"               >> $MAKEFILE
+        echo "	&& \$(MAKE)"                                      >> $MAKEFILE
     ;;
 
 esac
diff --git a/auto/lib/zlib/makefile.msvc b/auto/lib/zlib/makefile.msvc
index 1d38c5b..ebb11d3 100644
--- a/auto/lib/zlib/makefile.msvc
+++ b/auto/lib/zlib/makefile.msvc
@@ -1,5 +1,5 @@
 
-CFLAGS = -nologo -c -MT -O2 -Ob1 -Oi -Gs $(LIB_OPT)
+CFLAGS = -nologo -c -MT -O2 -Ob1 -Oi -Gs $(CPU_OPT)
 
 zlib.lib:
 	cl $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c
diff --git a/auto/lib/zlib/makefile.owc b/auto/lib/zlib/makefile.owc
index 1a2823b..e119bb9 100644
--- a/auto/lib/zlib/makefile.owc
+++ b/auto/lib/zlib/makefile.owc
@@ -1,5 +1,5 @@
 
-CFLAGS = -c -zq -bt=nt -ot -op -oi -oe -s -bm $(LIB_OPT)
+CFLAGS = -c -zq -bt=nt -ot -op -oi -oe -s -bm $(CPU_OPT)
 
 zlib.lib:
 	wcl386 $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c
diff --git a/auto/options b/auto/options
index 303292d..07263c9 100644
--- a/auto/options
+++ b/auto/options
@@ -4,7 +4,7 @@
 CC=gcc
 OBJS=objs
 
-CPU_OPT=NO
+CPU=NO
 
 TEST_BUILD_DEVPOLL=NO
 TEST_BUILD_EPOLL=NO
@@ -26,12 +26,17 @@
 
 USE_PCRE=NO
 PCRE=NONE
+PCRE_OPT=NO
 
 USE_MD5=NO
 MD5=NONE
+MD5_OPT=NO
+MD5_ASM=NO
 
 USE_ZLIB=NO
 ZLIB=NONE
+ZLIB_OPT=NO
+ZLIB_ASM=NO
 
 
 for option
@@ -64,13 +69,19 @@
         --without-http_proxy_module)     HTTP_PROXY=NO              ;;
 
         --with-cc=*)                     CC="$value"                ;;
-        --with-cpu=*)                    CPU_OPT="$value"           ;;
+        --with-cpu-opt=*)                CPU="$value"               ;;
 
         --without-pcre)                  USE_PCRE=DISABLED          ;;
         --with-pcre=*)                   PCRE="$value"              ;;
+        --with-pcre-opt=*)               PCRE_OPT="$value"          ;;
+
         --with-md5=*)                    MD5="$value"               ;;
+        --with-md5-opt=*)                MD5_OPT="$value"           ;;
+        --with-md5-asm)                  MD5_ASM=YES                ;;
+
         --with-zlib=*)                   ZLIB="$value"              ;;
         --with-zlib-opt=*)               ZLIB_OPT="$value"          ;;
+        --with-zlib-asm=*)               ZLIB_ASM="$value"          ;;
 
         --test-build-devpoll)            TEST_BUILD_DEVPOLL=YES     ;;
         --test-build-epoll)              TEST_BUILD_EPOLL=YES       ;;
@@ -106,3 +117,8 @@
 
     exit 1
 fi
+
+
+if [ $ZLIB_ASM != NO ]; then
+    ZLIB_ASMV=-DASMV
+fi