diff --git a/Makefile.sharp b/Makefile.sharp
index 1780152..762787f 100644
--- a/Makefile.sharp
+++ b/Makefile.sharp
@@ -1,32 +1,29 @@
 
-# OPENSSL_DIR = ../openssl-1.0.0-beta2
-OPENSSL_DIR = ../openssl-0.9.8k
-SFMT_DIR	= ../SFMT-src-1.3.3
+# Linux 上でビルドする場合は、DEV_CYGWINをコメントアウトしてください。
+DEV_CYGWIN = TRUE
 
-USE_SFMT = TRUE
+TARGET  = gen_id
 
-
-
-TARGET	    = gen_id
-
-SRCS	= main.c cr_generate_id.c cr_alloc.c cr_gen_id_rsa_key_priv.c cr_gen_id_rsa_key_pub.c $(SFMT_DIR)/SFMT.c 
+SRCS	= main.c
 
 OBJS	= $(notdir $(SRCS:.c=.o))
 
-CC	:= C:/Cygwin/bin/gcc
+ifeq ($(DEV_CYGWIN),TRUE)
 
-CFLAGS	= -mno-cygwin -Wall
+CC      := C:/Cygwin/bin/gcc
+LD	     = C:/Cygwin/bin/gcc
+CFLAGS	+= -mno-cygwin -DDEV_CYGWIN -Wall -I./
+LDFLAGS	+= -Wl,--subsystem,console -mwindows -mno-cygwin  -L./
+LDLIBS	+= -l_gen_id
 
-ifeq ($(USE_SFMT),TRUE)
-CFLAGS	+= -DUSE_SFMT -DMEXP=216091  -msse2 -DHAVE_SSE2 
-endif
+else # DEV_CYGWIN
 
-CPPFLAGS= -I. -I$(OPENSSL_DIR)/include -I$(OPENSSL_DIR)/crypto/ec -I$(SFMT_DIR)
-
-LD	= C:/Cygwin/bin/gcc
-LDFLAGS	= -Wl,--subsystem,console -mwindows -mno-cygwin -L$(OPENSSL_DIR)
-LDLIBS	= -lcrypto -lssl
+CC      := /usr/bin/gcc
+LD	     = /usr/bin/gcc
+LDFLAGS	+= -Wl -L./
+LDLIBS	+= -ldl -lnsl -l_gen_id
 
+endif # DEV_CYGWIN
 
 .SUFFIXES:
 
@@ -35,11 +32,6 @@ all: $(TARGET)
 $(TARGET): $(OBJS) 
 	$(LD) $(LDFLAGS) $(OBJS) -o $@ $(LDLIBS)
 
-$(OBJS): $(HEADS) Makefile
-
-%.o:$(SFMT_DIR)/%.c
-	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
-
 %.o:%.c
 	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
 
diff --git a/main.c b/main.c
index 9a5cccf..fec6f57 100644
--- a/main.c
+++ b/main.c
@@ -5,7 +5,6 @@
 #include <string.h>
 #include <time.h>
 #include <sys/time.h>
-#include <openssl/err.h>
 
 #ifdef DEV_CYGWIN
 #include <conio.h>