# ./Configure linux-elf -march=pentium

# make
making all in crypto...
make[1]: Entering directory `/home/xyz/Downloads/ssltest/openssl-1.0.0d/crypto'
( echo "#ifndef MK1MF_BUILD"; \
echo '  /* auto-generated by crypto/Makefile for crypto/cversion.c */'; \
echo '  #define CFLAGS "gcc -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -march=pentium -DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_PART_WORDS -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM -DWHIRLPOOL_ASM"'; \
echo '  #define PLATFORM "linux-elf"'; \
echo "  #define DATE \"`LC_ALL=C LC_TIME=C date`\""; \
echo '#endif' ) >buildinf.h
gcc -I. -I.. -I../include  -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -march=pentium -DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_PART_WORDS -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM -DWHIRLPOOL_ASM   -c -o cryptlib.o cryptlib.c
cryptlib.c:1:0: error: CPU you selected does not support x86-64 instruction set
cryptlib.c:1:0: error: CPU you selected does not support x86-64 instruction set
make[1]: *** [cryptlib.o] Error 1
make[1]: Leaving directory `/home/xyz/Downloads/ssltest/openssl-1.0.0d/crypto'
make: *** [build_crypto] Error 1

##</code><code>##

# ./Configure linux-elf -march=x86-64

# make
making all in crypto...
make[1]: Entering directory `/home/xyz/Downloads/ssltest/openssl-1.0.0d/crypto'
gcc -I. -I.. -I../include  -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -march=x86-64 -DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_PART_WORDS -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DRMD160_ASM -DAES_ASM -DWHIRLPOOL_ASM -c  -o x86cpuid.o x86cpuid.s
x86cpuid.s: Assembler messages:
x86cpuid.s:8: Error: invalid instruction suffix for `push'
x86cpuid.s:9: Error: invalid instruction suffix for `push'
x86cpuid.s:10: Error: invalid instruction suffix for `push'
x86cpuid.s:11: Error: invalid instruction suffix for `push'
x86cpuid.s:13: Error: invalid instruction suffix for `pushf'
x86cpuid.s:14: Error: invalid instruction suffix for `pop'
x86cpuid.s:17: Error: invalid instruction suffix for `push'
x86cpuid.s:18: Error: invalid instruction suffix for `popf'
x86cpuid.s:19: Error: invalid instruction suffix for `pushf'
x86cpuid.s:20: Error: invalid instruction suffix for `pop'
x86cpuid.s:99: Error: invalid instruction suffix for `pop'
x86cpuid.s:100: Error: invalid instruction suffix for `pop'
x86cpuid.s:101: Error: invalid instruction suffix for `pop'
x86cpuid.s:102: Error: invalid instruction suffix for `pop'
x86cpuid.s:130: Error: invalid instruction suffix for `pushf'
x86cpuid.s:131: Error: invalid instruction suffix for `pop'
x86cpuid.s:135: Error: invalid instruction suffix for `push'
x86cpuid.s:136: Error: invalid instruction suffix for `push'
x86cpuid.s:153: Error: invalid instruction suffix for `pushf'
x86cpuid.s:154: Error: invalid instruction suffix for `pop'
x86cpuid.s:209: Error: invalid instruction suffix for `push'
x86cpuid.s:218: Error: invalid instruction suffix for `pop'
x86cpuid.s:226: Error: invalid instruction suffix for `push'
x86cpuid.s:245: Error: invalid instruction suffix for `pop'
make[1]: *** [x86cpuid.o] Error 1
make[1]: Leaving directory `/home/xyz/Downloads/ssltest/openssl-1.0.0d/crypto'
make: *** [build_crypto] Error 1