交叉编译openssl（mipsel版）

系统平台：Ubuntu 16.04 64bit

目标平台：MT7688(主芯片)

交叉工具链：mipsel-openwrt-linux-

1. 源码下载地址：https://www.openssl.org/source/

2. 配置参数

./config no-asm

3. 修改Makefile

--- openssl/Makefile	2016-11-10 11:58:20.988039246 +0800
+++ openssl-1.0.2g/Makefile	2016-11-10 12:04:35.758891868 +0800
@@ -26,12 +26,10 @@
 # for, say, /usr/ and yet have everything installed to /tmp/somedir/usr/.
 # Normally it is left empty.
 INSTALL_PREFIX=
-#INSTALLTOP=/usr/local/ssl
-INSTALLTOP= /home/goockr/openssl_mipsel
+INSTALLTOP=/usr/local/ssl
 
 # Do not edit this manually. Use Configure --openssldir=DIR do change this!
-#OPENSSLDIR=/usr/local/ssl
-OPENSSLDIR= /home/goockr/openssl_mipsel
+OPENSSLDIR=/usr/local/ssl
 
 # NO_IDEA - Define to build without the IDEA algorithm
 # NO_RC4  - Define to build without the RC4 algorithm
@@ -61,8 +59,8 @@
 # equal 4.
 # PKCS1_CHECK - pkcs1 tests.
 
-CC= mipsel-openwrt-linux-gcc
-CFLAG= -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DL_ENDIAN -O3 -Wall
+CC= gcc
+CFLAG= -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -m64 -DL_ENDIAN -O3 -Wall
 DEPFLAG= -DOPENSSL_NO_EC_NISTP_64_GCC_128 -DOPENSSL_NO_GMP -DOPENSSL_NO_JPAKE -DOPENSSL_NO_LIBUNBOUND -DOPENSSL_NO_MD2 -DOPENSSL_NO_RC5 -DOPENSSL_NO_RFC3779 -DOPENSSL_NO_SCTP -DOPENSSL_NO_SSL_TRACE -DOPENSSL_NO_SSL2 -DOPENSSL_NO_STORE -DOPENSSL_NO_UNIT_TEST -DOPENSSL_NO_WEAK_SSL_CIPHERS
 PEX_LIBS= 
 EX_LIBS= -ldl

4. 编译和安装

​​​make;make install
/home/goockr/openssl_mipsel   为安装目录