Openssl for uclinux
Software Enviroment
OpenSuse 10.0 Linux
arm-elf toolchains
OpenSSL ： 0.9.7c
Compiling
1．donwload OpenSSL 0.9.7c from openssl.org2. download the patch for uclinux:
http://ftp.snapgear.org/pub/patches/openssl-0.9.7c.diff
http://ftp.snapgear.org/pub/patches/openssl-0.9.7c_linux_include.diff
http://ftp.snapgear.org/pub/patches/openssl-0.9.7c_makefile.diff
install openssl（we assume the current working directory: uClinux-dist）:
cd lib
tar zxvf ~/tmp/openssl-0.9.7c.tar.gz
mv openssl-0.9.7c libssl
cd libssl
patch -p1 < ~/tmp/openssl.diff
patch the linux kernel：
cd linux-2.4.x/include/openssl
patch -p0 < ~/tmp/openssl_linux_include.diff
patch the openssl makefile.
cd user/openssl
patch -p0 < ~/tmp/openssl_makefile.diff
3． run the configure under the openssl source directory
./configure linux-elf-arm no-shared
4．modify Makefile
replace CC = gcc with CC = arm-elf-gcc
add “-D__PIC__ -fpic -msingle-pic-base -Wl,-elf2flt” to CFLAGS
5． make
6. now we have libssl.a and libcrypto.a in the source directory
7．copy the include and lib files to the arm-elf toolchains directory
Add the Openssl lib in your applications
add “-D__PIC__ -fpic -msingle-pic-base -Wl,-elf2flt” to the CFLAGS，
add –lssl –lcrypto to LDFLAGS
that is all 