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I have an old embedded board that supports only Debian Lenny. I need to install OpenSSL-1.0.1e on it. If I download the source code then try to compile the source code, I get this error

ts7500:/home/openssl-1.0.1e# make
making all in crypto...
make[1]: Entering directory `/home/openssl-1.0.1e/crypto'
In file included from armcap.c:8:
arm_arch.h:35:5: error: #error "unsupported ARM architecture"
make[1]: *** [armcap.o] Error 1
make[1]: Leaving directory `/home/openssl-1.0.1e/crypto'
make: *** [build_crypto] Error 1

how can I overcome that error?

Note: ts7500:/home/openssl-1.0.1e# `uname -a`
Linux ts7500 3.4.0 #83 Sun May 26 17:07:14 CEST 2013 `armv4l GNU/Linux`

ARMV4 is defined on https://github.com/joyent/node/blob/89dcf22/deps/openssl/openssl/crypto/arm_arch.h

EDIT: If I add #define __ARM_ARCH__ 4 in the beginning of the library, it suppress the problem and compiles the code without any problem. I wonder how correct what I did. I would appreciate a better solution (e.g., without modifying the library)

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+1, just wanted to say thanks for posting your workaround here. I couldn't get the accepted answer to work in my environment (compiling for DNS-323), but the #define line seems to have done the trick. – Dominic P Oct 10 '14 at 7:54
up vote 2 down vote accepted

You haven't passed the right options to Configure. Make sure to pass the argument linux-armv4. If you're cross-compiling, in addition to armv4, you need to pass the path to the cross-compiler, as well as include and library paths if necessary.

./Configure --cross-compiler-prefix=/opt/gcc-arm/bin/arm-linux-gnueabi- -I/opt/gcc-arm/include -L/opt/gcc-arm/lib
share|improve this answer
Gilles, Thanks a lot!! I wish I could upvote more, it was really useful help. – sven Jun 8 '13 at 22:41

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