[Libwebsockets] CMAKE error with while doing MIPS cross-compilation on x86 with OPENSSL support

"Andy Green (林安廸)" andy at warmcat.com
Tue Oct 15 01:16:56 CEST 2013


On 12/10/13 08:29, the mail apparently from Hemant Kumar included:
> Hi Andy
>
> Thanks for reverting back.
>
> I did checked the soft link does point to valid openssl lib .
>
>
> bash-4.1$ ls -ltr /home/hkumar/adu/build/hkumar6.4/Default/nebbiolo/openssl-regular/openssl-1.0.1c/nebbiolo_obj/
> total 8244
> -rwxr-xr-x 1 hkumar sg-hw 5683606 Oct  9 11:22 libcrypto.so.1.0.0
> lrwxrwxrwx 1 hkumar sg-hw      18 Oct  9 11:22 libcrypto.so.0 -> libcrypto.so.1.0.0
> lrwxrwxrwx 1 hkumar sg-hw      18 Oct  9 11:22 libcrypto.so -> libcrypto.so.1.0.0
> -rwxr-xr-x 1 hkumar sg-hw 1523416 Oct  9 11:22 libssl.so.1.0.0
> lrwxrwxrwx 1 hkumar sg-hw      15 Oct  9 11:22 libssl.so.0 -> libssl.so.1.0.0
> lrwxrwxrwx 1 hkumar sg-hw      15 Oct  9 11:22 libssl.so -> libssl.so.1.0.0
> -rwxr-xr-x 1 hkumar sg-hw 1229985 Oct  9 11:22 openssl
>
> Also , I executed following command:
> bash-4.1$ cmake ..  -DZLIB_LIBRARY="/home/hkumar/adu/views/hkumar6.4/utils/zlib/nebbiolo_obj/libz.a" -DZLIB_INCLUDE_DIR="/home/hkumar/adu/views/hkumar6.4/utils/zlib/" -DOPENSSL_ROOT_DIR="/home/hkumar/adu/views/hkumar6.4/openssl-regular/openssl-1.0.1c/ssl" -DOPENSSL_LIBRARIES="/home/hkumar/adu/build/hkumar6.4/Default/nebbiolo/openssl-regular/openssl-1.0.1c/nebbiolo_obj/ libssl.so " -DOPENSSL_INCLUDE_DIR="/home/hkumar/adu/views/hkumar6.4/openssl-regular/openssl-1.0.1c/include/"  -DWITH_SSL=1 -DCMAKE_TOOLCHAIN_FILE=../cross-mips-linux-gnueabihf.cmake
>
> Still I get the same error, any other suggestion.

If it was happening to me I would be tempted to comment the requirement 
to find OpenSSL in the CMakeLists.txt, and see if I get a more 
informative error when I proceeded to build.

Either that or strace the cmake and look at what it was trying to find 
before it blew the error.

-Andy

> Thanks a ton
> Hemant
>
> -----Original Message-----
> From: Andy Green [mailto:extracats at googlemail.com] On Behalf Of "Andy Green (???)"
> Sent: Friday, October 11, 2013 5:13 PM
> To: Hemant Kumar
> Cc: libwebsockets at ml.libwebsockets.org
> Subject: Re: [Libwebsockets] CMAKE error with while doing MIPS cross-compilation on x86 with OPENSSL support
>
> On 12/10/13 01:37, the mail apparently from Hemant Kumar included:
>> Hi
>>
>> I am getting following error when I try to cross-compile libwebsockets
>> with cmake.
>>
>> I have created cross-compilation file with following content:
>>
>> # Name of C compiler.
>> set(CMAKE_C_COMPILER "${CROSS_PATH}/bin/mipsisa32-xlr-linux-gcc")
>> set(CMAKE_CXX_COMPILER "${CROSS_PATH}/bin/mipsisa32-xlr-linux-g++")
>>
>>
>> -- Looking for zlib.h
>> -- Looking for zlib.h - not found
>> -- Looking for 4 include files stdlib.h, ..., float.h
>> -- Looking for 4 include files stdlib.h, ..., float.h - found
>> -- Found ZLIB:
>> /home/hkumar/adu/views/hkumar6.4/utils/zlib/nebbiolo_obj/libz.a (found
>> version "1.1.4") ZLib include dirs:
>> /home/hkumar/adu/views/hkumar6.4/utils/zlib
>> ZLib libraries:
>> /home/hkumar/adu/views/hkumar6.4/utils/zlib/nebbiolo_obj/libz.a
>> Compiling with SSL support
>> CMake Error at
>> /usr/local/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake
>> :108
>> (message):
>> * Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
>>     system variable OPENSSL_ROOT_DIR (missing: OPENSSL_LIBRARIES) (found
>>     version "1.0.0")
>> Call Stack (most recent call first*):
>>
>> /usr/local/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake
>> :315
>> (_FPHSA_FAILURE_MESSAGE)
>>     /usr/local/share/cmake-2.8/Modules/FindOpenSSL.cmake:303
>> (find_package_handle_standard_args)
>>     CMakeLists.txt:442 (find_package)
>>
>> Using following command:
>>
>> I am providing the .so location for mips Netlogic XLR platform
>> cross-compiled for OPENSSL library and also header files. It detect
>> the header files and as we can see above says 1.0.0 as version, but
>> fails to acknowledge the ssl library and room directory.
>>
>> bash-4.1$ cmake ..
>> -DZLIB_LIBRARY="/home/hkumar/hkumar6.4/utils/zlib/nebbiolo_obj/libz.a"
>> -DZLIB_INCLUDE_DIR="/home/hkumar/hkumar6.4/utils/zlib/"
>> -DOPENSSL_ROOT_DIR="/home/hkumar/hkumar6.4/openssl-regular/openssl-1.0.1c/"
>
> Just some guesses...
>
> Is your OpenSSL also static?  That's not supported in our CMake at the moment
>
>           else()
>                   # TODO: Add support for STATIC also.
>                   find_package(OpenSSL REQUIRED)
>
>                   message("OpenSSL include dir: ${OPENSSL_INCLUDE_DIR}")
>                   message("OpenSSL libraries: ${OPENSSL_LIBRARIES}")
>
>
>                 include_directories(${OPENSSL_INCLUDE_DIR})
>                   list(APPEND LIB_LIST${OPENSSL_LIBRARIES})
>           endif()
>
>> -DOPENSSL_LIBRARIES="/home/hkumar/hkumar6.4/Default/nebbiolo/openssl-regular/openssl-1.0.1c/libssl.so"
>
> This path definitely exists... if libssl.so is a symlink, does what it points to exist?
>
>> -DOPENSSL_INCLUDE_DIR="/home/hkumar/hkumar6.4/openssl-regular/openssl-1.0.1c/include/openssl"
>
> Also this path the references to OpenSSL headers in the source are like #include <openssl/ssl.h>.  So you may not want to give the final /openssl in the path.
>
> -Andy
>
>> -DWITH_SSL=1
>> -DCMAKE_TOOLCHAIN_FILE=../cross-mips-linux-gnueabihf.cmake
>>
>> Please help me resolve this issue.
>>
>> Thanks
>>
>>
>>
>> _______________________________________________
>> Libwebsockets mailing list
>> Libwebsockets at ml.libwebsockets.org
>> http://ml.libwebsockets.org/mailman/listinfo/libwebsockets
>>
>




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