Error while compiling program

[ShikharJ]

What platform/OS are you using?

Ubuntu 18.04

What compiler are you using? what version?

g++ 7.3.0

Error Output:

/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_global_cleanup@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_easy_getinfo@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_global_init@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_easy_perform@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_easy_init@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_slist_free_all@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_easy_setopt@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_slist_append@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_easy_cleanup@CURL_OPENSSL_4'
/usr/local/lib/libaws-cpp-sdk-core.so: undefined reference to `curl_easy_reset@CURL_OPENSSL_4'

This issue persists even after installing the latest curl and libcurl4-openssl-dev.

[marcomagdy]

How are you building the SDK?
paste your CMake arguments and output.

[ShikharJ]

CMake Arguments
After creating a build directory and entering it.
cmake -DBUILD_ONLY="s3;sqs" -DCMAKE_BUILD_TYPE=Release -DCUSTOM_MEMORY_MANAGEMENT=0 -DCPP_STANDARD=17 ..

CMake Output

-- Found Git: /usr/bin/git (found version "2.17.0") 
-- TARGET_ARCH not specified; inferring host OS to be platform compilation target
-- Building AWS libraries as shared objects
-- Generating linux build config
-- Building project version: 1.4.55
-- The CXX compiler identification is GNU 7.3.0
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.11") 
--   Zlib include directory: /usr/include
--   Zlib library: /usr/lib/x86_64-linux-gnu/libz.so
-- Encryption: Openssl
-- Found OpenSSL: /usr/lib/x86_64-linux-gnu/libcrypto.so (found version "1.1.0h") 
--   Openssl include directory: /usr/include
--   Openssl library: /usr/lib/x86_64-linux-gnu/libssl.so;/usr/lib/x86_64-linux-gnu/libcrypto.so
-- Http client: Curl
-- Found CURL: /usr/lib/x86_64-linux-gnu/libcurl.so (found version "7.58.0") 
--   Curl include directory: /usr/include/x86_64-linux-gnu
--   Curl library: /usr/lib/x86_64-linux-gnu/libcurl.so
-- Performing Test HAVE_ATOMICS_WITHOUT_LIBATOMIC
-- Performing Test HAVE_ATOMICS_WITHOUT_LIBATOMIC - Success
-- Considering s3
-- Considering sqs
-- The C compiler identification is GNU 7.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Updating version info to 1.4.55
-- Custom memory management disabled
-- Configuring done
-- Generating done
-- Build files have been written to: /home/shikhar/aws-sdk-cpp/build

[Bu11etmagnet]

Could you run make VERBOSE=1 and paste the link command that fails?

[ShikharJ]

@Bu11etmagnet I think I haven't been clear in my description. The make runs perfectly, but when I use the aws-sdk-cpp api in my cpp program, and then compile the program, it gives the mentioned error, not the aws-sdk-cpp build.

[singku]

Were you building sdk and your program under different users? Because if you successfully built and installed sdk, then cmake was able to find libcurl for you, but failed when you build your program. Could you paste your own cmake script ? And run `ldd /usr/local/lib/libaws-cpp-sdk-core.so` to see where does libcurl point to

On Fri, May 25, 2018 at 6:30 AM Shikhar Jaiswal ***@***.***> wrote: @Bu11etmagnet <https://github.com/Bu11etmagnet> I think I haven't been clear in my description. The make runs perfectly, but when I use the aws-sdk-cpp api in my cpp program, and then compile the program, it gives the mentioned error, not the aws-sdk-cpp build. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#882 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ADTsCFWg4SF0W7wsOlUGc8EMLFFF4pvkks5t2AeOgaJpZM4ULuwe> .

-- Best Regards! Liang. ------------------ Software Engineer Game Developer

[ShikharJ]

@singku Ah, thanks for that explanation, I think I've found the solution to my issue. Closing this.

[singku]

I am glad that you have found the solution. Could you please share your findings here so that others have the same problem could follow your solution.

On Sat, May 26, 2018 at 11:45 PM Shikhar Jaiswal ***@***.***> wrote: Closed #882 <#882>. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#882 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ADTsCISDYQp75Zpu8c6lR3kKC0RtwlPzks5t2kuigaJpZM4ULuwe> .

-- Best Regards! Liang. ------------------ Software Engineer Game Developer

[huangwei2913]

@ShikharJ Could you please share your findings, i met the problem as following
libaws-cpp-sdk-core.so: undefined reference to `curl_easy_getinfo@CURL_OPENSSL_4'

[hanxingf]

same problem, plz share your experience

[ShikharJ]

@hanxingf As far as I remember (this was over two years ago), I wasn't linking the libcurl file in the right manner when I was compiling my program. The issue crept up from there. I think you should try removing all instances of curl and libcurl4-openssl-dev, then re-installing from source, and linking.

[sanketkamta]

@hanxingf Well after i added the curl library in the linker properties, the file got build successfully. IDE = NetBeans.