Aws-sdk-cpp: CMake fail to build on Amazon Linux

[SooLee]

What platform/OS are you using?

Amazon Linux (RHEL/CentOS-like)

What compiler are you using? what version?

gcc48-c++.x86_64

What's your CMake arguments?

cmake .

Can you provide a TRACE level log? (sanitize any sensitive information)

CMake Warning at CMakeLists.txt:21 (message):
  Building with CMake 3.0 or higher is strongly suggested; current version is
  2.8.12


-- Found Git: /usr/bin/git (found version "2.13.6") 
-- 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: 1.4.33
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_VERSION_COMPILER_ENV_VAR
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_VERSION_COMPILER
CMake Error: Could not find cmake module file: /home/ec2-user/aws-sdk-cpp/CMakeFiles/2.8.12.2/CMakeVERSIONCompiler.cmake
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_1.4.33_COMPILER_ENV_VAR
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_1.4.33_COMPILER
CMake Error: Could not find cmake module file: /home/ec2-user/aws-sdk-cpp/CMakeFiles/2.8.12.2/CMake1.4.33Compiler.cmake
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_LANGUAGES_COMPILER_ENV_VAR
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_LANGUAGES_COMPILER
CMake Error: Could not find cmake module file: /home/ec2-user/aws-sdk-cpp/CMakeFiles/2.8.12.2/CMakeLANGUAGESCompiler.cmake
-- The CXX compiler identification is GNU 4.8.5
CMake Error: Could not find cmake module file: CMakeVERSIONInformation.cmake
CMake Error: Could not find cmake module file: CMake1.4.33Information.cmake
CMake Error: Could not find cmake module file: CMakeLANGUAGESInformation.cmake

[singku]

Hi, thanks for reporting this problem to us.
Based on the error output you supplied above, you were using 2.8.12 version of CMake, which may cause problems, so it's not recommended by us.
See here:
https://github.com/aws/aws-sdk-cpp/blob/60739e5b04629bb91149296d3f84309ff741c9be/CMakeLists.txt#L18

Is that possible for you to update CMake on Amazon Linux and try again?

[SooLee]

Ok great - it works with cmake 3.0.0. Thanks for the quick response!

One minor suggestion:
The latest version you can get through yum install is 2.8, so I had to do something like sudo rpm -Uv ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/Application:/Geo/CentOS_6/x86_64/cmake-3.0.0-143.1.x86_64.rpm
So, updating the README/documentation to provide cmake version info would be helpful.

Thanks again!