double-conversion CI build compiler versions

[mbeach]

Description of Problem, Request, or Question

The builds of double-conversion/3.0.0 in bintray currently all have gcc and clang versions with a major and a minor version number.

This causes problems when attempting to use the package when the current approach of just the major version number being used to specify the compiler version (as described in conan-io/conan#1214), as pre-built packages will not be found.

The root cause seems to be the .travis.yml file specifying docker images by major and minor version number...

linux: &linux
   os: linux
   sudo: required
   language: python
   python: "3.6"
   services:
     - docker
osx: &osx
   os: osx
   language: generic
matrix:
   include:

      - <<: *linux
        env: CONAN_GCC_VERSIONS=4.9 CONAN_DOCKER_IMAGE=lasote/conangcc49
      - <<: *linux
        env: CONAN_GCC_VERSIONS=5.4 CONAN_DOCKER_IMAGE=lasote/conangcc54
      - <<: *linux
        env: CONAN_GCC_VERSIONS=6.3 CONAN_DOCKER_IMAGE=lasote/conangcc63
      - <<: *linux
        env: CONAN_CLANG_VERSIONS=3.9 CONAN_DOCKER_IMAGE=lasote/conanclang39
      - <<: *linux
        env: CONAN_CLANG_VERSIONS=4.0 CONAN_DOCKER_IMAGE=lasote/conanclang40
      - <<: *osx
        osx_image: xcode7.3
        env: CONAN_APPLE_CLANG_VERSIONS=7.3
      - <<: *osx
        osx_image: xcode8.3
        env: CONAN_APPLE_CLANG_VERSIONS=8.1
      - <<: *osx
        osx_image: xcode9
        env: CONAN_APPLE_CLANG_VERSIONS=9.0

install:
  - chmod +x .travis/install.sh
  - ./.travis/install.sh

script:
  - chmod +x .travis/run.sh
- ./.travis/run.sh

If we compare this with the .travis.yml file for (say) boost_thread/1.66.0 the compiler versions are more in line with what we would expect.

linux: &linux
   os: linux
   sudo: required
   language: python
   python: "3.6"
   services:
     - docker
osx: &osx
   os: osx
   language: generic
matrix:
   include:
      - <<: *linux
        env: CONAN_GCC_VERSIONS=4.9 CONAN_DOCKER_IMAGE=lasote/conangcc49
      - <<: *linux
        env: CONAN_GCC_VERSIONS=5 CONAN_DOCKER_IMAGE=lasote/conangcc5
      - <<: *linux
        env: CONAN_GCC_VERSIONS=6 CONAN_DOCKER_IMAGE=lasote/conangcc6
      - <<: *linux
        env: CONAN_GCC_VERSIONS=7 CONAN_DOCKER_IMAGE=lasote/conangcc7
      - <<: *linux
        env: CONAN_CLANG_VERSIONS=3.9 CONAN_DOCKER_IMAGE=lasote/conanclang39
      - <<: *linux
        env: CONAN_CLANG_VERSIONS=4.0 CONAN_DOCKER_IMAGE=lasote/conanclang40
      - <<: *osx
        osx_image: xcode7.3
        env: CONAN_APPLE_CLANG_VERSIONS=7.3
      - <<: *osx
        osx_image: xcode8.3
        env: CONAN_APPLE_CLANG_VERSIONS=8.1
      - <<: *osx
        osx_image: xcode9
        env: CONAN_APPLE_CLANG_VERSIONS=9.0

install:
  - chmod +x .travis/install.sh
  - ./.travis/install.sh

script:
  - chmod +x .travis/run.sh
- ./.travis/run.sh

I propose changing the .travis.yml file for double-conversion to be more in line with that for boost_thread (and the bincrafters template). Would a pull request with this change be acceptable?

[solvingj]

Indeed this was an issue. This recipe and all the supporting files were created from older templates, and all needed to be updated. I've gone ahead and refreshed all the files, and am pushing the updates through CI now. Stable branch should be done within an hour or two.

[mbeach]

Thanks very much!