Change CMake package name of C library to msgpackc

[traversaro]

Change the CMake package name to msgpackc, as requested in #1043 (comment) . After this change, to find the C library in the system, it is necessary to call:

find_package(msgpackc REQUIRED)

instead of the previously used:

find_package(msgpack REQUIRED)

Fix #1043 .

[traversaro]

AppVeyor build is failing with:

-- Build files have been written to: C:/projects/msgpack-c/googletest-release-1.7.0/build
cmake --build . --config Release
Microsoft (R) Build Engine version 4.8.3761.0
[Microsoft .NET Framework, version 4.0.30319.42000]
Copyright (C) Microsoft Corporation. All rights reserved.
  Checking Build System
  Building Custom Rule C:/projects/msgpack-c/googletest-release-1.7.0/CMakeLists.txt
  gtest-all.cc
     Creating library C:/projects/msgpack-c/googletest-release-1.7.0/build/Release/gtest.lib and object C:/projects/msgpack-c/googletest-release-1.7.0/build/Release/gtest.exp
  gtest.vcxproj -> C:\projects\msgpack-c\googletest-release-1.7.0\build\Release\gtest.dll
  Building Custom Rule C:/projects/msgpack-c/googletest-release-1.7.0/CMakeLists.txt
  gtest_main.cc
     Creating library C:/projects/msgpack-c/googletest-release-1.7.0/build/Release/gtest_main.lib and object C:/projects/msgpack-c/googletest-release-1.7.0/build/Release/gtest_main.exp
  gtest_main.vcxproj -> C:\projects\msgpack-c\googletest-release-1.7.0\build\Release\gtest_main.dll
  Building Custom Rule C:/projects/msgpack-c/googletest-release-1.7.0/CMakeLists.txt
cd ..
cd ..
appveyor DownloadFile http://zlib.net/zlib-1.2.12.tar.gz -FileName zlib-1.2.12.tar.gz
Error downloading remote file: One or more errors occurred.
Inner Exception: Remote server returned 404: Not Found

That does not seem related to this PR.

[redboltz]

I guess that you need to update zlib on appveyor.

https://github.com/msgpack/msgpack-c/blob/c_master/appveyor.yml#L25
And other lines.

The current version is zlib 1.2.13

[redboltz]

Still 1.2.12 code is remained in appveyor.yml. Please search "1.2.12" and replace them.

[codecov-commenter]

Codecov Report

Merging #1044 (5ae6077) into c_master (c3df1bb) will not change coverage.
The diff coverage is n/a.

❗ Current head 5ae6077 differs from pull request most recent head 52fa748. Consider uploading reports for the commit 52fa748 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##           c_master    #1044   +/-   ##
=========================================
  Coverage     55.45%   55.45%           
=========================================
  Files             8        8           
  Lines          1044     1044           
=========================================
  Hits            579      579           
  Misses          465      465           

[traversaro]

The CI is green. The only job that failed is " CI / linux (5) (pull_request) Failing after 1m ", but that is an error independent from the PR, and will probably go away if you restart the job (see actions/runner-images#675).

[redboltz]

Thanks, I restarted CI and finally got all green. I will merge it.