Unsupported protocol while download tar.gz package

Question

I have just upgrade my CMake from version 2.8 to 3.2.

It\'s working like a charm in CMake 2.8 but, after the upgrade, it\'s failing.

I\'m trying to build thi

Answer 1

Looks like with Cmake 3.2.1 it works as expected.

Here's my sample project/CMakeLists.txt:

PROJECT(TestDownload)

SET(CMAKE_CXX_COMPILER "/path/to/bin/g++")
SET(CMAKE_C_COMPILER "/path/to/bin/gcc")

SET(CMAKE_CXX_FLAGS "")
SET(CMAKE_C_FLAGS "")

cmake_minimum_required(VERSION 3.2)
include(ExternalProject)

ExternalProject_Add(
  luacov
  URL https://github.com/keplerproject/luacov/archive/v0.7.tar.gz
  DOWNLOAD_DIR ${CMAKE_CURRENT_BINARY_DIR}/luacov
  UPDATE_COMMAND ""
  PATCH_COMMAND ""
  INSTALL_COMMAND ""
)

And the commands:

$ cd project
$ mkdir build && cd build
$ cmake ..
...
$ make all
Scanning dependencies of target luacov
[ 12%] Creating directories for 'luacov'
[ 25%] Performing download step (download, verify and extract) for 'luacov'
-- downloading...
     src='https://github.com/keplerproject/luacov/archive/v0.7.tar.gz'
     dst='/tmp/project/build/luacov/v0.7.tar.gz'
     timeout='none'
-- [download 7% complete]
-- [download 21% complete]
-- [download 76% complete]
-- [download 100% complete]
-- downloading... done
-- verifying file...
     file='/tmp/project/build/luacov/v0.7.tar.gz'
-- verifying file... warning: did not verify file - no URL_HASH specified?
-- extracting...
     src='/tmp/project/build/luacov/v0.7.tar.gz'
     dst='/tmp/project/build/luacov-prefix/src/luacov'
-- extracting... [tar xfz]
-- extracting... [analysis]
-- extracting... [rename]
-- extracting... [clean up]
-- extracting... done
[ 37%] No patch step for 'luacov'
[ 50%] No update step for 'luacov'
...