bug#23055: wget within guix fails to resolve FQDNs when used as an input (native or otherwise)

[Dennis Mungai]

Hello there,

I'm porting Arrayfire to GNU Guix, see https://github.com/Brainiarc7/guix-bioinformatics/blob/master/gn/packages/arrayfire.scm

One of the inputs declared is wget, needed as a fall-back when fetching BoostCompute should the Cmake checksums fail.

See the build log below:

-- Boost version: 1.60.0
-- BoostCompute...
--   getting https://github.com/boostorg/compute/archive/v0.5.tar.gz
--   validating /tmp/nix-build-arrayfire-3.3.1.drv-0/build/third_party/compute-0.5.tar.gz
CMake Warning at CMakeModules/build_boost_compute.cmake:47 (MESSAGE):
  /tmp/nix-build-arrayfire-3.3.1.drv-0/build/third_party/compute-0.5.tar.gz:
  Invalid check sum d41d8cd98f00b204e9800998ecf8427e.  Expected was
  69a52598ac539d3b7f6005a3dd2b6f58
Call Stack (most recent call first):
  src/backend/opencl/CMakeLists.txt:91 (INCLUDE)


-- Trying wget https://github.com/boostorg/compute/archive/v0.5.tar.gz
--2016-03-18 17:38:55--  https://github.com/boostorg/compute/archive/v0.5.tar.gz
Resolving github.com (github.com)... failed: Name or service not known.
wget: unable to resolve host address ‘github.com’
CMake Error at CMakeModules/build_boost_compute.cmake:53 (MESSAGE):
  /tmp/nix-build-arrayfire-3.3.1.drv-0/build/third_party/compute-0.5.tar.gz:
  Invalid check sum d41d8cd98f00b204e9800998ecf8427e.  Expected was
  69a52598ac539d3b7f6005a3dd2b6f58
Call Stack (most recent call first):
  src/backend/opencl/CMakeLists.txt:91 (INCLUDE)


-- Configuring incomplete, errors occurred!
See also "/tmp/nix-build-arrayfire-3.3.1.drv-0/build/CMakeFiles/CMakeOutput.log".
phase `configure' failed after 2.8 seconds
builder for `/gnu/store/4ik93fkxrjy6acihzz5mzjcjkwc5va38-arrayfire-3.3.1.drv' failed with exit code 1
@ build-failed /gnu/store/4ik93fkxrjy6acihzz5mzjcjkwc5va38-arrayfire-3.3.1.drv - 1 builder for `/gnu/store/4ik93fkxrjy6acihzz5mzjcjkwc5va38-arrayfire-3.3.1.drv' failed with exit code 1
guix build: error: build failed: build of `/gnu/store/4ik93fkxrjy6acihzz5mzjcjkwc5va38-arrayfire-3.3.1.drv' failed

As you can see in the first part, fetching BoostCompute fails because the specified MD5 hash fails, and as a result, the build system falls back to fetching the same with wget (see second snippet).

The second part fails because wget fails to resolve the FQDN entry github.com.

However, when invoking wget directly, both the local instalation and the Guix installation, the FQDN can be resolved correctly and the associated file fetched successfully:

/gnu/store/w50mfvfzyjzpcbyw3lll7hm4j457jhb0-wget-1.17.1/bin/wget https://github.com/boostorg/compute/archive/v0.5.tar.gz

Would this qualify as a bug filed against wget in Guix, or does the problem lie elsewhere?

Regards,

Dennis.