fails to build from source

[joeyh]

Fails to build on Debian unstable. There are different build failures depending on whether or not. I have the debian package libargon2-0-dev installed

joey@darkstar:~/tmp>cabal install argon2
Resolving dependencies...
Configuring argon2-1.1.0...
Building argon2-1.1.0...
Preprocessing library argon2-1.1.0...
[1 of 2] Compiling Crypto.Argon2.FFI ( dist/build/Crypto/Argon2/FFI.hs, dist/build/Crypto/Argon2/FFI.o )
[2 of 2] Compiling Crypto.Argon2    ( src/Crypto/Argon2.hs, dist/build/Crypto/Argon2.o )

phc-winner-argon2/src/argon2.c:19:22:
     fatal error: encoding.h: No such file or directory
compilation terminated.
Failed to install argon2-1.1.0
cabal: Error: some packages failed to install:
argon2-1.1.0 failed during the building phase. The exception was:
ExitFailure 1
- exit 1
joey@darkstar:~/tmp>sudo apt-get remove libargon2-0
libargon2-0      libargon2-0-dev  
joey@darkstar:~/tmp>sudo apt-get remove libargon2-0-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gstreamer0.10-alsa gstreamer0.10-plugins-bad libapache2-mod-dnssd
  libargon2-0 libc6-i686:i386 libcdaudio1 libgnome-bluetooth13
  libgstreamer-plugins-bad0.10-0 libkeybinder0 libqtwebkit4 libslv2-9
  libstd-rust-1.8 linux-image-3.2.0-4-amd64 vlc-plugin-samba xfce4-volumed
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
  libargon2-0-dev
0 upgraded, 0 newly installed, 1 to remove and 408 not upgraded.
After this operation, 88.1 kB disk space will be freed.
Do you want to continue? [Y/n] 
(Reading database ... 305707 files and directories currently installed.)
Removing libargon2-0-dev:amd64 (0~20160406-2) ...
joey@darkstar:~/tmp>cabal install argon2
Resolving dependencies...
Configuring argon2-1.1.0...
Building argon2-1.1.0...
Preprocessing library argon2-1.1.0...
FFI.hsc:6:20: fatal error: argon2.h: No such file or directory
compilation terminated.
compiling dist/build/Crypto/Argon2/FFI_hsc_make.c failed (exit code 1)
command was: /usr/bin/gcc -c dist/build/Crypto/Argon2/FFI_hsc_make.c -o dist/build/Crypto/Argon2/FFI_hsc_make.o -fno-stack-protector -D__GLASGOW_HASKELL__=710 -Dlinux_BUILD_OS=1 -Dx86_64_BUILD_ARCH=1 -Dlinux_HOST_OS=1 -Dx86_64_HOST_ARCH=1 -Iphc-winner-argon2/src -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/lib/ghc/bytes_6VWy06pWzJq9evDvK2d4w6/include -I/usr/lib/ghc/base_HQfYBxpPvuw8OunzQu6JGM/include -I/usr/lib/ghc/integ_2aU3IZNMF9a7mQ0OzsZ0dS/include -I/usr/lib/ghc/include -I/usr/lib/ghc/include/
Failed to install argon2-1.1.0
cabal: Error: some packages failed to install:
argon2-1.1.0 failed during the building phase. The exception was:
ExitFailure 1

[joeyh]

My workaround was to use the debian package of the library, and in the cabal file replace the embedded C library lines with "extra-libraries: argon2"

It would be good to have a build flag to build using the system argon2 library even once this bug gets fixed.

[joeyh]

This build failure occurs when the source is unpacked by cabal. Cloning the source from github avoids the problem.

Apparently files in phc-winner-argon2 are left out of the hackage tarball. Including phc-winner-argon2/src/argon2.h