Termux build fail

[polyzium]

Discordrb fails to build on Termux:

@localhost ~ % gem install discordrb
Building native extensions.  This could take a while...
ERROR:  Error installing discordrb:
        ERROR: Failed to build gem native extension.

    current directory: /data/data/com.termux/files/usr/lib/ruby/gems/2.4.0/gems/ffi-1.9.18/ext/ffi_c
/data/data/com.termux/files/usr/bin/ruby -r ./siteconf20170319-1465-tybola.rb extconf.rb
checking for ffi.h... no
checking for ffi.h in /usr/local/include,/usr/include/ffi... no
checking for shlwapi.h... no
checking for rb_thread_blocking_region()... no
checking for rb_thread_call_with_gvl()... yes
checking for rb_thread_call_without_gvl()... yes
checking for ffi_prep_cif_var()... no
creating extconf.h
creating Makefile

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /data/data/com.termux/files/usr/lib/ruby/gems/2.4.0/extensions/aarch64-linux/2.4.0/ffi-1.9.18/mkmf.log

current directory: /data/data/com.termux/files/usr/lib/ruby/gems/2.4.0/gems/ffi-1.9.18/ext/ffi_c
make "DESTDIR=" clean

current directory: /data/data/com.termux/files/usr/lib/ruby/gems/2.4.0/gems/ffi-1.9.18/ext/ffi_c
make "DESTDIR="
Configuring libffi
/data/data/com.termux/files/usr/bin/sh: 4: /usr/bin/env: not found
make: *** [libffi.mk:7: "/data/data/com.termux/files/usr/lib/ruby/gems/2.4.0/gems/ffi-1.9.18/ext/ffi_c/libffi-aarch64-linux-android"/.libs/libffi_convenience.a] Error 127

make failed, exit code 2

Gem files will remain installed in /data/data/com.termux/files/usr/lib/ruby/gems/2.4.0/gems/ffi-1.9.18 for inspection.
Results logged to /data/data/com.termux/files/usr/lib/ruby/gems/2.4.0/extensions/aarch64-linux/2.4.0/ffi-1.9.18/gem_make.out
gem install discordrb  8.27s user 1.92s system 78% cpu 13.052 total

Unfortunately i don't know where to modify the Makefile. Even with coreutils it fails.

[meew0]

This seems like a problem with building FFI. You might want to check at https://github.com/ffi/ffi

[greenbigfrog]

Should work again when ffi/ffi#528 gets merged