# Install the packages necessary to build Guile
pkg install clang git make libtool gettext flex android-support libgmp-dev libgc-dev readline-dev autoconf automake
# There may be more that I'm currently forgetting... sorry
# Reset directory to known base
cd ~
# Pull Guile repo
git clone git://git.sv.gnu.org/guile.git
# If the git protocol is unavailable, use http: git clone http://git.sv.gnu.org/r/guile.git
cd guile
# Use the latest stable branch, stable-2.2
git fetch origin stable-2.2
git checkout stable-2.2
# Apply the patch from here: https://lists.gnu.org/archive/html/bug-gnulib/2018-05/msg00119.html
# I have it saved as 'fix-langinfo.patch' locally
# NOTE: This is in upstream gnulib; the Guile folks need to update their in-tree copy
git apply fix-langinfo.patch
# Remove the 'backup' definition of `nl_langinfo` in gnulib.
# Guile tries to auto-detect it, but doesn't realize that it is
# provided by libandroid-support and fails to find it.
# It thus tries to define its own, which causes the compiler
# to balk about redefinition. The correct way to do this would
# be to fix the feature detection parts, but in the interest
# of ease, just directly disable it by preprocessor-conditioning it out.
sed -ibak "s/#else/#endif\n#if 0\n/" lib/nl_langinfo.c
# Run configure. Explicitly specific external libraries that must be used, as well as CC.
# Ensure that Guile is compiled with the Android-required PIC option
CC='clang' LIBS='-latomic -landroid-support' ./configure --with-pic
# Build Guile. The error is likely to occur. At this point, you can get away with running
# `make` again and again and eventually it'll entirely succeed.
# Be warned that some key files in the bootstrap process take a little while to build.
# Optinally, specify a -jX argument (X being number of concurrent processes) to speed
# up compilation, and maybe -k if you want to try and get the build to complete
# (this makes it complete as much as it can, even if there's an error)
make
# If you've gotten make to finish, then run the test suite. I've not gotten it even halfway through the
# tests without the error, and it's unlikely you'll have enough luck to do so. It will probably fail every time.
./check-guile

$ termux-info
Updatable packages:
All packages up to date
System information:
Linux localhost 3.18.14-8761055 #1 SMP PREEMPT Wed Jul 20 08:48:18 KST 2016 armv8l Android
Termux-packages arch:
arm
Android version:
6.0.1
Device manufacturer:
samsung
Device model:
SM-T580
$