Hi, Here's a patch to recognize Android environments.
Such environments are "apps" with POSIX-like tools. Today, the most frequently used one is Termux [1][2][3]; on devices with Android versions before 5.0 one can use Terminal-IDE [4][5]. config.sub already supports this environment: $ sh config.sub armv7l-linux-androideabi armv7l-unknown-linux-androideabi I've built many GNU packages in this environment, with the following recipe: CONFIG_SHELL=$PREFIX/bin/sh; export CONFIG_SHELL CC="clang -ferror-limit=0" CXX="clang++ -ferror-limit=0"; export CC CXX ./configure --host=armv7l-linux-androideabi --prefix=$HOME/local The Termux people have compiled or ported more than 1000 packages as well [6]. But the requirement to pass the --host parameter each time is an annoyance. Without it, based only on the results of uname, config.guess guesses $ sh config.guess armv7l-unknown-linux-gnueabi and many configuration results are wrong (because Android has many functions in libc without declaring them in the .h files, depending on the so-called "Android API level"), leading to many compilation errors. With the attached patch, it produces $ sh config.guess armv7l-unknown-linux-androideabi The patch does not include an addition to the config.guess test suite, since the uname values are: $ uname -m armv7l $ uname -r 4.19.127 $ uname -s Linux $ uname -v #1 SMP PREEMPT Tue Apr 4 16:54:58 IST 2023 $ uname -p unknown which maps to armv7l-unknown-linux-gnueabi. Bruno [1] https://github.com/termux/termux-app [2] https://f-droid.org/en/packages/com.termux/ [3] https://wiki.termux.com/wiki/Main_Page [4] https://en.wikibooks.org/wiki/Android/Terminal_IDE [5] http://www.spartacusrex.com/terminalide.htm [6] https://github.com/termux/termux-packages/tree/master/packages
>From 181c3864dd78bc0bd5c12b5a63c8eaf5261b6282 Mon Sep 17 00:00:00 2001 From: Bruno Haible <br...@clisp.org> Date: Thu, 17 Aug 2023 11:26:25 +0200 Subject: [PATCH] config.guess: Detect Android (as opposed to GNU/Linux). --- config.guess | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/config.guess b/config.guess index b187213..98281c1 100755 --- a/config.guess +++ b/config.guess @@ -155,6 +155,9 @@ Linux|GNU|GNU/*) set_cc_for_build cat <<-EOF > "$dummy.c" + #if defined(__ANDROID__) + LIBC=android + #else #include <features.h> #if defined(__UCLIBC__) LIBC=uclibc @@ -169,6 +172,7 @@ Linux|GNU|GNU/*) LIBC=musl #endif #endif + #endif EOF cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'` eval "$cc_set_libc" -- 2.34.1
