From 82bf05d215dfcc2ef779395bf79b5fc23d5b9555 Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Wed, 10 Feb 2021 18:36:04 +0100
Subject: [PATCH 1/4] bpo-43112: detect musl as a separate SOABI

musl libc and gnu libc are not ABI compatible so we need set different
SOABI for musl and not simply assume that all linux is linux-gnu.

Replace linux-gnu with the detected os for the build from config.guess
for linux-musl*.
---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Lib/test/test_sysconfig.py b/Lib/test/test_sysconfig.py
index 0ca5c93..ddde153 100644
--- a/Lib/test/test_sysconfig.py
+++ b/Lib/test/test_sysconfig.py
@@ -378,10 +378,13 @@ class TestSysConfig(unittest.TestCase):
         if re.match('(i[3-6]86|x86_64)$', machine):
             if ctypes.sizeof(ctypes.c_char_p()) == 4:
                 self.assertTrue(suffix.endswith('i386-linux-gnu.so') or
-                                suffix.endswith('x86_64-linux-gnux32.so'),
+                                suffix.endswith('x86_64-linux-gnux32.so') or
+                                suffix.endswith('i386-linux-musl.so'),
                                 suffix)
             else: # 8 byte pointer size
-                self.assertTrue(suffix.endswith('x86_64-linux-gnu.so'), suffix)
+                self.assertTrue(suffix.endswith('x86_64-linux-gnu.so') or
+                                suffix.endswith('x86_64-linux-musl.so'),
+                                suffix)
 
     @unittest.skipUnless(sys.platform == 'darwin', 'OS X-specific test')
     def test_osx_ext_suffix(self):
diff --git a/configure b/configure
index b7be60e..d9801f4 100755
--- a/configure
+++ b/configure
@@ -5358,6 +5358,11 @@ EOF
 
 if $CPP $CPPFLAGS conftest.c >conftest.out 2>/dev/null; then
   PLATFORM_TRIPLET=`grep -v '^#' conftest.out | grep -v '^ *$' | tr -d ' 	'`
+  case "$build_os" in
+  linux-musl*)
+    PLATFORM_TRIPLET=`echo "$PLATFORM_TRIPLET" | sed 's/linux-gnu/linux-musl/'`
+    ;;
+  esac
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PLATFORM_TRIPLET" >&5
 $as_echo "$PLATFORM_TRIPLET" >&6; }
 else
diff --git a/configure.ac b/configure.ac
index 6a1b066..d732257 100644
--- a/configure.ac
+++ b/configure.ac
@@ -876,6 +876,11 @@ EOF
 
 if $CPP $CPPFLAGS conftest.c >conftest.out 2>/dev/null; then
   PLATFORM_TRIPLET=`grep -v '^#' conftest.out | grep -v '^ *$' | tr -d ' 	'`
+  case "$build_os" in
+  linux-musl*)
+    PLATFORM_TRIPLET=`echo "$PLATFORM_TRIPLET" | sed 's/linux-gnu/linux-musl/'`
+    ;;
+  esac
   AC_MSG_RESULT([$PLATFORM_TRIPLET])
 else
   AC_MSG_RESULT([none])