Upstream-status: Presented upstream.

From 80dcd31562827f4b6d085affe9d9f22164f7ed34 Mon Sep 17 00:00:00 2001
From: Janneke Nieuwenhuizen <janneke@gnu.org>
Date: Fri, 15 Nov 2024 16:18:29 +0100
Subject: [PATCH] build: Support the 64bit Hurd.

* configure.ac: When cross-compiling declare LZ_decompress_open before
using it in conftest.c.
---
 configure.ac | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 50dc5ac..4c56768 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,7 +32,10 @@ AC_DEFUN([GUILE_LIBLZ_FILE_NAME], [
     [if test "$cross_compiling" = yes; then
        # When cross-compiling, we cannot rely on 'ldd'.  Instead, look
        # the output of 'ld --verbose', assuming we're using GNU ld.
-       echo 'int main () { return LZ_decompress_open(); }' > conftest.c
+       cat > conftest.c <<EOF
+int LZ_decompress_open ();
+int main () { return LZ_decompress_open(); }
+EOF
        guile_cv_liblz_libdir="\
           `$CC conftest.c -o conftest$EXEEXT -llz -Wl,--verbose 2>/dev/null \
           | grep -E '^/.*/liblz\.(a|so)'`"
-- 
2.46.0