gnu: perl-xml-libxslt: Fix configure script.

* gnu/packages/patches/perl-xml-libxslt-fix-configure.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register patch.
* gnu/packages/xml.scm (perl-xml-libxslt)[origin]: Apply patch.

Change-Id: I9199c6e4de924c7425ccb06c3d7da12d9093b8a4

gnu/local.mk

@@ -2107,6 +2107,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/perl-www-curl-fix-struct-void.patch	\
   %D%/packages/patches/perl-www-curl-remove-symbol.patch	\
   %D%/packages/patches/perl-xml-libxml-fix-function-prototypes.patch	\
+  %D%/packages/patches/perl-xml-libxslt-fix-configure.patch	\
   %D%/packages/patches/phoronix-test-suite-fsdg.patch		\
   %D%/packages/patches/picprog-non-intel-support.patch		\
   %D%/packages/patches/pidgin-add-search-path.patch		\

gnu/packages/patches/perl-xml-libxslt-fix-configure.patch

@@ -0,0 +1,34 @@
+Patch from https://github.com/shlomif/perl-XML-LibXSLT/commit/40fdc7f0.patch
+
+From 40fdc7f0443949d9556f0ecf15eb7777d543cee1 Mon Sep 17 00:00:00 2001
+From: Florian Weimer <fweimer@redhat.com>
+Date: Thu, 9 Feb 2023 19:28:14 +0100
+Subject: [PATCH] Avoid C implicit function declaration in Makefile.PL (C99
+ compat)
+
+Future compilers are likely not to support implicit function
+declarations.  Add a fake prototype so that the probes will
+not always fail with such compilers.
+---
+ Makefile.PL | 7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/Makefile.PL b/Makefile.PL
+index 079f8ea..d720b48 100644
+--- a/Makefile.PL
++++ b/Makefile.PL
+@@ -463,10 +463,11 @@ SRC
+             }
+         }
+         else {
+-
++	    # Use a fake prototype in the style of autoconf.
+             $result = try_link(<<"SRC", $libs);
+-blank() { return 0; }
+-int t() { ${func}(); return 0; }
++char blank(void) { return 0; }
++char ${func}(void);
++int t(void) { ${func}(); return 0; }
+ SRC
+         }
+     }

gnu/packages/xml.scm

@@ -703,7 +703,9 @@ XML parser and the high performance DOM implementation.")
                            "XML-LibXSLT-" version ".tar.gz"))
        (sha256
         (base32
-         "0wyl8klgr65j8y8fzgwz9jlvfjwvxazna8j3dg9gksd2v973fpia"))))
+         "0wyl8klgr65j8y8fzgwz9jlvfjwvxazna8j3dg9gksd2v973fpia"))
+       ;; Remove patch with update to version 2.003000.
+       (patches (search-patches "perl-xml-libxslt-fix-configure.patch"))))
     (build-system perl-build-system)
     (inputs
      (list libxslt))