nixpkgs/pkgs/development/perl-modules/xml-parser-0001-HACK-Assumes-Expat-paths-are-good.patch

From e996904128653c67b04ddbdb1e10cef158098957 Mon Sep 17 00:00:00 2001
From: Samuel Dionne-Riel <samuel@dionne-riel.com>
Date: Fri, 6 Dec 2019 23:00:51 -0500
Subject: [PATCH] [HACK]: Assumes Expat paths are good.

The `check_lib` check fails with the cross-compilation build platform's
Perl, since apparently `mktemp` is missing...

Even then, side-stepping the issue, it seems it is not actually enough
to work, as the compilation fails.
---
 Makefile.PL | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/Makefile.PL b/Makefile.PL
index 505d1df..fc38b76 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -29,12 +29,17 @@ foreach (@ARGV) {
 @ARGV = @replacement_args;
 
 unless (
-    check_lib(    # fill in what you prompted the user for here
-        lib     => [qw(expat)],
-        header  => ['expat.h'],
-        incpath => $expat_incpath,
-        ( $expat_libpath ? ( libpath => $expat_libpath ) : () ),
-    )
+    #check_lib(    # fill in what you prompted the user for here
+    #    lib     => [qw(expat)],
+    #    header  => ['expat.h'],
+    #    incpath => $expat_incpath,
+    #    ( $expat_libpath ? ( libpath => $expat_libpath ) : () ),
+    #)
+    # The check_lib implementation fails horribly with cross-compilation.
+    # We are giving known good paths to expat.
+    # And in all cases, the previous behaviour of not actually failing
+    # seemed to work just fine :/.
+    false
 ) {
     warn <<'Expat_Not_Installed;';
 
-- 
2.23.0