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From 843bd68ea83ba011d593ad7162d1df89c230004b Mon Sep 17 00:00:00 2001
From: Mitch Tishmack <mitch.tishmack@gmail.com>
Date: Sat, 15 Oct 2016 21:53:13 -0500
Subject: [PATCH 1/1] Correct issue with libffi and glibc

Ref: https://github.com/mitchty/alpine-linux-ghc-bootstrap/issues/16

Shamelessly learnt from here
https://github.com/nilcons/ghc-musl/blob/master/ghc-musl/Dockerfile#L24
---
 libffi/ghc.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libffi/ghc.mk b/libffi/ghc.mk
index 404cce9..2034873 100644
--- a/libffi/ghc.mk
+++ b/libffi/ghc.mk
@@ -61,6 +61,7 @@ $(libffi_STAMP_CONFIGURE): $(TOUCH_DEP)
 # We have to fake a non-working ln for configure, so that the fallback
 # option (cp -p) gets used instead.  Otherwise the libffi build system
 # will use cygwin symbolic links which cannot be read by mingw gcc.
+	sed -i s/__gnu_linux__/1/ libffi/build/src/closures.c
 	chmod +x libffi/ln
 
 	# We need to use -MMD rather than -MD, as otherwise we get paths
-- 
2.9.0