From 1df9245586939e5a359f8c486662642d9d5998b5 Mon Sep 17 00:00:00 2001
From: Marius Bakke <mbakke@fastmail.com>
Date: Fri, 18 Oct 2019 14:18:21 +0200
Subject: [PATCH] gnu: encfs: Fix build failure with GCC 7.

Fixes <https://bugs.gnu.org/37779>.
Reported by Pierre Neidhardt <mail@ambrevar.xyz>.

* gnu/packages/crypto.scm (encfs)[arguments]: Add phase 'patch-CMakeLists.txt'.
---
 gnu/packages/crypto.scm | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gnu/packages/crypto.scm b/gnu/packages/crypto.scm
index e8cf8157d5..a8f60f1665 100644
--- a/gnu/packages/crypto.scm
+++ b/gnu/packages/crypto.scm
@@ -211,6 +211,15 @@ OpenBSD tool of the same name.")
              (copy-recursively (assoc-ref inputs "googletest-source")
                                "vendor/github.com/google/googletest")
              #t))
+         (add-before 'configure 'patch-CMakeLists.txt
+           (lambda _
+             ;; Prevent CMake from adding libc on the system include path.
+             ;; Otherwise it will interfere with the libc used by GCC and
+             ;; ultimately cause #include_next errors.
+             (substitute* "CMakeLists.txt"
+               (("include_directories \\(SYSTEM \\$\\{Intl_INCLUDE_DIRS\\}\\)")
+                ""))
+             #t))
          (add-before 'check 'make-unittests
            (lambda _
              (invoke "make" "unittests"))))))