[bug#28667] [PATCH] gnu: cflow: Fix preprocess option.

[Oleg Pykhalov <go.wigust@gmail.com>]

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From c2a8265ecb4e52b4447f75112dace21ed5ccc12a Mon Sep 17 00:00:00 2001
From: Oleg Pykhalov <go.wigust@gmail.com>
Date: Mon, 2 Oct 2017 07:38:09 +0300
Subject: [PATCH] gnu: cflow: Fix preprocess option.

* gnu/packages/code.scm (cflow): Fix preprocess option.
---
 gnu/packages/code.scm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/code.scm b/gnu/packages/code.scm
index 6e04739f6..819c3e8d4 100644
--- a/gnu/packages/code.scm
+++ b/gnu/packages/code.scm
@@ -58,7 +58,12 @@
 
     ;; Needed to have cflow-mode.el installed.
     (native-inputs `(("emacs" ,emacs-minimal)))
-
+    (propagated-inputs `(("gcc" ,gcc-7)))
+    (arguments
+     '(#:configure-flags (list (string-append "CPPFLAGS="
+                                              "-D" "CFLOW_PREPROC=\\\""
+                                              (assoc-ref %build-inputs "gcc")
+                                              "/bin/cpp\\\""))))
     (home-page "https://www.gnu.org/software/cflow/")
     (synopsis "Create a graph of control flow within a program")
     (description
-- 
2.14.2