From e9da224bce287653f96235bd6ae02da6f8f8b219 Mon Sep 17 00:00:00 2001
From: Niklas Hambüchen <mail@nh2.me>
Date: Fri, 17 May 2019 02:50:03 +0200
Subject: Allow disabling random_r() usage manually. See #279.

This allows building hmatrix against the musl libc,
which allows easily linking Haskell programs statically.

A feature-detection for random_r() would be even better,
but this will do for now.
---
 packages/base/hmatrix.cabal | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'packages/base/hmatrix.cabal')

diff --git a/packages/base/hmatrix.cabal b/packages/base/hmatrix.cabal
index 1380a36..c371ae7 100644
--- a/packages/base/hmatrix.cabal
+++ b/packages/base/hmatrix.cabal
@@ -36,6 +36,11 @@ flag disable-default-paths
     default:        False
     manual: True
 
+flag no-random_r
+    description:    When enabled, don't depend on the random_r() C function.
+    default:        False
+    manual: True
+
 library
 
     Build-Depends:      base >= 4.8 && < 5,
@@ -99,6 +104,9 @@ library
         cc-options:     -msse2
 
 
+    if flag(no-random_r)
+        cc-options: -DNO_RANDOM_R
+
     if os(OSX)
         if flag(openblas)
             if !flag(disable-default-paths)
-- 
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