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-rw-r--r--gnu/packages/patches/minisat-friend-declaration.patch25
1 files changed, 25 insertions, 0 deletions
diff --git a/gnu/packages/patches/minisat-friend-declaration.patch b/gnu/packages/patches/minisat-friend-declaration.patch
new file mode 100644
index 0000000000..14a886ae2f
--- /dev/null
+++ b/gnu/packages/patches/minisat-friend-declaration.patch
@@ -0,0 +1,25 @@
+See https://groups.google.com/forum/#!topic/minisat/FCocZsC8oMQ
+This seems to only be a problem with newer versions of g++, and
+upstream development seems to have stopped in 2013.
+
+diff -rupN minisat-2.2.0/core/SolverTypes.h minisat-2.2.0.patched/core/SolverTypes.h
+--- a/minisat/core/SolverTypes.h 2010-07-10 17:07:36.000000000 +0100
++++ b/minisat/core/SolverTypes.h 2014-03-29 11:57:49.000000000 +0000
+@@ -47,7 +47,7 @@ struct Lit {
+ int x;
+
+ // Use this as a constructor:
+- friend Lit mkLit(Var var, bool sign = false);
++ //friend Lit mkLit(Var var, bool sign = false);
+
+ bool operator == (Lit p) const { return x == p.x; }
+ bool operator != (Lit p) const { return x != p.x; }
+@@ -55,7 +55,7 @@ struct Lit {
+ };
+
+
+-inline Lit mkLit (Var var, bool sign) { Lit p; p.x = var + var + (int)sign; return p; }
++inline Lit mkLit (Var var, bool sign = false) { Lit p; p.x = var + var + (int)sign; return p; }
+ inline Lit operator ~(Lit p) { Lit q; q.x = p.x ^ 1; return q; }
+ inline Lit operator ^(Lit p, bool b) { Lit q; q.x = p.x ^ (unsigned int)b; return q; }
+ inline bool sign (Lit p) { return p.x & 1; }