Apply patch to fix builds on boost 1.61+

https://bugzilla.redhat.com/show_bug.cgi?id=1423835

ledger-3.1.1-fix-boost-1.61.patch

@@ -0,0 +1,22 @@
+From 1856b8c4902498843f4da37a7aaeb2ce85acc1d3 Mon Sep 17 00:00:00 2001
+From: Denis <dkasak@users.noreply.github.com>
+Date: Mon, 12 Sep 2016 12:49:40 +0200
+Subject: [PATCH] Fix compilation error with boost 1.61
+
+---
+ src/item.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/item.h b/src/item.h
+index ca16d87b3..4dc6df7e6 100644
+--- a/src/item.h
++++ b/src/item.h
+@@ -92,7 +92,7 @@ class item_t : public supports_flags<uint_least16_t>, public scope_t
+ 
+   typedef std::pair<optional<value_t>, bool> tag_data_t;
+   typedef std::map<string, tag_data_t,
+-                   function<bool(string, string)> > string_map;
++                   std::function<bool(string, string)> > string_map;
+ 
+   state_t              _state;
+   optional<date_t>     _date;

ledger.spec

@@ -2,12 +2,15 @@
 
 Name:             ledger
 Version:          3.1.1
-Release:          7%{?dist}
+Release:          8%{?dist}
 Summary:          A powerful command-line double-entry accounting system
 License:          BSD
 URL:              http://ledger-cli.org/
 Source0:          https://github.com/ledger/ledger/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz
 
+# https://github.com/ledger/ledger/pull/465
+Patch0:           ledger-3.1.1-fix-boost-1.61.patch
+
 BuildRequires:    boost-devel
 BuildRequires:    cmake
 BuildRequires:    emacs(bin)
@@ -71,6 +74,7 @@ emacs-%{name} instead.
 
 %prep
 %setup -qn %{name}-%{version}
+%patch0 -p1
 # Avoid texinfo errors on EL7.
 %if 0%{?rhel} == 7
 sed -i -e 's#FIXME:UNDOCUMENTED#FIXMEUNDOCUMENTED#g' doc/ledger3.texi
@@ -191,6 +195,9 @@ fi
 
 
 %changelog
+* Wed Jul 26 2017 Iliana Weller <ilianaw@buttslol.net> - 3.1.1-8
+- Apply patch to fix builds on boost 1.61+ (#1423835)
+
 * Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 3.1.1-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild