japanese/zinnia: fix build with clang 16

Since clang 16 (and gcc 11) the default C++ standard is now gnu++17.
Because japanese/zinnia's build infrastructure does not explicitly set
its C++ standard, this leads to an error:

  svm.cpp:50:10: error: no member named 'random_shuffle' in namespace 'std'
      std::random_shuffle(index.begin(), index.begin() + active_size);
      ~~~~~^

This is because std::random_shuffle has been removed from C++17. An
suitable replacement is std::shuffle, using a std::random_device in
combination with std::mt19937 as the random number engine.

PR:		271953
Approved by:	fernape
MFH:		2023Q2

2 files changed, 25 insertions, 1 deletions

diff --git a/japanese/zinnia/Makefile b/japanese/zinnia/Makefile
index 6eb5bcfa93e3..99b677574cde 100644
--- a/japanese/zinnia/Makefile
+++ b/japanese/zinnia/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	zinnia
 PORTVERSION=	0.06
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	japanese
 MASTER_SITES=	SF
 
diff --git a/japanese/zinnia/files/patch-svm.cpp b/japanese/zinnia/files/patch-svm.cpp
new file mode 100644
index 000000000000..d37a3003bab6
--- /dev/null
+++ b/japanese/zinnia/files/patch-svm.cpp
@@ -0,0 +1,24 @@
+--- svm.cpp.orig	2009-04-05 11:40:29 UTC
++++ svm.cpp
+@@ -10,6 +10,7 @@
+ #include <vector>
+ #include <cmath>
+ #include <algorithm>
++#include <random>
+ #include "feature.h"
+ 
+ namespace zinnia {
+@@ -44,10 +45,12 @@ bool svm_train(size_t l,
+   }
+ 
+   static const size_t kMaxIteration = 2000;
++  std::random_device device;
++  std::mt19937 engine(device());
+   for (size_t iter = 0; iter < kMaxIteration; ++iter) {
+     double PGmax_new = -kINF;
+     double PGmin_new = kINF;
+-    std::random_shuffle(index.begin(), index.begin() + active_size);
++    std::shuffle(index.begin(), index.begin() + active_size, engine);
+ 
+     for (size_t s = 0; s < active_size; ++s) {
+       const size_t i = index[s];