From ea70672db7f894d256dada5370539fa616bbb7c0 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Sat, 26 Nov 2022 09:20:37 +0000
Subject: [PATCH] Fix gcc -fno-exception build.

---
 include/boost/math/special_functions/detail/ibeta_inverse.hpp | 4 ++++
 include/boost/math/tools/roots.hpp                            | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/include/boost/math/special_functions/detail/ibeta_inverse.hpp b/include/boost/math/special_functions/detail/ibeta_inverse.hpp
index 90a94e644..9b7bb50b8 100644
--- a/include/boost/math/special_functions/detail/ibeta_inverse.hpp
+++ b/include/boost/math/special_functions/detail/ibeta_inverse.hpp
@@ -633,14 +633,18 @@ T ibeta_inv_imp(T a, T b, T p, T q, const Policy& pol, T* py)
             T bet = 0;
             if (b < 2)
             {
+#ifndef BOOST_NO_EXCEPTIONS
                try
+#endif
                {
                   bet = boost::math::beta(a, b, pol);
                }
+#ifndef BOOST_NO_EXCEPTIONS
                catch (const std::overflow_error&)
                {
                   bet = tools::max_value<T>();
                }
+#endif
             }
             if(bet != 0)
             {
diff --git a/include/boost/math/tools/roots.hpp b/include/boost/math/tools/roots.hpp
index ccf908f21..6493e8122 100644
--- a/include/boost/math/tools/roots.hpp
+++ b/include/boost/math/tools/roots.hpp
@@ -543,15 +543,19 @@ namespace detail {
          last_f0 = f0;
          delta2 = delta1;
          delta1 = delta;
+#ifndef BOOST_NO_EXCEPTIONS
          try
+#endif
          {
             detail::unpack_tuple(f(result), f0, f1, f2);
          }
+#ifndef BOOST_NO_EXCEPTIONS
          catch (const std::overflow_error&)
          {
             f0 = max > 0 ? tools::max_value<T>() : -tools::min_value<T>();
             f1 = f2 = 0;
          }
+#endif
          --count;
 
          BOOST_MATH_INSTRUMENT_VARIABLE(f0);