From 79e0233c0b1635b9bf00f273ecce26dd900b2056 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 14 Mar 2026 22:46:59 +0000
Subject: [PATCH 1/2] Initial plan


From 9c0d024e6f38aba68da09c8c9a551c7fead715b3 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Sat, 14 Mar 2026 22:49:17 +0000
Subject: [PATCH 2/2] Fix clang build: change constexpr to const for pi =
 std::acos(-1.0)

Co-authored-by: The9Cat <25960766+The9Cat@users.noreply.github.com>
---
 utils/Test/testDeproject.cc | 2 +-
 utils/Test/testEmpDeproj.cc | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/utils/Test/testDeproject.cc b/utils/Test/testDeproject.cc
index c9ae00e40..8675b9643 100644
--- a/utils/Test/testDeproject.cc
+++ b/utils/Test/testDeproject.cc
@@ -8,7 +8,7 @@
 #include "cxxopts.H"
 
 namespace {
-  constexpr double pi = std::acos(-1.0);
+  const double pi = std::acos(-1.0);
 }
 
 using namespace Deproject;
diff --git a/utils/Test/testEmpDeproj.cc b/utils/Test/testEmpDeproj.cc
index 1ae2b0158..a502331ba 100644
--- a/utils/Test/testEmpDeproj.cc
+++ b/utils/Test/testEmpDeproj.cc
@@ -25,7 +25,7 @@ int main(int argc, char* argv[])
   int Nr, Ngrid, NumR, Nint;
 
   // Define pi in a portable way instead of relying on non-standard M_PI
-  constexpr double pi = std::acos(-1.0);
+  const double pi = std::acos(-1.0);
 
   // Parse command-line options
   //