-- Add PlaneConstraint.o to testSampleReader and testEnergyFunctional link lists.
-- PlaneConstraint was added in 1.79.0 but its object file was omitted from the
-- link lines of these test targets, causing undefined vtable errors.
-- See https://github.com/qboxcode/qbox-public/issues/13 (reported)

--- Makefile.orig	2026-09-06 07:29:39 UTC
+++ Makefile
@@ -112,6 +112,7 @@ -include $(DEPS)
         sinft.o spline.o UnitCell.o \
         Base64Transcoder.o Constraint.o ConstraintSet.o DistanceConstraint.o \
         AngleConstraint.o TorsionConstraint.o PositionConstraint.o \
+        PlaneConstraint.o \
         ExtForceSet.o ExtForce.o PairExtForce.o AtomicExtForce.o \
         GlobalExtForce.o sampling.o \
         SampleReader.o StructuredDocumentHandler.o \
@@ -136,6 +137,7 @@ -include $(DEPS)
         GlobalExtForce.o \
         ConstraintSet.o Constraint.o DistanceConstraint.o \
         AngleConstraint.o TorsionConstraint.o PositionConstraint.o \
+        PlaneConstraint.o \
         NonLocalPotential.o sampling.o Base64Transcoder.o \
         ChargeDensity.o sinft.o spline.o \
         XCOperator.o ExchangeOperator.o Bisection.o \