[wpimath] Explicitly export wpimath symbols

Co-authored-by: Tyler Veness <calcmogul@gmail.com>

wpimath/src/main/native/include/frc/controller/ArmFeedforward.h

@@ -5,6 +5,7 @@
 #pragma once
 
 #include <wpi/MathExtras.h>
+#include <wpi/SymbolExports.h>
 
 #include "units/angle.h"
 #include "units/angular_velocity.h"
@@ -16,7 +17,7 @@ namespace frc {
  * A helper class that computes feedforward outputs for a simple arm (modeled as
  * a motor acting against the force of gravity on a beam suspended at an angle).
  */
-class ArmFeedforward {
+class WPILIB_DLLEXPORT ArmFeedforward {
  public:
   using Angle = units::radians;
   using Velocity = units::radians_per_second;

wpimath/src/main/native/include/frc/controller/HolonomicDriveController.h

@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <wpi/SymbolExports.h>
+
 #include "frc/controller/PIDController.h"
 #include "frc/controller/ProfiledPIDController.h"
 #include "frc/geometry/Pose2d.h"
@@ -27,7 +29,7 @@ namespace frc {
  * translations, users can specify a custom heading that the drivetrain should
  * point toward. This heading reference is profiled for smoothness.
  */
-class HolonomicDriveController {
+class WPILIB_DLLEXPORT HolonomicDriveController {
  public:
   /**
    * Constructs a holonomic drive controller.

wpimath/src/main/native/include/frc/controller/LinearQuadraticRegulator.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <wpi/SymbolExports.h>
 #include <wpi/array.h>
 
 #include "Eigen/Cholesky"
@@ -321,7 +322,7 @@ class LinearQuadraticRegulator
 // Template specializations are used here to make common state-input pairs
 // compile faster.
 template <>
-class LinearQuadraticRegulator<1, 1>
+class WPILIB_DLLEXPORT LinearQuadraticRegulator<1, 1>
     : public detail::LinearQuadraticRegulatorImpl<1, 1> {
  public:
   template <int Outputs>
@@ -357,7 +358,7 @@ class LinearQuadraticRegulator<1, 1>
 // Template specializations are used here to make common state-input pairs
 // compile faster.
 template <>
-class LinearQuadraticRegulator<2, 1>
+class WPILIB_DLLEXPORT LinearQuadraticRegulator<2, 1>
     : public detail::LinearQuadraticRegulatorImpl<2, 1> {
  public:
   template <int Outputs>
@@ -393,7 +394,7 @@ class LinearQuadraticRegulator<2, 1>
 // Template specializations are used here to make common state-input pairs
 // compile faster.
 template <>
-class LinearQuadraticRegulator<2, 2>
+class WPILIB_DLLEXPORT LinearQuadraticRegulator<2, 2>
     : public detail::LinearQuadraticRegulatorImpl<2, 2> {
  public:
   template <int Outputs>

wpimath/src/main/native/include/frc/controller/PIDController.h

@@ -7,6 +7,7 @@
 #include <functional>
 #include <limits>
 
+#include <wpi/SymbolExports.h>
 #include <wpi/sendable/Sendable.h>
 #include <wpi/sendable/SendableHelper.h>
 
@@ -17,8 +18,9 @@ namespace frc2 {
 /**
  * Implements a PID control loop.
  */
-class PIDController : public wpi::Sendable,
-                      public wpi::SendableHelper<PIDController> {
+class WPILIB_DLLEXPORT PIDController
+    : public wpi::Sendable,
+      public wpi::SendableHelper<PIDController> {
  public:
   /**
    * Allocates a PIDController with the given constants for Kp, Ki, and Kd.

wpimath/src/main/native/include/frc/controller/ProfiledPIDController.h

@@ -9,6 +9,7 @@
 #include <functional>
 #include <limits>
 
+#include <wpi/SymbolExports.h>
 #include <wpi/sendable/Sendable.h>
 #include <wpi/sendable/SendableBuilder.h>
 #include <wpi/sendable/SendableHelper.h>
@@ -20,6 +21,7 @@
 
 namespace frc {
 namespace detail {
+WPILIB_DLLEXPORT
 void ReportProfiledPIDController();
 }  // namespace detail
 

wpimath/src/main/native/include/frc/controller/RamseteController.h

@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <wpi/SymbolExports.h>
+
 #include "frc/geometry/Pose2d.h"
 #include "frc/kinematics/ChassisSpeeds.h"
 #include "frc/trajectory/Trajectory.h"
@@ -39,7 +41,7 @@ namespace frc {
  * See <https://file.tavsys.net/control/controls-engineering-in-frc.pdf> section
  * on Ramsete unicycle controller for a derivation and analysis.
  */
-class RamseteController {
+class WPILIB_DLLEXPORT RamseteController {
  public:
   /**
    * Construct a Ramsete unicycle controller.