diff --git a/CHANGELOG.md b/CHANGELOG.md
index 066786e09..9be1267e1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -61,7 +61,8 @@
 - Added `BusToSignalAdapter` component for communicating bus voltages and injection currents.
 - Added cmake-format hooks, including in pre-commit.
 - Added off-nominal tap ratio and phase shift support to the PhasorDynamics `Branch` model.
-- Added portable Vector class to GridKit
+- Added portable Vector class to GridKit.
+- Added Windows compatibility.
 
 ## v0.1
 
diff --git a/GridKit/CommonMath.hpp b/GridKit/CommonMath.hpp
index e4a7ec87f..db6cab1cb 100644
--- a/GridKit/CommonMath.hpp
+++ b/GridKit/CommonMath.hpp
@@ -4,6 +4,7 @@
 #include <cmath>
 
 #include <GridKit/Constants.hpp>
+#include <GridKit/Definitions.hpp>
 #include <GridKit/ScalarTraits.hpp>
 
 namespace GridKit
@@ -34,7 +35,7 @@ namespace GridKit
      * @return value of the sigmoid function
      */
     template <class ScalarT>
-    __attribute__((always_inline)) inline ScalarT sigmoid(const ScalarT x)
+    FORCE_INLINE ScalarT sigmoid(const ScalarT x)
     {
       using RealT = typename GridKit::ScalarTraits<ScalarT>::RealT;
       return HALF<RealT> * (ONE<RealT> + std::tanh(HALF<RealT> * MU<RealT> * x));
@@ -52,7 +53,7 @@ namespace GridKit
      * @return value of the smooth ramp function
      */
     template <class ScalarT>
-    __attribute__((always_inline)) inline ScalarT ramp(const ScalarT x)
+    FORCE_INLINE ScalarT ramp(const ScalarT x)
     {
       using RealT = typename GridKit::ScalarTraits<ScalarT>::RealT;
 
@@ -76,7 +77,7 @@ namespace GridKit
      * @return value of the quadratic ramp
      */
     template <class ScalarT>
-    __attribute__((always_inline)) inline ScalarT qramp(const ScalarT x)
+    FORCE_INLINE ScalarT qramp(const ScalarT x)
     {
       return x * x * sigmoid(x);
     }
@@ -101,7 +102,7 @@ namespace GridKit
      * forcing callers to cast every parameter.
      */
     template <class LeftT, class RightT>
-    __attribute__((always_inline)) inline auto max(
+    FORCE_INLINE auto max(
         const LeftT  x,
         const RightT y)
     {
@@ -128,7 +129,7 @@ namespace GridKit
      * forcing callers to cast every parameter.
      */
     template <class LeftT, class RightT>
-    __attribute__((always_inline)) inline auto min(
+    FORCE_INLINE auto min(
         const LeftT  x,
         const RightT y)
     {
@@ -152,7 +153,7 @@ namespace GridKit
      * @return value of the smooth clamp function
      */
     template <class ScalarT, typename LowerT, typename UpperT>
-    __attribute__((always_inline)) inline auto clamp(
+    FORCE_INLINE auto clamp(
         const ScalarT x,
         const LowerT  lower,
         const UpperT  upper)
@@ -176,7 +177,7 @@ namespace GridKit
      * @return Smooth deadbanded value
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT deadband(
+    FORCE_INLINE ScalarT deadband(
         const ScalarT x,
         const RealT   lower,
         const RealT   upper)
@@ -198,7 +199,7 @@ namespace GridKit
      * @return Slew-rate-limited value of f
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT slew(
+    FORCE_INLINE ScalarT slew(
         const ScalarT f,
         const RealT   rate)
     {
@@ -223,7 +224,7 @@ namespace GridKit
      * @return Smooth linear segment contribution
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT linseg(
+    FORCE_INLINE ScalarT linseg(
         const ScalarT x,
         const RealT   lower,
         const RealT   upper,
@@ -244,7 +245,7 @@ namespace GridKit
      * @return Smooth indicator that x is above limit_min
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT above(
+    FORCE_INLINE ScalarT above(
         const ScalarT x,
         const RealT   limit_min)
     {
@@ -262,7 +263,7 @@ namespace GridKit
      * @return Smooth indicator that x is below limit_max
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT below(
+    FORCE_INLINE ScalarT below(
         const ScalarT x,
         const RealT   limit_max)
     {
@@ -281,7 +282,7 @@ namespace GridKit
      * @return Smooth indicator that x is inside [limit_min, limit_max]
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT inside(
+    FORCE_INLINE ScalarT inside(
         const ScalarT x,
         const RealT   limit_min,
         const RealT   limit_max)
@@ -302,7 +303,7 @@ namespace GridKit
      * @return Smooth indicator that x is outside [limit_min, limit_max]
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT outside(
+    FORCE_INLINE ScalarT outside(
         const ScalarT x,
         const RealT   limit_min,
         const RealT   limit_max)
@@ -325,7 +326,7 @@ namespace GridKit
      *         0 when integration should be blocked.
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT indicator(
+    FORCE_INLINE ScalarT indicator(
         const ScalarT x,
         const ScalarT f,
         const RealT   limit_min,
@@ -359,7 +360,7 @@ namespace GridKit
      * @return Smooth anti-windup limited derivative
      */
     template <class ScalarT, typename RealT>
-    __attribute__((always_inline)) inline ScalarT antiwindup(
+    FORCE_INLINE ScalarT antiwindup(
         const ScalarT x,
         const ScalarT f,
         const RealT   limit_min,
diff --git a/GridKit/Definitions.hpp.in b/GridKit/Definitions.hpp.in
index 10215709d..2c979ecb7 100644
--- a/GridKit/Definitions.hpp.in
+++ b/GridKit/Definitions.hpp.in
@@ -10,3 +10,11 @@
 #define GRIDKIT_VERSION_MAJOR "@GridKit_VERSION_MAJOR@"
 #define GRIDKIT_VERSION_MINOR "@GridKit_VERSION_MINOR@"
 #define GRIDKIT_VERSION_PATCH "@GridKit_VERSION_PATCH@"
+
+#if defined(__MINGW32__) || defined(__clang__) || defined(__GNUC__)
+    #define FORCE_INLINE __attribute__((always_inline)) inline
+#elif defined(_MSC_VER)
+    #define FORCE_INLINE [[msvc::forceinline]] inline
+#else
+    #define FORCE_INLINE __attribute__((always_inline)) inline
+#endif
diff --git a/GridKit/Model/PhasorDynamics/Branch/Branch.hpp b/GridKit/Model/PhasorDynamics/Branch/Branch.hpp
index 84149f8a4..02a1817a0 100644
--- a/GridKit/Model/PhasorDynamics/Branch/Branch.hpp
+++ b/GridKit/Model/PhasorDynamics/Branch/Branch.hpp
@@ -134,17 +134,17 @@ namespace GridKit
                              typename ModelDataT::Parameters parameter,
                              RealT&                          target);
 
-      static __attribute__((always_inline)) inline void addAdmittanceContribution(RealT          G,
-                                                                                  RealT          B,
-                                                                                  const ScalarT& Vr,
-                                                                                  const ScalarT& Vi,
-                                                                                  ScalarT&       Ir,
-                                                                                  ScalarT&       Ii);
-
-      static __attribute__((always_inline)) inline void evaluateAdmittanceBlock(RealT          G,
-                                                                                RealT          B,
-                                                                                const ScalarT* wb,
-                                                                                ScalarT*       h);
+      static FORCE_INLINE void addAdmittanceContribution(RealT          G,
+                                                         RealT          B,
+                                                         const ScalarT& Vr,
+                                                         const ScalarT& Vi,
+                                                         ScalarT&       Ir,
+                                                         ScalarT&       Ii);
+
+      static FORCE_INLINE void evaluateAdmittanceBlock(RealT          G,
+                                                       RealT          B,
+                                                       const ScalarT* wb,
+                                                       ScalarT*       h);
 
       ScalarT& Vr1()
       {
@@ -187,10 +187,10 @@ namespace GridKit
       }
 
     public:
-      __attribute__((always_inline)) inline int evaluateBusResidual11(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateBusResidual12(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateBusResidual21(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateBusResidual22(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual11(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual12(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual21(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual22(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
     private:
       BusT* bus1_;
diff --git a/GridKit/Model/PhasorDynamics/Branch/BranchImpl.hpp b/GridKit/Model/PhasorDynamics/Branch/BranchImpl.hpp
index 1fe3977f0..05d750e4d 100644
--- a/GridKit/Model/PhasorDynamics/Branch/BranchImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Branch/BranchImpl.hpp
@@ -174,7 +174,7 @@ namespace GridKit
     }
 
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline void Branch<scalar_type, index_type>::addAdmittanceContribution(
+    FORCE_INLINE void Branch<scalar_type, index_type>::addAdmittanceContribution(
         RealT          G,
         RealT          B,
         const ScalarT& Vr,
@@ -187,7 +187,7 @@ namespace GridKit
     }
 
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline void Branch<scalar_type, index_type>::evaluateAdmittanceBlock(
+    FORCE_INLINE void Branch<scalar_type, index_type>::evaluateAdmittanceBlock(
         RealT          G,
         RealT          B,
         const ScalarT* wb,
@@ -205,7 +205,7 @@ namespace GridKit
      *
      */
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline int Branch<scalar_type, index_type>::evaluateBusResidual11(
+    FORCE_INLINE int Branch<scalar_type, index_type>::evaluateBusResidual11(
         [[maybe_unused]] ScalarT* y,
         [[maybe_unused]] ScalarT* yp,
         ScalarT*                  wb,
@@ -221,7 +221,7 @@ namespace GridKit
      *
      */
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline int Branch<scalar_type, index_type>::evaluateBusResidual12(
+    FORCE_INLINE int Branch<scalar_type, index_type>::evaluateBusResidual12(
         [[maybe_unused]] ScalarT* y,
         [[maybe_unused]] ScalarT* yp,
         ScalarT*                  wb,
diff --git a/GridKit/Model/PhasorDynamics/BusFault/BusFault.hpp b/GridKit/Model/PhasorDynamics/BusFault/BusFault.hpp
index 3b559fd1b..63d408877 100644
--- a/GridKit/Model/PhasorDynamics/BusFault/BusFault.hpp
+++ b/GridKit/Model/PhasorDynamics/BusFault/BusFault.hpp
@@ -110,7 +110,7 @@ namespace GridKit
       }
 
     public:
-      __attribute__((always_inline)) inline int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
     private:
       BusT* bus_;
diff --git a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp
index add41ad66..4bcc81302 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp
@@ -122,7 +122,7 @@ namespace GridKit
 
         const Model::VariableMonitorBase* getMonitor() const override;
 
-        __attribute__((always_inline)) inline int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+        FORCE_INLINE int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
       private:
         // Signal pointers
diff --git a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp
index c055ad6b4..f844257bd 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp
@@ -279,7 +279,7 @@ namespace GridKit
        *
        */
       template <typename scalar_type, typename index_type>
-      __attribute__((always_inline)) inline int Ieeet1<scalar_type, index_type>::evaluateInternalResidual(
+      FORCE_INLINE int Ieeet1<scalar_type, index_type>::evaluateInternalResidual(
           ScalarT* y,
           ScalarT* yp,
           ScalarT* wb,
diff --git a/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPti.hpp b/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPti.hpp
index 56f5667d0..832109da8 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPti.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPti.hpp
@@ -103,7 +103,7 @@ namespace GridKit
 
         const Model::VariableMonitorBase* getMonitor() const override;
 
-        __attribute__((always_inline)) inline int evaluateInternalResidual(
+        FORCE_INLINE int evaluateInternalResidual(
             ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
       private:
diff --git a/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPtiImpl.hpp b/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPtiImpl.hpp
index e0de70fea..b3fc1787f 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPtiImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/SEXS-PTI/SexsPtiImpl.hpp
@@ -181,7 +181,7 @@ namespace GridKit
       }
 
       template <typename scalar_type, typename index_type>
-      __attribute__((always_inline)) inline int SexsPti<scalar_type, index_type>::evaluateInternalResidual(
+      FORCE_INLINE int SexsPti<scalar_type, index_type>::evaluateInternalResidual(
           ScalarT* y,
           ScalarT* yp,
           ScalarT* wb,
diff --git a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp
index f8ceb7207..9c67561df 100644
--- a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp
@@ -109,7 +109,7 @@ namespace GridKit
         }
 
       public:
-        __attribute__((always_inline)) inline int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+        FORCE_INLINE int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
       private:
         // Input parameters
diff --git a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp
index 29c4b07bd..cad6312f9 100644
--- a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp
@@ -237,7 +237,7 @@ namespace GridKit
        *
        */
       template <typename scalar_type, typename index_type>
-      __attribute__((always_inline)) inline int Tgov1<scalar_type, index_type>::evaluateInternalResidual(
+      FORCE_INLINE int Tgov1<scalar_type, index_type>::evaluateInternalResidual(
           ScalarT*                  y,
           ScalarT*                  yp,
           [[maybe_unused]] ScalarT* wb,
diff --git a/GridKit/Model/PhasorDynamics/Load/Load.hpp b/GridKit/Model/PhasorDynamics/Load/Load.hpp
index 33ce3cc1e..93803ef87 100644
--- a/GridKit/Model/PhasorDynamics/Load/Load.hpp
+++ b/GridKit/Model/PhasorDynamics/Load/Load.hpp
@@ -110,8 +110,8 @@ namespace GridKit
       const Model::VariableMonitorBase* getMonitor() const override;
 
     public:
-      __attribute__((always_inline)) inline int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
     private:
       BusT* bus_{nullptr};
diff --git a/GridKit/Model/PhasorDynamics/LoadZIP/LoadZIP.hpp b/GridKit/Model/PhasorDynamics/LoadZIP/LoadZIP.hpp
index ebe3a9be2..da7018f48 100644
--- a/GridKit/Model/PhasorDynamics/LoadZIP/LoadZIP.hpp
+++ b/GridKit/Model/PhasorDynamics/LoadZIP/LoadZIP.hpp
@@ -124,8 +124,8 @@ namespace GridKit
       const Model::VariableMonitorBase* getMonitor() const override;
 
     public:
-      __attribute__((always_inline)) inline int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
     private:
       BusT* bus_{nullptr};
diff --git a/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/Ieeest.hpp b/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/Ieeest.hpp
index 486f1820b..c6adac551 100644
--- a/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/Ieeest.hpp
+++ b/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/Ieeest.hpp
@@ -110,7 +110,7 @@ namespace GridKit
 
         const Model::VariableMonitorBase* getMonitor() const override;
 
-        __attribute__((always_inline)) inline int evaluateInternalResidual(
+        FORCE_INLINE int evaluateInternalResidual(
             ScalarT*,
             ScalarT*,
             [[maybe_unused]] ScalarT*,
diff --git a/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/IeeestImpl.hpp b/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/IeeestImpl.hpp
index 70b49977d..66d23d245 100644
--- a/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/IeeestImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Stabilizer/IEEEST/IeeestImpl.hpp
@@ -244,7 +244,7 @@ namespace GridKit
       }
 
       template <typename scalar_type, typename index_type>
-      __attribute__((always_inline)) inline int Ieeest<scalar_type, index_type>::evaluateInternalResidual(
+      FORCE_INLINE int Ieeest<scalar_type, index_type>::evaluateInternalResidual(
           ScalarT*                  y,
           ScalarT*                  yp,
           [[maybe_unused]] ScalarT* wb,
diff --git a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/Genrou.hpp b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/Genrou.hpp
index 73b6f764d..88464ee50 100644
--- a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/Genrou.hpp
+++ b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/Genrou.hpp
@@ -205,8 +205,8 @@ namespace GridKit
       }
 
     public:
-      __attribute__((always_inline)) inline int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
     private:
       /* Identification */
diff --git a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/GenrouImpl.hpp b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/GenrouImpl.hpp
index 9cbb0b587..4fd46a2a8 100644
--- a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/GenrouImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENROUwS/GenrouImpl.hpp
@@ -528,7 +528,7 @@ namespace GridKit
      *
      */
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline int Genrou<scalar_type, index_type>::evaluateInternalResidual(
+    FORCE_INLINE int Genrou<scalar_type, index_type>::evaluateInternalResidual(
         ScalarT* y,
         ScalarT* yp,
         ScalarT* wb,
@@ -606,7 +606,7 @@ namespace GridKit
      *
      */
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline int Genrou<scalar_type, index_type>::evaluateBusResidual(
+    FORCE_INLINE int Genrou<scalar_type, index_type>::evaluateBusResidual(
         ScalarT*                  y,
         [[maybe_unused]] ScalarT* yp,
         ScalarT*                  wb,
diff --git a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/Gensal.hpp b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/Gensal.hpp
index 8e00fc2e8..3ef0626d9 100644
--- a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/Gensal.hpp
+++ b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/Gensal.hpp
@@ -169,8 +169,8 @@ namespace GridKit
       }
 
     public:
-      __attribute__((always_inline)) inline int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
     private:
       /* Identification */
diff --git a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/GensalImpl.hpp b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/GensalImpl.hpp
index 9b779ded5..1e511a70d 100644
--- a/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/GensalImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/SynchronousMachine/GENSALwS/GensalImpl.hpp
@@ -351,7 +351,7 @@ namespace GridKit
      *
      */
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline int Gensal<scalar_type, index_type>::evaluateInternalResidual(
+    FORCE_INLINE int Gensal<scalar_type, index_type>::evaluateInternalResidual(
         ScalarT* y,
         ScalarT* yp,
         ScalarT* wb,
@@ -422,7 +422,7 @@ namespace GridKit
      *
      */
     template <typename scalar_type, typename index_type>
-    __attribute__((always_inline)) inline int Gensal<scalar_type, index_type>::evaluateBusResidual(
+    FORCE_INLINE int Gensal<scalar_type, index_type>::evaluateBusResidual(
         ScalarT*                  y,
         [[maybe_unused]] ScalarT* yp,
         ScalarT*                  wb,
diff --git a/GridKit/Model/PhasorDynamics/SynchronousMachine/GenClassical/GenClassical.hpp b/GridKit/Model/PhasorDynamics/SynchronousMachine/GenClassical/GenClassical.hpp
index a2696fc0d..87c4615fc 100644
--- a/GridKit/Model/PhasorDynamics/SynchronousMachine/GenClassical/GenClassical.hpp
+++ b/GridKit/Model/PhasorDynamics/SynchronousMachine/GenClassical/GenClassical.hpp
@@ -144,8 +144,8 @@ namespace GridKit
       }
 
     public:
-      __attribute__((always_inline)) inline int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
-      __attribute__((always_inline)) inline int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateInternalResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
+      FORCE_INLINE int evaluateBusResidual(ScalarT*, ScalarT*, ScalarT*, ScalarT*);
 
     private:
       /* Identification */
diff --git a/GridKit/Utilities/CliArgs/CliArgsImpl.hpp b/GridKit/Utilities/CliArgs/CliArgsImpl.hpp
index 000238b20..017c1f0f1 100644
--- a/GridKit/Utilities/CliArgs/CliArgsImpl.hpp
+++ b/GridKit/Utilities/CliArgs/CliArgsImpl.hpp
@@ -241,7 +241,11 @@ namespace GridKit
 
     void CliArgsImpl::parseArgs(int argc, const char* argv[])
     {
-      app_name_   = std::filesystem::path(argv[0]).filename();
+#if defined(_WIN32)
+      app_name_ = std::filesystem::path(argv[0]).filename().string();
+#else
+      app_name_ = std::filesystem::path(argv[0]).filename();
+#endif
       bool status = true;
 
       // Current argument (may involve multiple tokens)
diff --git a/GridKit/Utilities/String.hpp b/GridKit/Utilities/String.hpp
index 26e0d39e0..13c4ecfb4 100644
--- a/GridKit/Utilities/String.hpp
+++ b/GridKit/Utilities/String.hpp
@@ -12,7 +12,7 @@ namespace GridKit
     /**
      * @brief Convert a string to all uppercase
      */
-    std::string toUpper(std::string str)
+    inline std::string toUpper(std::string str)
     {
       std::transform(str.begin(), str.end(), str.begin(), [](unsigned char c)
                      { return std::toupper(c); });