diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a3514f9..687291a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,12 +1,6 @@
 name: Build/test suite
 
-on:
-  push:
-    branches:
-      mainline
-  pull_request:
-    branches:
-      mainline
+on: push
 
 jobs:
   build:
@@ -37,13 +31,20 @@ jobs:
           brew install mpfr catch2 eigen
 
       - name: CMake configure and build
-        uses: threeal/cmake-action@v2.0.0
+        uses: threeal/cmake-action@v2.1.0
         with:
           options: |
-            XPREC_BUILD_TESTING=${{ startsWith(matrix.os, 'windows') && 'OFF' || 'ON' }}
+            XPREC_BUILD_TESTING='ON'
+            CMAKE_VERBOSE_MAKEFILE='ON'
           run-build: true
 
-      - name: Run tests
-        if: (!startsWith(matrix.os, 'windows'))
+      # XXX this is a hack to allow CMake to find the library
+      - name: Move DLL to build directory
+        if: startsWith(matrix.os, 'windows')
         run: |
-          build/test/tests
+          copy build\\Debug\\xprec.dll build\\test
+
+      - name: Run unit tests
+        uses: threeal/ctest-action@v1.1.0
+        with:
+          verbose: true
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 469f716..faf18b8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,6 +42,16 @@ add_library(xprec SHARED
 if(NOT MSVC)
     target_compile_options(xprec PRIVATE -Wall -Wextra -pedantic)
 endif()
+if (MSVC)
+    cmake_minimum_required(VERSION 3.11..3.31)
+    target_compile_definitions(xprec PRIVATE
+        "XPREC_API_EXPORT=__declspec(dllexport)"
+        )
+    target_compile_definitions(xprec INTERFACE
+        "XPREC_API_EXPORT=__declspec(dllimport)"
+        )
+endif()
+
 target_include_directories(xprec PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
     $<INSTALL_INTERFACE:include>
diff --git a/include/xprec/ddouble-header-only.hpp b/include/xprec/ddouble-header-only.hpp
index ca25d30..a0acef5 100644
--- a/include/xprec/ddouble-header-only.hpp
+++ b/include/xprec/ddouble-header-only.hpp
@@ -14,7 +14,8 @@
 // The strategy for header only use of ddouble is pretty simple:
 // conditionally inline globally defined functions and include the cxx files
 // directly.
-#define XPREC_API_EXPORT inline
+#undef XPREC_API_EXPORT
+#define XPREC_API_EXPORT static
 
 #include "../../src/circular.cpp"
 #include "../../src/exp.cpp"
diff --git a/include/xprec/ddouble.hpp b/include/xprec/ddouble.hpp
index 736323c..d20c024 100644
--- a/include/xprec/ddouble.hpp
+++ b/include/xprec/ddouble.hpp
@@ -147,8 +147,6 @@ class DDouble {
 
     friend void swap(DDouble &x, DDouble &y);
 
-    friend std::ostream &operator<<(std::ostream &out, DDouble x);
-
 private:
     double _hi;
     double _lo;
@@ -236,38 +234,39 @@ class PowerOfTwo {
 // "using std::sin" and then call "sin".
 
 DDouble abs(DDouble a);
-DDouble acos(DDouble a);
-DDouble acosh(DDouble a);
-DDouble asin(DDouble a);
-DDouble asinh(DDouble a);
-DDouble atan(DDouble a);
-DDouble atan2(DDouble a, DDouble b);
-DDouble atanh(DDouble a);
 DDouble ceil(DDouble a);
-DDouble cos(DDouble a);
-DDouble cosh(DDouble a);
-DDouble exp(DDouble a);
-DDouble expm1(DDouble a);
 DDouble fabs(DDouble a);
 DDouble fmax(DDouble a, DDouble b);
 DDouble fmin(DDouble a, DDouble b);
 DDouble floor(DDouble a);
-DDouble hypot(DDouble a, DDouble b);
 DDouble ldexp(DDouble a, int m);
-DDouble log(DDouble a);
-DDouble log1p(DDouble a);
 DDouble logb(DDouble a);
-DDouble modf(DDouble a, DDouble *b);
-DDouble nextafter(DDouble a, DDouble b);
-DDouble pow(DDouble a, DDouble b);
-DDouble pow(DDouble a, int b);
 DDouble round(DDouble a);
 DDouble scalbn(DDouble a, int m);
-DDouble sin(DDouble a);
-DDouble sinh(DDouble a);
-DDouble sqrt(DDouble a);
-DDouble tan(DDouble a);
-DDouble tanh(DDouble a);
+
+XPREC_API_EXPORT DDouble acos(DDouble a);
+XPREC_API_EXPORT DDouble acosh(DDouble a);
+XPREC_API_EXPORT DDouble asin(DDouble a);
+XPREC_API_EXPORT DDouble asinh(DDouble a);
+XPREC_API_EXPORT DDouble atan(DDouble a);
+XPREC_API_EXPORT DDouble atan2(DDouble a, DDouble b);
+XPREC_API_EXPORT DDouble atanh(DDouble a);
+XPREC_API_EXPORT DDouble cos(DDouble a);
+XPREC_API_EXPORT DDouble cosh(DDouble a);
+XPREC_API_EXPORT DDouble exp(DDouble a);
+XPREC_API_EXPORT DDouble expm1(DDouble a);
+XPREC_API_EXPORT DDouble hypot(DDouble a, DDouble b);
+XPREC_API_EXPORT DDouble log(DDouble a);
+XPREC_API_EXPORT DDouble log1p(DDouble a);
+XPREC_API_EXPORT DDouble modf(DDouble a, DDouble *b);
+XPREC_API_EXPORT DDouble nextafter(DDouble a, DDouble b);
+XPREC_API_EXPORT DDouble pow(DDouble a, DDouble b);
+XPREC_API_EXPORT DDouble pow(DDouble a, int b);
+XPREC_API_EXPORT DDouble sin(DDouble a);
+XPREC_API_EXPORT DDouble sinh(DDouble a);
+XPREC_API_EXPORT DDouble sqrt(DDouble a);
+XPREC_API_EXPORT DDouble tan(DDouble a);
+XPREC_API_EXPORT DDouble tanh(DDouble a);
 
 int fpclassify(DDouble x);
 int ilogb(DDouble x);
@@ -277,6 +276,9 @@ bool isnan(DDouble x);
 bool isnormal(DDouble x);
 bool iszero(DDouble x);
 
+XPREC_API_EXPORT std::ostream &operator<<(std::ostream &out, DDouble x);
+
+
 /**
  * Gauss-Chebyshev quadrature rule.
  *
@@ -285,7 +287,7 @@ bool iszero(DDouble x);
  * the n-th Chebyshev polynomial. If w is given, store the quadrature weights
  * there.
  */
-void gauss_chebyshev(int n, DDouble x[], DDouble w[] = nullptr);
+XPREC_API_EXPORT void gauss_chebyshev(int n, DDouble x[], DDouble w[] = nullptr);
 
 /**
  * Gauss-Legendre quadrature rule.
@@ -294,10 +296,10 @@ void gauss_chebyshev(int n, DDouble x[], DDouble w[] = nullptr);
  * the Gauss-Legendre quadrature nodes of order n, i.e., the roots of the n-th
  * Legendre polynomial. If w is given, store the quadrature weights there.
  */
-void gauss_legendre(int n, DDouble x[], DDouble w[] = nullptr);
+XPREC_API_EXPORT void gauss_legendre(int n, DDouble x[], DDouble w[] = nullptr);
 
 /** Trigonometric complement sqrt(1 - x*x) to full precision. */
-DDouble trig_complement(DDouble x);
+XPREC_API_EXPORT DDouble trig_complement(DDouble x);
 
 } /* namespace xprec*/
 
diff --git a/include/xprec/version.h b/include/xprec/version.h
index e2b1544..ebe3be5 100644
--- a/include/xprec/version.h
+++ b/include/xprec/version.h
@@ -7,3 +7,7 @@
 #define XPREC_VERSION_MAJOR 0
 #define XPREC_VERSION_MINOR 6
 #define XPREC_VERSION_PATCH 0
+
+#ifndef XPREC_API_EXPORT
+#define XPREC_API_EXPORT
+#endif
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 95b0fbf..fa97066 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -15,33 +15,42 @@ FetchContent_Declare(
 FetchContent_MakeAvailable(Catch2)
 
 # MPFR is required for tests
-find_package(MPFR REQUIRED)
+find_package(MPFR)
 find_package(Eigen3 3.3)
 
 add_executable(tests
-    arith.cpp
-    circular.cpp
     convert.cpp
-    exp.cpp
     gauss.cpp
-    hyperbolic.cpp
     inline.cpp
     limits.cpp
-    mpfloat.cpp
     random.cpp
     round.cpp
-    sqrt.cpp
     )
-target_link_libraries(tests PRIVATE Catch2::Catch2WithMain)
-target_link_libraries(tests PRIVATE MPFR::MPFR)
-target_link_libraries(tests PRIVATE XPrec::xprec)
-target_compile_options(tests PRIVATE -Wall -Wextra)
 
+if (TARGET MPFR::MPFR)
+    target_sources(tests PRIVATE
+        arith.cpp
+        circular.cpp
+        exp.cpp
+        hyperbolic.cpp
+        mpfloat.cpp
+        sqrt.cpp
+        )
+    target_link_libraries(tests PRIVATE MPFR::MPFR)
+endif()
 if (TARGET Eigen3::Eigen)
     target_sources(tests PRIVATE eigen.cpp)
     target_link_libraries(tests PRIVATE Eigen3::Eigen)
 endif()
 
+target_link_libraries(tests PRIVATE Catch2::Catch2WithMain)
+target_link_libraries(tests PRIVATE XPrec::xprec)
+
+if (NOT MSVC)
+    target_compile_options(tests PRIVATE -Wall -Wextra)
+endif()
+
+
 if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.12")
     set_property(TARGET tests PROPERTY CXX_STANDARD 20)
 else()