diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eecace7..2db1279 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,10 +25,14 @@ jobs:
       fail-fast: false
       matrix:
         os:
+          - ubuntu-24.04
           - ubuntu-22.04
           - ubuntu-20.04
+          - macos-15
           - macos-14
           - macos-13
+          - windows-2022
+          - windows-2019
     steps:
     - uses: actions/checkout@v4
     - run:  bash -x build-cmake.sh
@@ -40,8 +44,10 @@ jobs:
       fail-fast: false
       matrix:
         os:
+          - ubuntu-24.04
           - ubuntu-22.04
           - ubuntu-20.04
+          - macos-15
           - macos-14
           - macos-13
     steps:
@@ -58,8 +64,10 @@ jobs:
       fail-fast: false
       matrix:
         os:
+          - ubuntu-24.04
           - ubuntu-22.04
           - ubuntu-20.04
+          - macos-15
           - macos-14
           - macos-13
     steps:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 73ca518..be482fd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,11 @@
 cmake_minimum_required(VERSION 3.5.0)
-project(mpi-stubs VERSION 4.2 LANGUAGES C)
+project(mpi-abi-stubs VERSION 5.0 LANGUAGES C)
 
 option(BUILD_SHARED_LIBS "Build libraries as SHARED" TRUE)
 
 add_library(mpi_abi mpistubs.c)
 set_target_properties(mpi_abi PROPERTIES VERSION 0)
+set_target_properties(mpi_abi PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS 1)
 
 include(GNUInstallDirs)
 install(FILES mpi.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
diff --git a/build-cmake.sh b/build-cmake.sh
index 1946a67..2f2c344 100755
--- a/build-cmake.sh
+++ b/build-cmake.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 set -eu
 cmake -B build -DCMAKE_INSTALL_PREFIX="${PREFIX:-$PWD}"
-cmake --build build
-cmake --install build
+cmake --build build --config Release
+cmake --install build --config Release
 (test -d lib64 && ln -f -s lib64 lib) || true
diff --git a/check.sh b/check.sh
index 3695549..7f9febf 100755
--- a/check.sh
+++ b/check.sh
@@ -6,12 +6,18 @@ export PATH=${prefix}/bin:$PATH
 
 case "$(uname)" in
     Linux)
+        lib="lib"
         so=".so"
         ;;
     Darwin)
         ldd () { otool -L "$1"; }
+        lib="lib"
         so=".dylib"
         ;;
+    *_NT-*)
+        lib=""
+        so=".dll"
+        ;;
 esac
 
 tempdir="$(mktemp -d)"
@@ -41,13 +47,11 @@ command -v mpicc
 command -v mpicxx
 echo "$(mpicc -show-incdir)/mpi.h":
 grep -E 'MPI_(SUB)?VERSION' "$(mpicc -show-incdir)/mpi.h"
-echo "$(mpicc -show-libdir)/lib$(mpicc -show-libs)$so":
-ldd "$(mpicc -show-libdir)/lib$(mpicc -show-libs)$so"
+echo "$(mpicc -show-libdir)/$lib$(mpicc -show-libs)$so":
+ldd "$(mpicc -show-libdir)/$lib$(mpicc -show-libs)$so"
 
 set -x
 
-RPATH=-Wl,-rpath,$(mpicc -show-libdir)
-
 mpicc -show
 mpicc -show-incdir
 mpicc -show-libdir
@@ -58,8 +62,8 @@ for cc in gcc clang; do
     diff cc.log mpicc.log
     mpicc -cc="$cc" ./helloworld.c -c
     test -f helloworld.o && rm helloworld.o
-    mpicc -cc="$cc" ./helloworld.c "$RPATH"
-    ldd a.out && rm a.out
+    mpicc -cc="$cc" ./helloworld.c -o hw.exe
+    ldd hw.exe && rm hw.exe
 done
 
 mpicxx -show
@@ -72,6 +76,6 @@ for cxx in g++ clang++; do
     diff cxx.log mpicxx.log
     mpicxx -cxx="$cxx" ./helloworld.cxx -c
     test -f helloworld.o && rm helloworld.o
-    mpicxx -cxx="$cxx" ./helloworld.cxx "$RPATH"
-    ldd a.out && rm a.out
+    mpicxx -cxx="$cxx" ./helloworld.cxx -o hw.exe
+    ldd hw.exe && rm hw.exe
 done