python: fix PyInit_* declarations to work on Windows as well.

Co-authored-by: Cameron Egbert <cegbert@oculus.com>

src/python/corrade/containers.cpp

@@ -636,7 +636,7 @@ void containers(py::module& m) {
 #ifndef CORRADE_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_containers();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_containers();
 PYBIND11_MODULE(containers, m) {
     corrade::containers(m);
 }

src/python/magnum/gl.cpp

@@ -496,7 +496,7 @@ void gl(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_gl();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_gl();
 PYBIND11_MODULE(gl, m) {
     magnum::gl(m);
 }

src/python/magnum/magnum.cpp

@@ -216,7 +216,7 @@ void magnum(py::module& m) {
 
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit__magnum();
+extern "C" PYBIND11_EXPORT PyObject* PyInit__magnum();
 PYBIND11_MODULE(_magnum, m) {
     /* We need ArrayView for images */
     py::module::import("corrade.containers");

src/python/magnum/meshtools.cpp

@@ -64,7 +64,7 @@ void meshtools(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_meshtools();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_meshtools();
 PYBIND11_MODULE(meshtools, m) {
     magnum::meshtools(m);
 }

src/python/magnum/platform/egl.cpp

@@ -74,7 +74,7 @@ void egl(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_egl();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_egl();
 PYBIND11_MODULE(egl, m) {
     magnum::platform::egl(m);
 }

src/python/magnum/platform/glfw.cpp

@@ -126,7 +126,7 @@ void glfw(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_glfw();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_glfw();
 PYBIND11_MODULE(glfw, m) {
     magnum::platform::glfw(m);
 }

src/python/magnum/platform/glx.cpp

@@ -74,7 +74,7 @@ void glx(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_glx();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_glx();
 PYBIND11_MODULE(glx, m) {
     magnum::platform::glx(m);
 }

src/python/magnum/platform/sdl2.cpp

@@ -134,7 +134,7 @@ void sdl2(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_sdl2();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_sdl2();
 PYBIND11_MODULE(sdl2, m) {
     magnum::platform::sdl2(m);
 }

src/python/magnum/primitives.cpp

@@ -60,7 +60,7 @@ void primitives(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_primitives();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_primitives();
 PYBIND11_MODULE(primitives, m) {
     magnum::primitives(m);
 }

src/python/magnum/scenegraph.cpp

@@ -178,7 +178,7 @@ void scenegraph(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_scenegraph();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_scenegraph();
 PYBIND11_MODULE(scenegraph, m) {
     magnum::scenegraph(m);
 }

src/python/magnum/shaders.cpp

@@ -155,7 +155,7 @@ void shaders(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_shaders();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_shaders();
 PYBIND11_MODULE(shaders, m) {
     magnum::shaders(m);
 }

src/python/magnum/trade.cpp

@@ -55,7 +55,7 @@ void trade(py::module& m) {
 #ifndef MAGNUM_BUILD_STATIC
 /* TODO: remove declaration when https://github.com/pybind/pybind11/pull/1863
    is released */
-extern "C" PyObject* PyInit_trade();
+extern "C" PYBIND11_EXPORT PyObject* PyInit_trade();
 PYBIND11_MODULE(trade, m) {
     magnum::trade(m);
 }