Platform: none of EmscriptenApplication constructors were defined.

... when compiling w/o TARGET_GL.

src/Magnum/Platform/EmscriptenApplication.cpp

@@ -171,11 +171,13 @@ namespace {
     }
 }
 
-#ifdef MAGNUM_TARGET_GL
-EmscriptenApplication::EmscriptenApplication(const Arguments& arguments): EmscriptenApplication{arguments, Configuration{}, GLConfiguration{}} {}
+EmscriptenApplication::EmscriptenApplication(const Arguments& arguments): EmscriptenApplication{arguments, Configuration{}} {}
 
-EmscriptenApplication::EmscriptenApplication(const Arguments& arguments, const Configuration& configuration): EmscriptenApplication{arguments, configuration, GLConfiguration{}} {}
+EmscriptenApplication::EmscriptenApplication(const Arguments& arguments, const Configuration& configuration): EmscriptenApplication{arguments, NoCreate} {
+    create(configuration);
+}
 
+#ifdef MAGNUM_TARGET_GL
 EmscriptenApplication::EmscriptenApplication(const Arguments& arguments, const Configuration& configuration, const GLConfiguration& glConfiguration): EmscriptenApplication{arguments, NoCreate} {
     create(configuration, glConfiguration);
 }

src/Magnum/Platform/EmscriptenApplication.h

@@ -182,8 +182,16 @@ class EmscriptenApplication {
         /**
          * @brief Construct with given configuration
          *
-         * Equivalent to calling @ref EmscriptenApplication(const Arguments&, const Configuration&, const GLConfiguration&)
+         * If @ref Configuration::WindowFlag::Contextless is present or Magnum
+         * was not built with @ref MAGNUM_TARGET_GL, this creates a window
+         * without any GPU context attached, leaving that part on the user.
+         *
+         * If none of the flags is present and Magnum was built with
+         * @ref MAGNUM_TARGET_GL, this is equivalent to calling
+         * @ref EmscriptenApplication(const Arguments&, const Configuration&, const GLConfiguration&)
          * with default-constructed @ref GLConfiguration.
+         *
+         * See also @ref building-features for more information.
          */
         explicit EmscriptenApplication(const Arguments& arguments, const Configuration& configuration);