Win32: Add warning when option will have no effect
The GPU driver only looks in the executable for the symbol requesting
the high-performance GPU, so enabling them when buidling GLFW as a DLL
will have no effect.
(cherry picked from commit 52ba8c7f07574d56955099179f35569e07e2001c)
diff --git a/src/win32_init.c b/src/win32_init.c
index a7a6be6..22c1ba7 100644
--- a/src/win32_init.c
+++ b/src/win32_init.c
@@ -39,6 +39,10 @@
#if defined(_GLFW_USE_HYBRID_HPG) || defined(_GLFW_USE_OPTIMUS_HPG)
+#if defined(_GLFW_BUILD_DLL)
+ #warning "These symbols must be exported by the executable and have no effect in a DLL"
+#endif
+
// Executables (but not DLLs) exporting this symbol with this value will be
// automatically directed to the high-performance GPU on Nvidia Optimus systems
// with up-to-date drivers
