diff --git a/renderdoc/driver/gl/gl_resources.cpp b/renderdoc/driver/gl/gl_resources.cpp
index eced5bceb..3315acf88 100644
--- a/renderdoc/driver/gl/gl_resources.cpp
+++ b/renderdoc/driver/gl/gl_resources.cpp
@@ -216,6 +216,8 @@ GLenum GetBaseFormat(GLenum internalFormat)
 		case eGL_STENCIL_INDEX8:
 		case eGL_STENCIL_INDEX16:
 			return eGL_STENCIL;
+		default:
+			break;
 	}
 
 	RDCERR("Unhandled Base Format case!");
@@ -314,6 +316,8 @@ GLenum GetDataType(GLenum internalFormat)
 			return eGL_FLOAT_32_UNSIGNED_INT_24_8_REV;
 		case eGL_STENCIL_INDEX8:
 			return eGL_UNSIGNED_BYTE;
+		default:
+			break;
 	}
 
 	RDCERR("Unhandled Data Type case!");
diff --git a/renderdoc/hooks/gl_linux_hooks.cpp b/renderdoc/hooks/gl_linux_hooks.cpp
index 4fafd0a9d..5b83be1b8 100644
--- a/renderdoc/hooks/gl_linux_hooks.cpp
+++ b/renderdoc/hooks/gl_linux_hooks.cpp
@@ -38,6 +38,7 @@
 namespace Keyboard { extern Display *CurrentXDisplay; }
 
 typedef GLXContext (*PFNGLXCREATECONTEXTPROC)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
+typedef void (*PFNGLXDESTROYCONTEXTPROC)(Display *dpy, GLXContext ctx);
 typedef const char *(*PFNGLXQUERYEXTENSIONSSTRING)(Display *dpy, int screen);
 typedef Bool (*PFNGLXMAKECURRENTPROC)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
 typedef void (*PFNGLXSWAPBUFFERSPROC)(Display *dpy, GLXDrawable drawable);
diff --git a/renderdoc/os/linux/linux_process.cpp b/renderdoc/os/linux/linux_process.cpp
index b1da16b92..c017b4ed4 100644
--- a/renderdoc/os/linux/linux_process.cpp
+++ b/renderdoc/os/linux/linux_process.cpp
@@ -43,7 +43,6 @@ uint32_t Process::CreateAndInjectIntoProcess(const wchar_t *app, const wchar_t *
 void Process::StartGlobalHook(const wchar_t *pathmatch, const wchar_t *logfile, const CaptureOptions *opts)
 {
 	RDCUNIMPLEMENTED();
-	return 0;
 }
 
 void *Process::GetFunctionAddress(const char *module, const char *function)