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-rw-r--r--core/libdivecomputer.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/core/libdivecomputer.c b/core/libdivecomputer.c
index 7f0a459fc..2f0a303e3 100644
--- a/core/libdivecomputer.c
+++ b/core/libdivecomputer.c
@@ -17,6 +17,16 @@
#include <libdivecomputer/version.h>
#include "libdivecomputer.h"
+#if !defined(SSRF_LIBDC_VERSION)
+#pragma message "You are not compiling against the Subsurface branch of libdivecomputer"
+#pragma message "While this may still work, you are missing important features of Subsurface"
+#pragma message "Please get it from http://github.com/Subsurface-divelog/libdc Subsurface-branch"
+#else
+#if !defined(SSRF_CUSTOM_IO)
+#pragma message "You are compiling against an older version of the Subsurface branch of libdivecomputer"
+#pragma message "which doesn't support the new SSRF_CUSTOM_IO model. Please update libdc"
+#endif
+#endif
//
// If we have an old libdivecomputer, it doesn't
// have the new DC_TANKINFO bits, but just volume