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-rw-r--r--src/cg-base.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/cg-base.h b/src/cg-base.h
index 74b5550..662f044 100644
--- a/src/cg-base.h
+++ b/src/cg-base.h
@@ -46,6 +46,7 @@ extern libcoopgamma_crtc_info_t* crtc_info;
extern size_t crtcs_n;
+
/**
* Print usage information and exit
*/
@@ -68,6 +69,9 @@ extern void usage(void);
* 1 if `arg` was used,
* -1 on error
*/
+#if defined(__GNUC__)
+__attribute__((__nonnull__(1)))
+#endif
extern int handle_opt(char* opt, char* arg);
/**
@@ -81,5 +85,8 @@ extern int handle_opt(char* opt, char* arg);
* @param crtcs The arguments associated with the "-c" options, `NULL`-terminated
* @return Zero on success, -1 on error
*/
+#if defined(__GNUC__)
+__attribute__((__nonnull__(2)))
+#endif
extern int handle_args(int argc, char* argv[], char* method, char* site, char** crtcs);