cpp: Constify cpp argv passed to cpp_exec

Pass argv as char *const argv[] as execvp expects it.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 1 insertions, 1 deletions

diff --git a/cpp.h b/cpp.h
index 45c42ac..1cf0a35 100644
--- a/cpp.h
+++ b/cpp.h
@@ -1,6 +1,6 @@
 #ifndef CPP_H
 #define CPP_H
 
-extern int cpp_exec(char *in_file, char *out_file, size_t out_len, char **argv);
+extern int cpp_exec(char *in_file, char *out_file, size_t out_len, char *const argv[]);
 
 #endif