add func_attr_printf in :

log.c
message.c
strings.c

fixed some printf warnings in:

src/nvim/undo.c
src/nvim/eval.c
src/nvim/eval/encode.c
src/nvim/eval/typval.c
src/nvim/ex_getln.c
src/nvim/fileio.c
src/nvim/lua/executor.c
src/nvim/main.c
src/nvim/regexp_nfa.c
src/nvim/shada.c
src/nvim/spellfile.c
src/nvim/tui/terminfo.c
src/nvim/garray.h

1 files changed, 2 insertions, 1 deletions

diff --git a/src/nvim/log.c b/src/nvim/log.c
index 578217db41..4cafd4573b 100644
--- a/src/nvim/log.c
+++ b/src/nvim/log.c
@@ -103,7 +103,7 @@ void log_unlock(void)
 /// @param line_num   source line number, or -1
 bool logmsg(int log_level, const char *context, const char *func_name,
             int line_num, bool eol, const char *fmt, ...)
-  FUNC_ATTR_UNUSED
+  FUNC_ATTR_UNUSED FUNC_ATTR_PRINTF(6, 7)
 {
   if (log_level < MIN_LOG_LEVEL) {
     return false;
@@ -240,6 +240,7 @@ end:
 static bool do_log_to_file(FILE *log_file, int log_level, const char *context,
                            const char *func_name, int line_num, bool eol,
                            const char* fmt, ...)
+  FUNC_ATTR_PRINTF(7, 8)
 {
   va_list args;
   va_start(args, fmt);