From b801444251f6c342c3daad2152f9a4f7215ea8ee Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Sun, 21 Jun 2020 12:31:48 +0200
Subject: Fix some warnings and move include statement to common.h
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 arg.h     |  4 ++--
 common.h  | 16 ++++++++++++++++
 sctrace.c |  7 ++++---
 util.c    |  5 +++++
 4 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/arg.h b/arg.h
index 971fc79..4f35620 100644
--- a/arg.h
+++ b/arg.h
@@ -9,7 +9,7 @@
 extern char *argv0;
 
 /* use main(int argc, char *argv[]) */
-#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
+#define ARGBEGIN	do { for (argv0 = *argv, argv++, argc--;\
 					argv[0] && argv[0][0] && argv[0][1];\
 					argc--, argv++) {\
 				char argc_;\
@@ -55,7 +55,7 @@ extern char *argv0;
 				} else {\
 					break;\
 				}\
-			}
+			} } while (0)
 
 #define ARGC()		argc_
 
diff --git a/common.h b/common.h
index 672aa37..43edb74 100644
--- a/common.h
+++ b/common.h
@@ -1,4 +1,5 @@
 /* See LICENSE file for copyright and license details. */
+#include <asm/unistd.h>
 #include <sys/uio.h>
 #include <sys/wait.h>
 #include <ctype.h>
@@ -12,6 +13,21 @@
 #include <string.h>
 #include <unistd.h>
 
+#if defined(__clang__)
+# define FALL_THROUGH __attribute__((fallthrough));
+#else
+# define FALL_THROUGH
+#endif
+
+#if defined(__clang__)
+# pragma clang diagnostic ignored "-Wdisabled-macro-expansion"
+# pragma clang diagnostic ignored "-Wpadded"
+#elif defined(__GNUC__)
+# pragma GCC diagnostic ignored "-Wpadded"
+# pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
+# pragma GCC diagnostic ignored "-Wsuggest-attribute=format"
+#endif
+
 #if defined(__linux__)
 # include "linux/os.h"
 #else
diff --git a/sctrace.c b/sctrace.c
index d7e1766..c13c5bb 100644
--- a/sctrace.c
+++ b/sctrace.c
@@ -1,14 +1,12 @@
 /* See LICENSE file for copyright and license details. */
 #include "common.h"
 
-#include <asm/unistd.h>
-
 
 char *argv0;
 static unsigned long int trace_options = PTRACE_O_EXITKILL | PTRACE_O_TRACESYSGOOD | PTRACE_O_TRACEEXEC;
 
 
-static void
+_Noreturn static void
 usage(void)
 {
 	fprintf(stderr, "usage: %s [-o trace-output-file] [-ft] (command | -0 command argv0) [argument] ...\n", argv0);
@@ -75,6 +73,7 @@ handle_syscall(struct process *proc)
 
 	case Exec:
 		proc->silent_until_execed -= (proc->silent_until_execed == 2);
+		FALL_THROUGH
 		/* fall through */
 	case VforkParent:
 		if (ptrace(PTRACE_SYSCALL, proc->pid, NULL, 0))
@@ -105,6 +104,7 @@ handle_event(struct process *proc, int status)
 
 	case PTRACE_EVENT_VFORK:
 		tprintf(proc, "\nProcess stopped by vfork until child exits or exec(2)s\n");
+		FALL_THROUGH
 		/* fall through */
 	case PTRACE_EVENT_FORK:
 	case PTRACE_EVENT_CLONE:
@@ -198,6 +198,7 @@ main(int argc, char **argv)
 	case 'f':
 		trace_options |= PTRACE_O_TRACEFORK;
 		trace_options |= PTRACE_O_TRACEVFORK;
+		FALL_THROUGH
 		/* fall through */
 	case 't':
 		trace_options |= PTRACE_O_TRACECLONE;
diff --git a/util.c b/util.c
index b2d8341..7888133 100644
--- a/util.c
+++ b/util.c
@@ -2,6 +2,11 @@
 #include "common.h"
 
 
+#if defined(__GNUC__) || defined(__clang__)
+# pragma GCC diagnostic ignored "-Wformat-nonliteral"
+#endif
+
+
 static FILE *trace_fp;
 static char last_char = '\n';
 static pid_t last_pid = 0;
-- 
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