dco + do not require gcc

Signed-off-by: Mattias Andrée <maandree@member.fsf.org>

5 files changed, 33 insertions, 6 deletions

diff --git a/src/auth/pam.c b/src/auth/pam.c
index ed220a9..b418d18 100644
--- a/src/auth/pam.c
+++ b/src/auth/pam.c
@@ -32,7 +32,10 @@
 #define __failed(RC)  ((RC) != PAM_SUCCESS)
 
 
-static void quit_pam(int sig) __attribute__((noreturn));
+#ifdef __GNUC__
+__attribute__((noreturn))
+#endif
+static void quit_pam(int sig);
 
 static int conv_pam(int num_msg, const struct pam_message** msg, struct pam_response** resp, void* appdata_ptr);
 
@@ -73,8 +76,10 @@ static char auto_authenticated = 1;
 static char* (*passphrase_reader)(void) = NULL;
 
 
+#ifdef __GNUC__
 # pragma GCC diagnostic push
 # pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
+#endif
 /**
  * Exit if a PAM instruction failed
  * 
@@ -92,7 +97,9 @@ static void do_pam(int rc)
       _exit(1);
     }
 }
+#ifdef __GNUC__
 # pragma GCC diagnostic pop
+#endif
 
 
 /**
diff --git a/src/cerberus.c b/src/cerberus.c
index a5304a7..c22690e 100644
--- a/src/cerberus.c
+++ b/src/cerberus.c
@@ -460,6 +460,9 @@ void do_login(int argc, char** argv)
 
 
 #if AUTH > 0
+/**
+ * Called before the process exits, to do cleanup
+ */
 void preexit(void)
 {
   if (skip_auth == 0)
@@ -492,7 +495,9 @@ char* read_passphrase(void)
 #endif
 
 
+#ifdef __GNUC__
 # pragma GCC optimize "-O0"
+#endif
 
 
 /**
@@ -512,7 +517,10 @@ void destroy_passphrase(void)
 /**
  * Wipe the passphrase when the program exits
  */
-static __attribute__((destructor)) void passphrase_destructor(void)
+#ifdef __GNUC__
+__attribute__((destructor))
+#endif
+static void passphrase_destructor(void)
 {
   destroy_passphrase();
 }
diff --git a/src/cerberus.h b/src/cerberus.h
index d73ffc1..5db38b1 100644
--- a/src/cerberus.h
+++ b/src/cerberus.h
@@ -63,7 +63,10 @@ char* read_passphrase(void);
 #define read_passphrase()  NULL
 #endif
 
-void destroy_passphrase(void) __attribute__((optimize("-O0")));
+#ifdef __GNUC__
+__attribute__((optimize("-O0")))
+#endif
+void destroy_passphrase(void);
 
 
 #endif
diff --git a/src/login.h b/src/login.h
index 53a39cb..bfa088a 100644
--- a/src/login.h
+++ b/src/login.h
@@ -56,7 +56,10 @@ void set_environ(struct passwd* entry, char preserve_env);
  * 
  * @param  entry  The user entry in the password file
  */
-void exec_shell(struct passwd* entry) __attribute__((noreturn));
+#ifdef __GNUC__
+__attribute__((noreturn))
+#endif
+void exec_shell(struct passwd* entry);
 
 
 #endif
diff --git a/src/quit.h b/src/quit.h
index 957d463..630251d 100644
--- a/src/quit.h
+++ b/src/quit.h
@@ -25,14 +25,20 @@
  * 
  * @param  signal  The signal the program received
  */
-void timeout_quit(int signal) __attribute__((noreturn));
+#ifdef __GNUC__
+__attribute__((noreturn))
+#endif
+void timeout_quit(int signal);
 
 /**
  * Quit function for user aborts
  * 
  * @param  signal  The signal the program received
  */
-void user_quit(int signal) __attribute__((noreturn));
+#ifdef __GNUC__
+__attribute__((noreturn))
+#endif
+void user_quit(int signal);
 
 
 #endif