build: avoid compiler warnings on cygwin 1.5

* src/copy.c (utimens_symlink): Avoid unused variables.
* src/su.c (getusershell): Rely on gnulib for prototype.

2 files changed, 3 insertions, 10 deletions

diff --git a/src/copy.c b/src/copy.c
index b7d113fbe..067b1e722 100644
--- a/src/copy.c
+++ b/src/copy.c
@@ -132,6 +132,9 @@ utimens_symlink (char const *file, struct timespec const *timespec)
      utimensat fails with ENOSYS.  Ignore that.  */
   if (err && errno == ENOSYS)
     err = 0;
+#else
+  (void) file;
+  (void) timespec;
 #endif
 
   return err;
diff --git a/src/su.c b/src/su.c
index ec50a3b5a..25b883814 100644
--- a/src/su.c
+++ b/src/su.c
@@ -53,16 +53,9 @@
 #include <pwd.h>
 #include <grp.h>
 
-/* Hide any system prototype for getusershell.
-   This is necessary because some Cray systems have a conflicting
-   prototype (returning `int') in <unistd.h>.  */
-#define getusershell _getusershell_sys_proto_
-
 #include "system.h"
 #include "getpass.h"
 
-#undef getusershell
-
 #if HAVE_SYSLOG_H && HAVE_SYSLOG
 # include <syslog.h>
 #else
@@ -119,9 +112,6 @@
 #define DEFAULT_USER "root"
 
 char *crypt (char const *key, char const *salt);
-char *getusershell (void);
-void endusershell (void);
-void setusershell (void);
 
 extern char **environ;