print stub warnings to stderr

diff --git a/lib/librumprun_base/libc_stubs.c b/lib/librumprun_base/libc_stubs.c
index 9890e55a41b869e9a752549bfe22cb38530e3291..6dbdace75b91d02f61df41d5bc43421a526cd147 100644 (file)
--- a/lib/librumprun_base/libc_stubs.c
+++ b/lib/librumprun_base/libc_stubs.c
@@ -26,12 +26,12 @@
 #include <errno.h>
 #include <stdio.h>
 
-#define STUB(name)                             \
-  int name(void); int name(void) {             \
-       static int done = 0;                    \
-       errno = ENOTSUP;                        \
-       if (done) return ENOTSUP; done = 1;     \
-       printf("STUB ``%s'' called\n", #name);  \
+#define STUB(name)                                     \
+  int name(void); int name(void) {                     \
+       static int done = 0;                            \
+       errno = ENOTSUP;                                \
+       if (done) return ENOTSUP; done = 1;             \
+       fprintf(stderr, "STUB ``%s'' called\n", #name); \
        return ENOTSUP;}
 
 STUB(__sigaction14);
@@ -60,12 +60,13 @@ STUB(_sys___msync13);
 STUB(_sys___wait450);
 STUB(_sys___sigsuspend14);
 
+/* execve is open-coded to match the prototype to avoid a compiler warning */
 int execve(const char *, char *const[], char *const[]);
 int
 execve(const char *file, char *const argv[], char *const envp[])
 {
 
-       printf("execve not implemented\n");
+       fprintf(stderr, "execve not implemented\n");
        errno = ENOTSUP;
        return -1;
 }