warnings: Support non-literal arguments, and let the user choose the variable

[gnulib.git] / tests / test-c-stack.c

diff --git a/tests/test-c-stack.c b/tests/test-c-stack.c
index bcf72ad..96ab152 100644 (file)
--- a/tests/test-c-stack.c
+++ b/tests/test-c-stack.c
@@ -22,6 +22,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 #if HAVE_SETRLIMIT
+/* At least FreeBSD 5.0 needs extra headers before <sys/resource.h>
+   will compile.  */
+# include <sys/types.h>
+# include <sys/time.h>
 # include <sys/resource.h>
 #endif
 
@@ -37,30 +41,37 @@
     }                                                                       \
   while (0)
 
-static long
-recurse (char *p)
+char *program_name;
+
+static volatile int *
+recurse_1 (volatile int n, volatile int *p)
 {
-  char array[500];
-  array[0] = 1;
-  return *p + recurse (array);
+  if (n >= 0)
+    *recurse_1 (n + 1, p) += n;
+  return p;
 }
 
-char *program_name;
+static int
+recurse (volatile int n)
+{
+  int sum = 0;
+  return *recurse_1 (n, &sum);
+}
 
 int
 main (int argc, char **argv)
 {
-   program_name = argv[0];
 #if HAVE_SETRLIMIT && defined RLIMIT_STACK
-   /* Before starting the endless recursion, try to be friendly to the
-      user's machine.  On some Linux 2.2.x systems, there is no stack
-      limit for user processes at all.  We don't want to kill such
-      systems.  */
-   struct rlimit rl;
-   rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
-   setrlimit (RLIMIT_STACK, &rl);
+  /* Before starting the endless recursion, try to be friendly to the
+     user's machine.  On some Linux 2.2.x systems, there is no stack
+     limit for user processes at all.  We don't want to kill such
+     systems.  */
+  struct rlimit rl;
+  rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
+  setrlimit (RLIMIT_STACK, &rl);
 #endif
 
+  program_name = argv[0];
   if (c_stack_action (0) == 0)
     {
       if (1 < argc)
@@ -68,8 +79,9 @@ main (int argc, char **argv)
          exit_failure = 77;
          ++*argv[argc]; /* Intentionally dereference NULL.  */
        }
-      return recurse ("\1");
+      return recurse (0);
     }
+  fputs ("skipping test: ", stderr);
   perror ("c_stack_action");
   return 77;
 }