[gcc(refs/users/aoliva/heads/testme)] declare getpass in analyzer/sensitive-1.c test

[Alexandre Oliva <aoliva@gcc.gnu.org>]

https://gcc.gnu.org/g:a157d8c865f63d7b67b9dcc9a7ca72f06cc6ade1

commit a157d8c865f63d7b67b9dcc9a7ca72f06cc6ade1
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Thu Dec 31 21:38:17 2020 -0300

    declare getpass in analyzer/sensitive-1.c test
    
    The getpass function is not available on all systems; and not
    necessarily declared in unistd.h, as expected by the sensitive-1
    analyzer test.
    
    Since this is a compile-only test, it doesn't really matter if the
    function is defined in the system libraries.  All we need is a
    declaration, to avoid warnings from calling an undeclared function.
    This patch adds the declaration, in a way that is most unlikely to
    conflict with any existing declaration.
    
    
    for  gcc/testsuite/ChangeLog
    
            * gcc.dg/analyzer/sensitive-1.c: Declare getpass.

Diff:
---
 gcc/testsuite/gcc.dg/analyzer/sensitive-1.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c b/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c
index 81144af620e..c66af927617 100644
--- a/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c
+++ b/gcc/testsuite/gcc.dg/analyzer/sensitive-1.c
@@ -6,6 +6,11 @@
 
 #include <string.h>
 
+/* Declare getpass, in case unistd doesn't declare it.
+   Parenthesize it, in case it's a macro.
+   Don't use a prototype, to avoid const mismatches.  */
+extern char *(getpass) ();
+
 char test_1 (FILE *logfile)
 {
   char *password = getpass (">"); /* { dg-message "\\(1\\) sensitive value acquired here" } */