Improve and simplify function and header detection logic.

Simplify autoconf checks by using AC_CHECK_FUNCS/HEADERS.
Clarify some ambiguous dependencies around strnlen/strndup.
Unconditionally enable pidwraptest for all arc4random implementations.
Remove HAVE_VASPRINTF conditional, since asprintf requires vasprintf.

ok @doug

1 files changed, 2 insertions, 2 deletions

diff --git a/include/unistd.h b/include/unistd.h
index 037b11a..38caeb1 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -3,11 +3,11 @@
 #ifndef LIBCRYPTOCOMPAT_UNISTD_H
 #define LIBCRYPTOCOMPAT_UNISTD_H
 
-#ifdef NO_GETENTROPY
+#ifndef HAVE_GETENTROPY
 int getentropy(void *buf, size_t buflen);
 #endif
 
-#ifdef NO_ISSETUGID
+#ifndef HAVE_ISSETUGID
 int issetugid(void);
 #endif