From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Wed, 31 Mar 2021 02:08:49 +0000 (-0700)
Subject: remove internal definitions of NULL
X-Git-Tag: 2.47.1~12^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7825c089c647ffbde59d0201f1e1bf0a9b17373b;p=graphviz

remove internal definitions of NULL

ISO C guarantees this to exist via stddef.h or stdlib.h.
---

diff --git a/lib/common/logic.h b/lib/common/logic.h
index 209382504..17f48f77f 100644
--- a/lib/common/logic.h
+++ b/lib/common/logic.h
@@ -32,10 +32,6 @@ extern "C" {
 #define NOTUSED(var) (void) var
 #endif
 
-#ifndef NULL
-#define NULL (void *)0
-#endif
-
 #ifndef NIL
 #define NIL(type) ((type)0)
 #endif
diff --git a/lib/sfio/sfio.h b/lib/sfio/sfio.h
index 75238495e..116a7ceac 100644
--- a/lib/sfio/sfio.h
+++ b/lib/sfio/sfio.h
@@ -184,9 +184,6 @@ extern "C" {
 #define SFFMT_SET	07777770	/* flags settable on calling extf      */
 
 /* various constants */
-#ifndef NULL
-#define NULL		0
-#endif
 #ifndef EOF
 #define EOF		(-1)
 #endif
diff --git a/tclpkg/tclhandle/tclhandle.h b/tclpkg/tclhandle/tclhandle.h
index 1e26bee80..d425108e5 100644
--- a/tclpkg/tclhandle/tclhandle.h
+++ b/tclpkg/tclhandle/tclhandle.h
@@ -20,10 +20,6 @@ extern "C" {
 #define TCL_OK (0)
 #endif
 
-#ifndef NULL
-#define NULL (0)
-#endif
-
 #define ISSPACE(c) (isspace ((unsigned char) c))
 
 /*