zlib: Do not generate zconf.h

Update #3254.

cpukit/include/zconf.h

@@ -12,7 +12,7 @@
  * Even better than compiling with -DZ_PREFIX would be to use configure to set
  * this permanently in zconf.h using "./configure --zprefix".
  */
-#ifdef Z_PREFIX     /* may be set to #if 1 by ./configure */
+#if 1 /* is set to #if 1 for RTEMS */
 
 /* all linked symbols */
 #  define _dist_code            z__dist_code
@@ -354,7 +354,7 @@ typedef uLong FAR uLongf;
    typedef Byte       *voidp;
 #endif
 
-#ifdef HAVE_UNISTD_H    /* may be set to #if 1 by ./configure */
+#if 1 /* is set to #if 1 for RTEMS */
 #  define Z_HAVE_UNISTD_H
 #endif
 

cpukit/zlib/Makefile.am

@@ -20,13 +20,5 @@ libz_a_SOURCES += zutil.c zutil.h
 
 include_HEADERS = zlib.h zconf.h
 
-zconf.h: $(srcdir)/zconf.h.in
-	sed \
-	  -e 's,#ifdef Z_PREFIX.* may be ,#if 1 /* was ,' \
-	  -e 's,#ifdef HAVE_UNISTD_H.* may be ,#if 1 /* was ,' \
-	< $(srcdir)/zconf.h.in > zconf.h
-CLEANFILES = zconf.h
-EXTRA_DIST = zconf.h.in
-
 include $(srcdir)/preinstall.am
 include $(top_srcdir)/automake/local.am