- (dtucker) [INSTALL configure.ac] Make zlib version check test for 1.1.4 or

[openssh.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 3edf75a22ca4ceb1d465b51092218327673120c7..3a96fd3f9f91a9585e51e8fa73df3af40bb35977 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -643,29 +643,40 @@ AC_ARG_WITH(zlib-version-check,
        ]
 )
 
-AC_MSG_CHECKING(for zlib 1.1.4 or greater)
+AC_MSG_CHECKING(for possibly buggy zlib)
 AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <stdio.h>
 #include <zlib.h>
 int main()
 {
-       int a, b, c, v;
-       if (sscanf(ZLIB_VERSION, "%d.%d.%d", &a, &b, &c) != 3)
+       int a=0, b=0, c=0, d=0, n, v;
+       n = sscanf(ZLIB_VERSION, "%d.%d.%d.%d", &a, &b, &c, &d);
+       if (n != 3 && n != 4)
                exit(1);
-       v = a*1000000 + b*1000 + c;
-       if (v >= 1001004)
+       v = a*1000000 + b*10000 + c*100 + d;
+       fprintf(stderr, "found zlib version %s (%d)\n", ZLIB_VERSION, v);
+
+       /* 1.1.4 is OK */
+       if (a == 1 && b == 1 && c >= 4)
+               exit(0);
+
+       /* 1.2.1.2 and up are OK */
+       if (v >= 1020102)
                exit(0);
+
        exit(2);
 }
        ]])],
-       AC_MSG_RESULT(yes),
-       [ AC_MSG_RESULT(no)
+       AC_MSG_RESULT(no),
+       [ AC_MSG_RESULT(yes)
          if test -z "$zlib_check_nonfatal" ; then
                AC_MSG_ERROR([*** zlib too old - check config.log ***
 Your reported zlib version has known security problems.  It's possible your
 vendor has fixed these problems without changing the version number.  If you
 are sure this is the case, you can disable the check by running
 "./configure --without-zlib-version-check".
-If you are in doubt, upgrade zlib to version 1.1.4 or greater.])
+If you are in doubt, upgrade zlib to version 1.2.1.2 or greater.
+See http://www.gzip.org/zlib/ for details.])
          else
                AC_MSG_WARN([zlib version may have security problems])
          fi