krb5 commit [krb5-1.9]: Fail during configure if unable to find ar

[Tom Yu]

https://github.com/krb5/krb5/commit/5bcaa6341466c5887b18d13ecb5487de5f57cc29
commit 5bcaa6341466c5887b18d13ecb5487de5f57cc29
Author: Tom Yu <tlyu at mit.edu>
Date:   Wed Feb 22 19:27:56 2012 +0000

    Fail during configure if unable to find ar
    
    Fail during configure time if the configure script can't locate the
    "ar" program, instead of producing a delayed failure during build time
    by running the "false" command.  Some Solaris releases have ar in
    /usr/ccs/bin, which is not in the default path for some users.
    
    (cherry picked from commit 2c990e6418cd7cee7ca178a3175b07ed6a01ffae)
    
    ticket: 7613 (new)
    version_fixed: 1.9.5
    status: resolved

 src/aclocal.m4 |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/aclocal.m4 b/src/aclocal.m4
index 408035a..c32e101 100644
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -1076,6 +1076,9 @@ AC_REQUIRE([AC_PROG_ARCHIVE])dnl
 AC_REQUIRE([AC_PROG_ARCHIVE_ADD])dnl
 AC_REQUIRE([AC_PROG_INSTALL])dnl
 AC_CHECK_PROG(AR, ar, ar, false)
+if test "$AR" = "false"; then
+  AC_MSG_ERROR([ar not found in PATH])
+fi
 AC_CHECK_PROG(PERL, perl, perl, false)
 if test "$ac_cv_prog_PERL" = "false"; then
   AC_MSG_ERROR(Perl is now required for Kerberos builds.)