krb5 commit: Try to find <target>-ar when cross compiling

[Greg Hudson]

https://github.com/krb5/krb5/commit/52f99333f134bc6b1d97521cfe6a96b54ea72076
commit 52f99333f134bc6b1d97521cfe6a96b54ea72076
Author: Nikhil Benesch <nikhil.benesch at gmail.com>
Date:   Sat Jun 13 19:54:34 2020 -0400

    Try to find <target>-ar when cross compiling
    
    Teach the configure script to look for an ar tool prefixed with the
    target triple (i.e., `<target>-ar`) when cross compiling. This matches
    the behavior for tools that have built-in autoconf macros, like ranlib.
    (For some reason there is no AC_PROG_AR macro.)
    
    Also, remove the AC_PROG_ARCHIVE and AC_PROG_ARCHIVE_ADD macros, which
    have been dead code since 780b34cd.
    
    With this change, cross compiling libkrb5 works a bit better out of the
    box.
    
    ticket: 8915 (new)

 src/aclocal.m4 |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/src/aclocal.m4 b/src/aclocal.m4
index 2394f7e..54005fa 100644
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -280,8 +280,6 @@ if test $krb5_cv_func_sigprocmask_use = yes; then
 fi
 ])dnl
 dnl
-AC_DEFUN(AC_PROG_ARCHIVE, [AC_CHECK_PROG(ARCHIVE, ar, ar cqv, false)])dnl
-AC_DEFUN(AC_PROG_ARCHIVE_ADD, [AC_CHECK_PROG(ARADD, ar, ar cruv, false)])dnl
 dnl
 dnl check for <dirent.h> -- CHECK_DIRENT
 dnl (may need to be more complex later)
@@ -1035,10 +1033,8 @@ AC_DEFUN(KRB5_BUILD_LIBRARY,
 [AC_REQUIRE([KRB5_LIB_AUX])dnl
 AC_REQUIRE([AC_PROG_LN_S])dnl
 AC_REQUIRE([AC_PROG_RANLIB])dnl
-AC_REQUIRE([AC_PROG_ARCHIVE])dnl
-AC_REQUIRE([AC_PROG_ARCHIVE_ADD])dnl
 AC_REQUIRE([AC_PROG_INSTALL])dnl
-AC_CHECK_PROG(AR, ar, ar, false)
+AC_CHECK_TOOL(AR, ar, false)
 if test "$AR" = "false"; then
   AC_MSG_ERROR([ar not found in PATH])
 fi