* aclocal.m4 (KRB5_NEED_PROTO): Determines if the OS provides a

	prototype for a function - and if not, allows us to define it.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@13324 dc483132-0cff-0310-8789-dd5450dbe970

diff --git a/src/ChangeLog b/src/ChangeLog
index 14cd7f7ebd91540b10f5caa6380fb5069f7a9b25..0325cd67900999c9aaa90e63765f13375636af9a 100644 (file)
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2001-06-11  Ezra Peisach  <epeisach@mit.edu>
+
+       * aclocal.m4 (KRB5_NEED_PROTO): Determines if the OS provides a
+       prototype for a function - and if not, allows us to define it.
+
 2001-06-08  Ezra Peisach  <epeisach@mit.edu>
 
        * krb5-config.in (CC_LINK): Use ' vs " to prevent bash expansion of

diff --git a/src/aclocal.m4 b/src/aclocal.m4
index 585e58d318bc2a452c21f8086ba725283373f17c..95a08a5d25ce8b7fdd2519af73dbe66b660e297a 100644 (file)
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -1244,3 +1244,26 @@ dnl AC_MSG_RESULT($enable_dns_for_kdc)
 dnl AC_MSG_CHECKING(if DNS should be used to find realm name by default)
 dnl AC_MSG_RESULT($enable_dns_for_realm)
 ])
+dnl
+dnl
+dnl Check if we need the prototype for a function - we give it a bogus 
+dnl prototype and if it complains - then a valid prototype exists on the 
+dnl system.
+dnl
+dnl KRB5_NEED_PROTO(includes, function)
+dnl
+AC_DEFUN([KRB5_NEED_PROTO], [
+if test "x$ac_cv_func_$2" = xyes; then
+AC_CACHE_CHECK([if $2 needs a prototype provided], krb5_cv_func_$2_noproto,
+AC_TRY_COMPILE([$1],
+[struct k5foo {int foo; } xx;
+extern int $2 (struct k5foo*);
+$2(&xx);
+],
+krb5_cv_func_$2_noproto=yes,krb5_cv_func_$2_noproto=no))
+if test $krb5_cv_func_$2_noproto = yes; then
+       AC_DEFINE([NEED_]translit($2, [a-z], [A-Z])[_PROTO], 1, dnl
+[define if the system header files are missing prototype for $2()])
+fi
+fi
+])