Re: Optionally make compat socklen_t default to int in bootstrap?

[Martin Husemann <martin%duskware.de@localhost>]

Maybe something like this?

I didn't get the result define quoting/value correct, but otherwise
it seems to do what I intended.

Martin

Index: configure.ac
===================================================================
RCS file: /cvsroot/pkgsrc/pkgtools/libnbcompat/files/configure.ac,v
retrieving revision 1.86
diff -u -r1.86 configure.ac
--- configure.ac	1 Sep 2015 23:17:51 -0000	1.86
+++ configure.ac	1 May 2016 10:41:13 -0000
@@ -345,6 +345,44 @@
 	AC_LIBOBJ(getaddrinfo)
 fi
 
+dnl If we do not have socklen_t, figure out what to substitute for it
+old_CFLAGS="$CFLAGS"
+if test "x$ac_cv_type_socklen_t" = xno; then
+	AC_MSG_CHECKING(whether compiler understands -Wall -Werror)
+	CFLAGS="$CFLAGS -Wall -Werror"
+	AC_TRY_COMPILE([],[], [
+
+	AC_MSG_RESULT(yes)
+	AC_MSG_CHECKING(for type to use instead of socklen_t)
+	socklen_t_found="no"
+	socklen_surrogate=""
+	AC_DEFUN(AC_TRY_SOCKLEN, [
+		AC_TRY_COMPILE([#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#include <sys/socket.h>
+], [ 
+  $1 l;                       
+  getsockname(0, 0, &l);                
+], [ socklen_t_found=yes ], [ socklen_t_found=no ])
+		if test "x[$]socklen_t_found" = "xyes"; then
+			socklen_surrogate="$1"
+		fi
+	])
+	AC_TRY_SOCKLEN(int)
+	if test $socklen_t_found = "no"; then
+		AC_TRY_SOCKLEN(size_t)
+		if test $socklen_t_found = "no"; then
+			AC_TRY_SOCKLEN(unsigned int)
+		fi
+	fi
+	], [ AC_MSG_RESULT(no) ])
+fi
+AC_DEFINE(SOCKLEN_SURROGATE, socklen_surrogate,
+	[Type to use as surrogate for socklen_t])
+AC_MSG_RESULT($socklen_surrogate)
+CFLAGS="$old_CFLAGS"
+
 need_findenv=no
 AC_CHECK_FUNCS([getenv setenv unsetenv], [:], [need_findenv=yes])
 if test $need_findenv = yes; then