From 9175d2048382c617a639fd3d437a9e06baa66d0f Mon Sep 17 00:00:00 2001
From: Ivo Timmermans <ivo@lychnis.net>
Date: Wed, 29 Nov 2000 01:37:50 +0000
Subject: [PATCH] Added a check for a scanf that knows about %as.

---
 acconfig.h     |  3 +++
 configure.in   | 10 +++++-----
 m4/gnuscanf.m4 | 25 +++++++++++++++++++++++++
 system.h       |  3 +++
 4 files changed, 36 insertions(+), 5 deletions(-)
 create mode 100644 m4/gnuscanf.m4

diff --git a/acconfig.h b/acconfig.h
index 7bb8efe1..031a337b 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -64,3 +64,6 @@
 
 /* Define to 1 if checkpoint tracing is enabled */
 #undef ENABLE_TRACING
+
+/* Define to 1 if scanf and friends understand %as */
+#undef HAVE_SCANF_AS
diff --git a/configure.in b/configure.in
index ed5f4469..70b767f8 100644
--- a/configure.in
+++ b/configure.in
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 
-dnl $Id: configure.in,v 1.13.2.27 2000/11/29 00:33:15 zarq Exp $
+dnl $Id: configure.in,v 1.13.2.28 2000/11/29 01:37:50 zarq Exp $
 
 AC_INIT(src/tincd.c)
 AM_INIT_AUTOMAKE(tinc, 1.0pre4-cvs)
@@ -71,9 +71,6 @@ jm_FUNC_REALLOC
 AM_GNU_GETTEXT
 
 
-dnl Crypto stuff
-tinc_OPENSSL
-
 dnl Support for SunOS
 
 AC_CHECK_FUNC(socket, [], [
@@ -84,8 +81,11 @@ AC_CHECK_FUNC(gethostbyname, [], [
 ])
 
 
-dnl Check for TUN/TAP support in the kernel
+dnl These are defined in files in m4/
 tinc_TUNTAP
+tinc_OPENSSL
+tinc_SCANF_AS
+
 
 dnl Check if checkpoint tracing has to be enabled
 AC_ARG_ENABLE(tracing,
diff --git a/m4/gnuscanf.m4 b/m4/gnuscanf.m4
new file mode 100644
index 00000000..fd8de464
--- /dev/null
+++ b/m4/gnuscanf.m4
@@ -0,0 +1,25 @@
+dnl Check for a scanf that understands about %as as format specifier
+
+AC_DEFUN(tinc_SCANF_AS,
+[
+  AC_CACHE_CHECK([for a scanf that groks %as], tinc_cv_scanf_as,
+  [
+    AC_TRY_RUN([
+/* Very naive program which will probably give a segmentation
+   fault if the sscanf doesn't work as expected. */
+#include <stdio.h>
+int main() {
+  char*s = NULL;
+  sscanf("string\n", "%as\n", &s);
+  if(s == NULL)
+    return 1;
+  return strcmp("string", s);
+}
+    ], [tinc_cv_scanf_as="yes"], [tinc_cv_scanf_as="no"])
+  ])
+
+if test "$tinc_cv_scanf_as" = "yes" ; then
+  AC_DEFINE(HAVE_SCANF_AS)
+  AC_SUBST(HAVE_SCANF_AS)
+fi
+])
diff --git a/system.h b/system.h
index 5691d8bc..51adca0b 100644
--- a/system.h
+++ b/system.h
@@ -45,5 +45,8 @@
 # define strsignal(p) ""
 #endif
 
+/* Other functions */
+#include <dropin.h>
+
 #endif /* __TINC_SYSTEM_H__ */
 
-- 
2.20.1