From 17b940c610b3d0d2f5728cc43c4441a2ea63e4a8 Mon Sep 17 00:00:00 2001
From: Romuald Conty <romuald@libnfc.org>
Date: Mon, 4 Oct 2010 10:24:45 +0000
Subject: [PATCH] Finalize pn53x-tamashell integration (add readline m4, fiw
 minor warnings, adjust Makefile.am)

---
 configure.ac               |  1 +
 examples/Makefile.am       |  4 +--
 examples/pn53x-diagnose.c  |  1 -
 examples/pn53x-tamashell.c |  7 +++++
 m4/readline.m4             | 52 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100644 m4/readline.m4

diff --git a/configure.ac b/configure.ac
index 07bd952..87fcc52 100644
--- a/configure.ac
+++ b/configure.ac
@@ -125,6 +125,7 @@ if test x$ac_cv_with_cutter = xyes -a x$ac_cv_use_cutter = xno; then
 fi
 AM_CONDITIONAL([WITH_CUTTER], [test "$ac_cv_use_cutter" != "no"])
 
+AC_CHECK_READLINE
 
 # Defines and C flags
 CFLAGS="$CFLAGS -std=c99"
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 35c4e5a..830e456 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -66,9 +66,7 @@ pn53x_diagnose_LDADD = $(top_builddir)/libnfc/libnfc.la \
 pn53x_tamashell_SOURCES = pn53x-tamashell.c
 pn53x_tamashell_LDADD = $(top_builddir)/libnfc/libnfc.la \
 		    libnfcutils.la
-# Should be guarded by test on availability of readline
-#pn53x_tamashell_CFLAGS = -DHAVE_READLINE
-#pn53x_tamashell_LDFLAGS = -lreadline
+pn53x_tamashell_LDFLAGS = @READLINE_LIBS@
 
 nfc_sam_SOURCES = nfc-sam.c
 nfc_sam_LDADD = $(top_builddir)/libnfc/libnfc.la \
diff --git a/examples/pn53x-diagnose.c b/examples/pn53x-diagnose.c
index 78f9583..c26ed04 100644
--- a/examples/pn53x-diagnose.c
+++ b/examples/pn53x-diagnose.c
@@ -29,7 +29,6 @@
 #include <nfc/nfc-messages.h>
 
 #include "nfc-utils.h"
-// FIXME: Delete me
 #include "chips/pn53x.h"
 
 #define MAX_DEVICE_COUNT 16
diff --git a/examples/pn53x-tamashell.c b/examples/pn53x-tamashell.c
index 4c91dd2..f2d08a7 100644
--- a/examples/pn53x-tamashell.c
+++ b/examples/pn53x-tamashell.c
@@ -17,23 +17,30 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 */
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif // HAVE_CONFIG_H
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
 #include <unistd.h>
+
 #if defined(HAVE_READLINE)
 #  include <readline/readline.h>
 #  include <readline/history.h>
 #else
    extern FILE* stdin;
 #endif //HAVE_READLINE
+
 #include <nfc/nfc.h>
 #include <nfc/nfc-messages.h>
 
 #include "nfc-utils.h"
 
+#include "chips/pn53x.h"
+
 #define MAX_FRAME_LEN 264
 
 int main(int argc, const char* argv[])
diff --git a/m4/readline.m4 b/m4/readline.m4
new file mode 100644
index 0000000..62f47ae
--- /dev/null
+++ b/m4/readline.m4
@@ -0,0 +1,52 @@
+dnl Based on wojtekka's m4 from http://wloc.wsinf.edu.pl/~kklos/ekg-20080219/m4/readline.m4
+
+AC_DEFUN(AC_CHECK_READLINE,[
+  AC_SUBST(READLINE_LIBS)
+  AC_SUBST(READLINE_INCLUDES)
+
+  AC_ARG_WITH(readline,
+    [[  --with-readline[=dir]   Compile with readline/locate base dir]],
+    if test "x$withval" = "xno" ; then
+      without_readline=yes
+    elif test "x$withval" != "xyes" ; then
+      with_arg="$withval/include:-L$withval/lib $withval/include/readline:-L$withval/lib"
+    fi)
+
+  AC_MSG_CHECKING(for readline.h)
+
+  if test "x$without_readline" != "xyes"; then
+    for i in $with_arg \
+	     /usr/include: \
+	     /usr/local/include:-L/usr/local/lib \
+	     /usr/pkg/include:-L/usr/pkg/lib; do
+    
+      incl=`echo "$i" | sed 's/:.*//'`
+      lib=`echo "$i" | sed 's/.*://'`
+
+      if test -f $incl/readline/readline.h ; then
+        AC_MSG_RESULT($incl/readline/readline.h)
+        READLINE_LIBS="$lib -lreadline"
+	if test "$incl" != "/usr/include"; then
+	  READLINE_INCLUDES="-I$incl/readline -I$incl"
+	else
+	  READLINE_INCLUDES="-I$incl/readline"
+	fi
+        AC_DEFINE(HAVE_READLINE, 1, [define if you have readline])
+        have_readline=yes
+        break
+      elif test -f $incl/readline.h -a "x$incl" != "x/usr/include"; then
+        AC_MSG_RESULT($incl/readline.h)
+        READLINE_LIBS="$lib -lreadline"
+        READLINE_INCLUDES="-I$incl"
+        AC_DEFINE(HAVE_READLINE, 1, [define if you have readline])
+        have_readline=yes
+        break
+      fi
+    done
+  fi
+
+  if test "x$have_readline" != "xyes"; then
+    AC_MSG_RESULT(not found)
+  fi
+])
+