flex: bump version to 2.6.4

- 0001 patch removed. It doesn't apply on this version and is also not
  necessary since the AR binary is now handled correctly with AR = @AR@.
- 0002 patch removed. It's already included in this release:
  https://github.com/westes/flex/commit/a5cbe929ac3255d371e698f62dc256afe7006466
- The flex project has moved to GitHub, so modify the URLs in both
  flex.mk and Config.in files.
- The sed command over Makefile.in to prevent the flex binary to be
  built fails, so remove it. That logic has been moved to
  src/Makefile.in, and whenever we disable the flex binary to be built
  then the compilation fails when building the documentation because
  some bits require "../src/flex", which is the flex binary.
  We prevent building the flex binary and the documentation using a new
  patch.

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/flex/0001-flex-disable-flex-binary-and-documentation.patch

@@ -0,0 +1,35 @@
+flex: prevent flex binary to be built
+
+Since we prevent the flex binary to be built, we also need to prevent
+the documentation to be built, otherwise it will fail like this:
+
+Making all in doc
+make[2]: Entering directory '/br/output/build/flex-2.6.4/doc'
+make[2]: *** No rule to make target '../src/flex', needed by 'flex.1'.
+Stop.
+
+Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
+
+diff -rup a/Makefile.in b/Makefile.in
+--- a/Makefile.in	2017-05-06 15:49:09.000000000 +0100
++++ b/Makefile.in	2017-05-10 14:35:20.152794902 +0100
+@@ -450,7 +450,6 @@ EXTRA_DIST = \
+ 
+ SUBDIRS = \
+ 	src \
+-	doc \
+ 	examples \
+ 	po \
+ 	tests \
+diff -rup a/src/Makefile.in b/src/Makefile.in
+--- a/src/Makefile.in	2017-05-06 15:49:09.000000000 +0100
++++ b/src/Makefile.in	2017-05-10 14:35:01.918464036 +0100
+@@ -90,7 +90,7 @@ PRE_UNINSTALL = :
+ POST_UNINSTALL = :
+ build_triplet = @build@
+ host_triplet = @host@
+-bin_PROGRAMS = flex$(EXEEXT)
++bin_PROGRAMS =
+ @ENABLE_BOOTSTRAP_TRUE@noinst_PROGRAMS = stage1flex$(EXEEXT)
+ @CROSS_TRUE@am__append_1 = \
+ @CROSS_TRUE@		      ../lib/malloc.c \

package/flex/0001-prog-ar.patch

@@ -1,11 +0,0 @@
-diff -rup flex-2.5.33.orig/Makefile.in flex-2.5.33/Makefile.in
---- flex-2.5.33.orig/Makefile.in	2007-01-18 17:29:25.000000000 +0100
-+++ flex-2.5.33/Makefile.in	2007-01-18 18:28:22.000000000 +0100
-@@ -105,7 +105,6 @@ am__installdirs = "$(DESTDIR)$(libdir)"
- 	"$(DESTDIR)$(includedir)"
- libLIBRARIES_INSTALL = $(INSTALL_DATA)
- LIBRARIES = $(lib_LIBRARIES)
--AR = ar
- ARFLAGS = cru
- libfl_a_AR = $(AR) $(ARFLAGS)
- libfl_a_LIBADD =

package/flex/0002-fix-CVE-2016-6354.patch

@@ -1,25 +0,0 @@
-From a5cbe929ac3255d371e698f62dc256afe7006466 Mon Sep 17 00:00:00 2001
-From: Will Estes <westes575@gmail.com>
-Date: Sat, 27 Feb 2016 11:56:05 -0500
-Subject: [PATCH] Fixed incorrect integer type
-
-Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
----
-Status: upstream
-
- flex.skl | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/src/flex.skl b/src/flex.skl
-index 36a526a..64f853d 100644
---- a/flex.skl
-+++ b/flex.skl
-@@ -1703,7 +1703,7 @@ int yyFlexLexer::yy_get_next_buffer()
- 
- 	else
- 		{
--			yy_size_t num_to_read =
-+			int num_to_read =
- 			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
- 
- 		while ( num_to_read <= 0 )

package/flex/Config.in

@@ -5,4 +5,4 @@ config BR2_PACKAGE_FLEX
 	  A fast lexical analyser generator. A tool for generating
 	  programs that perform pattern-matching on text.
 
-	  http://flex.sourceforge.net/
+	  https://github.com/westes/flex/

package/flex/flex.hash

@@ -1,2 +1,2 @@
 # Locally computed:
-sha256  bf693433a3effe6b1f42e44abd787491e4e213984b1859545b92267a86088dd3  flex-2.5.37.tar.gz
+sha256 e87aae032bf07c26f85ac0ed3250998c37621d95f8bd748b31f15b33c45ee995  flex-2.6.4.tar.gz

package/flex/flex.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-FLEX_VERSION = 2.5.37
-FLEX_SITE = http://download.sourceforge.net/project/flex
+FLEX_VERSION = 2.6.4
+FLEX_SITE = https://github.com/westes/flex/files/981163
 FLEX_INSTALL_STAGING = YES
 FLEX_LICENSE = FLEX
 FLEX_LICENSE_FILES = COPYING
@@ -15,11 +15,6 @@ FLEX_CONF_ENV = ac_cv_path_M4=/usr/bin/m4
 # we don't have a host-gettext/libintl
 HOST_FLEX_DEPENDENCIES = host-m4
 
-define FLEX_DISABLE_PROGRAM
-	$(SED) 's/^bin_PROGRAMS.*//' $(@D)/Makefile.in
-endef
-FLEX_POST_PATCH_HOOKS += FLEX_DISABLE_PROGRAM
-
 # flex++ symlink is broken when flex binary is not installed
 define FLEX_REMOVE_BROKEN_SYMLINK
 	rm -f $(TARGET_DIR)/usr/bin/flex++