lightning: new package

GNU lightning is a library that generates assembly language code at
run-time.

https://www.gnu.org/software/lightning/

[Thomas:
 - Wrap list of architectures in Config.in
 - Introduce an explicit Config.in option for the disassembler
   support, since it needs both binutils and zlib, which may not be
   easy to guess.
 - Add hash file.
 - Bump to version 2.0.5.
 - Add patch to fix cross-compilation issues on ARM and x86 due to
   AC_RUN_IFELSE() tests.
 - Adjust license information: the library is actually under LGPLv3+,
   not GPLv3. There is a COPYING file with the text of the GPLv3 in
   the code base, but this license doesn't seem to be used in anything
   that is actually installed.
 - Add AUTORECONF = YES since we're now patching configure.ac.
 - Add missing dependency on zlib for the disassembler support.
 - Add a special LIBS=-lintl when enabling the disassembler support
   because binutils libraries use gettext functions, but they are not
   linked against libintl.]

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/lightning/Config.in

@@ -0,0 +1,26 @@
+config BR2_PACKAGE_LIGHTNING
+	bool "lightning"
+	depends on BR2_sparc || BR2_i386 || BR2_x86_64 || BR2_mips || \
+		BR2_mipsel || BR2_arm || BR2_powerpc
+	help
+	  GNU lightning is a library that generates
+	  assembly language code at run-time.
+
+	  https://www.gnu.org/software/lightning/
+
+if BR2_PACKAGE_LIGHTNING
+
+config BR2_PACKAGE_LIGHTNING_DISASSEMBLER
+	bool "enable disassembler"
+	select BR2_PACKAGE_BINUTILS
+	select BR2_PACKAGE_ZLIB
+	depends on !BR2_aarch64 && !BR2_nios2 # binutils
+	depends on BR2_USE_WCHAR # binutils
+	help
+	  Enable the GNU lightning disassembler.
+
+comment "lightning disassembler needs a toolchain w/ wchar"
+	depends on !BR2_aarch64 && !BR2_nios2
+	depends on !BR2_USE_WCHAR
+
+endif