botan: needs std::future

Fixes:
 - http://autobuild.buildroot.org/results/d63f70340d1297ad96c20144e658f0e4587a90ca

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/botan/Config.in

@@ -11,6 +11,7 @@ config BR2_PACKAGE_BOTAN
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_PACKAGE_BOTAN_ARCH_SUPPORTS
+	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::future
 	help
 	  Botan is a crypto library for C++
 
@@ -20,3 +21,7 @@ comment "botan needs a toolchain w/ C++, threads, gcc >= 4.8"
 	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP \
 		|| !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
 	depends on BR2_PACKAGE_BOTAN_ARCH_SUPPORTS
+
+comment "botan needs a toolchain not affected by GCC bug 64735"
+	depends on BR2_PACKAGE_BOTAN_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HAS_GCC_BUG_64735