[Buildroot] [git commit branch/next] package/python-greenlet: add missing C++ dependency

[Thomas Petazzoni]

commit: https://git.buildroot.net/buildroot/commit/?id=3496f300a8ca2bb8b337db5d43be5b3293a4e9e4
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/next

Fixes:
 - http://autobuild.buildroot.net/results/529/5291fe0fac1d5c7b6587e4a566991a764a2632fb

Signed-off-by: James Hilliard <james.hilliard1 at gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists at googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
 package/python-greenlet/Config.in | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/package/python-greenlet/Config.in b/package/python-greenlet/Config.in
index 9f66ebe119..ae092e3ffe 100644
--- a/package/python-greenlet/Config.in
+++ b/package/python-greenlet/Config.in
@@ -12,7 +12,12 @@ config BR2_PACKAGE_PYTHON_GREENLET_ARCH_SUPPORTS
 config BR2_PACKAGE_PYTHON_GREENLET
 	bool "python-greenlet"
 	depends on BR2_PACKAGE_PYTHON_GREENLET_ARCH_SUPPORTS
+	depends on BR2_INSTALL_LIBSTDCPP
 	help
 	  Lightweight in-process concurrent programming.
 
 	  https://github.com/python-greenlet/greenlet
+
+comment "python-greenlet needs a toolchain w/ C++"
+	depends on BR2_PACKAGE_PYTHON_GREENLET_ARCH_SUPPORTS
+	depends on !BR2_INSTALL_LIBSTDCPP