package/python-argon2-cffi: use system libargon2

The python-argon2-cffi package can be used with the system libargon2,
we should use that instead of the embedded version.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/python-argon2-cffi/Config.in

@@ -1,8 +1,11 @@
 config BR2_PACKAGE_PYTHON_ARGON2_CFFI
 	bool "python-argon2-cffi"
+	depends on BR2_USE_MMU # libargon2
+	depends on !BR2_STATIC_LIBS # libargon2
 	select BR2_PACKAGE_PYTHON_CFFI # runtime
 	select BR2_PACKAGE_PYTHON_ENUM34 if BR2_PACKAGE_PYTHON # runtime
 	select BR2_PACKAGE_PYTHON_SIX # runtime
+	select BR2_PACKAGE_LIBARGON2
 	help
 	  The secure Argon2 password hashing algorithm.
 

package/python-argon2-cffi/python-argon2-cffi.mk

@@ -10,12 +10,13 @@ PYTHON_ARGON2_CFFI_SITE = https://files.pythonhosted.org/packages/74/fd/d78e003a
 PYTHON_ARGON2_CFFI_SETUP_TYPE = setuptools
 PYTHON_ARGON2_CFFI_LICENSE = MIT
 PYTHON_ARGON2_CFFI_LICENSE_FILES = LICENSE
-PYTHON_ARGON2_CFFI_DEPENDENCIES = host-python-cffi
+PYTHON_ARGON2_CFFI_DEPENDENCIES = host-python-cffi libargon2
+PYTHON_ARGON2_CFFI_ENV = ARGON2_CFFI_USE_SYSTEM=1
 
 ifeq ($(BR2_X86_CPU_HAS_SSE2),y)
-PYTHON_ARGON2_CFFI_ENV = ARGON2_CFFI_USE_SSE2=1
+PYTHON_ARGON2_CFFI_ENV += ARGON2_CFFI_USE_SSE2=1
 else
-PYTHON_ARGON2_CFFI_ENV = ARGON2_CFFI_USE_SSE2=0
+PYTHON_ARGON2_CFFI_ENV += ARGON2_CFFI_USE_SSE2=0
 endif
 
 $(eval $(python-package))