libsodium: include ed25519_core in minimal build

Functions from ed25519_core are needed for GNUnet to build.
Include them in the minimal build of libsodium so we don't need to
switch to the full build just for that.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

libs/libsodium/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libsodium
 PKG_VERSION:=1.0.18
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://download.libsodium.org/libsodium/releases \

libs/libsodium/patches/100-minimal-build-with-ed25519-core.patch

@@ -0,0 +1,36 @@
+--- a/src/libsodium/Makefile.am
++++ b/src/libsodium/Makefile.am
+@@ -12,6 +12,7 @@ libsodium_la_SOURCES = \
+ 	crypto_box/crypto_box_easy.c \
+ 	crypto_box/crypto_box_seal.c \
+ 	crypto_box/curve25519xsalsa20poly1305/box_curve25519xsalsa20poly1305.c \
++	crypto_core/ed25519/core_ed25519.c \
+ 	crypto_core/ed25519/ref10/ed25519_ref10.c \
+ 	crypto_core/hchacha20/core_hchacha20.c \
+ 	crypto_core/hsalsa20/ref2/core_hsalsa20_ref2.c \
+@@ -152,7 +153,6 @@ if !MINIMAL
+ libsodium_la_SOURCES += \
+ 	crypto_box/curve25519xchacha20poly1305/box_curve25519xchacha20poly1305.c \
+ 	crypto_box/curve25519xchacha20poly1305/box_seal_curve25519xchacha20poly1305.c \
+-	crypto_core/ed25519/core_ed25519.c \
+ 	crypto_core/ed25519/core_ristretto255.c \
+ 	crypto_pwhash/scryptsalsa208sha256/crypto_scrypt-common.c \
+ 	crypto_pwhash/scryptsalsa208sha256/crypto_scrypt.h \
+--- a/src/libsodium/include/sodium.h
++++ b/src/libsodium/include/sodium.h
+@@ -14,6 +14,7 @@
+ #include "sodium/crypto_auth_hmacsha512256.h"
+ #include "sodium/crypto_box.h"
+ #include "sodium/crypto_box_curve25519xsalsa20poly1305.h"
++#include "sodium/crypto_core_ed25519.h"
+ #include "sodium/crypto_core_hsalsa20.h"
+ #include "sodium/crypto_core_hchacha20.h"
+ #include "sodium/crypto_core_salsa20.h"
+@@ -56,7 +57,6 @@
+ 
+ #ifndef SODIUM_LIBRARY_MINIMAL
+ # include "sodium/crypto_box_curve25519xchacha20poly1305.h"
+-# include "sodium/crypto_core_ed25519.h"
+ # include "sodium/crypto_core_ristretto255.h"
+ # include "sodium/crypto_scalarmult_ristretto255.h"
+ # include "sodium/crypto_secretbox_xchacha20poly1305.h"