new package: gnunet

Requested in https://github.com/termux/termux-packages/issues/4707.

packages/gnunet/build.sh

@@ -0,0 +1,32 @@
+TERMUX_PKG_HOMEPAGE=http://gnunet.org
+TERMUX_PKG_DESCRIPTION="A framework for secure peer-to-peer networking"
+TERMUX_PKG_LICENSE="GPL-2.0"
+TERMUX_PKG_VERSION=0.12.1
+TERMUX_PKG_DEPENDS="gnurl, libgcrypt, libgmp, libidn, libjansson, libltdl, libmicrohttpd, libsqlite, libunistring"
+TERMUX_PKG_BUILD_IN_SRC=true
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="ac_cv_have_decl_struct_in6_ifreq=yes"
+
+termux_step_extract_package() {
+	local CHECKED_OUT_FOLDER=$TERMUX_PKG_CACHEDIR/checkout-$TERMUX_PKG_VERSION
+	if [ ! -d $CHECKED_OUT_FOLDER ]; then
+		local TMP_CHECKOUT=$TERMUX_PKG_TMPDIR/tmp-checkout
+		rm -Rf $TMP_CHECKOUT
+		mkdir -p $TMP_CHECKOUT
+
+		git clone --depth 1 \
+			--branch v$TERMUX_PKG_VERSION \
+			https://gnunet.org/git/gnunet.git \
+			$TMP_CHECKOUT
+		cd $TMP_CHECKOUT
+		git submodule update --init # --depth 1
+		mv $TMP_CHECKOUT $CHECKED_OUT_FOLDER
+	fi
+
+	mkdir $TERMUX_PKG_SRCDIR
+	cd $TERMUX_PKG_SRCDIR
+	cp -Rf $CHECKED_OUT_FOLDER/* .
+}
+
+termux_step_pre_configure() {
+	./bootstrap
+}

packages/gnunet/no-in6_ifreq-redef.patch

@@ -0,0 +1,26 @@
+diff --git a/src/exit/gnunet-helper-exit.c b/src/exit/gnunet-helper-exit.c
+index d460326..03beecc 100644
+--- a/src/exit/gnunet-helper-exit.c
++++ b/src/exit/gnunet-helper-exit.c
+@@ -85,7 +85,7 @@ static const char *sbin_sysctl;
+ static const char *sbin_iptables;
+ 
+ 
+-#if ! defined(_LINUX_IN6_H) && defined(__linux__)
++#if ! defined(_LINUX_IN6_H) && !defined(__ANDROID__)
+ /**
+  * This is in linux/include/net/ipv6.h, but not always exported.
+  */
+diff --git a/src/vpn/gnunet-helper-vpn.c b/src/vpn/gnunet-helper-vpn.c
+index 4e35fa2..34eb018 100644
+--- a/src/vpn/gnunet-helper-vpn.c
++++ b/src/vpn/gnunet-helper-vpn.c
+@@ -59,7 +59,7 @@
+  */
+ #define MAX_SIZE 65536
+ 
+-#ifndef _LINUX_IN6_H
++#if !defined(_LINUX_IN6_H) && !defined(__ANDROID__)
+ /**
+  * This is in linux/include/net/ipv6.h, but not always exported...
+  */

packages/gnunet/no-librt.patch

@@ -0,0 +1,13 @@
+diff --git a/src/cadet/Makefile.am b/src/cadet/Makefile.am
+index d8d81bf..cfc182b 100644
+--- a/src/cadet/Makefile.am
++++ b/src/cadet/Makefile.am
+@@ -72,7 +72,7 @@ gnunet_service_cadet_LDADD = \
+   $(top_builddir)/src/hello/libgnunethello.la \
+   $(top_builddir)/src/block/libgnunetblock.la
+ if LINUX
+-  gnunet_service_cadet_LDFLAGS = -lrt \
++  gnunet_service_cadet_LDFLAGS = \
+     $(GN_LIBINTL)
+ endif
+ 

packages/gnurl/build.sh

@@ -0,0 +1,39 @@
+TERMUX_PKG_HOMEPAGE=https://gnunet.org/gnurl
+TERMUX_PKG_DESCRIPTION="Fork of libcurl, which is mostly for GNUnet"
+TERMUX_PKG_LICENSE="MIT"
+TERMUX_PKG_VERSION=7.67.0
+TERMUX_PKG_SRCURL=https://ftp.gnu.org/gnu/gnunet/gnurl-$TERMUX_PKG_VERSION.tar.Z
+TERMUX_PKG_SHA256=e0982d3226895a2d46a01e92ced1f32ab12e92540ba7ef2edbf28b7cadf8526b
+TERMUX_PKG_DEPENDS="libgnutls, libnghttp2"
+
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
+--disable-dict \
+--disable-file \
+--disable-ftp \
+--disable-gopher \
+--disable-imap \
+--disable-ldap \
+--disable-ldaps \
+--disable-ntlm-wb \
+--disable-pop3 \
+--disable-rtsp \
+--disable-smb \
+--disable-smtp \
+--disable-telnet \
+--disable-tftp \
+--enable-ipv6 \
+--enable-manual \
+--enable-versioned-symbols \
+--enable-threaded-resolver \
+--without-gssapi \
+--with-gnutls \
+--without-libidn \
+--without-libpsl \
+--without-librtmp \
+--without-ssl \
+--disable-ftp \
+--disable-file \
+--with-random=/dev/urandom \
+--with-ca-bundle=$TERMUX_PREFIX/etc/tls/cert.pem
+--with-ca-path=$TERMUX_PREFIX/etc/tls/certs
+"