Merge #16110: depends: Add Android NDK support

f9af3ced1c69d65c5c530ec5526f5eefaf786126 Android: add all arch support (Block Mechanic)
d419ca7e32bfc71e8dd1f1b91870463eacd6ad8e depends: export dynamic JNI symbols from static qtforandroid.a (Igor Cota)
ed30684d03d3a1d5496e69c488d848fe92ae6fb4 Qt: patch androidjnimain.cpp to make sure JNI is initialised when statically compiled (Igor Cota)
e4c319e8a1c6e40a953036b942bd5d732b0bbf69 builds: remove superfluous config_opts_aarch64_android (Igor Cota)
24ffef0c271739a2ca75feecb816f3218c1850bf Patch libevent when building for Android (fix arc4random_addrandom) (Igor Cota)
f1e40b3e7114b18bc03f45c3a97f9f673543ddef Update bitcoin_qt.m4 (BlockMechanic)
b4057d82618a21720f39f448b689cebf475cc2dc Define TARGET_OS when host is android (Igor Cota)
80b475f159525737e242161397f35d0729449545 Fix Android zlib cross compilation issue (https://stackoverflow.com/questions/21396988/zlib-build-not-configuring-properly-with-cross-compiler-ignores-ar) (Igor Cota)
45f82190150b3feef333724ea7395ba080e700b1 Add full Android build example command and instructions on getting SDK/NDK (Igor Cota)
b68f2a68c211aa2264e9ca824d10a90f4a5a5af4 Add config opts and patch for aarch64_android build of Qt (Igor Cota)
9c4cb0166e801471f8cb3d82656c86bacf051db6 Add ranlib to android.mk hosts file (fix OSX Android NDK build) (Igor Cota)
c2a749c9c16697e744ecfb283fdf4095d0278066 Add example Android host-platform-triplet and options (Igor Cota)
0b0cff3c61610fb56f8c5c9451ace01598117a8d Add support for building Android dependencies (Igor Cota)

Pull request description:

  This allows one to build the dependencies with the Android SDK and goes towards fixing #11844. It has been tested to work with:
  `make HOST=aarch64-linux-android ANDROID_API_LEVEL=28 ANDROID_TOOLCHAIN_BIN=/home/user/Android/Sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin NO_QT=1 NO_WALLET=1`

ACKs for top commit:
  Sjors:
    ACK f9af3ce. I'm OK with merging and then improving later.

Tree-SHA512: cb805115ebe5c9e33db2bf3eab8628808fe3f50052053d8877d8b8e4406d6fea1ed9e5c4dff85d777fb99c81be6ffb9d95a0e6d32344e728e5e0da6c653e2ce7

8 files changed, 48 insertions, 4 deletions

diff --git a/depends/packages/boost.mk b/depends/packages/boost.mk
index 766b8d224e..d360bb5ba6 100644
--- a/depends/packages/boost.mk
+++ b/depends/packages/boost.mk
@@ -15,12 +15,17 @@ $(package)_config_opts_mingw32=binary-format=pe target-os=windows threadapi=win3
 $(package)_config_opts_x86_64_mingw32=address-model=64
 $(package)_config_opts_i686_mingw32=address-model=32
 $(package)_config_opts_i686_linux=address-model=32 architecture=x86
+$(package)_config_opts_i686_android=address-model=32
+$(package)_config_opts_aarch64_android=address-model=64
+$(package)_config_opts_x86_64_android=address-model=64
+$(package)_config_opts_armv7a_android=address-model=32
 $(package)_toolset_$(host_os)=gcc
 $(package)_archiver_$(host_os)=$($(package)_ar)
 $(package)_toolset_darwin=clang-darwin
 $(package)_config_libraries=chrono,filesystem,system,thread,test
 $(package)_cxxflags=-std=c++11 -fvisibility=hidden
 $(package)_cxxflags_linux=-fPIC
+$(package)_cxxflags_android=-fPIC
 endef
 
 define $(package)_preprocess_cmds
diff --git a/depends/packages/libevent.mk b/depends/packages/libevent.mk
index 300c806a8d..b4333abaf0 100644
--- a/depends/packages/libevent.mk
+++ b/depends/packages/libevent.mk
@@ -3,16 +3,24 @@ $(package)_version=2.1.8-stable
 $(package)_download_path=https://github.com/libevent/libevent/archive/
 $(package)_file_name=release-$($(package)_version).tar.gz
 $(package)_sha256_hash=316ddb401745ac5d222d7c529ef1eada12f58f6376a66c1118eee803cb70f83d
+$(package)_patches=fix_android_arc4random_addrandom.patch
 
-define $(package)_preprocess_cmds
-  ./autogen.sh
-endef
+ifneq (,$(findstring android,$(host)))
+  define $(package)_preprocess_cmds
+    ./autogen.sh && patch -p1 < $($(package)_patch_dir)/fix_android_arc4random_addrandom.patch
+  endef
+else
+  define $(package)_preprocess_cmds
+    ./autogen.sh
+  endef
+endif
 
 define $(package)_set_vars
   $(package)_config_opts=--disable-shared --disable-openssl --disable-libevent-regress --disable-samples
   $(package)_config_opts += --disable-dependency-tracking --enable-option-checking
   $(package)_config_opts_release=--disable-debug-mode
   $(package)_config_opts_linux=--with-pic
+  $(package)_config_opts_android=--with-pic
 endef
 
 define $(package)_config_cmds
diff --git a/depends/packages/openssl.mk b/depends/packages/openssl.mk
index 3498a3f6ee..e3b3647dd9 100644
--- a/depends/packages/openssl.mk
+++ b/depends/packages/openssl.mk
@@ -58,6 +58,11 @@ $(package)_config_opts_riscv64_linux=linux-generic64
 $(package)_config_opts_x86_64_darwin=darwin64-x86_64-cc
 $(package)_config_opts_x86_64_mingw32=mingw64
 $(package)_config_opts_i686_mingw32=mingw
+$(package)_config_opts_android=-fPIC
+$(package)_config_opts_aarch64_android=linux-generic64
+$(package)_config_opts_x86_64_android=linux-generic64
+$(package)_config_opts_armv7a_android=linux-generic32
+$(package)_config_opts_i686_android=linux-generic32
 endef
 
 define $(package)_preprocess_cmds
diff --git a/depends/packages/packages.mk b/depends/packages/packages.mk
index 35f8b829db..09734c7e6f 100644
--- a/depends/packages/packages.mk
+++ b/depends/packages/packages.mk
@@ -3,6 +3,7 @@ packages:=boost openssl libevent
 qt_packages = qrencode zlib
 
 qt_linux_packages:=qt expat libxcb xcb_proto libXau xproto freetype fontconfig
+qt_android_packages=qt
 
 rapidcheck_packages = rapidcheck
 
diff --git a/depends/packages/qrencode.mk b/depends/packages/qrencode.mk
index 21570726ff..d1687883bc 100644
--- a/depends/packages/qrencode.mk
+++ b/depends/packages/qrencode.mk
@@ -9,6 +9,7 @@ $(package)_config_opts=--disable-shared --without-tools --without-tests --disabl
 $(package)_config_opts += --disable-gprof --disable-gcov --disable-mudflap
 $(package)_config_opts += --disable-dependency-tracking --enable-option-checking
 $(package)_config_opts_linux=--with-pic
+$(package)_config_opts_android=--with-pic
 endef
 
 define $(package)_preprocess_cmds
diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
index 0685eb2da2..a0f7cda2c0 100644
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -8,7 +8,7 @@ $(package)_dependencies=zlib
 $(package)_linux_dependencies=freetype fontconfig libxcb
 $(package)_build_subdir=qtbase
 $(package)_qt_libs=corelib network widgets gui plugins testlib
-$(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch fix_rcc_determinism.patch fix_riscv64_arch.patch xkb-default.patch no-xlib.patch
+$(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch fix_rcc_determinism.patch fix_riscv64_arch.patch xkb-default.patch no-xlib.patch fix_android_qmake_conf.patch fix_android_jni_static.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=fb5a47799754af73d3bf501fe513342cfe2fc37f64e80df5533f6110e804220c
@@ -128,6 +128,26 @@ $(package)_config_opts_x86_64_linux = -xplatform linux-g++-64
 $(package)_config_opts_aarch64_linux = -xplatform linux-aarch64-gnu-g++
 $(package)_config_opts_riscv64_linux = -platform linux-g++ -xplatform bitcoin-linux-g++
 $(package)_config_opts_mingw32  = -no-opengl -xplatform win32-g++ -device-option CROSS_COMPILE="$(host)-"
+
+$(package)_config_opts_android = -xplatform android-clang
+$(package)_config_opts_android += -android-sdk $(ANDROID_SDK)
+$(package)_config_opts_android += -android-ndk $(ANDROID_NDK)
+$(package)_config_opts_android += -android-ndk-platform android-$(ANDROID_API_LEVEL)
+$(package)_config_opts_android += -device-option CROSS_COMPILE="$(host)-"
+$(package)_config_opts_android += -egl
+$(package)_config_opts_android += -qpa xcb
+$(package)_config_opts_android += -no-eglfs
+$(package)_config_opts_android += -opengl es2
+$(package)_config_opts_android += -qt-freetype
+$(package)_config_opts_android += -no-fontconfig
+$(package)_config_opts_android += -L $(host_prefix)/lib
+$(package)_config_opts_android += -I $(host_prefix)/include
+
+$(package)_config_opts_aarch64_android += -android-arch arm64-v8a
+$(package)_config_opts_armv7a_android += -android-arch armeabi-v7a
+$(package)_config_opts_x86_64_android += -android-arch x86_64
+$(package)_config_opts_i686_android += -android-arch i686
+
 $(package)_build_env  = QT_RCC_TEST=1
 $(package)_build_env += QT_RCC_SOURCE_DATE_OVERRIDE=1
 endef
@@ -170,6 +190,8 @@ define $(package)_preprocess_cmds
   patch -p1 -i $($(package)_patch_dir)/fix_no_printer.patch &&\
   patch -p1 -i $($(package)_patch_dir)/fix_rcc_determinism.patch &&\
   patch -p1 -i $($(package)_patch_dir)/xkb-default.patch &&\
+  patch -p1 -i $($(package)_patch_dir)/fix_android_qmake_conf.patch &&\
+  patch -p1 -i $($(package)_patch_dir)/fix_android_jni_static.patch &&\
   echo "!host_build: QMAKE_CFLAGS     += $($(package)_cflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_CXXFLAGS   += $($(package)_cxxflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_LFLAGS     += $($(package)_ldflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
diff --git a/depends/packages/zeromq.mk b/depends/packages/zeromq.mk
index ce85c437bb..6f35ede248 100644
--- a/depends/packages/zeromq.mk
+++ b/depends/packages/zeromq.mk
@@ -11,6 +11,7 @@ define $(package)_set_vars
   $(package)_config_opts += --disable-libunwind --disable-radix-tree --without-gcov --disable-dependency-tracking
   $(package)_config_opts += --disable-Werror --disable-drafts --enable-option-checking
   $(package)_config_opts_linux=--with-pic
+  $(package)_config_opts_android=--with-pic
   $(package)_cxxflags=-std=c++11
 endef
 
diff --git a/depends/packages/zlib.mk b/depends/packages/zlib.mk
index 168f85e65e..acb02020a8 100644
--- a/depends/packages/zlib.mk
+++ b/depends/packages/zlib.mk
@@ -11,6 +11,7 @@ $(package)_config_opts+=RANLIB="$($(package)_ranlib)"
 $(package)_config_opts+=AR="$($(package)_ar)"
 $(package)_config_opts_darwin+=AR="$($(package)_libtool)"
 $(package)_config_opts_darwin+=ARFLAGS="-o"
+$(package)_config_opts_android+=CHOST=$(host)
 endef
 
 # zlib has its own custom configure script that takes in options like CC,