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Support building native libraries with Android NDK 18+ #1744

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3 changes: 2 additions & 1 deletion CHANGES.md
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ Next Release (5.20.0)

Features
--------
* [#1659](https://github.com/java-native-access/jna/issues/1659): Support building jnidispatch with Android NDK 18+ - [@BugsBeGone](https://github.com/BugsBeGone).

Bug Fixes
---------
Expand Down Expand Up @@ -1500,4 +1501,4 @@ Bug Fixes
* Ensure native libraries are only loaded once until released
* Properly handle NULL when the return value is a Structure
* Proper conversion to wchar_t on linux
* Copy full length of Java strings to C strings instead of stopping when a NUL character is encountered
* Copy full length of Java strings to C strings instead of stopping when a NUL character is encountered
78 changes: 60 additions & 18 deletions native/Makefile
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Expand Up @@ -121,41 +121,41 @@ ifeq ($(OS),android)
AARCH=$(ARCH)
ALIBDIR=/usr/lib
ifeq ($(ARCH),arm)
PREFIX=arm-linux-androideabi-
PREFIX=arm-linux-androideabi
COPT+= -mthumb-interwork -march=armv5te -mtune=xscale -msoft-float -fstack-protector
HOST=arm-linux-eabi
else
ifeq ($(ARCH),armv7)
PREFIX=arm-linux-androideabi-
COPT+= -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -Wl,--fix-cortex-a8
HOST=arm-linux-eabi
PREFIX=armv7a-linux-androideabi
COPT+= -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16
HOST=armv7a-linux-androideabi
AARCH=arm
else
ifeq ($(ARCH),aarch64)
PREFIX=aarch64-linux-android-
PREFIX=aarch64-linux-android
HOST=aarch64-linux-android
AARCH=arm64
ALIBDIR=/usr/lib64
else
ifeq ($(ARCH),x86)
PREFIX=i686-linux-android-
PREFIX=i686-linux-android
COPT+= -march=i686
HOST=i686-linux-android
else
ifeq ($(ARCH),x86-64)
PREFIX=x86_64-linux-android-
PREFIX=x86_64-linux-android
COPT+= -m64
HOST=x86_64-linux-android
AARCH=x86_64
ALIBDIR=/usr/lib64
else
ifeq ($(ARCH),mips)
PREFIX=mipsel-linux-android-
PREFIX=mipsel-linux-android
HOST=mipsel-linux-android
COPT+=
else
ifeq ($(ARCH),mips64)
PREFIX=mips64el-linux-android-
PREFIX=mips64el-linux-android
HOST=mips64el-linux-android
COPT+=
ALIBDIR=/usr/lib64
Expand All @@ -169,19 +169,61 @@ endif
endif
endif
NDK?=/Developer/Applications/android-ndk-r10e
NDK_PLATFORM?=$(NDK)/platforms/android-21
SYSROOT=$(NDK_PLATFORM)/arch-$(AARCH)
CC=$(PREFIX)gcc --sysroot $(SYSROOT)
CPP=$(PREFIX)cpp
NDK_PLATFORM?=21

# If using standalone toolchains, NDK_VER must be manually set to the major
# version, since there is no copy of source.properties and prior to r16,
# __NDK_MAJOR__ is not defined either.
ifndef NDK_VER
NDK_PROPS = $(NDK)/source.properties
ifneq (,$(wildcard $(NDK_PROPS)))
NDK_VER = $(shell sed -En 's/^Pkg.Revision[ \t]*=[ \t]*([0-9]+).*/\1/p' $(NDK_PROPS))
else
ERROR = $(error "Unknown NDK Pkg.Revision")
endif
endif

# Check NDK > 16
NDK_GT_16 = $(shell [ ${NDK_VER} -gt 16 ] && echo true)
ifeq ($(NDK_GT_16),true)
ifeq ($(ARCH),arm)
ERROR = $(error "Incompatible NDK, no longer supports armv5")
else
ifneq (,$(findstring mips,$(ARCH)))
ERROR = $(error "Incompatible NDK, no longer supports mips")
endif
endif
endif

# Check NDK < 18
NDK_LT_18 = $(shell [ ${NDK_VER} -lt 18 ] && echo true)
ifeq ($(NDK_LT_18),true) # Use gcc & binutils
ifeq ($(ARCH),armv7)
PREFIX = arm-linux-androideabi
COPT += -Wl,--fix-cortex-a8
HOST = arm-linux-eabi
endif
SYSROOT = $(NDK)/platforms/android-$(NDK_PLATFORM)/arch-$(AARCH)
CC = $(PREFIX)-gcc --sysroot $(SYSROOT)
CPP = $(PREFIX)-cpp
RANLIB = $(PREFIX)-ranlib
STRIP = $(PREFIX)-strip -x
CINCLUDES += -I"$(SYSROOT)/usr/include" # -I/usr/include
LIBS = -nostdlib -L"$(SYSROOT)$(ALIBDIR)/" -lgcc
LDFLAGS += -Wl,-z,common-page-size=16384
else # NDK >= 18, use clang & llvm
CC = clang --target=$(PREFIX)$(NDK_PLATFORM)
CPP = clang++ --target=$(PREFIX)$(NDK_PLATFORM)
RANLIB = llvm-ranlib
STRIP = llvm-strip -x
endif

LD=$(CC)
RANLIB=$(PREFIX)ranlib
STRIP=$(PREFIX)strip -x
CDEFINES=-DFFI_STATIC_BUILD -DNO_JAWT -DNO_WEAK_GLOBALS -DFFI_MMAP_EXEC_WRIT=1 -DFFI_MMAP_EXEC_SELINUX=0 -Dmalloc_getpagesize='getpagesize()'
COPT+=-fpic -ffunction-sections -funwind-tables -fno-short-enums
JAVA_INCLUDES=
CINCLUDES+=-I"$(NDK_PLATFORM)/arch-$(AARCH)/usr/include" # -I/usr/include
LIBS=-nostdlib -L"$(NDK_PLATFORM)/arch-$(AARCH)$(ALIBDIR)/" -lgcc -lc -ldl -lm
LDFLAGS+=-Wl,-shared,-Bsymbolic -Wl,--build-id=sha1 -Wl,-z,max-page-size=16384 -Wl,-z,common-page-size=16384
LIBS+=-lc -ldl -lm
LDFLAGS+=-Wl,-shared,-Bsymbolic,--build-id=sha1,-z,max-page-size=16384
FFI_ENV=CPP="$(CPP)" CC="$(CC)" CFLAGS="$(COPT) $(CDEBUG) $(CINCLUDES)" CPPFLAGS="$(CDEFINES) $(CINCLUDES)" LIBS="$(LIBS)" RANLIB="$(RANLIB)"
FFI_CONFIG=--enable-static --disable-shared --with-pic=yes --host=$(HOST)
endif
Expand Down
17 changes: 5 additions & 12 deletions www/AndroidDevelopmentEnvironment.md
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Expand Up @@ -2,8 +2,8 @@ Android Development Environment
===============================

* Add Android SDK/NDK tools into `PATH` (used by `native/Makefile`).
* Set environment variable `NDK_PLATFORM` (used by `native/Makefile`).
* Build using: `ant -Dos.prefix=android-arm dist`.
* Set environment variables `NDK` and `NDK_PLATFORM` (used by `native/Makefile`).
* Build using: `ant -Dos.prefix=android-armv7 dist`.
* Tests must be run on the target platform, not the build platform.
* Add `dist/jna.jar` and/or `dist/platform.jar` to your application, as needed.
* If you're using android-maven-plugin, `jna.jar` can be used as-is (native libraries will be automatically copied into your project).
Expand All @@ -15,18 +15,11 @@ Sample build
------------

```bash
export NDK_PLATFORM=/home/matthias/bin/android-ndk-r12b/platforms/android-21
export PATH=$NDK_PLATFORM/../../toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/:$PATH
export PATH=$NDK_PLATFORM/../../toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/:$PATH
export PATH=$NDK_PLATFORM/../../toolchains/mips64el-linux-android-4.9/prebuilt/linux-x86_64/bin/:$PATH
export PATH=$NDK_PLATFORM/../../toolchains/mipsel-linux-android-4.9/prebuilt/linux-x86_64/bin/:$PATH
export PATH=$NDK_PLATFORM/../../toolchains/x86-4.9/prebuilt/linux-x86_64/bin/:$PATH
export PATH=$NDK_PLATFORM/../../toolchains/x86_64-4.9/prebuilt/linux-x86_64/bin/:$PATH
export NDK=/home/matthias/Android/Sdk/ndk/30.0.16248370
export NDK_PLATFORM=21
export PATH=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/:$PATH
ant -Dos.prefix=android-aarch64
ant -Dos.prefix=android-armv7
ant -Dos.prefix=android-arm
ant -Dos.prefix=android-mips64
ant -Dos.prefix=android-mips
ant -Dos.prefix=android-x86-64
ant -Dos.prefix=android-x86
```
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