I am trying to build libcurl with openSSL support. I tried using DockerFile and using ubantuimage with that. I am able to compile .so file for libcurl and openSSL. When I try to use those in my android NDK project and load application into device then it gives me error "java.lang.UnsatisfiedLinkError: dlopen failed: could not load library "libssl.so.1.0.0" needed by "libmyLib.so"; caused by library "libssl.so.1.0.0" not found". I have put this versioned file where my libcurl.so,libcrypto.so and libssl.so resides. This kind of error comes for every .so I have used depending on order I have included in my Android.mk file. Let me know how to solve this issue. For every .so mentioned above I can see versioned files. Let me know if more detail is required. I am getting error:
java.lang.UnsatisfiedLinkError: dlopen failed: could not load library "libssl.so.1.0.0" needed by "libmyLib.so"; caused by library "libssl.so.1.0.0" not found
Android doesn't support versioned .so files, you have to rename it so it ends by .so.
clarification: you should rebuild the library in order to change its name and be able to use it - don't just rename the file itself.
Related
I'm trying to get rust working on android. However, when I try to cross-compile to android I get the following linking error:
$ cargo build --target=arm-linux-androideabi
Compiling <project> v0.1.0 (<project>)
error: linking with `/opt/android-sdk/ndk/23.0.7599858/toolchains/llvm/prebuilt/linux-x86_64/bin/armv7a-linux-androideabi31-clang` failed: exit status: 1
(very long toolchain command from cargo)
ld: error: unable to find library -lgcc
clang-12: error: linker command failed with exit code 1 (use -v to see invocation)
I have installed the ndk and changed the linker in .cargo/config to the android clang linker. I also tried the standalone toolchains with the same result. The guide I used was the following: https://mozilla.github.io/firefox-browser-architecture/experiments/2017-09-21-rust-on-android.html
Cross-compilation does work when using crate-type = ["rlib"] instead of crate-type = ["cdylib"], but I need an .so file not an .rlib file.
In case it's relevant, i'm using Manjaro Linux.
UPDATE:
I found the following pull request: https://github.com/rust-lang/rust/pull/85806 After switching to ndk22 it worked. I havn't tried if the pull request fixes the issue (probably does).
Without switching to an older NDK version, I found using the workaround provided by ssrlive to work for me. Here's their comment:
Fixing build error for NDK 23 and above
find out all the 4 folders containing file libunwind.a, in my PC,
it's
C:\Users\Administrator\AppData\Local\Android\Sdk\ndk\23.1.7779620\toolchains\llvm\prebuilt\windows-x86_64\lib64\clang\12.0.8\lib\linux\x86_64\
and more. create 4 text files named libgcc.a in the same folders
with this contents
INPUT(-lunwind)
reference
link
In macOS, the paths are
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/i386/libunwind.a
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/arm/libunwind.a
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/aarch64/libunwind.a
~/Library/Android/sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/darwin-x86_64/lib64/clang/14.0.1/lib/linux/x86_64/libunwind.a
In Linux, the paths are
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/i386/libunwind.a
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/aarch64/libunwind.a
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/x86_64/libunwind.a
~/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux/arm/libunwind.a
In Windows, the paths are
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/aarch64/libunwind.a
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/arm/libunwind.a
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/i386/libunwind.a
~/AppData/Local/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/windows-x86_64/lib64/clang/14.0.1/lib/linux/x86_64/libunwind.a
create file command in Linux/macOS
cat << EOF > libgcc.a
INPUT(-lunwind)
EOF
This is of course extremely brittle and not the "right" solution, but the workaround works fine as of 2022-10-12 with ndk version 25.1.8937393.
I'm new to the world of cmake and linking to libaries. Now for a project I need to include a third party library in the current application. However I'm having problems linking to the library.
Here is what I have:
The library is build in the location D:/qwt-6.1.2, which contains:
the folder /src with the header and source files
the folder /lib which contains (qwt.dll, qwt.ext, qwt.lib, qwtd.dll, qwtd.ext, qwtd.ilk, qwtd.lib and qwtd.pdb.
I have tried to add the following to the cmake file:
add_executable(Demo main.cpp mainwindow.cpp mainwindow.h )
include_directories(D:/qwt-6.1.2/src)
link_directories(D:/qwt-6.1.2/lib)
target_link_libraries(Demo qwt)
The including goes fine since the intellisense of visual studio can the includes that I do, however when I build I get the error:
Error 1 error LNK1104: cannot open file 'qwt.lib'
Does anybody have an idea what I'm doing wrong? I don't care at the moment if it is statically or dynamically linked.
I was wondering how do I include libyuv library to my Android Studio Project. I have the "libyuv_static.a" file which is a pre-compiled binary file but I did everything to include it in my project. I created a folder inside src/main named jniLibs and puted the binary file inside the folder but in runtime it doesn't load the library and it gives me this:
Caused by: java.lang.UnsatisfiedLinkError: Couldn't load libyuv2rgb
from loader
dalvik.system.PathClassLoader[dexPath=/data/app/com.example.myproject-1.apk,libraryPath=/data/app-lib/com.example.myproject-1]:
findLibrary returned null
. Could someone please share his/her experience.
In order to include a native library into an Android project, you have to get a .so file (shared library), not a .a (static library).
ie. you should end up with src/main/jniLibs/<abi>/libyuv_shared.so with <abi> being armeabi, armeabi-v7a, arm64-v8a, x86, x86_64, mips, mips64 (any architecture your app and lib support).
There is an Android package now: https://github.com/crow-misia/libyuv-android, installable from mavenCentral:
dependencies {
implementation 'io.github.crow-misia.libyuv:libyuv-android:0.25.0'
}
For usage see https://github.com/crow-misia/libyuv-android/blob/main/sample/src/main/java/app/MainActivity.kt
I am in the middle of integrating UA into my Phonegap/iOS application using the UA Phonegap plugin https://github.com/urbanairship/phonegap-ua-push.
Unfortunately, I can not get it to work. Even the sample project fails to build. The problem is a duplicate symbol during linking. Please note: i did not include any additional headers, libs, etc. I am just trying to build the iOS sample project.
The clashing symbol seems to be rooted in the ASI* (ASIHttpRequest, ASIAuthenticationDialog, etc) library, which has been integrated into UA. Surprisingly, the clashing happens between both UA libs (libUAirship-1.3.2.a and libUAirshipPush-1.3.2.a).
Linker output: ld: duplicate symbol _OBJC_METACLASS_$_UA_ASIAutorotatingViewController in /Users/b/Downloads/urbanairship-phonegap-ua-push-9b7a89b/ios-sample/Airship/libUAirshipPush-1.3.2.a(UA_ASIAuthenticationDialog.o) and /Users/b/Downloads/urbanairship-phonegap-ua-push-9b7a89b/ios-sample/Airship/libUAirship-1.3.2.a(UA_ASIAuthenticationDialog.o) for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
How can this happen?
This issue appeared for me when I add the flag "-ObjC" in my target settings at "Other Linker Flags".
Check it, i need the flag for an another library but if it's not your case...
I have a CMake module to locate FreeGLUT:
FIND_PATH(FREEGLUT_INCLUDE_DIR NAMES GL/freeglut.h)
FIND_LIBRARY(FREEGLUT_LIBRARY NAMES freeglut freeglut_static)
SET(FREEGLUT_LIBRARIES ${FREEGLUT_LIBRARY})
SET(FREEGLUT_INCLUDE_DIRS ${FREEGLUT_INCLUDE_DIR})
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(FreeGLUT DEFAULT_MSG FREEGLUT_LIBRARY FREEGLUT_INCLUDE_DIR)
MARK_AS_ADVANCED(FREEGLUT_INCLUDE_DIR FREEGLUT_LIBRARY)
It works fine and locates freeglut_static.lib when I generate NMake Makefiles on Windows. I'm attempting to statically link FreeGLUT into my DLL:
FIND_PACKAGE(FreeGLUT REQUIRED)
ADD_LIBRARY(vti SHARED ${VTI_SOURCES})
ADD_DEFINITIONS("-DBUILD_VTI=1 -DFREEGLUT_STATIC=1")
INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include ${FREEGLUT_INCLUDE_DIRS})
TARGET_LINK_LIBRARIES(vti ${FREEGLUT_LIBRARIES})
My source code builds correctly, but when it gets to the linking stage, VC++ fails with:
LINK : fatal error LNK1104: cannot open file 'freeglut.lib'
Which is strange since freeglut.lib isn't mentioned anywhere that I can see in the generated NMake makefiles. It should be trying to link with freeglut_static.lib, which CMake locates and sets in FREEGLUT_LIBRARIES.
What might be causing this?
This is caused with pragma directives in FreeGLUT code (see freeglut_std.h). Using FREEGLUT_STATIC should really fix that for you, but I think you should pass it to CMake without quotes: ADD_DEFINITIONS(-DBUILD_VTI -DFREEGLUT_STATIC)