Using Visual GDB in Visual Studio to debug an existing APK with same codebase but it reports that no debugging symbols are being found in native libs and thus no breakpoints being hit. Would have thought that are included with -g in clang options and in debug packaging config with ANT. Unless they are stripped out in signing.
Related
I can successfully build the same C++ code using GCC-8 for Debug (-g -O0) and Release (-g -O2) build.
I can successfully debug the Release-executable on a remote host, but I can't debug the Debug-executable on a remote host, because the Debug-executable imports an extra symbol _ZNKSt9basic_iosIcSt11char_traitsIcEEcvbEv from release version of libstdc++ which doesn't exist.
but I don't want to debug libstdc++, so I think I shouldn't install additional debug version of libstdc++.
it looks like a bug, or am I wrong?
I'm trying to cross-compile for a 64-bit ARMv8 / Raspbian (DietPi actually), from Windows, but I'm getting a series of issues with 3rd-party crates.
What I installed
rust toolchain 1.61.0
ARMv8 gcc toolchain (from here)
MS Visual Studio 2019 C++ build tools (from here)
(IntelliJ IDEA UE and the IntelliJ plugin - FYI but not really relevant to the question)
From there it is possible to add the required target - note that it's dependent on the ARM gcc toolchain (for example the 32-bit version is armv7-unknown-linux-gnueabihf):
rustup target add aarch64-unknown-linux-gnu
Then I edited %USERPROFILE%\.cargo\config and added those lines:
[target.aarch64-unknown-linux-gnu]
linker = "aarch64-linux-gnu-gcc.exe"
And finally, I added those to the PATH:
%USERPROFILE%\.cargo\bin
c:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin (for cmake)
c:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin (for msbuild)
[ARMv8 gcc toolchain]\bin
How I cross-compiled
After making sure everything was compiling and running correctly for Windows, I tried to cross-compile:
cargo build -r --target=aarch64-unknown-linux-gnu
The problem I have
While this worked for simple applications, it quickly becomes clear that many crates fail to compile. For example, freetype-sys, which is a dependency of plotters that I'm using:
error: failed to run custom build command for `freetype-sys v0.13.1`
Caused by:
process didn't exit successfully: `D:\projects\rust\humidity\rh\target\release\build\freetype-sys-4feef64f7ae6c484\build-script-build` (exit code: 101)
--- stdout
[...]
running: "cmake" "[...]\\freetype-sys-0.13.1\\freetype2" "-DWITH_BZip2=OFF" "-DWITH_HarfBuzz=OFF" "-DWITH_PNG=OFF" "-DWITH_ZLIB=OFF" "-DCMAKE_INSTALL_PREFIX=D:\\projects\\rust\\hum
idity\\rh\\target\\aarch64-unknown-linux-gnu\\release\\build\\freetype-sys-3464f88f9fbe3bc0\\out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC" "-DCMAKE_ASM_FLAGS=
-ffunction-sections -fdata-sections -fPIC" "-DCMAKE_BUILD_TYPE=Release"
-- Building for: Visual Studio 15 2017
-- Selecting Windows SDK version 10.0.17763.0 to target Windows 10.0.19043.
-- Configuring incomplete, errors occurred!
See also "D:/projects/rust/humidity/rh/target/aarch64-unknown-linux-gnu/release/build/freetype-sys-3464f88f9fbe3bc0/out/build/CMakeFiles/CMakeOutput.log".
--- stderr
CMake Error at CMakeLists.txt:119 (project):
Failed to run MSBuild command:
MSBuild.exe
to get the value of VCTargetsPath:
Microsoft (R) Build Engine version 16.0.462+g62fb89029d for .NET Framework
Copyright (C) Microsoft Corporation. All rights reserved.
Build started 11/06/2022 11:53:19.
Project "D:\projects\rust\humidity\rh\target\aarch64-unknown-linux-gnu\release\build\freetype-sys-3464f88f9fbe3bc0\out\build\CMakeFiles\3.13.19031502-MSVC_2\VCTargetsPath.vcxproj" on node 1 (default targets).
c:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Microsoft\VC\v160\Microsoft.CppBuild.targets(378,5): error MSB8020: The build tools for Visual Studio 2017 (Platform Toolset = 'v141') cannot be found. To build usin
g the v141 build tools, please install Visual Studio 2017 build tools. Alternatively, you may upgrade to the current Visual Studio tools by selecting the Project menu or right-click the solution, and then selecting "Retarget solution". [D:\p
rojects\rust\humidity\rh\target\aarch64-unknown-linux-gnu\release\build\freetype-sys-3464f88f9fbe3bc0\out\build\CMakeFiles\3.13.19031502-MSVC_2\VCTargetsPath.vcxproj]
Done Building Project "D:\projects\rust\humidity\rh\target\aarch64-unknown-linux-gnu\release\build\freetype-sys-3464f88f9fbe3bc0\out\build\CMakeFiles\3.13.19031502-MSVC_2\VCTargetsPath.vcxproj" (default targets) -- FAILED.
A previous crate required the path to 2019 MSBuild.exe, hence the extra PATH earlier which solved that problem.
This one seems to require MS VS 2017 build tools. This is getting desperate, so I think the problem is coming from something else.
What else I have tried
EDIT1:
I noticed that the Build Tools for Visual Studio 2017 (version 15.9) (here) include a cross-compiler to ARM64. So
I installed this version
launched the (somewhat hidden) vcvarsamd64_arm64.bat script to setup the environment
replaced the aarch64-linux-gnu-gcc.exe executable in %USERPROFILE%\.cargo\config with cl.exe which is the MS compiler/linker.
from the project directory, cargo clean
cargo build -r --target=aarch64-unknown-linux-gnu
It compiles much faster than the gcc toolchain, but it fails compiling the freetype crate:
Compiling freetype v0.7.0
error: could not find native static library `freetype`, perhaps an -L flag is missing?
Same result with the gcc toolchain and MS VC 2017.
Question: What exactly is required to cross-compile to this target? Am I missing something?
do I need to install several versions of VS build tools? I imagine they'll conflict if they're all in the PATH
do I need to install cmake separately, instead of using the one available in VS? (see PATH defined earlier with CMake)
is it simply not possible from Windows?
EDIT2: I'm starting to believe that the freetype create, which hasn't been updated for a few years and is still in version 0.7.0, cannot be cross-compiled for some reason.
UPDATE: I worked around the problem by replacing plotters with something else. It removed the freetype dependency (this module really has an issue) and allowed the cross-compilation to complete successfully.
I'm still interested by a solution to the problem, but it probably involves generating or finding the library for the target and finding a way to feed it to the compiler in the flow, so it may be somewhat convoluted.
I am using VS Code for a C++ Project. I am also using CMake Tools to manage the CMake side of things and my compiler toolchains.
I have two separate compiler kits - i686-w64-mingw32 and x86_64-w64-mingw32 (gcc version 10.1.0).
I have set the gdb.exe path in my launch.json to the path of the 64-bit gdb debugger. This works correctly and I can run and debug with breakpoints as expected.
However, when running the 32-bit executable with the 64-bit debugger, I get no output to my console whatsoever, and the breakpoint is not hit.
What could be the problem?
Don't mix platforms. Debug the 32-bit executable with the 32-bit debugger.
I'm using the Ubuntu packages to develop against the LLVM libraries. Here are the packages I have installed:
libllvm3.1
llvm-3.1
llvm-3.1-dev
llvm-3.1-runtime
llvm-3.1-source
'llvm-3.1-source' contains the source code, but as far as I can tell, none of them contain the debug symbols. So when I get a segfault deep inside some LLVM code, I can't tell at what line of source code it occurs.
How do I get the debug symbols?
LLVM is quick-and-easy to build from source. Download the source packages from http://llvm.org/releases/download.html#3.2 and follow the instructions to build in debug mode. Then you can have full debugging capability into LLVM itself.
I compile the project using bjam with following command bjam toolset=gcc (using gcc-mingw-4.5.2)
I want to debug the project in visual studio 2010.How can it be done?
Note:Using bjam is requirment of my system.
This is impossible: the debug information and format generated by GCC cannot be used with the Microsoft toolchain and vice versa.