libmount | A type-safe wrapper around mount system call for rust | File Utils library

As @Someprogrammerdude said above, you need to specify the -l options after your program. Here is the relevant section from the gcc(1) man page:

-llibrary
...
It makes a difference where in the command you write this option; the linker searches and processes libraries and object files in the order they are specified. Thus, foo.o -lz bar.o searches library z after file foo.o but before bar.o. If bar.o refers to functions in z, those functions may not be loaded.

ok, looks like i found my solution here: https://gitlab.alpinelinux.org/alpine/aports/-/issues/12406

quote from Lyle Franklin:

I hit this error when trying to build a cross-platform ARM64 docker image from a AMD64 host. However, running docker run --rm --privileged linuxkit/binfmt:v0.8 or update-binfmts --enable prior to running the build seems to avoid the issue. My understanding Docker will try to use upstream QEMU if it is installed and registered with the kernel, otherwise Docker will fallback to using a built-in forked version of QEMU. The build error above only showed up for me with the forked QEMU.

So I will probably add docker run --rm --privileged linuxkit/binfmt:v0.8 && update-binfmts --enable to my pipeline file if I encounter the error again, for now running it once solved the issue.

Flutter plugins follow a very specific format, and the tooling requires core elements of that format to exist. That includes the public header file with the correct path, as you have discovered, and also the plugin registration, which is the second issues you have (it sounds like you have restored the declaration, but not the implementation).

If your goal is to build your own FFI library code by piggy-backing on the plugin template, you need to leave those core elements in place. Your registration method doesn't need to do anything, but it must exist because the flutter tool will generate a call to it.

It's likely that in the future there will be tooling support for FFI-specific builds, but until then you need to make your library follow the required elements of the plugin structure.

I think when using wxWidgets in VS Code on Linux, the easiest thing is to use CMake. To get started, you'll need both the CMake and CMake Tools extensions:

To get started, open your project in VS Code:

Then open the command pallet and select "CMake:Quick Start":

Then enter a name for the project that will be used in the CMake files and select executable for the project type. I used "cmakewx" for the project. After you select executable, a "CMakeLists.txt" file and a build folder will be created.

Open the CMakeLists.txt file. In the middle of the file there should be a line looking something like:

Add pangocairo to your pkg-config invocation:

I had to compile your source to get on it by myself, but it seems that you are mixing C and C++ statements in your program, which causes GCC to compile it as a C++ file, just as if you were using g++ instead of gcc. EDIT: actually it will since you named your file: "main .cpp ".

In turn, C++ decorates functions prototypes so you can optionally overload them, which will unable pure C libraries to find them back at run time.

Enclosing your signal header prototypes inside a extern "C" block seems to help:

You can use -o /dev/null to discard the output altogether, or you could send it to a temporary file which you then delete. If you're concerned with compile times, you can add -E in order to only run the preprocessor, which is the minimum in order for -H to work. That works because if you tell gcc to stop after preprocessing (-H), it doesn't matter if you also tell it to stop after creating an object file (-c). (That's an exception to the general rule that gcc uses the last of a set of conflicting options, which is designed to let you override options by adding to the end of a command-line.)

However, I can't help thinking that this is not really the best solution to your problem. It seems like you've hand-crafted a compiler invocation with a number of options, and then put it somewhere where it's difficult to modify. A better solution would be to use a makefile and set the value of the various standard makefile variables -- such as CFLAGS, CPPFLAGS, LDFLAGS, LDLIBS -- which are documented in the Gnu make manual. In simple cases, your Makefile might consist only of lines which set these variables, since Gnu make has built-in rules for common targets.

There is a particular section in the inkskape documentation about your question

The major steps:

Have you checked what is happening with dbus-monitor? I'm not familiar with how gdbus works, but it looks like you're trying to call yourself: