jibsen

10 yıl öncediscuss

I don't have WSL available, but I would love some numbers for tasks like cloning a large repository with git and running cmake. These things tend to be slow on Windows due to fork, see for instance this comparison for Windows vs. Linux in a VM:

https://gist.github.com/jibsen/7ebeddde3bc2bfd421b96ae53a824...

jibsen

10 yıl öncediscuss

Regarding #3, it's worth noting that even though the elements of the two-dimensional array form a contiguous block of integers, you cannot treat them as such [1].

[1]: http://c-faq.com/aryptr/ary2dfunc2.html

jibsen

10 yıl öncediscuss

I suppose due to DST, the same clock time on the next calendar date might not exist or be ambiguous.

jibsen

10 yıl öncediscuss

This was a very convenient way to share files because links were direct. Some people even used the public folder to host small static sites.

Interestingly their help site lists the change as March 15, 2016 instead of 2017, but perhaps they got all the dates wrong there [1]. At least I got the same email.

[1]: https://www.dropbox.com/help/16

jibsen

10 yıl öncediscuss

I also seem to have an annual attempt at switching to Vim [1]. I can do enough basic commands to survive, but I am so far from the productivity in Sublime/Atom that I always end up going back to them.

[1]: https://www.donationcoder.com/forum/index.php?topic=37747

jibsen

10 yıl öncediscuss

It's worth noting that ssize_t is a POSIX type, and is only guaranteed to have the range [-1, SSIZE_MAX] (basically a size type with one error value) [1]. If you need negative sizes, then ptrdiff_t is perhaps better.

[1]: http://pubs.opengroup.org/onlinepubs/009696699/basedefs/sys/...

jibsen

10 yıl öncediscuss

Using mingw-w64 (GCC 6.1.0):

  g++ -Os -static -s on `int main() { }' 17.408 bytes
  g++ -Os -static -s on `int main() { throw 42; }' 139.776 bytes

jibsen

10 yıl öncediscuss

Try compiling with a recent 64-bit GCC and adding `-mtune=native -flto` to the mix.

jibsen

10 yıl öncediscuss

It compiles fine with mingw-w64 on Windows. MSVC is a bit more involved due to the GCC extensions used. When LZFSE first came out I made a fork with the changes to compile with MSVC [1], but there wasn't any interest in it.

[1]: https://github.com/jibsen/lzfse/tree/msvc-compatibility

jibsen

10 yıl öncediscuss

Most importantly, whatever the language or codebase you are working in/on mandates.

I write a lot of C, and given the choice, I tend to prefer tabs for indentation and spaces for alignment. I use a tab-width of 8, so the code will look fine for anyone using a lower tab-width.

Converting from tabs to spaces is a simple search-and-replace, whereas the other way is more work (there was an article here recently about algorithms to guess indentation width).

jibsen

10 yıl öncediscuss

Back in 1997-1998 I wrote a compressor for DOS 16-bit executables called aPACK (and a library, aPLib, with the compression code). I still occasionally get an email from someone trying to get them to work, so they must still be in use :-).

jibsen

10 yıl öncediscuss

I don't know if it is due to various fork implementations being slow on Windows, but programs that spawn a lot of subprocesses like build tools can be really slow [1].

I would love to see some numbers for those from Bash on Windows.

[1]: https://gist.github.com/jibsen/7ebeddde3bc2bfd421b96ae53a824...

jibsen

10 yıl öncediscuss

The Mac version has gotten a lot of good response, so I tried installing the Windows version. It feels a bit like a beta sadly.

  - Backups to local folder do not work
  - Scheduled backups don't always run until you open the GUI
  - Open log viewer before any backups have been performed crashes the app
  - File-Exit does nothing
  - Wizard adds whole C:\ to first destination
  - Doesn't seem to backup (all) locked files

I've reported all of these, and the author seems responsive, so I hope it gets better.

jibsen

10 yıl öncediscuss

To a large degree the language didn't change (some of the undefined behaviours we are discussing were in C89), rather the compiler vendors started to enforce parts of it.

jibsen

10 yıl öncediscuss

I would love to see how it compares to a Linux VM for tasks that involve a lot of shelling out to run other tools.

The native Windows versions of git and CMake can be awfully slow [1].

[1]: https://gist.github.com/jibsen/7ebeddde3bc2bfd421b96ae53a824...

jibsen

10 yıl öncediscuss

I wonder why they did not add `--ff-only` as an option, like GitLab has.

jibsen

10 yıl öncediscuss

It seems that the target option might be the one I was looking for.

The installed version defaults to x86_64-pc-windows-msvc, where the msvc at the end suggests it is looking for MSVC headers.

If you specify x86_64-w64-mingw32 as target, it uses the mingw-w64 headers.

jibsen

10 yıl öncediscuss

What really confused me was that from the llvm front page, if you click Win Installer, you get a version that seems to expect MSVC headers, while if you click LLVM 3.8.0 you get the page you are linking, where the installers appear to expect MinGW headers.

Or perhaps there is some option in both of them to select the other?

jibsen

10 yıl öncediscuss

You might like Clang with Microsoft CodeGen[1], a work in progress by Microsoft to add a Clang toolset to Visual Studio 2015 that uses the MSVC backend.

[1]: https://blogs.msdn.microsoft.com/vcblog/2015/12/04/clang-wit...

jibsen

10 yıl öncediscuss

Pointers to character types get some special treatment. They can be used to address the individual bytes of other objects (C11 6.3.2.3p7), and the strict aliasing rule allows character types to be used to access those bytes (6.5p7) (one interesting note is that uint8_t is not strictly required to be a character type [1]).

The problem with assuming things like a pointer working like an integer, is that compiler vendors may choose to start taking advantage of any undefined behavior and point to the standard if you complain.

[1]: https://gist.github.com/jibsen/da6be27cde4d526ee564

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