Integer Compression Library

Question

I am trying to use this library https://github.com/lemire/SIMDCompressionAndIntersection/ with Visual Studio 2012 but I am getting a few compilation errors.

Headers #include <sys/resource.h> #include <sys/time.h> and #include <sys/mman.h> doesn't exist. I can simply remove them.

After this I am getting errors in many lines which have this format:

__attribute__((const))
inline uint32_t gccbits(const uint32_t v) {
    return v == 0 ? 0 : 32 - __builtin_clz(v);
}

missing type specifier - int assumed. Note: C++ does not support default-int

Does anyone know how to use this library with Visual Studio 2012?

edit: I am compiling this in G++. In terminal I type make example and then ./example. I get a segfault before any output. Anyone know what is wrong?

`__attribute__((const))` is for gcc only. Remove it for MSVC. Although I suspect you will get more errors. like `__builtin_clz` — drescherjm, Aug 19 '15 at 17:07
@drescherjm: Thnaks. Now I am getting not found on `__builtin_clz` and `__asm__` — SuperHeroY, Aug 19 '15 at 17:10
@πάνταῥεῖ you mean ``, since the question is tagged `c++` — RamblingMad, Aug 19 '15 at 17:11
@CoffeeandCode No I meant what I wrote. Using `cstdint` would require to write `std::uint32_t` IIRC. — πάντα ῥεῖ, Aug 19 '15 at 17:14
Also this line gives an error: `void __fastunpack0(const uint32_t *__restrict__ in, uint32_t *__restrict__ out);` — SuperHeroY, Aug 19 '15 at 17:15
@πάνταῥεῖ in theory, yeah; in practice, you can usually unsafely not write `std::`. But that's a pretty lazy excuse not to use `cstdint` when you gotta port the code anyway. — RamblingMad, Aug 19 '15 at 17:20
`edit: I am compiling this in G++. In terminal I type make example and then ./example. I get a segfault before any output. Anyone know what is wrong?` Start a new question about that. — drescherjm, Aug 19 '15 at 18:48

score 3 · Accepted Answer · answered Aug 19 '15 at 17:09

3

From the Requirements section:

A recent GCC (4.7 or better), Clang or Intel compiler.

...

Tested on Linux and MacOS. It should be portable to Windows and other platforms.

Good luck with your port.

answered Aug 19 '15 at 17:09

Nemo

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Integer Compression Library

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