Instruction for R-package installation with precompiled dll/lib #598
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R-package/README.md
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| The default compiler is Visual Studio (or [MS Build](https://www.visualstudio.com/downloads/#build-tools-for-visual-studio-2017)) in Windows. You also can use Rtools (default) or [MinGW64](https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/) (x86_64-posix-seh) to compile by setting `use_mingw` to `TRUE` in `R-package/src/install.libs.R`. | |||
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| It is recommended to use *Visual Studio* for its better multi-threading efficency in Windows for many core systems. For simple systems (like laptops or small desktops), MinGW64 is recommended. | |||
| It is recommended to use *Visual Studio* for its better multi-threading efficency in Windows for many core systems. For simple systems (like laptops or small desktops), MinGW64 is recommended. By default, it will attempt to build the package using Visual Studio. For MinGW users who wants to install online, please check the end of this document for installation using a helper package ([Laurae2/lgbdl](https://github.com/Laurae2/lgbdl/)). | |||
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By default, it will attempt to build the package using Visual Studio. seems is duplicate to The default compiler is Visual Studio at line 10 .
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@Laurae2 Another problem is: The Rtools seems is still needed when build from visual studio. I try to build without Rtools, and it fails. |
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@guolinke Unfortunately, can't install any R package without Rtools in Windows when it has a |
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Rtools is 99.99% mandatory to live with Windows and R packages, so it should not be much a problem (especially for high performance purposes without precompiled packages). I know there might be issues on heavily locked down machines about installing and using Rtools: r-lib/devtools#200 (comment) |
R-package/README.md
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| It is recommended to use *Visual Studio* for its better multi-threading efficency in Windows for many core systems. For simple systems (like laptops or small desktops), MinGW64 is recommended. By default, it will attempt to build the package using Visual Studio. For MinGW users who wants to install online, please check the end of this document for installation using a helper package ([Laurae2/lgbdl](https://github.com/Laurae2/lgbdl/)). | ||
| It is recommended to use *Visual Studio* for its better multi-threading efficency in Windows for many core systems. For simple systems (like laptops or small desktops), MinGW64 is recommended for maximum performance. |
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Actually, In my i7-6700, VS is still faster than MinGW. And from your result on i7-4600u, the gap seems is also small (about 105%) .
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I changed the wording of the sentence. User by default should choose VS when they don't know, but fall back to MinGW if they have a special need on a slow dual core system (or worse).
* readme Helper package for R-package installation * Fix code indentation bug * Add warning about default compiler in Windows * Avoid repeat * Add Rtools requirement * Wording to promote VS as default choice for user
Some instructions for R-package installation with precompiled dll/lib.