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Author Topic: Why are there two LibFT4222-64.lib files in LibFT4222-v1.4.5.zip?  (Read 874 times)

allenhuffman

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Why are there two LibFT4222-64.lib files in LibFT4222-v1.4.5.zip?
« on: July 03, 2023, 02:57:05 PM »
I have only been building for 64-bit, but recently was told to create a 32-bit as well. During the process of updating from 1.4.4 to the 1.4.5 zip, I noticed there are duplicate lib files with the same name, but different file sizes:

LibFT4222-v1.4.5.zip\LibFT4222-v1.4.5\imports\LibFT4222\dll\amd64 -- 3 KB

LibFT4222-v1.4.5.zip\LibFT4222-v1.4.5\imports\LibFT4222\lib\amd64 -- 743 KB

In our existing project, the files needed were collected together, but I am not sure which one I should use now.

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Re: Why are there two LibFT4222-64.lib files in LibFT4222-v1.4.5.zip?
« Reply #1 on: July 04, 2023, 04:35:02 PM »
Hello,

It depends if you are building a static or dynamic application.

.lib is a static library which is linked into an .exe at compile time. Only the .lib is included in the folder.
.dll is a dynamic library that is loaded at runtime. That includes a .lib for the symbols.

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FTDI Community
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allenhuffman

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Re: Why are there two LibFT4222-64.lib files in LibFT4222-v1.4.5.zip?
« Reply #2 on: July 05, 2023, 02:46:55 PM »
Quote from: FTDI Community on July 04, 2023, 04:35:02 PM
Hello,

It depends if you are building a static or dynamic application.

.lib is a static library which is linked into an .exe at compile time. Only the .lib is included in the folder.
.dll is a dynamic library that is loaded at runtime. That includes a .lib for the symbols.

Fantastic -- I did not know a static library was provided. Thanks!

I see only one ftd2xx.lib - what DLL does it use?

Quote
•   D2XX Interface
ftd2xx.h
  Dynamic library
    ftd2xx.lib (32-bit)
    ftd2xx.lib (64-bit)
« Last Edit: July 05, 2023, 03:24:57 PM by allenhuffman »
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FTDI Community

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Re: Why are there two LibFT4222-64.lib files in LibFT4222-v1.4.5.zip?
« Reply #3 on: July 06, 2023, 04:42:14 PM »
Hello,

There are two ftd2xx.lib files for x86 and x64.

The static .lib doesn't rely on a .dll.

Again you can reference the most recent .lib and .dll for D2xx in the 2.12.36.4 driver files.

TN_153 Instructions on Including the D2XX Driver in a Visual Studio Express 2013 Project should help you too.

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FTDI Community
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