lp_solve 线性规划求解包的使用

网上关于lpsolve的资料不多，也没有怎么说配置，对于初入这个包的人来说，非常痛苦，我也是搞了一天，才在mac和win上都搞了出来。具体使用还是蛮简单的。

内容post在了stack overflow上，本来是个提问帖，结果自问自答了。这是链接：https://stackoverflow.com/questions/46639534/using-lp-solve-with-visual-studio-2015。 原文也搬过来了，懒得翻译了。

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I'm rather new to C++. I'm trying to use VS2015 and the lp_solve library(https://sourceforge.net/projects/lpsolve/files/lpsolve/5.5.2.5/) to solve my linear eq problem(for exact Gromov-Hausdorrf Distance, see https://mediatum.ub.tum.de/doc/1231885/1231885.pdf section 3.1 and 3.3). My machine is x64 system. Here is what I've done:

• donwload the lp_solve_5.5.2.5_dev_win64.zip package and decompress it.
• specific the library directoy(through project -> properties -> linker)
• specific lib I used (liblpsolve55.lib and liblpsolve55d.lib for statically linking) through project->properties->linker->input->additional dependency.
• declare the .h file directory(through project->properties->C/C++).

• Here is what I declare in my code:

  #include "lp_lib.h"

  #pragma comment(lib, "liblpsolve55.lib") // static

  #pragma comment(lib, "liblpsolve55d.lib") // static for debug

While when I run the code with x86, it will show the following problems:

• error LNK2019: unresolved external symbol _make_lp@8 referenced in function "void __cdecl my_solve [totally 13 errors like this]
• warning LNK4272: library machine type 'X86' conflicts with target machine type 'x64' [totally 2 warnings like this]

While when I switch the runner with x64:

• I got 550 errors, mainly due to the “dlfcn.h”: No such file or directory

• in the lp_lib.h file, it has lines:

  #if (LoadInverseLib == TRUE) || (LoadLanguageLib == TRUE)  #ifdef WIN32    #include <windows.h>  #else    #include <dlfcn.h>  #endif#endif

• which means it has treat me as a linux machine since dlfcn.h is for unix/linux

I've also try to use the 32bit version package(lp_solve_5.5.2.5_dev_win32.zip), but it do not work either.

• with x86 runner:__iob, _printf issues.
• with x64 runner:“dlfcn.h”: No such file or directory

I've successively build and run the demo in my mac with the corresponding package(lp_solve_5.5.2.5_dev_osx32.tar.gz). But I still want to know how to build and run it in VS2015.

Here I'll state what I do in mac if anyone need it(using Xcode).

• download the lp_solve_5.5.2.5_dev_osx32.tar.gz package
• add all the .h file in build phase -> headers
• add the liblpsolve55.a file in build phase -> link binary with libraries
• (if you want to use .dylib as dynamic linking, add it to the build phase -> copy file, but it do not work for me)
• in build setting, set the Architectures to 32-bit intel
• in build setting, set the Build Active Architecture Only to No

Thank you very much, actually nobody answer this question :) But I've solve the problem myself. Here is what I do for VS2015:

• use package lp_solve_5.5.2.5_dev_win32.zip

• add the .h file and .lib as above

• change the run library, through properties -> C/C++ -> code generation -> run library -> change the DLL(/MDd) to (/MTd)

• if you still got some fprintf issues, go to properties -> linker -> input -> additional dependency, and add : legacy_stdio_definitions.lib

That will be OK. That my be some translation issue, yes I use the chinese-version VS...