# Error while building Apex

**URL:** <https://forums.unrealengine.com/t/error-while-building-apex/390880>\
**Category:** World Creation\
**Tags:** source-build, APEX, physx, unreal-engine, CPP, question\
**Created:** [April 14, 2017, 1:41am UTC](https://forums.unrealengine.com/t/error-while-building-apex/390880 "2017-04-14T01:41:36Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![envenger](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@envenger](https://forums.unrealengine.com/u/envenger)\
**Post date:** [April 14, 2017, 1:41am UTC](https://forums.unrealengine.com/t/error-while-building-apex/390880/1 "2017-04-14T01:41:36Z")

</div>

I am trying to integrate Apex to my project.  
I am following this guide for building from source.

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Every step worked fine until I was building apex and I got these errors.

And integrating PhysX to my project is not working as well. Are these error stopping me from integrating PhysX?

```
1>------ Build started: Project: APEX_Destructible, Configuration: debug x64 ------
1> CompoundCreatorBase.cpp
1> ConvexBase.cpp
1> MeshBase.cpp
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1115): error C3861: '__builtin_huge_valf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1120): error C3861: '__builtin_nanf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1125): error C3861: '__builtin_nansf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1115): error C3861: '__builtin_huge_valf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1120): error C3861: '__builtin_nanf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1178): error C3861: '__builtin_huge_val': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1125): error C3861: '__builtin_nansf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1183): error C3861: '__builtin_nan': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1188): error C3861: '__builtin_nans': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1178): error C3861: '__builtin_huge_val': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1183): error C3861: '__builtin_nan': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1188): error C3861: '__builtin_nans': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1241): error C3861: '__builtin_huge_val': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1241): error C3861: '__builtin_huge_val': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1246): error C3861: '__builtin_nan': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1246): error C3861: '__builtin_nan': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1251): error C3861: '__builtin_nans': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\MeshBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1251): error C3861: '__builtin_nans': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\CompoundCreatorBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1115): error C3861: '__builtin_huge_valf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1120): error C3861: '__builtin_nanf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1125): error C3861: '__builtin_nansf': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1178): error C3861: '__builtin_huge_val': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1183): error C3861: '__builtin_nan': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1188): error C3861: '__builtin_nans': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1241): error C3861: '__builtin_huge_val': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1246): error C3861: '__builtin_nan': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\limits(1251): error C3861: '__builtin_nans': identifier not found (compiling source file A:\Work\4.15\Engine\Source\ThirdParty\PhysX\APEX_1.4\module\destructible\fracture\Core\ConvexBase.cpp)
2>------ Build started: Project: APEX_Loader, Configuration: debug x64 ------
2>LINK : fatal error LNK1104: cannot open file 'A:\Work\4.15\Engine\Source\ThirdParty\PhysX\Lib\Win64\VS2015\APEX_DestructibleDEBUG_x64.lib'
========== Build: 0 succeeded, 2 failed, 26 up-to-date, 0 skipped ==========
```