How to fix pch file missing on build

Question

When I build my c   solution in Visual Studio it complains that the xxxxx pch file is missing  Is there a setting I am missing to get the pre-compiled headers back   here is the exact error for completeness   Error   1   fatal error C1083  Cannot open precompiled header file   Debug xxxxx pch   No such file or directory

User · Answer

Yes it can be eliminated with the  Yc options like others have pointed out but most likely you wouldn t need to touch it to fix it  Why are you getting this error in the first place without changing any settings  You might have  cleaned  the project and than try to compile a single cpp file  You would get this error in that case because the precompiler header is now missing  Just build the whole project  even if unsuccessful  and than build any single cpp file and you won t get this error

User · Answer

Precompiled Header  pch  use is a two-step process   In step one  you compile a stub file  In VS200x it s usually called stdafx cpp  Newer versions use pch cpp    This stub file indirectly includes only the headers you want precompiled  Typically  one small header  usually stdafx h or pch hpp  lists standard headers such as  lt iostream gt  and  lt string gt   and this is then included in the stub file  Compiling this creates the  pch file   In step 2  your actual source code includes the same small header from step 1 as the first header  The compiler  when it encounters this special header  reads the corresponding  pch file instead  That means it doesn t have to  re compile those standard headers every time   In your case  it seems step 1 fails  Is the stub file still present  In your case  that would probably be xxxxx cpp  It must be a file that s compiled with  Yc xxxxx pch  since that s the compiler flag to indicate it s step 1 of the PCH process  If xxxxx cpp is present  and is such a stub file  then it s probably missing its  Yc  compiler option

User · Answer

Try Build   Clean Solution  then Build   Build Solution   This works for me

User · Answer

NOTE  Later versions of the IDE may use  pch  rather than  stdafx  in the default names for related files  It may be necessary to substitute pch for stdafx in the instructions below  I apologize   It s not my fault    Right-click on your project in the Solution Explorer    Click Properties at the bottom of the drop-down menu  At the top left of the Properties Pages  select All Configurations from the drop-down menu  Open the C C   tree and select Precompiled Headers Precompiled Header  Select Use   Yu  Fill in the Precompiled Header File field  Standard is stdafx h Click Okay If you do not have stdafx h in your Header Files put it there  Edit it to  include all the headers you want precompiled  Put a file named stdafx cpp into your project  Put  include  stdafx h  at the top of it  and nothing else  Right-click on stdafx cpp in Solution Explorer  Select Properties and All configurations again as in step 4         but this time select Precompiled Header Create   Yc   This will only  bind to the one file stdafx cpp  Put  include  stdafx h  at the very top of all your source files    Lucky 13  Cross your fingers and hit Build

User · Answer

In case this is happening to you on a server build  AppCenter  and yo uaer using CocoaPods ensure that your Podfile is checked in   AppCenter only runs the  pod install  command if it finds a Pofile and it DOES NOT find the PODS folder on the files   I had the folder checked-in  but because git automatically ignores  pch files  check you  gitignore to veryfy this   my  pch weren nt being checked in   I sorted my issue by forcing the  pch files to check it  but Deleting the PODS folder should work too  since Appcenter will run the pod install command in that case   Hoppefully this helps somebody

User · Answer

Right click to the project and select the property menu item goto C C   -  Precompiled Headers  Select Not Using Precompiled Headers

User · Answer

I know this topic is very old  but I was dealing with this in VS2015 recently and what helped was to deleted the build folders and re-build it  This may have happen due to trying to close the program or a program halting freezing VS while building

User · Answer

If everything is right  but this mistake is present  it need check next section in      vcxproj file    lt ClCompile Include  stdafx cpp  gt     lt PrecompiledHeader Condition    In my case it there was an incorrect name of a configuration  only first word

User · Answer

Fix    Make sure you have xxxxx cpp in your project Compile xxxxx cpp with  Yc flag  Create Precompiled Header     right click on xxxxx cpp -  properties -  Precompiled Headers -  create  Compile all other files with  Yu flag  Use Precompiled Header     right click on project -  properties -  Precompiled Headers -  use

User · Answer

I was searching for the iOS PCH file having the same problem  if you got here like me too  the solution that I ve found is by clearing derived data  Close Simulator s   go to xCode prefs -  locations -  go to the derived data file path  close xCode  delete the files in the derived data folder  re launch and cheers

[c++] How to fix .pch file missing on build?

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