I'm running OS 10.11, and my Xcode version is 7.2.
All of the sudden my project fails to compile in Xcode. Xcode seems to be confused about the file type -- I'm getting errors that indicate my code is being compiled as C++ even tho all the files in my project are labeled as type Objective-C code. Here are some of the errors that occur in deeply-nested system header files:
Unknown type name 'namespace' 'utility' file not found (from #include_next <utility>)
I've verified that all the files are listed as Objective-C. I've even tried changing them to Objective-C++, by 'Identity and Type', and by also changing the extensions to .mm, but this introduces an even bigger set of mysterious compile errors deep in system-level header files, such as:
Use of undeclared identifier 'nullptr_t'; did you mean 'nullptr'? No member named 'memchr' in the global namespace
I've tried reinstalling Xcode a couple times. Any suggestions?
Further mystifying is that I have a different Mac with the same version of OS X, same version of Xcode, and with the exact same code (verified thru git), and it compiles fine.
I created a new project, copied all the files and configuration to the new project, and the issue resolved itself.
So, I've tired everything to get this to work after I've archived the application, but it keeps failing to open with the error message:
Dyld Error Message:
Library not loaded: /Library/Frameworks/RNCryptor.framework/Versions/A/RNCryptor
Referenced from: /Users/USER/Desktop/Project.app/Contents/MacOS/Project
Reason: image not found
I've added the Framework to the Copy Files Build Phase, I've changed the Runpath Search Paths to #loader_path/../Frameworks and the Framework Search Path to #executable_path/../Frameworks and it still doesn't want to open.
It opens fine in Xcode itself, but as soon as it's archived, it complains and doesn't run.
Any help is much appreciated :)
Ok, so I was able to fix it.
So the application was actually looking for the Framework in /Library/Frameworks/ on my Mac, I originally had thought it was looking for a reference in my actual .app file.
To fix it I opened up Terminal, cd' into the folder containing a copy of RNCryptor.framework and used this command
install_name_tool -id #executable_path/../Frameworks/RNCryptor.framework/RNCryptor RNCryptor.framework/RNCryptor
Then removed the old framework from the Xcode Project and re-inserted it using the Framework I just used from the directory I cd' into, and added the new Framework to the Copy Files Build Phase.
And voila, it worked :)
When building my Objective-C project (for Mac OS 10.9, Xcode 5.11), I get the error message
Lexical or Preprocessor Issue 'OpenGL/OpenGL.h' file not found.
The error is caused by the include section of the file CVDisplayLink.h where the above named file is included. CVDisplayLink.h belongs to the framework CoreVideo. Now there are two strange points related to that issue:
The error appeared after I tried to test some basic OpenGL features using the tutorial in the Mac Developer Library ( https://developer.apple.com/library/mac/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_drawing/opengl_drawing.html#//apple_ref/doc/uid/TP40001987-CH404-SW8 ).
I added an NSOpenGLView to my MainMenu as well as the related code given in the tutorial. Then the error message appeared. I also tried to add the OpenGL and CoreVideo frameworks to my project target, but this did not help.
After some frustration, I removed the NSOpenGLView from my project, as well as all related code. Now the error Message still appeares and I have no Idea how to ged rid of it.
I downloaded Scintilla, built and ran ScintillaTest. That worked (almost) fine. Now, I want to include Scintilla in a new project, but can't seem to figure out how to. I tried ctrl-clicking my target and selecting Add Existing Framework..., then Add Other... and finally file located at scite337/scintilla/cocoa/ScintillaFramework/build/Release/Scintilla.framework (obviously I omitted the first part of the path).
After I did this I just added an #import statement in the AppDelegate of my further untouched new project. Upon hitting Cmd+R it says ScintillaView.h: no such file or directory...
I thought that if I added the framework to my only target it would pass the location of the header files to the compiler (and preprocessor). Obviously it doesn't, so I assume I'll have to add the paths of the header files (and maybe other files) to the Build Settings, but there are lots of Build Settings, so I don't have a clue where.
If you don't have access to XCode 3.2.x, please leave how you'd do it in a newer version. I've found a lot of information on other XCode matters for higher versions did that work well in XCode 3.2.5 too (with a little bit of searching for menu items and settings panels).
By looking at the ScintillaTest XCode project I discovered how it works: you have to import the XCode project called ScintillaFramework, which is the file named ScintillaFramework.xcodeproj (obviously). But that isn't enough, after that XCode still can't find the header files in the framework. I looked at the build settings in the ScintillaTest project and found 'Header Search Paths' set to ../../. Setting this failed in my project, it had to be one directory less back: ../. No I just need to get the compiler to accept the C++ constructs in the Scintilla framework.
Update:
Strangely, this stopped working. I do not understand it either. So I just right-clicked my target, from there: add existing framework...->add other...->[browse to ScintillaFramework/build/Release/Scintilla.framework]. This works partially, see my newest question.
This question has evolved over the past several weeks to cover more general issues with xcode4 (and upgrading projects form older xcodes).
However many of the issues can be solved by following the same set of instructions.
If you have any of the following issues, try the methods in the accepted answer:
Xcode 4 fails to archive an App
Xcode 4 creates an unusable archive
Xcode 4 does not create an .ipa
Xcode 4 fails to compile due to preprocessor errors
Xcode 4 cannot find headers
Xcode 4's code complete is not working
Project dependancies won't compile
Adding a dependancy causes any of the above issues
Original Question
Title: "lexical or preprocessor issue file not found" in Xcode 4
I have a project in Xcode 4 that will build fine and run on the device and simulator but when trying to Archive it errors when looking for headers files associated with a static library:
In file included from /Volumes/Development/Path/LBProject/LBProject/LBProject-Prefix.pch:15:
In file included from /Volumes/Development/Path/LBProject/LBFDefines.h:23:
In file included from /Volumes/Development/Path/LBProject/Classes/LBProjectAppDelegate.h:11:
In file included from /Volumes/Development/Path/LBProject/LBProject/../FKNDirectory/FKNDirectoryManager.h:10:
/Volumes/Development/Path/LBProject/LBProject/../FKNDirectory/FKNDataModel.h:11:9: fatal error: 'Merchant.h' file not found [1]
#import "Merchant.h"
^
1 error generated.
Xcode gives the error
lexical or preprocessor issue file not found
Much Googling has show many people are having this issue but no solution. Anyone got a fix or even a clue.
Update: The user header search paths are set to ${BUILT_PRODUCTS_DIR} in all configurations. It builds fine using any configuration except when archiving.
Update 2: Merchant.h is a Core Data class that is auto-generated and therefore inside .xcdatamodeld package, however the headers are all copied to the public headers directory when the library is built.
NB: The steps below will solve 90% of your Xcode archive issues
however, from the comments it is suggested you try quitting Xcode
first. This may save you hours of setting tweaking.
Check the "user header paths" are correct (Add "" to paths for spaces, both in your project and dependencies)
Set "Always search user paths" to YES
Create a group call "Indexing headers" in your project and drag the headers to this group, DO NOT add to any targets when prompted. This includes any headers inside your .xcdatamodeld, you'll need to right-click and view package contents to find them.
For all dependencies set "Skip Install" build setting to "Yes"
Moving any "Public" headers in Build Phases to "Project"
Set the Build Setting "Installation Directory" on your Target to $(LOCAL_APPS_DIR)
Change the target build setting "scan all source files for includes" to YES. (link)
With newer versions of Xcode (> 4.2) you might want to read this question related to workspaces.
Manually delete the project.xcworkspace files form all referenced projects
I had the same problem in XCode 4: "Lexical or preprocessor issue MyFile.h not found". However, MyFile.m was not a static library, just a standard class. And MyFile.m and MyFile.h were included properly and indexed in the project.
So ... I quit XCode and the Simulator, then restarted them and the problem disappeared.
I found that the problem went away when I changed the target build setting "scan all source files for includes" from no to yes.
I was able to resolve this issue without any changes to any of the build settings by simply copying the .h files into the Project's directory in the finder. I did NOT add them to the project at all. Just having them in the project's filesystem directory seemed to be enough to allow Xcode's implicit linking to work properly. More details here.
I had a weird issue like this. Changing "Scan all resource files..." to Yes didn't help. I took a look at the Framework Search Paths and noticed that I had
$(inherited)
"$(SRCROOT)"
"$(SRCROOT)/my/correct/path"
It seemed right but was still failing. I then tried rearranging the order of 2 & 3 and all of a sudden it built fine. So not sure why that was the hickup, but wanted to add it to the list of things to try in case it helps someone else.
My solution was to change my
#import "HeaderFile.h"
to
#import <FrameworkName/HeaderFile.h>
and everything started working again.
What was unusual was that it had stopped working suddenly after building
a few times.
The problem resolved itself when I set
Build Settings->Project->Search Paths to Yes
I had the same — 2 targets in my project (Project and ProjectTest of GHUnit). When my scheme was set up to Project, the import of <GHUnitIOS/GHUnit.h> was problem of “lexical or preprocessor issue file not found”. But when I set as a scheme ProjectTest, everything was OK. So, I have added GHUnitIOS.framework in Project too.
Looks like your header search paths are incorrect not configured properly in your build settings for the active scheme. Verify them and update your question with the current setting.
I'm having similar issues on the simulator but not the device and my header search path fields are empty (Seems to be default). But changing Workspaces seems to have solved the issue. Maybe you could try creating a new Workspace, add your project to it and see if that helps. Now I'm investigating why.
I was getting this "file not found" error for one particular .h file in my project. I resolved the issue by removing that .h file from the project (selecting "Remove references") and re-adding it.
Adding on more variant: I had two instances of foo.m in the Compile Source build phase, which some how caused "Header not found" for foo.h.
Another chance:
In workspace project: watch in the Target for section Build Phases. As many manuals says you need to have a Copy Files Build Phase to copy all your headers to another place, as iOS Framework cannot contain header files to be shared (this is my case).
Choose for those Copy Files as Destination option "Products Directory". Or another directory of your like where the headers will reside.
That worked for me. Probably the build for Archive (or Release) directory is very different than expected in build for Debug .
Also check in your workspace settings your build directory.
XD
For me, this issue occurred after I added new files to the project; a blank .m and .h derived from NSObject. Here's how I resolved it:
Closed and restarted xCode
Deleted the two new files via XCode
Recompiled successfully
I then Re-added them afterward and it also worked.
Definitely a bug in xCode...