error: unable to spawn process (Argument list too long) in Xcode Build

Question

I am getting this error:

\"error: unable to spawn process (Argument list too long)

** ARCHIVE FAILED **

The following build co

Answer 1

Error - unable to spawn process (Argument list too long)

There are many reason for this error. Some of these are mentioned below:

• Your project might have many swift files (say more than 2000)
• Most of the Swift source files may be deeply nested inside directories

• Many of these files have absolute paths with more than 150 characters (eg. /Macintosh HD⁩/⁨Users⁩/jayprakashnd⁩/⁨mySampleProject/Module1…)

Xcode swift complier takes the absolute paths of all source files while so compiling, the ARG_MX limit is reached and build fails.

This has been fixed in Xcode 11 wherein a flag is used to set unlimited number of swift files.

Solutions:

1. Switch to Xcode 11 and add USE_SWIFT_RESPONSE_FILE to YES in build settings - User Defined Section

2. If you cannot switch to Xcode 11 then take a new checkout of your project in Macintosh HD⁩ ▸ ⁨Users⁩ directory with folder name as minimal as possible.

Solution 2 worked for me like a charm!