title: Xcode warnings: Not such file or directory (.pcm files)
body: <p>I'm working on an iOS project and Xcode is showing me the following warnings:</p>
  
  <blockquote>
    <p>warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/Foundation-KJNK6ICRXLXW.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/Foundation-KJNK6ICRXLXW.pcm
    note: Linking a static library that was built with -gmodules, but the module cache was not found.  Redistributable static libraries should never be built with module debugging enabled.  The debug experience will be degraded due to incomplete debug information.
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/UIKit-35ZFG9L90CDZV.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/UIKit-35ZFG9L90CDZV.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/FBSDKCoreKit-2R2UGDO79AKYU.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/FBSDKCoreKit-2R2UGDO79AKYU.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/Darwin-2GOAYMLU92JOT.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/Darwin-2GOAYMLU92JOT.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/Accounts-3S3JQK7N2N5QB.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/Accounts-3S3JQK7N2N5QB.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/CoreGraphics-5GV9RND36JIM.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/CoreGraphics-5GV9RND36JIM.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/AudioToolbox-1BW8VLA36OG1L.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/AudioToolbox-1BW8VLA36OG1L.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/QuartzCore-1EU3UYK02HRLW.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/QuartzCore-1EU3UYK02HRLW.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/ObjectiveC-20S1MT415HZXU.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/ObjectiveC-20S1MT415HZXU.pcm
    warning: /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/CommonCrypto-210H9VRZX42BI.pcm: No such file or directory
    note: while processing /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/CommonCrypto-210H9VRZX42BI.pcm</p>
  </blockquote>
  
  <p><strong>Things I tried:</strong></p>
  
  <ul>
  <li>Remove derived data, clean build folder and build again</li>
  <li>Disable Clang Module Debugging</li>
  <li>Deintegrate and install Pods again</li>
  <li>Change debug information format to DWARF with dSYM File</li>
  <li>Remove the files shown in the log e.g. <code>rm -rf /var/folders/qj/lk4bdr_x5fs9cvcj4jgx61mmy6f8jd/C/org.llvm.clang.codytwinton/ModuleCache/2UNUM8IHHP92Q/Foundation-KJNK6ICRXLXW.pcm</code></li>
  <li>Delete ModuleCache: <code>rm -rf /var/folders/v2/vjx2r5k16tz36wn8v4yn_sth0000gn/C/org.llvm.clang.moraleda/ModuleCache</code></li>
  </ul>
  
  <p>Any ideas?</p>