Xcode Question posted in
Whether you're new to Xcode or an experienced developer, our archive has everything you need to know about this integrated development environment (IDE). From basic functionalities to advanced features, our archive covers a wide range of Xcode-related questions and answers. Browse our archive now and find solutions to your Xcode questions, and take your app development skills to the next level

Xcode – Build FFTW for Apple M1 and the older intel devices

I built FFTW on my Apple m1 computer. When I run lipo -info libfftw3.a (which is located in .libs/libfftw3.a). It says it is of architecture ARM64.

In my Xcode I set the build target to 10.11, for backward compatibility.

Now when I add the FFTW library into my Xcode project, it complains:

The linked library ‘libfftw3.a’ is missing one or more architectures
required by this target: x86_64.

How can I solve this? Do I need to build the library in an Intel device and create a universal library with these two libraries together (using lipo) or what’s the right way to solve this?

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    In order to build a static library for both Intel and Apple silicon archictures, I need to build FFTW for both arch individually and then make an universal library. Here is how I do it.

    1. Go to FFTW root folder

    2. Build for Intel arch

      ./configure --prefix=/path/to/build/folder/lib-intel CFLAGS="-arch x86_64 -mmacosx-version-min=10.11” make make install

    3. Build for arm64

      ./configure --prefix=/path/to/build/folder/lib-arm64 CFLAGS="-mmacosx-version-min=10.11” make make install

    4. Make an universal build

      lipo -create path/to/build/folder/lib-intel/libfftw3.a path/to/build/folder/lib-intel/libfftw3.a -output libfftw3_universal.a

    5. Include libfftw3_universal.a in the Xcode project


  2. 0

    You can configure it also with this line and it will build x86_64 & arm64 binary.

    ./configure CFLAGS="-arch arm64 -arch x86_64 -mmacosx-version-min=11.0"
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search