CFLAGS =“-arch armv7”与CFLAGS =“-arch armv7 -arch arm64”

Question

I want to compile a static library that supports both armv7 and arm64.What are the differences between the following two operations?

• CFLAGS="-arch armv7" CFLAGS="-arch armv7" Build the two architectures separately and then use lipo to create a fat static libraries.

• CFLAGS="-arch armv7 -arch arm64" Build static libraries that support both architectures at once.

Answer 1

There should be no difference. You can examine the libraries produced using the command

lipo -detailed_info YOUR_LIBRARY_NAME

Both of them should be fat files.