On 27/02/2023 14:49, Iain Sandoe wrote: > Hi Shengyu, >> By the way, is it expected that I need to configure with `--with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX13.sdk`? >> >> Yes. >> - for some time now macOS no longer installs headers in /usr/include (and on newer versions most of the libraries are omitted from /usr/lib). The libs are now squirreled away in the DSC (dylib shared cache). For our protection. If you want to script the detection of sysroot you can use xcrun --sdk macosx --show-sdk-path (but that doesn't work with old versions of XCode). A+ Pau