I'm building Sage 9.2 from source on macOS Catalina 10.15.7, however, it 
fails 
when trying to install cysignals. More precisely, it throws the following 
error:

gcc -bundle -undefined dynamic_lookup -isysroot 
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk
 
-L/Users/myUser/app/sage-9.2/local/lib 
-Wl,-rpath,/Users/myUser/app/sage-9.2/local/lib -L/usr/local/opt/llvm/lib 
-I/usr/local/opt/llvm/include -Wp,-U_FORTIFY_SOURCE 
build/temp.macosx-10.15-x86_64-3.8/build/src/cysignals/signals.o 
-L/usr/local/lib -L/usr/local/opt/openssl@1.1/lib 
-L/usr/local/opt/sqlite/lib -o 
build/lib.macosx-10.15-x86_64-3.8/cysignals/signals.cpython-38-darwin.so 
-lpari -pthread
  ld: illegal thread local variable reference to regular symbol 
_PARI_SIGINT_block for architecture x86_64
  clang: error: linker command failed with exit code 1 (use -v to see 
invocation)
  error: command 'gcc' failed with exit status 1
  Building wheel for cysignals (setup.py): finished with status 'error'
  ERROR: Failed building wheel for cysignals

This is my compiler version:

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr 
--with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 12.0.0 (clang-1200.0.32.21)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Any idea what the problem might be, and how to solve it?

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