I am trying to install a python library that depends on fastnumbers 3.0.0, but when trying to install it, I get the following:
warnings.warn(
running build
running build_ext
creating build
creating build/temp.macosx-11-x86_64-3.9
creating build/temp.macosx-11-x86_64-3.9/src
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -stdlib=libc++ -I/private/var/folders/_d/kht28yq15hjbm17zkr9_zhkh0000gp/T/pip-install-p7m6zg86/fastnumbers_538a0b1c68c844a0a91900d614d59f53/include -I/Users/carlos/ide-mx-decision-fraud/env/include -I/usr/local/opt/[email protected]/Frameworks/Python.framework/Versions/3.9/include/python3.9 -c src/fastnumbers.c -o build/temp.macosx-11-x86_64-3.9/src/fastnumbers.o
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -stdlib=libc++ -I/private/var/folders/_d/kht28yq15hjbm17zkr9_zhkh0000gp/T/pip-install-p7m6zg86/fastnumbers_538a0b1c68c844a0a91900d614d59f53/include -I/Users/carlos/ide-mx-decision-fraud/env/include -I/usr/local/opt/[email protected]/Frameworks/Python.framework/Versions/3.9/include/python3.9 -c src/numbers.c -o build/temp.macosx-11-x86_64-3.9/src/numbers.o
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -stdlib=libc++ -I/private/var/folders/_d/kht28yq15hjbm17zkr9_zhkh0000gp/T/pip-install-p7m6zg86/fastnumbers_538a0b1c68c844a0a91900d614d59f53/include -I/Users/carlos/ide-mx-decision-fraud/env/include -I/usr/local/opt/[email protected]/Frameworks/Python.framework/Versions/3.9/include/python3.9 -c src/objects.c -o build/temp.macosx-11-x86_64-3.9/src/objects.o
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -stdlib=libc++ -I/private/var/folders/_d/kht28yq15hjbm17zkr9_zhkh0000gp/T/pip-install-p7m6zg86/fastnumbers_538a0b1c68c844a0a91900d614d59f53/include -I/Users/carlos/ide-mx-decision-fraud/env/include -I/usr/local/opt/[email protected]/Frameworks/Python.framework/Versions/3.9/include/python3.9 -c src/parsing.c -o build/temp.macosx-11-x86_64-3.9/src/parsing.o
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -stdlib=libc++ -I/private/var/folders/_d/kht28yq15hjbm17zkr9_zhkh0000gp/T/pip-install-p7m6zg86/fastnumbers_538a0b1c68c844a0a91900d614d59f53/include -I/Users/carlos/ide-mx-decision-fraud/env/include -I/usr/local/opt/[email protected]/Frameworks/Python.framework/Versions/3.9/include/python3.9 -c src/strings.c -o build/temp.macosx-11-x86_64-3.9/src/strings.o
src/strings.c:115:20: error: implicit declaration of function '_Py_dg_stdnan' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
return PyFloat_from_NaN(sign < 0);
^
/private/var/folders/_d/kht28yq15hjbm17zkr9_zhkh0000gp/T/pip-install-p7m6zg86/fastnumbers_538a0b1c68c844a0a91900d614d59f53/include/fastnumbers/numbers.h:24:55: note: expanded from macro 'PyFloat_from_NaN'
#define PyFloat_from_NaN(negative) PyFloat_FromDouble(_Py_dg_stdnan(negative));
^
1 error generated.
error: command '/usr/bin/clang' failed with exit code 1
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
I am using a mac with big sur and python 3.9.
I already tried exporting the variables as is stated in this other question but it didn't solve my issue
This is compatibility problem with Python 3.9. It was reported and fixed in Nov 2020. Upgrade to fastnumbers 3.1.0 or 3.2.1.
If you cannot upgrade downgrade to Python 3.8.