Build failure on MacOS requires manual overrides

Summary

I used brew to install cmake, pkg-config, and libgmp (i.e. brew install cmake pkg-config gmp

I then followed the instructions to do the install step and the fastecdsa build is failing because it can't find the gmp.h header file. The file does exist:

%. pkg-config --cflags gmp
-I/opt/homebrew/Cellar/gmp/6.3.0/include

% ls /opt/homebrew/Cellar/gmp/6.3.0/include
gmp.h	gmpxx.h

For some reason the cmake files and/or the fastecdsa build files aren't picking up the pkg-config paths for gmp.

Expected behavior

The python3 -m pip install -e ".[dev]" command completes successfully if the dependencies are installed.

Actual behavior

For some reason the cmake files or the build files for fastecdsa are not picking up the pkg-config include flags. The error shows that it's running the following command:

clang -fno-strict-overflow -Wsign-compare -Wunreachable-code \
    -fno-common -dynamic -DNDEBUG -g -O3 -Wall -Isrc/ \
    -I/Users/paperaviation/py-libp2p/venv/include \
    -I/opt/homebrew/opt/python@3.13/Frameworks/Python.framework/Versions/3.13/include/python3.13 \
    -c src/curve.c -o build/temp.macosx-15.0-arm64-cpython-313/src/curve.o -O2


      In file included from src/curve.c:1:
      src/curve.h:4:10: fatal error: 'gmp.h' file not found
          4 | #include "gmp.h"
            |          ^~~~~~~
      1 error generated.
      error: command '/usr/bin/clang' failed with exit code 1

Relevant log output

N/A

Possible Solution

I was able to get it to build though by manually adding in the CFLAGS and LDFLAGS like so:

% CFLAGS="`pkg-config --cflags gmp`" LDFLAGS="`pkg-config --libs gmp`" python3 -m pip install -e ".[dev]"

I'm not sure what the fix is other than to do it the hard way.

Environment

Python version:
3.13.1 (main, Dec  3 2024, 17:59:52) [Clang 16.0.0 (clang-1600.0.26.4)]

Operating System: macOS-15.3.1-arm64-arm-64bit-Mach-O

python -m pip freeze result:
alabaster==1.0.0
annotated-types==0.7.0
anyio==1.4.0
asn1crypto==1.5.1
asttokens==3.0.0
async-exit-stack==1.0.1
async-generator==1.10
attrs==25.1.0
babel==2.17.0
base58==2.1.1
bracex==2.5.post1
build==1.2.2.post1
bump-my-version==0.32.2
cachetools==5.5.2
certifi==2025.1.31
cffi==1.17.1
cfgv==3.4.0
chardet==5.2.0
charset-normalizer==3.4.1
click==8.1.8
coincurve==20.0.0
colorama==0.4.6
cryptography==44.0.1
cytoolz==1.0.1
decorator==5.2.1
distlib==0.3.9
docutils==0.21.2
eth-hash==0.7.1
eth-typing==5.2.0
eth-utils==5.2.0
execnet==2.1.1
executing==2.2.0
factory-boy==2.12.0
Faker==36.1.1
fastecdsa==1.7.5
filelock==3.17.0
h11==0.14.0
httpcore==1.0.7
httpx==0.28.1
id==1.5.0
identify==2.6.8
idna==3.10
imagesize==1.4.1
importlib_metadata==8.6.1
iniconfig==2.0.0
ipython==8.32.0
jaraco.classes==3.4.0
jaraco.context==6.0.1
jaraco.functools==4.1.0
jedi==0.19.2
Jinja2==3.1.5
keyring==25.6.0
-e git+https://github.com/libp2p/py-libp2p@d7eab27564fbc104bd862a678088a4facf7cdb80#egg=libp2p
lru-dict==1.3.0
markdown-it-py==3.0.0
MarkupSafe==3.0.2
matplotlib-inline==0.1.7
mdurl==0.1.2
more-itertools==10.6.0
multiaddr==0.0.9
mypy==1.10.0
mypy-extensions==1.0.0
mypy-protobuf==3.6.0
netaddr==1.3.0
nh3==0.2.20
nodeenv==1.9.1
noiseprotocol==0.3.1
outcome==1.3.0.post0
p2pclient==0.2.0
packaging==24.2
parso==0.8.4
pexpect==4.9.0
platformdirs==4.3.6
pluggy==1.5.0
pre_commit==4.1.0
prompt_toolkit==3.0.50
protobuf==5.29.3
ptyprocess==0.7.0
pure_eval==0.2.3
pycparser==2.22
pycryptodome==3.21.0
pydantic==2.10.6
pydantic-settings==2.8.0
pydantic_core==2.27.2
Pygments==2.19.1
pymultihash==0.8.2
PyNaCl==1.5.0
pyproject-api==1.9.0
pyproject_hooks==1.2.0
pytest==8.3.4
pytest-trio==0.8.0
pytest-xdist==3.6.1
python-dotenv==1.0.1
PyYAML==6.0.2
questionary==2.1.0
readme_renderer==44.0
requests==2.32.3
requests-toolbelt==1.0.0
rfc3986==2.0.0
rich==13.9.4
rich-click==1.8.6
roman-numerals-py==3.1.0
rpcudp==5.0.0
six==1.17.0
sniffio==1.3.1
snowballstemmer==2.2.0
sortedcontainers==2.4.0
Sphinx==8.2.1
sphinx-rtd-theme==3.0.2
sphinxcontrib-applehelp==2.0.0
sphinxcontrib-devhelp==2.0.0
sphinxcontrib-htmlhelp==2.1.0
sphinxcontrib-jquery==4.1
sphinxcontrib-jsmath==1.0.1
sphinxcontrib-qthelp==2.0.0
sphinxcontrib-serializinghtml==2.0.0
stack-data==0.6.3
tomlkit==0.13.2
toolz==1.0.0
towncrier==24.8.0
tox==4.24.1
traitlets==5.14.3
trio==0.29.0
trio-typing==0.10.0
twine==6.1.0
types-protobuf==5.29.1.20250208
typing_extensions==4.12.2
tzdata==2025.1
u-msgpack-python==2.8.0
urllib3==2.3.0
varint==1.0.2
virtualenv==20.29.2
wcmatch==10.0
wcwidth==0.2.13
wheel==0.45.1
zipp==3.21.0

Would you like to work on fixing this bug ?

Maybe