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Failure to build with Python 3.9.0 on macOS

See original GitHub issue

While rebuilding packages with Python 3.9.0 on macOS Homebrew (https://github.com/Homebrew/homebrew-core/pull/62560), we are seeing a failure to build scipy 1.5.2.

Reproducing code example:

/usr/local/opt/python@3.9/bin/python3 setup.py build --fcompiler=gnu95

Error message:

scipy/sparse/linalg/dsolve/SuperLU/SRC/clacon2.c:175:5: error: implicit declaration of function 'ccopy_' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
scipy/sparse/linalg/dsolve/SuperLU/SRC/dmach.c:62:9: error: implicitly declaring library function 'strncmp' with type 'int (const char *, const char *, unsigned long)' [-Werror,-Wimplicit-function-declaration]
scipy/sparse/linalg/dsolve/SuperLU/SRC/ilu_cdrop_row.c:196:3: error: implicit declaration of function 'scopy_' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
scipy/sparse/linalg/dsolve/SuperLU/SRC/ilu_zdrop_row.c:196:3: error: implicit declaration of function 'dcopy_' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
scipy/sparse/linalg/dsolve/SuperLU/SRC/smach.c:62:9: error: implicitly declaring library function 'strncmp' with type 'int (const char *, const char *, unsigned long)' [-Werror,-Wimplicit-function-declaration]
scipy/sparse/linalg/dsolve/SuperLU/SRC/zlacon2.c:175:5: error: implicit declaration of function 'zcopy_' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
scipy/sparse/linalg/dsolve/SuperLU/SRC/slacon2.c:160:16: error: implicit declaration of function 'idamax_' is invalid in C99 [-Werror,-Wimplicit-function-declaration]

Issue Analytics

State:
Created 3 years ago
Reactions:3
Comments:17 (11 by maintainers)

Top GitHub Comments

16reactions

blandinwcommented, Oct 26, 2020

This worked for me:

CFLAGS=-Wno-error=implicit-function-declaration pip3 install scipy

1reaction

eirnymcommented, Oct 27, 2020

CFLAGS=-Wno-error=implicit-function-declaration pip3 install scipy

However it’s better to have a proper solution such as an inclusion of proper headers without this requirement of this hack

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