On Windows 7, when trying to compile pygraphviz, I run python setup.py build -c

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Asked: June 15, 20262026-06-15T18:51:12+00:00 2026-06-15T18:51:12+00:00

On Windows 7, when trying to compile pygraphviz, I run python setup.py build -c

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On Windows 7, when trying to compile pygraphviz, I run

    python setup.py build -c mingw32

I get

C:\MinGW\bin\gcc.exe -mno-cygwin -mdll -O -Wall “-IC:\Program Files (x86)\Graphv
iz 2.28\include\graphviz” -Ic:\Python27\include -Ic:\Python27\PC -c pygraphviz/g
raphviz_wrap.c -o build\temp.win-amd64-2.7\Release\pygraphviz\graphviz_wrap.o
cc1.exe: error: unrecognized command line option ‘-mno-cygwin’
error: command ‘gcc’ failed with exit status 1

Where is that ‘-mno-cygwin’ coming from? Greping through the pygraphviz-1.1 directory shows no occurences of “no-cygwin”.