Compiler error installing python-igraph: Warnings treated as errors

问题

Trying to install python-igraph with pip for Python 3, I get the following compiler error. Can I change something or is this a bug in igraph? Note the line cc1: some warnings being treated as errors in the end - if they are just warnings, can I just ignore them somehow?

Extracting igraph-0.7.0.tar.gz...

Configuring igraph...

Build type: static extension

Include path: igraphcore/include

Library path: igraphcore/lib /usr/local/lib64 /usr/local/lib /usr/lib64 /usr/lib /lib64 /lib

Linked dynamic libraries: xml2 z m stdc++

Linked static libraries: igraphcore/lib/libigraph.a

Extra compiler options:

Extra linker options:

building 'igraph._igraph' extension

creating build/temp.linux-x86_64-3.4

creating build/temp.linux-x86_64-3.4/src

gcc -pthread -Wno-unused-result -Werror=declaration-after-statement -DNDEBUG -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -DOPENSSL_LOAD_CONF -fPIC -Iigraphcore/include -I../../build/include -I../../include -I/usr/local/include/igraph -I/usr/include/igraph -I/usr/include/python3.4m -c src/edgeobject.c -o build/temp.linux-x86_64-3.4/src/edgeobject.o

gcc -pthread -Wno-unused-result -Werror=declaration-after-statement -DNDEBUG -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -DOPENSSL_LOAD_CONF -fPIC -Iigraphcore/include -I../../build/include -I../../include -I/usr/local/include/igraph -I/usr/include/igraph -I/usr/include/python3.4m -c src/igraphmodule.c -o build/temp.linux-x86_64-3.4/src/igraphmodule.o

gcc -pthread -Wno-unused-result -Werror=declaration-after-statement -DNDEBUG -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -DOPENSSL_LOAD_CONF -fPIC -Iigraphcore/include -I../../build/include -I../../include -I/usr/local/include/igraph -I/usr/include/igraph -I/usr/include/python3.4m -c src/edgeseqobject.c -o build/temp.linux-x86_64-3.4/src/edgeseqobject.o

gcc -pthread -Wno-unused-result -Werror=declaration-after-statement -DNDEBUG -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -DOPENSSL_LOAD_CONF -fPIC -Iigraphcore/include -I../../build/include -I../../include -I/usr/local/include/igraph -I/usr/include/igraph -I/usr/include/python3.4m -c src/filehandle.c -o build/temp.linux-x86_64-3.4/src/filehandle.o

src/filehandle.c: In function ‘igraphmodule_filehandle_init’:

src/filehandle.c:38:5: error: ISO C90 forbids mixed declarations and code [-Werror=declaration-after-statement]

cc1: some warnings being treated as errors

error: command 'gcc' failed with exit status 1

----------------------------------------
Cleaning up...
Command /usr/bin/python3 -c "import setuptools, tokenize;__file__='/export/tmp/pip_build_root/python-igraph/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-o27hxbqk-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /export/tmp/pip_build_root/python-igraph
Storing debug log for failure in /root/.pip/pip.log

回答1:

This has recently been patched in igraph; see the corresponding issue on Github.

来源：https://stackoverflow.com/questions/26117722/compiler-error-installing-python-igraph-warnings-treated-as-errors