尝试使用pip为Python 3安装python-igraph，我收到以下编译器错误。我可以改变一些东西，或者这是igraph中的错误吗？最后注意行cc1: some warnings being treated as errors - 如果它们只是警告，我可以以某种方式忽略它们吗？
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