Re: [igraph] Compiler error installing python-igraph: Warnings treated as errors

[Tamas Nepusz]

Hello,

This has recently been patched; see the following issue on Github:

https://github.com/igraph/igraph/issues/679

-- 
T.

On 30 September 2014 at 12:11:36, Christian Staudt (address@hidden) wrote:

Hi igraph users,

I have problems installing python-igraph via pip for Python 3. At some point the compiler fails with:

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

Note the "cc1: some warnings being treated as errors“ - if a warning is the cause of the failed compilation, can this be switched off?

The error is also described here:

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

Can anyone help? Thank you

Christian

address@hidden

http://parco.iti.kit.edu/staudt/index-en.shtml

Institute of Theoretical Informatics - Parallel Computing Group 

Building 50.34 Room 034

Karlsruhe Institute of Technology (KIT)

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