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Hi! I want to use R for network analysis and have tried to install the 'igraph' package. Unfortunately, the installation is aborted by an error: --snip-- gcc -std=gnu99 -I/usr/lib64/R/include -DNDEBUG -I/usr/local/include -DUSING_R -I. -Ics -Iglpk -Iglpk/amd -Iglpk/colamd -I/usr/local/include -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -DNDEBUG -DPACKAGE_VERSION=\"0.6\" -DINTERNAL_ARPACK -DIGRAPH_THREAD_LOCAL=/**/ -fpic -fmessage-length=0 -O2 -Wall -D_FORTI...

...from /usr/include/string.h:634:0, from src/foreign-gml-parser.y:54: /usr/include/bits/string2.h:208:0: note: this is the location of the previous definition # define strdup(s) __strdup (s) gcc -m64 -I/usr/include/R -DNDEBUG -I/usr/local/include -DUSING_R -I. -Iinclude -Ics -Iglpk -Iplfit -ICHOLMOD/Include -IAMD/Include -ICOLAMD/Include -ISuiteSparse_config -I/usr/local/include -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1...

...> from src/foreign-gml-parser.y:54: > /usr/include/bits/string2.h:208:0: note: this is the location of the > previous definition > # define strdup(s) __strdup (s) > > gcc -m64 -I/usr/include/R -DNDEBUG -I/usr/local/include -DUSING_R > -I. -Iinclude -Ics -Iglpk -Iplfit -ICHOLMOD/Include -IAMD/Include > -ICOLAMD/Include -ISuiteSparse_config -I/usr/local/include -O2 -g > -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 > -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 > -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/...

Dear All, I am trying to install igraph package but getting the following error: ------------------ make: *** [/usr/lib64/R/etc/Makeconf:159: foreign-graphml.o] Error 1 ERROR: compilation failed for package ?igraph? * removing ?/usr/lib64/R/library/igraph? ------------------ Any ideas? Thanks in advance, Paul