https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105851
Bug ID: 105851 Summary: Error: "Duplicate key positions selected" when recreating cfns.h Product: gcc Version: 5.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: qcorba at gmail dot com Target Milestone: --- Below patch was applied to my gcc-5.3.0 build: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=ec1cc0263f156f70693a62cf17b254a0029f4852 I tried to recreate cfns.h using: $ gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L C++ cfns.gperf cfns.h But got error: Duplicate key positions selected It would be successful if the key is changed to '1-6,$'. Please check.