https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107739
Bug ID: 107739 Summary: --enable-languages= duplicates yield odd error Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: aldot at gcc dot gnu.org Target Milestone: --- Mere cosmetics, but the error is contradicting it's own hint in a confusing way. $ ../../src/gcc-13.mine/configure --enable-languages=c++,lto,lto configure: error: The following requested languages could not be built: lto Supported languages are: c,c,c++,fortran,go,lto,objc,obj-c++ or other dups like $ ../../src/gcc-13.mine/configure --enable-languages=c++,c++,lto configure: error: The following requested languages could not be built: c++ Supported languages are: c,c,c++,fortran,go,lto,objc,obj-c++ I'm not sure why duplicates are not ignored silently.