https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68794
Bug ID: 68794 Summary: an option for -fsanitize=<foo> is accepted even if the corresponding library is not available Product: gcc Version: 5.3.1 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: driver Assignee: unassigned at gcc dot gnu.org Reporter: doko at gcc dot gnu.org Target Milestone: --- [forwarded from https://bugs.debian.org/805422] an option for -fsanitize=<foo> is accepted even if the corresponding library is not available, e.g. undefined/ubsan on aarch64-linux-gnu. The compiler should warn when building, not only failing when linking. ... g++ -DDEBUG -g2 -O1 -std=c++03 -pipe -fsanitize=undefined -c fipsalgt.cpp g++ -DDEBUG -g2 -O1 -std=c++03 -pipe -fsanitize=undefined -c dlltest.cpp g++ -o cryptest.exe -DDEBUG -g2 -O1 -std=c++03 -pipe -fsanitize=undefined bench.o bench2.o test.o validat1.o validat2.o validat3.o adhoc.o datatest.o regtest.o fipsalgt.o dlltest.o ./libcryptopp.a -pthread /usr/bin/ld: cannot find -lubsan collect2: error: ld returned 1 exit status