[Bug lto/63603] New: [4.9/5 Regression] Linking with -fno-lto still invokes LTO

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63603

            Bug ID: 63603
           Summary: [4.9/5 Regression] Linking with -fno-lto still invokes
                    LTO
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org

Running

  echo "int main() {return 0;}" >  foo.c
  gcc -flto -ffat-lto-objects -c foo.c
  gcc -v -fno-lto foo.o 2>&1|grep lto1

shows that the -fno-lto is ignored for linking as lto1 is always invoked with
GCC 4.9 and 5.

Using GCC 4.8, LTO is not automatically invoked for linking but has to be
passed manually. Hence, it works there.