[Bug lto/64343] New: [5 Regression] lto compile options

[Joost.VandeVondele at mat dot ethz.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64343

            Bug ID: 64343
           Summary: [5 Regression] lto compile options
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Joost.VandeVondele at mat dot ethz.ch

somewhere between r218726 and r218773 (1day) code compiled & linked with

FCFLAGS  = -flto=jobserver -ffree-form -cpp 
LDFLAGS  = $(FCFLAGS) -O3 -funroll-loops -ffast-math -march=native
-fuse-linker-plugin -flto=jobserver 

seems to remain in unoptimized form, while previously they would be optimized
at -O3. It does now seem like the compile time flags and not the ld flags
control the optimization level of the binary.