[Bug 3836] New: [IcedTea8] Extra compiler flags not passed to adlc build

[bugzilla-daemon at icedtea.classpath.org]

https://icedtea.classpath.org/bugzilla/show_bug.cgi?id=3836

            Bug ID: 3836
           Summary: [IcedTea8] Extra compiler flags not passed to adlc
                    build
           Product: IcedTea
           Version: 3.x-hg
          Hardware: all
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: IcedTea
          Assignee: gnu.andrew at redhat.com
          Reporter: gnu.andrew at redhat.com
                CC: unassigned at icedtea.classpath.org

gmake[7]: ***
[/builddir/build/BUILD/icedtea-3.19.0/openjdk-boot/hotspot/make/linux/makefiles/adlc.make:220:
../generated/adfiles/adlparse.o] Error 1
gmake[7]: *** Waiting for unfinished jobs....
/builddir/build/BUILD/icedtea-3.19.0/openjdk-boot/hotspot/src/share/vm/adlc/arena.cpp:
In member function 'size_t Arena::used() const':
/builddir/build/BUILD/icedtea-3.19.0/openjdk-boot/hotspot/src/share/vm/adlc/arena.cpp:82:19:
error: ISO C++17 does not allow 'register' storage class specifier
[-Werror=register]
   82 |   register Chunk *k = _first;
      |                   ^
/builddir/build/BUILD/icedtea-3.19.0/openjdk-boot/hotspot/src/share/vm/adlc/arena.cpp:
In member function 'void* Arena::grow(size_t)':
/builddir/build/BUILD/icedtea-3.19.0/openjdk-boot/hotspot/src/share/vm/adlc/arena.cpp:96:19:
error: ISO C++17 does not allow 'register' storage class specifier
[-Werror=register]
   96 |   register Chunk *k = _chunk;   // Get filled-up chunk address
      |                   ^
cc1plus: all warnings being treated as errors

The build should be being passed -std=gnu++98 but this is not being used in the
ADLC makefiles. Thus, newer GCCs use their higher default (C++17 in this case).

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