[bug #68485] Configure system fails to detect flang Fortran compiler

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Update of bug #68485 (group octave):=0A=0A                  Status:        =
            None =3D> Invalid / Not an Octave=0ABug=0A             Open/Clo=
sed:                    Open =3D> Closed=0A=0A    _________________________=
______________________________=0A=0AFollow-up Comment #1:=0A=0AOctave's bui=
ld system is based on autotools.=0AAs soon as better support for LLVM Flang=
 has been added to upstream autoconf,=0Athis will be working more seamlessl=
y for Octave. Until then, you'll need to=0Aset `F77` accordingly (like you =
already wrote).=0A=0AMSYS2 applies patches on top of the upstream autotools=
 to improve its support=0Afor LLVM Flang. E.g.,=0Ahttps://github.com/msys2/=
MSYS2-packages/blob/6b9dae32c7985e757ed6e84fcb988ebbf5375941/autoconf2.73/0=
004-LLVM-Flang.patch=0A=0AMaybe, Gentoo could do something similar.=0A=0AIf=
 it does, you'd need to run `autoreconf -fi` in the source tree of Octave t=
o=0Aget the updated autoconf scripts.=0A=0AAll in all, there isn't much tha=
t Octave could (or should) do at the moment=0Awhen it comes to this.=0A=0AI=
'll close this as "not an Octave bug" because any change needs to be done i=
n=0Aupstream tools.=0APlease, let us know if there is actually a bug in Oct=
ave when it comes to=0Athis, and we can re-open.=0A=0A=0A=0A    ___________=
____________________________________________=0A=0AReply to this item at:=0A=
=0A  <https://savannah.gnu.org/bugs/?68485>=0A=0A__________________________=
_____________________=0AMessage sent via Savannah=0Ahttps://savannah.gnu.or=
g/=0A
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