gfortran spkg-configure: Reject versions >= 10

[mkoeppe]

(from https://groups.google.com/d/msg/sage-devel/OXOmOjlYQLo/7gOLtzsJCQAJ)

We already reject gcc 10, but if gfortran is installed separately, we also have to check that version.

We also check for gfortran-9 first, and on homebrew, we recommend installing it via brew install gcc@9.

CC: @dimpase @dwbump @orlitzky @jhpalmieri @kiwifb

Component: porting

Author: Matthias Koeppe

Branch: f6b123f

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/30067

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1 +1,3 @@
+(from https://groups.google.com/d/msg/sage-devel/OXOmOjlYQLo/7gOLtzsJCQAJ)
+
 We already reject gcc 10, but if gfortran is installed separately, we also have to check that version.

[dimpase]

comment:3

just make sure it is possible to override with

./configure --with-gfortran=

hmm, should it be with

./configure FC=

I am confused here

[mkoeppe]

comment:4

It can be overridden by ./configure --without-system-gfortran.

[slel]

comment:5

If Homebrew is detected, should we check for gfortran-9
and recommend installing it via brew install gcc@9?

[mkoeppe]

comment:6

I hope that we can get #29456 working...

[mkoeppe]

Branch: u/mkoeppe/gfortran_spkg_configure__reject_versions____10

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,3 +1,8 @@
 (from https://groups.google.com/d/msg/sage-devel/OXOmOjlYQLo/7gOLtzsJCQAJ)
 
 We already reject gcc 10, but if gfortran is installed separately, we also have to check that version.
+
+We also check for `gfortran-9` first, and on `homebrew`, we recommend installing it via `brew install gcc@9`.
+
+
+

[mkoeppe]

Commit: 2ee7c31

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

New commits:

4e42135	build/pkgs/gfortran/distros/homebrew.txt: Use gcc@9
f018e63	configure.ac: Search for gfortran-9 first
2ee7c31	build/pkgs/gfortran/spkg-configure.m4: Check gfortran version, reject too old and too new versions

[dimpase]

comment:9

where is the list

AC_PROG_FC([gfortran-9 gfortran g95 xlf95 f95 fort ifort ifc efc pgfortran pgf95 lf95 ftn nagfor xlf90 f90 pgf90 pghpf epcf90 g77 xlf f77 frt pgf77 cf77 fort77 fl32 af77])

coming from? I know that Sage sort of works with flang, which is not on the list -not sure if g95 and other old stuff listed still works...

[mkoeppe]

comment:10

I put "gfortran-9" in front of the autoconf 2.69 default

[dimpase]

comment:11

by the way, a new Autotools beta version has been released, they promise 2.70 in 3 months. Time to submit bugs we know?

[orlitzky]

comment:12

Replying to @dimpase:

by the way, a new Autotools beta version has been released, they promise 2.70 in 3 months. Time to submit bugs we know?

Once the beta is available in Gentoo (https://bugs.gentoo.org/732648) I'll start building sage with it to make sure there are no new problems.

[sagetrac-git]

Changed commit from 2ee7c31 to f6b123f