Fix gap_packages for gcc 10

[mkoeppe]

The optional package gap_packages fails to build on various platforms (https://github.com/sagemath/sage/actions/runs/281307759):
ubuntu-trusty, debian-bullseye, debian-sid, linuxmint-17.

We add patches extracted from the GAP/libsemigroup update ticket #29314 (which may not be ready for Sage 9.2)

CC: @dimpase @jhpalmieri @soehms @vbraun

Component: packages: optional

Author: Dima Pasechnik, Matthias Koeppe

Branch/Commit: f89dc20

Reviewer: Matthias Koeppe, Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/30720

[mkoeppe]

Branch: u/mkoeppe/fix_gap_packages_for_gcc_10__xcode_12

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1 +1,2 @@
+We add patches extracted from the GAP/libsemigroup update ticket #29314.
 

[mkoeppe]

Commit: f89dc20

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

New commits:

c26eb00	fix cohomolo pkg code to allow build with gcc10
102946d	build/pkgs/gap_packages/patches/cohomolo-gcc10.patch: Backport
2c30b34	clang 12 (macOS XCode 12) needs extra includes
f89dc20	build/pkgs/gap_packages/patches/guava_leon_includes.patch: Backport

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,2 +1,5 @@
-We add patches extracted from the GAP/libsemigroup update ticket #29314.
+The optional package `gap_packages` fails to build on various platforms (https://github.com/sagemath/sage/actions/runs/281307759):
+`ubuntu-trusty`, `debian-bullseye`, `debian-sid`, `linuxmint-17`.
 
+We add patches extracted from the GAP/libsemigroup update ticket #29314 (which may not be ready for Sage 9.2)
+

[sagetrac-git]

Changed commit from f89dc20 to b834ae6

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

b834ae6

.github/workflows/tox-{optional,experimental}.yml: Test with Xcode 12 too

[mkoeppe]

Reviewer: https://github.com/mkoeppe/sage/actions/runs/288417931

[mkoeppe]

Changed reviewer from https://github.com/mkoeppe/sage/actions/runs/288417931 to https://github.com/mkoeppe/sage/actions/runs/288422214

[jhpalmieri]

comment:7

Does this currently fail with Xcode 12? The summary mentions it but not the description.

[mkoeppe]

comment:8

It's what I have gathered from the tickets but I have not verified it myself. The GH Actions workflows prior to this ticket have only tested standard packages with Xcode 12, but not optional packages.

[dimpase]

Changed author from Matthias Koeppe to Matthias Koeppe, Dima Pasechnik

[mkoeppe]

comment:10

This seems to fix it for the gcc 10 platforms (for example debian-bullseye - https://github.com/mkoeppe/sage/runs/1206658827).

[mkoeppe]

comment:11

No results regarding Xcode 12 from GH Actions because the homebrew package installation fails and the build does not even start (https://github.com/mkoeppe/sage/runs/1206657776)

This would benefit from local testing on macOS with Xcode 12...