fedora-33-standard/homebrew-macos flint/arb breakage

[mkoeppe]

fedora-33-standard, https://github.com/sagemath/sage/runs/1235092189

1. configure finds system flint but not system arb (headers are installed by the fedora package in /usr/include/arb/, but the arb spkg-configure expects them in /usr/include).

2. Then compiling arb spkg results in:

  [arb-2.16.0.p0]   /sage/local/var/tmp/sage/build/arb-2.16.0.p0/src/fmpr.h:25:10: fatal error: flint/config.h: No such file or directory
  [arb-2.16.0.p0]      25 | #include "flint/config.h"
  [arb-2.16.0.p0]         |          ^~~~~~~~~~~~~~~~
  [arb-2.16.0.p0]   compilation terminated.

Indeed, /usr/include/flint/ is present, but config.h is missing.

For Sage 9.3, we can do the upgrade to arb 2.18.1 (#28623) and flint 2.6.3 (#29719). But we need a quick fix for Sage 9.2.

(fedora-33 is expected to be released 2020-10-20.)

Same error also on homebrew-macos with flint installed.

CC: @dimpase @jhpalmieri @orlitzky @fredrik-johansson @videlec @kiwifb @antonio-rojas

Component: build: configure

Author: Dima Pasechnik

Branch/Commit: 78edcc3

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/30757

[mkoeppe]

comment:6

Should the install location of the arb headers in Fedora be considered a packaging bug?

[orlitzky]

comment:7

Replying to @mkoeppe:

Should the install location of the arb headers in Fedora be considered a packaging bug?

Yes, any packager who relocates the public headers for their package has 100% broken its public API.

[mkoeppe]

Branch: u/mkoeppe/fedora_33_standard_homebrew_macos_flint_arb_breakage

[mkoeppe]

Commit: 78edcc3

[mkoeppe]

comment:9

To keep the scope limited this late in the 9.2 cycle, I have only cherry-picked a fix for arb from the #29719/#28623 branch

---

New commits:

78edcc3

backport flint compat patch from arb's trunk

[mkoeppe]

Author: Dima Pasechnik

[mkoeppe]

Reviewer: https://github.com/mkoeppe/sage/actions/runs/310014066

[mkoeppe]

Changed reviewer from https://github.com/mkoeppe/sage/actions/runs/310014066 to Matthias Koeppe

[vbraun]

Changed branch from u/mkoeppe/fedora_33_standard_homebrew_macos_flint_arb_breakage to 78edcc3