sagemathgh-41186: Fix meson build on Ubuntu 24.04
    
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Fix the meson build on Ubuntu 24.04 by:
- Changing the flint subproject to use cmake (which is offically only
supported on windows, but seems to work well also on Ubuntu)
- Add a check for the pari version (because the older ubuntu only comes
with 2.15.4, against which sage doesn't actually compile)

### 📝 Checklist

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- [ ] The title is concise and informative.
- [ ] The description explains in detail what this PR is about.
- [ ] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

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URL: sagemath#41186
Reported by: Tobias Diez
Reviewer(s):

Author: Release Manager

.github/workflows/ci.yml

@@ -27,8 +27,8 @@ jobs:
           - debian:forky
           - ghcr.io/void-linux/void-glibc-full
           - archlinux
-          #- ubuntu:22.04 - fails due to issue with cypari2
-          #- ubuntu:24.04 - fails due to issue with cypari2
+          #- ubuntu:22.04 - gap is outdated there (only 4.11)
+          - ubuntu:24.04
           - ubuntu:25.04
     container:
       image: ${{ matrix.container }}
@@ -47,6 +47,10 @@ jobs:
             # but we need the maxima help to be in place
             sed -i '/^NoExtract/d' /etc/pacman.conf
           fi
+          if [ "${{ matrix.container }}" = "ubuntu:22.04" ]; then
+            apt-get update
+            apt-get install -y git
+          fi
 
       - name: Checkout code
         # cannot use v4 yet because of https://github.com/actions/checkout/issues/1487

build/bin/sage-print-system-package-command

@@ -153,7 +153,7 @@ case $system:$command in
         fi
         ;;
     @(fedora*|redhat*|centos*):install)
-        [ "$YES" = yes ] && options="$options -y"
+        [ "$YES" = yes ] && options="$options -y --allowerasing"
         [ "$IGNORE_MISSING" = yes ] && options="$options --skip-unavailable"
         [ -n "$system_packages" ] && print_shell_command ${SUDO}dnf install $options $system_packages
         ;;

meson.build

@@ -4,7 +4,7 @@ project(
   version: files('VERSION.txt'),
   license: 'GPL v3',
   default_options: ['c_std=c17', 'cpp_std=c++17', 'python.install_env=auto'],
-  meson_version: '>=1.2',
+  meson_version: '>=1.5',
 )
 
 # Python module

src/meson.build

@@ -87,6 +87,32 @@ except Exception:
 endif
 # Cannot be found via pkg-config
 pari = cc.find_library('pari', required: not is_windows, disabler: true)
+if pari.found() and not meson.is_cross_build()
+  # Verify PARI version
+  pari_version_code = '''
+  #include <stdio.h>
+  #include <pari/pari.h>
+  int main(void) {
+    pari_init(1000000, 2);
+    GEN v = pari_version(), M = gel(v,1), m = gel(v,2), p = gel(v,3);
+    printf("%ld.%ld.%ld", itos(M), itos(m), itos(p));
+    pari_close();
+    return 0;
+  }
+  '''
+  pari_version = cc.run(
+    pari_version_code,
+    args: ['-v'],
+    name: 'pari version',
+    dependencies: [pari],
+    required: true,
+  ).stdout().strip()
+  if pari_version.version_compare('<=2.17.0')
+    message('PARI version > 2.17.0 required, found ' + pari_version)
+    pari = disabler()
+  endif
+endif
+
 
 mpfr = dependency('mpfr')
 

subprojects/flint.wrap

@@ -3,6 +3,8 @@ url = https://github.com/flintlib/flint.git
 revision = main
 depth = 1
 patch_directory = flint
+diff_files = flint/cmakelinux.patch
+method = cmake
 
 [provide]
-dependency_names = flint
+flint = flint_dep

subprojects/packagefiles/flint/cmakelinux.patch

@@ -0,0 +1,15 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 8d959fb..5dcbf6e 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -12,10 +12,6 @@
+ 
+ cmake_minimum_required(VERSION 3.22)
+ 
+-if(NOT WIN32)
+-    message(FATAL_ERROR "Detected system is not Windows.  Please use the Autotools configuration along with the Makefile instead as it is more up-to-date.  Read INSTALL.md.")
+-endif()
+-
+ include(CheckCCompilerFlag)
+ include(CheckCSourceRuns)
+ include(CheckIPOSupported)