sci-mathematics/singular[emacs] Emacs version too low

[Alessandro-Barbieri]

 * Messages for package sci-mathematics/singular-4.1.1_p2-r3:                                                          
 * Log file: /var/log/portage/build/sci-mathematics/singular-4.1.1_p2-r3:20210424-214658.log                           

 * ERROR: sci-mathematics/singular-4.1.1_p2-r3::sage-on-gentoo failed (setup phase):                                   
 *   Emacs version too low                                                                                             
 *                                                                                                                     
 * Call stack:                                                                                                         
 *                     ebuild.sh, line 125:  Called pkg_setup                                                          
 *   singular-4.1.1_p2-r3.ebuild, line  50:  Called die                                                                
 * The specific snippet of code:                                                                                                                                                                                                              
 *              elisp-need-emacs 22 || die "Emacs version too low"                                                     
 * 
 * If you need support, post the output of `emerge --info '=sci-mathematics/singular-4.1.1_p2-r3::sage-on-gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sci-mathematics/singular-4.1.1_p2-r3::sage-on-gentoo'`.
 * The complete build log is located at '/var/log/portage/build/sci-mathematics/singular-4.1.1_p2-r3:20210424-214658.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/sci-mathematics/singular-4.1.1_p2-r3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sci-mathematics/singular-4.1.1_p2-r3/temp/die.env'.
 * Working directory: '/var/tmp/portage/sci-mathematics/singular-4.1.1_p2-r3/homedir'
 * S: '/var/tmp/portage/sci-mathematics/singular-4.1.1_p2-r3/work/singular-4.1.1'

[kiwifb]

You have emacs 18 I presume. I honestly thought it had left portage by now. Anyway, I did the right things by the eclass as far as I can see, although there is a small discrepancy in version number that should be corrected. As far as I can see, for things to get to this stage you need to have emacs-18 and at least one emacs-23+ to be installed and emacs-18 to be selected as your default emacs. The eclass does exactly what it says it does on the manpage https://devmanual.gentoo.org/eclass-reference/elisp-common.eclass/index.html do you want another wording for the message?

[Alessandro-Barbieri]

I only have emacs 27 installed. I've re-selected emacs to the only version I have and now I'm re-emerging singular

[kiwifb]

Looking at the manpage again, it seems the eclass shifted since I wrote the ebuild. So some migration is needed. Your problem is likely due to the change in the eclass. Michael fixed it when he migrated the last version to the main tree but didn't warn me. Can you quickly check that 4.2.0_p1 from the main tree install correctly for you?

[Alessandro-Barbieri]

singular[emacs]::gentoo installed fine

[kiwifb]

OK, I just backported the main tree fix. It should work once you synced the overlay.

[Alessandro-Barbieri]

Thanks