I recently tried building libreoffice 5.0.2 with debug symbols and 5GB of tmp space. Emerge warm me needing at least 6GB. Well, creating 12GB is INSUFFICIENT! Libreoffice (at least with symbols) requires more than 21GB of space. Regards.
commit 34e546f17994826f0c52c5b82ada29a7ed5426df (HEAD -> master, origin/master, origin/HEAD) Author: Andreas K. Hüttel <dilfridge@gentoo.org> Date: Fri Mar 25 21:46:14 2016 +0100 app-office/libreoffice: Check for more disk space if building with debug info, bug 563286 Package-Manager: portage-2.2.28 app-office/libreoffice/libreoffice-5.1.1.3.ebuild | 7 ++++++- app-office/libreoffice/libreoffice-5.1.9999.ebuild | 7 ++++++- app-office/libreoffice/libreoffice-9999.ebuild | 7 ++++++- 3 files changed, 18 insertions(+), 3 deletions(-)