meson: Fix ccache issues when using precompiled headers with gcc Unfortunately the combination of gcc, precompiled headers, ccache and meson currently is not safe without further options. The dependencies emitted by gcc are insufficient to trigger rebuilds when headers "below" the precompiled headers are changed. Whether that's a ccache, gcc or meson bug is debatable. Luckily gcc's -fpch-deps option fixes the issue.
This problem occasionally leads to build failures, e.g. if only c.h, postgres.h or pg_config_manual.h change. That's e.g. the case when creating a new major version branch. Reviewed-by: Nazir Bilal Yavuz <[email protected]> Reviewed-by: Jelte Fennema-Nio <[email protected]> Discussion: https://postgr.es/m/CAN55FZ0tqR6Xz%3DiVFLc1BBoLOEHU775ARhcGYwggHA3XLA%3DoQg%40mail.gmail.com Discussion: https://postgr.es/m/ca+hukg+s7yvt0punsquejcjysv-7-51n9b1h468le3vji0x...@mail.gmail.com Discussion: https://postgr.es/m/phsrssp75npoyalqsolcd7fmnmlbzbmquc2p7w7mqjlw7432jk@bzskz3luyjvb Discussion: https://github.com/ccache/ccache/issues/1686 Backpatch-through: 16, where meson support was added Branch ------ REL_18_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/125893ce83b8218db8446f5f6f416cdbf9e80f7b Modified Files -------------- meson.build | 6 ++++++ 1 file changed, 6 insertions(+)
