f098adac54
Whilst working on the Reproducible Builds[0] effort, we noticed that fontconfig generates unreproducible cache files. This is due to fc-cache uses the modification timestamps of each directory in the "checksum" and "checksum_nano" members of the _FcCache struct. This is so that it can identify which cache files are valid and/or require regeneration. This patch changes the behaviour of the checksum calculations to prefer the value of the SOURCE_DATE_EPOCH[1] environment variable over the directory's own mtime. This variable can then be exported by build systems to ensure reproducible output. If SOURCE_DATE_EPOCH is not set or is newer than the mtime of the directory, the existing behaviour is unchanged. This work was sponsored by Tails[2]. [0] https://reproducible-builds.org/ [1] https://reproducible-builds.org/specs/source-date-epoch/ [2] https://tails.boum.org/ |
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| .. | ||
| Makefile.am | ||
| check-missing-doc | ||
| confdir.sgml.in | ||
| edit-sgml.c | ||
| fcatomic.fncs | ||
| fcblanks.fncs | ||
| fccache.fncs | ||
| fccharset.fncs | ||
| fcconfig.fncs | ||
| fcconstant.fncs | ||
| fcdircache.fncs | ||
| fcfile.fncs | ||
| fcfontset.fncs | ||
| fcformat.fncs | ||
| fcfreetype.fncs | ||
| fcinit.fncs | ||
| fclangset.fncs | ||
| fcmatrix.fncs | ||
| fcobjectset.fncs | ||
| fcobjecttype.fncs | ||
| fcpattern.fncs | ||
| fcrange.fncs | ||
| fcstring.fncs | ||
| fcstrset.fncs | ||
| fcvalue.fncs | ||
| fcweight.fncs | ||
| fontconfig-devel.sgml | ||
| fontconfig-user.sgml | ||
| func.sgml | ||
| version.sgml.in | ||