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Diffstat (limited to 'tags/n/non-standard-file-perm.tag')
| -rw-r--r-- | tags/n/non-standard-file-perm.tag | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tags/n/non-standard-file-perm.tag b/tags/n/non-standard-file-perm.tag new file mode 100644 index 0000000..72465a6 --- /dev/null +++ b/tags/n/non-standard-file-perm.tag @@ -0,0 +1,32 @@ +Tag: non-standard-file-perm +Severity: warning +Check: files/permissions +Explanation: The file has a mode different from 0644. In some cases this is + intentional, but in other cases this is a bug. +See-Also: debian-policy 10.9 + +Screen: toolchain/gnat/ali-read-only +Advocates: Nicolas Boulenguez <nicolas@debian.org> +Reason: In GNAT, the compiler also deals with dependencies and rebuild order. + The <code>.ali</code> files contain the dependency information required to detect + if a <code>.o</code> is more recent than the closure of all sources it depends + upon, or if it should be rebuilt. + . + By convention, a read-only <code>.ali</code> file tells <code>GNAT</code> to fail if + the <code>.o</code> is obsolete or unavailable, instead of attempting to rebuild. + This is recommended for packaged libraries (the <code>.so</code> or <code>.a</code> + are available but not the <code>.o</code> files). + . + This convention may seem bizarre according to modern standards, but it + has been in use for 25 years, so Adacore would probably need a + compelling reason to break it. + . + See also Debian Policy 8.4, which explicitly requires this: + . + If the package provides Ada Library Information (<code>*.ali</code>) files for use + with <code>GNAT</code>, these files must be installed read-only (mode 0444) so that + <code>GNAT</code> will not attempt to recompile them. This overrides the normal + file mode requirements given in "Permissions and owners." +See-Also: + debian-policy 8.4, + Bug#986400 |