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| author | Eric S. Raymond <esr@thyrsus.com> | 2011-03-26 10:42:03 -0400 |
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| committer | Eric S. Raymond <esr@thyrsus.com> | 2011-03-26 10:42:03 -0400 |
| commit | 749f86a7b107c7ec08f1e9065ffb6bd83abc7db3 (patch) | |
| tree | d0bdb168f28717fb664ea11f5352b8959e07d7b3 /www | |
| parent | 3dedf8c9c56a65e99e2abb58b9e3dedb3e6dffd0 (diff) | |
| download | gpsd-749f86a7b107c7ec08f1e9065ffb6bd83abc7db3.tar.gz | |
Plant warnings about odd memcpy() implementations.
Diffstat (limited to 'www')
| -rw-r--r-- | www/hacking.html | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/www/hacking.html b/www/hacking.html index 0c9d858d..132a25e2 100644 --- a/www/hacking.html +++ b/www/hacking.html @@ -567,6 +567,11 @@ typedefs.</p> <p>(No, we don't know why splint doesn't handle these natively.)</p> +<p>If you are porting to GCC on x64 Atom or any other compiler/machine +combination where you suspect memcpy(3) might be implemented by +reverse rather than forward copy, it may screw up the shared-memory +export. Read the comment about this in libgps_shm.c and beware.</p> + <h2 id="architecture">Architecture and how to hack it</h2> <p>There are two useful ways to think about the GPSD architecture. |