Should be, although some versions of the linker don't gc-sections hard enough, so you wind up with functions that never get called in your libnss3.so. If the toolchain's linker has that bug, you won't see any win from it. See:
https://sourceware.org/bugzilla/show_bug.cgi?id=12975 https://bugzilla.mozilla.org/show_bug.cgi?id=1028781 -Nathan ----- Original Message ----- > Is #1 something we can backport to b2g-2.0? > > - Kyle > > On Fri, Jun 27, 2014 at 8:56 AM, Nathan Froyd <froy...@mozilla.com> wrote: > > Hi all, > > > > Two changes to how NSS is built for Firefox's purposes have landed > > recently: > > > > 1. Bug 1018375 changed our build process on Android/B2G such that the > > libnss3.so that we build there now has proper symbol exports applied to > > it. This change enables the linker to discard any functions and/or data > > that aren't used by the exported API from the final libnss3.so. Initial > > size reduction results were very encouraging; about ~10% reduction in the > > on-disk size, ~18% reduction of the uncompressed in-memory size. > > > > 2. Bug 1025998 changed our NSS build such that we now maintain a custom > > list of the symbols required to build Firefox and its subset of NSS. This > > list is only used for some platforms; for all others, the normal > > NSS-provided list of exported symbols is used. If you are using new > > symbols from NSS, either from C++ or through ctypes, you need to ensure > > that the symbols you wish to use are present in security/build/nss.def. > > (They also need to be present in NSS's list, of course, or you'll break > > the build.) > > > > The intent of the second change is to eventually cut down on the size of > > the NSS API surface that we ship in Firefox, thus reducing the size of the > > NSS libraries that we ship as well. The tracking bug for this effort is > > bug 611781. > > > > -Nathan > > _______________________________________________ > > dev-platform mailing list > > dev-platform@lists.mozilla.org > > https://lists.mozilla.org/listinfo/dev-platform > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
