On Fri, Jan 9, 2015 at 1:16 PM, Andrew Haley <a...@redhat.com> wrote: > On 01/09/2015 10:33 AM, Richard Biener wrote: >> On Thu, Jan 8, 2015 at 11:12 AM, Andrew Haley <a...@redhat.com> wrote: >>> Android native GCC can't support LTO because of a lack of support for >>> dlopen() in the C library. How should we patch the configury to disable >>> LTO by default? >> > >> How does LTO need dlopen? It seems it only cannot use the linker >> plugin > > That's right, it's the plugin which is causing the problem.
Building it, I suppose? Does --disable-lto-plugin work? Richard. >> in which case the existing check for plugin-supporting ld should >> catch it? > > It doesn't seem to. The problem is probably caused by > libfakechroot.so, which intercepts calls to dlopen() and tries to > forward them. Unfortunately dlopen() is not in Android's libc, so > libfakechroot returns a link error for dlopen(). I don't know what > the check for plugin-supporting ld does, but I guess it doesn't call > dlopen(). > > I'll grant you that this isn't really our bug: libfakechroot shouldn't > be exporting dlopen() on Android. > > Andrew.
