Kbuild, lto: Handle basic LTO in modpost
- Don't warn about LTO marker symbols. modpost runs before the linker, so the module is not necessarily LTOed yet. - Don't complain about .gnu.lto* sections Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1391846481-31491-13-git-send-email-ak@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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@ -623,7 +623,10 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
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switch (sym->st_shndx) {
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case SHN_COMMON:
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warn("\"%s\" [%s] is COMMON symbol\n", symname, mod->name);
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if (!strncmp(symname, "__gnu_lto_", sizeof("__gnu_lto_")-1)) {
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/* Should warn here, but modpost runs before the linker */
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} else
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warn("\"%s\" [%s] is COMMON symbol\n", symname, mod->name);
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break;
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case SHN_UNDEF:
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/* undefined symbol */
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@ -849,6 +852,7 @@ static const char *section_white_list[] =
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".xt.lit", /* xtensa */
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".arcextmap*", /* arc */
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".gnu.linkonce.arcext*", /* arc : modules */
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".gnu.lto*",
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NULL
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};
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