tools headers UAPI: Sync openat2.h with the kernel sources

[linux-2.6-microblaze.git] / scripts / Makefile.modpost

diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index f54b6ac..066beff 100644 (file)
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -43,6 +43,9 @@ __modpost:
 include include/config/auto.conf
 include scripts/Kbuild.include
 
+# for ld_flags
+include scripts/Makefile.lib
+
 MODPOST = scripts/mod/modpost                                                          \
        $(if $(CONFIG_MODVERSIONS),-m)                                                  \
        $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a)                                        \
@@ -102,12 +105,30 @@ $(input-symdump):
        @echo >&2 'WARNING: Symbol version dump "$@" is missing.'
        @echo >&2 '         Modules may not have dependencies or modversions.'
 
+ifdef CONFIG_LTO_CLANG
+# With CONFIG_LTO_CLANG, .o files might be LLVM bitcode, so we need to run
+# LTO to compile them into native code before running modpost
+prelink-ext := .lto
+
+quiet_cmd_cc_lto_link_modules = LTO [M] $@
+cmd_cc_lto_link_modules =                                              \
+       $(LD) $(ld_flags) -r -o $@                                      \
+               $(shell [ -s $(@:.lto.o=.o.symversions) ] &&            \
+                       echo -T $(@:.lto.o=.o.symversions))             \
+               --whole-archive $^
+
+%.lto.o: %.o
+       $(call if_changed,cc_lto_link_modules)
+endif
+
+modules := $(sort $(shell cat $(MODORDER)))
+
 # Read out modules.order to pass in modpost.
 # Otherwise, allmodconfig would fail with "Argument list too long".
 quiet_cmd_modpost = MODPOST $@
-      cmd_modpost = sed 's/ko$$/o/' $< | $(MODPOST) -T -
+      cmd_modpost = sed 's/\.ko$$/$(prelink-ext)\.o/' $< | $(MODPOST) -T -
 
-$(output-symdump): $(MODORDER) $(input-symdump) FORCE
+$(output-symdump): $(MODORDER) $(input-symdump) $(modules:.ko=$(prelink-ext).o) FORCE
        $(call if_changed,modpost)
 
 targets += $(output-symdump)