UML fails to build with CONFIG_GCC_PLUGINS=y.
$ make -s ARCH=um mrproper
$ make -s ARCH=um allmodconfig
$ make ARCH=um
UPD include/generated/uapi/linux/version.h
WRAP arch/x86/include/generated/uapi/asm/bpf_perf_event.h
WRAP arch/x86/include/generated/uapi/asm/poll.h
WRAP arch/x86/include/generated/asm/dma-contiguous.h
WRAP arch/x86/include/generated/asm/early_ioremap.h
WRAP arch/x86/include/generated/asm/export.h
WRAP arch/x86/include/generated/asm/mcs_spinlock.h
WRAP arch/x86/include/generated/asm/mm-arch-hooks.h
SYSTBL arch/x86/include/generated/asm/syscalls_32.h
SYSHDR arch/x86/include/generated/asm/unistd_32_ia32.h
SYSHDR arch/x86/include/generated/asm/unistd_64_x32.h
SYSTBL arch/x86/include/generated/asm/syscalls_64.h
SYSHDR arch/x86/include/generated/uapi/asm/unistd_32.h
SYSHDR arch/x86/include/generated/uapi/asm/unistd_64.h
SYSHDR arch/x86/include/generated/uapi/asm/unistd_x32.h
HOSTCC scripts/unifdef
CC arch/x86/um/user-offsets.s
cc1: error: cannot load plugin ./scripts/gcc-plugins/cyc_complexity_plugin.so
./scripts/gcc-plugins/cyc_complexity_plugin.so: cannot open shared object file: No such file or directory
cc1: error: cannot load plugin ./scripts/gcc-plugins/structleak_plugin.so
./scripts/gcc-plugins/structleak_plugin.so: cannot open shared object file: No such file or directory
cc1: error: cannot load plugin ./scripts/gcc-plugins/latent_entropy_plugin.so
./scripts/gcc-plugins/latent_entropy_plugin.so: cannot open shared object file: No such file or directory
cc1: error: cannot load plugin ./scripts/gcc-plugins/randomize_layout_plugin.so
./scripts/gcc-plugins/randomize_layout_plugin.so: cannot open shared object file: No such file or directory
make[1]: *** [scripts/Makefile.build;119: arch/x86/um/user-offsets.s] Error 1
make: *** [arch/um/Makefile;152: arch/x86/um/user-offsets.s] Error 2
Change the order of the preparation stage (with cleanups) to make sure
gcc-plugins is built before descending to arch/x86/um/.
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Fixes: 6b90bd4ba40b ("GCC plugin infrastructure")
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---
I will pick up this to kbuild tree to avoid conflicts.
Ack from UML people is appreciated, though.
Makefile | 4 ++--
arch/um/Makefile | 24 ++----------------------
arch/x86/um/Makefile | 4 +++-
3 files changed, 7 insertions(+), 25 deletions(-)
diff --git a/Makefile b/Makefile
index 0ce4e29..a066dab 100644
--- a/Makefile
+++ b/Makefile
@@ -1106,9 +1106,9 @@ prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h
macroprepare: prepare1 archmacros
-archprepare: archheaders archscripts macroprepare scripts_basic
+archprepare: archheaders archscripts macroprepare scripts_basic gcc-plugins
-prepare0: archprepare gcc-plugins
+prepare0: archprepare
$(Q)$(MAKE) $(build)=.
# All the preparing..
diff --git a/arch/um/Makefile b/arch/um/Makefile
index ab1066c..c080359 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -116,7 +116,8 @@ endef
archheaders:
$(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders
-archprepare: include/generated/user_constants.h
+archprepare:
+ $(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h
LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
@@ -146,25 +147,4 @@ archclean:
@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
-o -name '*.gcov' \) -type f -print | xargs rm -f
-# Generated files
-
-$(HOST_DIR)/um/user-offsets.s: __headers FORCE
- $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
-
-define filechk_gen-asm-offsets
- (set -e; \
- echo "/*"; \
- echo " * DO NOT MODIFY."; \
- echo " *"; \
- echo " * This file was generated by arch/$(ARCH)/Makefile"; \
- echo " *"; \
- echo " */"; \
- echo ""; \
- sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}" < $<; \
- echo ""; )
-endef
-
-include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
- $(call filechk,gen-asm-offsets)
-
export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH
diff --git a/arch/x86/um/Makefile b/arch/x86/um/Makefile
index c2d3d7c..1792464 100644
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -36,10 +36,12 @@ subarch-$(CONFIG_MODULES) += ../kernel/module.o
USER_OBJS := bugs_$(BITS).o ptrace_user.o fault.o
-extra-y += user-offsets.s
$(obj)/user-offsets.s: c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) \
-Iarch/x86/include/generated
+include/generated/user_constants.h: $(obj)/user-offsets.s
+ $(call filechk,offsets,__USER_CONSTANT_H__)
+
UNPROFILE_OBJS := stub_segv.o
CFLAGS_stub_segv.o := $(CFLAGS_NO_HARDENING)
--
2.7.4
