scripts/Makefile.modpost

Source file repositories/reference/linux-study-clean/scripts/Makefile.modpost

File Facts

System
Linux kernel
Corpus path
scripts/Makefile.modpost
Extension
.modpost
Size
4962 bytes
Lines
158
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0
# ===========================================================================
# Module versions
# ===========================================================================
#
# Stage one of module building created the following:
# a) The individual .o files used for the module
# b) A <module>.o file which is the .o files above linked together
# c) A <module>.mod file, listing the name of the preliminary <module>.o file,
#    plus all .o files
# d) modules.order, which lists all the modules

# Stage 2 is handled by this file and does the following
# 1) Find all modules listed in modules.order
# 2) modpost is then used to
# 3)  create one <module>.mod.c file per module
# 4)  create one Module.symvers file with CRC for all exported symbols

# Step 3 is used to place certain information in the module's ELF
# section, including information such as:
#   Version magic (see include/linux/vermagic.h for full details)
#     - Kernel release
#     - SMP is CONFIG_SMP
#     - PREEMPT is CONFIG_PREEMPT[_RT]
#     - GCC Version
#   Module info
#     - Module version (MODULE_VERSION)
#     - Module alias'es (MODULE_ALIAS)
#     - Module license (MODULE_LICENSE)
#     - See include/linux/module.h for more details

# Step 4 is solely used to allow module versioning in external modules,
# where the CRC of each module is retrieved from the Module.symvers file.

PHONY := __modpost
__modpost:

include $(objtree)/include/config/auto.conf
include $(srctree)/scripts/Kbuild.include

MODPOST = $(objtree)/scripts/mod/modpost

modpost-args =										\
	$(if $(CONFIG_MODULES),-M)							\
	$(if $(CONFIG_MODVERSIONS),-m)							\
	$(if $(CONFIG_BASIC_MODVERSIONS),-b)						\
	$(if $(CONFIG_EXTENDED_MODVERSIONS),-x)						\
	$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a)					\
	$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E)					\
	$(if $(KBUILD_MODPOST_WARN),-w)							\
	$(if $(KBUILD_NSDEPS),-d modules.nsdeps)					\
	$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N)	\
	$(if $(findstring 1, $(KBUILD_EXTRA_WARN)),-W)					\
	-o $@

modpost-deps := $(MODPOST)

# 'make -i -k' ignores compile errors, and builds as many modules as possible.
ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
modpost-args += -n
endif

# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
ifdef KBUILD_MODULES
modpost-args += -T modules.order
modpost-deps += modules.order
endif

ifeq ($(KBUILD_EXTMOD),)

Annotation

Implementation Notes