ublk_drv: add device parameter UBLK_PARAM_TYPE_DEVT
[linux-block.git] / scripts / Makefile.modpost
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b2441318 1# SPDX-License-Identifier: GPL-2.0
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2# ===========================================================================
3# Module versions
4# ===========================================================================
5#
6# Stage one of module building created the following:
7# a) The individual .o files used for the module
c30fe7f7 8# b) A <module>.o file which is the .o files above linked together
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9# c) A <module>.mod file, listing the name of the preliminary <module>.o file,
10# plus all .o files
ff9b45c5 11# d) modules.order, which lists all the modules
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12
13# Stage 2 is handled by this file and does the following
ff9b45c5 14# 1) Find all modules listed in modules.order
1da177e4 15# 2) modpost is then used to
7c801446 16# 3) create one <module>.mod.c file per module
1da177e4 17# 4) create one Module.symvers file with CRC for all exported symbols
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18
19# Step 3 is used to place certain information in the module's ELF
20# section, including information such as:
163d3fe6 21# Version magic (see include/linux/vermagic.h for full details)
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22# - Kernel release
23# - SMP is CONFIG_SMP
4b950bb9 24# - PREEMPT is CONFIG_PREEMPT[_RT]
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25# - GCC Version
26# Module info
27# - Module version (MODULE_VERSION)
28# - Module alias'es (MODULE_ALIAS)
29# - Module license (MODULE_LICENSE)
30# - See include/linux/module.h for more details
31
32# Step 4 is solely used to allow module versioning in external modules,
4696e295 33# where the CRC of each module is retrieved from the Module.symvers file.
1da177e4 34
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35PHONY := __modpost
36__modpost:
1da177e4 37
c955ccaf 38include include/config/auto.conf
3204a7fb 39include $(srctree)/scripts/Kbuild.include
0d96fb20 40
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41MODPOST = scripts/mod/modpost
42
42593738 43modpost-args = \
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44 $(if $(CONFIG_MODVERSIONS),-m) \
45 $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \
54b77847 46 $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
735aec59 47 $(if $(KBUILD_MODPOST_WARN),-w) \
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48 $(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS)) \
49 $(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) \
bcfedae7 50 -o $@
a721588d 51
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52modpost-deps := $(MODPOST)
53
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54# 'make -i -k' ignores compile errors, and builds as many modules as possible.
55ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
42593738 56modpost-args += -n
f73edc89 57endif
a721588d 58
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59# Read out modules.order to pass in modpost.
60# Otherwise, allmodconfig would fail with "Argument list too long".
61ifdef KBUILD_MODULES
62modpost-args += -T $(MODORDER)
63modpost-deps += $(MODORDER)
64endif
65
f73edc89 66ifeq ($(KBUILD_EXTMOD),)
bcfedae7 67
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68# Generate the list of in-tree objects in vmlinux
69# ---------------------------------------------------------------------------
70
71# This is used to retrieve symbol versions generated by genksyms.
72ifdef CONFIG_MODVERSIONS
f73edc89 73vmlinux.symvers Module.symvers: .vmlinux.objs
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74endif
75
76# Ignore libgcc.a
77# Some architectures do '$(CC) --print-libgcc-file-name' to borrow libgcc.a
78# from the toolchain, but there is no EXPORT_SYMBOL in it.
79
80quiet_cmd_vmlinux_objs = GEN $@
81 cmd_vmlinux_objs = \
82 for f in $(real-prereqs); do \
83 case $${f} in \
84 *libgcc.a) ;; \
32164845 85 *) $(AR) t $${f} ;; \
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86 esac \
87 done > $@
88
89targets += .vmlinux.objs
32164845 90.vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
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91 $(call if_changed,vmlinux_objs)
92
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93ifeq ($(wildcard vmlinux.o),)
94missing-input := vmlinux.o
95output-symdump := modules-only.symvers
96else
97modpost-args += vmlinux.o
98modpost-deps += vmlinux.o
99output-symdump := $(if $(KBUILD_MODULES), Module.symvers, vmlinux.symvers)
69bc8d38 100endif
bcfedae7 101
1747269a 102else
96d97f26 103
fab546e6 104# set src + obj - they may be used in the modules's Makefile
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105obj := $(KBUILD_EXTMOD)
106src := $(obj)
107
0d96fb20 108# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
a2430b25 109include $(kbuild-file)
e3fb4df7 110
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111output-symdump := $(KBUILD_EXTMOD)/Module.symvers
112
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113ifeq ($(wildcard Module.symvers),)
114missing-input := Module.symvers
115else
116modpost-args += -i Module.symvers
117modpost-deps += Module.symvers
118endif
119
120modpost-args += -e $(addprefix -i , $(KBUILD_EXTRA_SYMBOLS))
91e6ee58 121
f73edc89 122endif # ($(KBUILD_EXTMOD),)
436b2ac6 123
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124ifneq ($(missing-input),)
125modpost-args += -w
126endif
127
bcfedae7 128quiet_cmd_modpost = MODPOST $@
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129 cmd_modpost = \
130 $(if $(missing-input), \
131 echo >&2 "WARNING: $(missing-input) is missing."; \
132 echo >&2 " Modules may not have dependencies or modversions."; \
133 echo >&2 " You may get many unresolved symbol warnings.";) \
3d57e1b7 134 $(MODPOST) $(modpost-args)
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135
136targets += $(output-symdump)
3d57e1b7 137$(output-symdump): $(modpost-deps) FORCE
f73edc89 138 $(call if_changed,modpost)
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139
140__modpost: $(output-symdump)
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141PHONY += FORCE
142FORCE:
143
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144existing-targets := $(wildcard $(sort $(targets)))
145
146-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
147
4f193362 148.PHONY: $(PHONY)