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Linux/Kbuild

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Diff markup

Differences between /Kbuild (Version linux-6.12-rc7) and /Kbuild (Version linux-2.6.32.71)


  1 # SPDX-License-Identifier: GPL-2.0             << 
  2 #                                                   1 #
  3 # Kbuild for top-level directory of the kernel      2 # Kbuild for top-level directory of the kernel
                                                   >>   3 # This file takes care of the following:
                                                   >>   4 # 1) Generate bounds.h
                                                   >>   5 # 2) Generate asm-offsets.h (may need bounds.h)
                                                   >>   6 # 3) Check for missing system calls
                                                   >>   7 
                                                   >>   8 #####
                                                   >>   9 # 1) Generate bounds.h
                                                   >>  10 
                                                   >>  11 bounds-file := include/linux/bounds.h
                                                   >>  12 
                                                   >>  13 always  := $(bounds-file)
                                                   >>  14 targets := $(bounds-file) kernel/bounds.s
                                                   >>  15 
                                                   >>  16 quiet_cmd_bounds = GEN     $@
                                                   >>  17 define cmd_bounds
                                                   >>  18         (set -e; \
                                                   >>  19          echo "#ifndef __LINUX_BOUNDS_H__"; \
                                                   >>  20          echo "#define __LINUX_BOUNDS_H__"; \
                                                   >>  21          echo "/*"; \
                                                   >>  22          echo " * DO NOT MODIFY."; \
                                                   >>  23          echo " *"; \
                                                   >>  24          echo " * This file was generated by Kbuild"; \
                                                   >>  25          echo " *"; \
                                                   >>  26          echo " */"; \
                                                   >>  27          echo ""; \
                                                   >>  28          sed -ne $(sed-y) $<; \
                                                   >>  29          echo ""; \
                                                   >>  30          echo "#endif" ) > $@
                                                   >>  31 endef
                                                   >>  32 
                                                   >>  33 # We use internal kbuild rules to avoid the "is up to date" message from make
                                                   >>  34 kernel/bounds.s: kernel/bounds.c FORCE
                                                   >>  35         $(Q)mkdir -p $(dir $@)
                                                   >>  36         $(call if_changed_dep,cc_s_c)
                                                   >>  37 
                                                   >>  38 $(obj)/$(bounds-file): kernel/bounds.s Kbuild
                                                   >>  39         $(Q)mkdir -p $(dir $@)
                                                   >>  40         $(call cmd,bounds)
  4                                                    41 
  5 # Prepare global headers and check sanity befo !!  42 #####
  6 # -------------------------------------------- !!  43 # 2) Generate asm-offsets.h
  7                                                !!  44 #
  8 # Generate bounds.h                            << 
  9                                                << 
 10 bounds-file := include/generated/bounds.h      << 
 11                                                << 
 12 targets := kernel/bounds.s                     << 
 13                                                << 
 14 $(bounds-file): kernel/bounds.s FORCE          << 
 15         $(call filechk,offsets,__LINUX_BOUNDS_ << 
 16                                                << 
 17 # Generate timeconst.h                         << 
 18                                                << 
 19 timeconst-file := include/generated/timeconst. << 
 20                                                << 
 21 filechk_gentimeconst = echo $(CONFIG_HZ) | bc  << 
 22                                                << 
 23 $(timeconst-file): kernel/time/timeconst.bc FO << 
 24         $(call filechk,gentimeconst)           << 
 25                                                << 
 26 # Generate asm-offsets.h                       << 
 27                                                    45 
 28 offsets-file := include/generated/asm-offsets. !!  46 offsets-file := include/asm/asm-offsets.h
 29                                                    47 
                                                   >>  48 always  += $(offsets-file)
                                                   >>  49 targets += $(offsets-file)
 30 targets += arch/$(SRCARCH)/kernel/asm-offsets.     50 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
 31                                                    51 
 32 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeco << 
 33                                                    52 
 34 $(offsets-file): arch/$(SRCARCH)/kernel/asm-of !!  53 # Default sed regexp - multiline due to syntax constraints
 35         $(call filechk,offsets,__ASM_OFFSETS_H !!  54 define sed-y
                                                   >>  55         "/^->/{s:->#\(.*\):/* \1 */:; \
                                                   >>  56         s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
                                                   >>  57         s:->::; p;}"
                                                   >>  58 endef
                                                   >>  59 
                                                   >>  60 quiet_cmd_offsets = GEN     $@
                                                   >>  61 define cmd_offsets
                                                   >>  62         (set -e; \
                                                   >>  63          echo "#ifndef __ASM_OFFSETS_H__"; \
                                                   >>  64          echo "#define __ASM_OFFSETS_H__"; \
                                                   >>  65          echo "/*"; \
                                                   >>  66          echo " * DO NOT MODIFY."; \
                                                   >>  67          echo " *"; \
                                                   >>  68          echo " * This file was generated by Kbuild"; \
                                                   >>  69          echo " *"; \
                                                   >>  70          echo " */"; \
                                                   >>  71          echo ""; \
                                                   >>  72          sed -ne $(sed-y) $<; \
                                                   >>  73          echo ""; \
                                                   >>  74          echo "#endif" ) > $@
                                                   >>  75 endef
                                                   >>  76 
                                                   >>  77 # We use internal kbuild rules to avoid the "is up to date" message from make
                                                   >>  78 arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
                                                   >>  79                                       $(obj)/$(bounds-file) FORCE
                                                   >>  80         $(Q)mkdir -p $(dir $@)
                                                   >>  81         $(call if_changed_dep,cc_s_c)
 36                                                    82 
 37 # Check for missing system calls               !!  83 $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
                                                   >>  84         $(call cmd,offsets)
                                                   >>  85 
                                                   >>  86 #####
                                                   >>  87 # 3) Check for missing system calls
                                                   >>  88 #
 38                                                    89 
 39 quiet_cmd_syscalls = CALL    $<                    90 quiet_cmd_syscalls = CALL    $<
 40       cmd_syscalls = $(CONFIG_SHELL) $< $(CC)  !!  91       cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
 41                                                    92 
 42 PHONY += missing-syscalls                          93 PHONY += missing-syscalls
 43 missing-syscalls: scripts/checksyscalls.sh $(o !!  94 missing-syscalls: scripts/checksyscalls.sh FORCE
 44         $(call cmd,syscalls)                       95         $(call cmd,syscalls)
 45                                                    96 
 46 # Check the manual modification of atomic head !!  97 # Delete all targets during make clean
 47                                                !!  98 clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets)))
 48 quiet_cmd_check_sha1 = CHKSHA1 $<              << 
 49       cmd_check_sha1 = \                       << 
 50         if ! command -v sha1sum >/dev/null; th << 
 51                 echo "warning: cannot check th << 
 52                 exit 0; \                      << 
 53         fi; \                                  << 
 54         if [ "$$(sed -n '$$s:// ::p' $<)" != \ << 
 55              "$$(sed '$$d' $< | sha1sum | sed  << 
 56                 echo "error: $< has been modif << 
 57                 exit 1; \                      << 
 58         fi; \                                  << 
 59         touch $@                               << 
 60                                                << 
 61 atomic-checks += $(addprefix $(obj)/.checked-, << 
 62           atomic-arch-fallback.h \             << 
 63           atomic-instrumented.h \              << 
 64           atomic-long.h)                       << 
 65                                                << 
 66 targets += $(atomic-checks)                    << 
 67 $(atomic-checks): $(obj)/.checked-%: include/l << 
 68         $(call if_changed,check_sha1)          << 
 69                                                << 
 70 # A phony target that depends on all the prepa << 
 71                                                << 
 72 PHONY += prepare                               << 
 73 prepare: $(offsets-file) missing-syscalls $(at << 
 74         @:                                     << 
 75                                                << 
 76 # Ordinary directory descending                << 
 77 # -------------------------------------------- << 
 78                                                << 
 79 obj-y                   += init/               << 
 80 obj-y                   += usr/                << 
 81 obj-y                   += arch/$(SRCARCH)/    << 
 82 obj-y                   += $(ARCH_CORE)        << 
 83 obj-y                   += kernel/             << 
 84 obj-y                   += certs/              << 
 85 obj-y                   += mm/                 << 
 86 obj-y                   += fs/                 << 
 87 obj-y                   += ipc/                << 
 88 obj-y                   += security/           << 
 89 obj-y                   += crypto/             << 
 90 obj-$(CONFIG_BLOCK)     += block/              << 
 91 obj-$(CONFIG_IO_URING)  += io_uring/           << 
 92 obj-$(CONFIG_RUST)      += rust/               << 
 93 obj-y                   += $(ARCH_LIB)         << 
 94 obj-y                   += drivers/            << 
 95 obj-y                   += sound/              << 
 96 obj-$(CONFIG_SAMPLES)   += samples/            << 
 97 obj-$(CONFIG_NET)       += net/                << 
 98 obj-y                   += virt/               << 
 99 obj-y                   += $(ARCH_DRIVERS)     << 
                                                      

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