| | 1 | # |
| | 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 timeconst.h |
| | 6 | # 3) Generate asm-offsets.h (may need bounds.h and timeconst.h) |
| | 7 | # 4) Check for missing system calls |
| | 8 | # 5) Generate constants.py (may need bounds.h) |
| | 9 | |
| | 10 | # Default sed regexp - multiline due to syntax constraints |
| | 11 | define sed-y |
| | 12 | "/^->/{s:->#\(.*\):/* \1 */:; \ |
| | 13 | s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ |
| | 14 | s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ |
| | 15 | s:->::; p;}" |
| | 16 | endef |
| | 17 | |
| | 18 | # Use filechk to avoid rebuilds when a header changes, but the resulting file |
| | 19 | # does not |
| | 20 | define filechk_offsets |
| | 21 | (set -e; \ |
| | 22 | echo "#ifndef $2"; \ |
| | 23 | echo "#define $2"; \ |
| | 24 | echo "/*"; \ |
| | 25 | echo " * DO NOT MODIFY."; \ |
| | 26 | echo " *"; \ |
| | 27 | echo " * This file was generated by Kbuild"; \ |
| | 28 | echo " */"; \ |
| | 29 | echo ""; \ |
| | 30 | sed -ne $(sed-y); \ |
| | 31 | echo ""; \ |
| | 32 | echo "#endif" ) |
| | 33 | endef |
| | 34 | |
| | 35 | ##### |
| | 36 | # 1) Generate bounds.h |
| | 37 | |
| | 38 | bounds-file := include/generated/bounds.h |
| | 39 | |
| | 40 | always := $(bounds-file) |
| | 41 | targets := kernel/bounds.s |
| | 42 | |
| | 43 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| | 44 | kernel/bounds.s: kernel/bounds.c FORCE |
| | 45 | $(Q)mkdir -p $(dir $@) |
| | 46 | $(call if_changed_dep,cc_s_c) |
| | 47 | |
| | 48 | $(obj)/$(bounds-file): kernel/bounds.s FORCE |
| | 49 | $(call filechk,offsets,__LINUX_BOUNDS_H__) |
| | 50 | |
| | 51 | ##### |
| | 52 | # 2) Generate timeconst.h |
| | 53 | |
| | 54 | timeconst-file := include/generated/timeconst.h |
| | 55 | |
| | 56 | targets += $(timeconst-file) |
| | 57 | |
| | 58 | quiet_cmd_gentimeconst = GEN $@ |
| | 59 | define cmd_gentimeconst |
| | 60 | (echo $(CONFIG_HZ) | bc -q $< ) > $@ |
| | 61 | endef |
| | 62 | define filechk_gentimeconst |
| | 63 | (echo $(CONFIG_HZ) | bc -q $< ) |
| | 64 | endef |
| | 65 | |
| | 66 | $(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE |
| | 67 | $(call filechk,gentimeconst) |
| | 68 | |
| | 69 | ##### |
| | 70 | # 3) Generate asm-offsets.h |
| | 71 | # |
| | 72 | |
| | 73 | offsets-file := include/generated/asm-offsets.h |
| | 74 | |
| | 75 | always += $(offsets-file) |
| | 76 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
| | 77 | |
| | 78 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| | 79 | arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ |
| | 80 | $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE |
| | 81 | $(Q)mkdir -p $(dir $@) |
| | 82 | $(call if_changed_dep,cc_s_c) |
| | 83 | |
| | 84 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE |
| | 85 | $(call filechk,offsets,__ASM_OFFSETS_H__) |
| | 86 | |
| | 87 | ##### |
| | 88 | # 4) Check for missing system calls |
| | 89 | # |
| | 90 | |
| | 91 | always += missing-syscalls |
| | 92 | targets += missing-syscalls |
| | 93 | |
| | 94 | quiet_cmd_syscalls = CALL $< |
| | 95 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) |
| | 96 | |
| | 97 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE |
| | 98 | $(call cmd,syscalls) |
| | 99 | |
| | 100 | ##### |
| | 101 | # 5) Generate constants for Python GDB integration |
| | 102 | # |
| | 103 | |
| | 104 | extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py |
| | 105 | |
| | 106 | build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file) |
| | 107 | @$(MAKE) $(build)=scripts/gdb/linux $@ |
| | 108 | |
| | 109 | # Keep these three files during make clean |
| | 110 | no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file) |
projects / linux-2.6-block.git / blame_incremental