Messages in this thread | | | Date | Fri, 4 Dec 2009 11:07:49 -0700 | From | Alex Chiang <> | Subject | kbuild - hostprogs not seeing CONFIG_FOO? |
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I'm hoping someone can help me understand this because I don't have the Makefile-fu to figure out what's going on.
I'm trying to patch a helper program: Documentation/vm/page-types.c
The interesting part of the patch is this:
+enum pageflags { + PG_locked, /* Page is locked. Don't touch. */ + PG_error, + PG_referenced, + PG_uptodate, + PG_dirty, + PG_lru, + PG_active, + PG_slab, + PG_owner_priv_1, /* Owner use. If pagecache, fs may use*/ + PG_arch_1, + PG_reserved, + PG_private, /* If pagecache, has fs-private data */ + PG_private_2, /* If pagecache, has fs aux data */ + PG_writeback, /* Page is under writeback */ +#ifdef CONFIG_PAGEFLAGS_EXTENDED + PG_head, /* A head page */ + PG_tail, /* A tail page */ +#else + PG_compound, /* A compound page */ +#endif + PG_swapcache, /* Swap page: swp_entry_t in private */ + PG_mappedtodisk, /* Has blocks allocated on-disk */ + PG_reclaim, /* To be reclaimed asap */ + PG_buddy, /* Page is free, on buddy lists */ + PG_swapbacked, /* Page is backed by RAM/swap */ + PG_unevictable, /* Page is "unevictable" */ +#ifdef CONFIG_MMU + PG_mlocked, /* Page is vma mlocked */ +#endif +#ifdef CONFIG_ARCH_USES_PG_UNCACHED + PG_uncached, /* Page has been mapped as uncached */ +#endif +#ifdef CONFIG_MEMORY_FAILURE + PG_hwpoison, /* hardware poisoned page. Don't touch */ +#endif + __NR_PAGEFLAGS, +};
The #ifdefs are what I care about. I want to build this helper program with the same config that I build the kernel so it can accurately describe page flags.
src/ia64 # grep CONFIG_PAGEFLAGS_EXTENDED .config CONFIG_PAGEFLAGS_EXTENDED=y
src/ia64 # grep CONFIG_PAGEFLAGS_EXTENDED include/generated/autoconf.h #define CONFIG_PAGEFLAGS_EXTENDED 1
src/ia64 # grep CONFIG_PAGEFLAGS_EXTENDED include/config/auto.conf CONFIG_PAGEFLAGS_EXTENDED=y
But when I build, it doesn't seem to be getting those config values. I determined this with a test case using the binary.
As far as I can tell, hostprogs *should* be getting all the same stuff as the rest of the tree when building, but in my case, it's clearly not.
Operator error? Something else?
Thanks, /ac
coffee0:/usr/local/src/ia64 # make V=1 Documentation/vm/ make -f scripts/Makefile.build obj=arch/ia64/kernel include/generated/nr-irqs.h make[1]: `include/generated/nr-irqs.h' is up to date. rm -f include/config/kernel.release echo 2.6.32-rc7-mm1 > include/config/kernel.release set -e; : ' CHK include/linux/version.h'; mkdir -p include/linux/; (echo \#define LINUX_VERSION_CODE 132640; echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) < /usr/local/src/ia64/Makefile > include/linux/version.h.tmp; if [ -r include/linux/version.h ] && cmp -s include/linux/version.h include/linux/version.h.tmp; then rm -f include/linux/version.h.tmp; else : ' UPD include/linux/version.h'; mv -f include/linux/version.h.tmp include/linux/version.h; fi set -e; : ' CHK include/generated/utsrelease.h'; mkdir -p include/generated/; if [ `echo -n "2.6.32-rc7-mm1" | wc -c ` -gt 64 ]; then echo '"2.6.32-rc7-mm1" exceeds 64 characters' >&2; exit 1; fi; (echo \#define UTS_RELEASE \"2.6.32-rc7-mm1\";) < include/config/kernel.release > include/generated/utsrelease.h.tmp; if [ -r include/generated/utsrelease.h ] && cmp -s include/generated/utsrelease.h include/generated/utsrelease.h.tmp; then rm -f include/generated/utsrelease.h.tmp; else : ' UPD include/generated/utsrelease.h'; mv -f include/generated/utsrelease.h.tmp include/generated/utsrelease.h; fi mkdir -p .tmp_versions make -f scripts/Makefile.build obj=scripts/basic make -f scripts/Makefile.build obj=. mkdir -p kernel/ mkdir -p arch/ia64/kernel/ make -f scripts/Makefile.build obj=. missing-syscalls /bin/sh scripts/checksyscalls.sh gcc -Wp,-MD,./.missing-syscalls.d -nostdinc -isystem /usr/lib/gcc/ia64-suse-linux/4.3/include -I/usr/local/src/ia64/arch/ia64/include -Iinclude -include include/generated/autoconf.h -D__KERNEL__ -DHAVE_WORKING_TEXT_ALIGN -DHAVE_MODEL_SMALL_ATTRIBUTE -DHAVE_SERIALIZE_DIRECTIVE -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -Os -pipe -ffixed-r13 -mfixed-range=f12-f15,f32-f127 -falign-functions=32 -frename-registers -fno-optimize-sibling-calls -fno-stack-protector -fomit-frame-pointer -g -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -mconstant-gp -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(missing_syscalls)" -D"KBUILD_MODNAME=KBUILD_STR(missing_syscalls)" -D"DEBUG_HASH=8" -D"DEBUG_HASH2=54" <stdin>:1519:2: warning: #warning syscall perf_event_open not implemented <stdin>:1523:2: warning: #warning syscall recvmmsg not implemented <stdin>:1527:2: warning: #warning syscall fanotify_init not implemented <stdin>:1531:2: warning: #warning syscall fanotify_mark not implemented make -f scripts/Makefile.build obj=scripts make -f scripts/Makefile.build obj=scripts/genksyms make -f scripts/Makefile.build obj=scripts/mod mkdir -p .tmp_versions make KBUILD_MODULES=1 \ -f scripts/Makefile.build obj=Documentation/vm (cat /dev/null; ) > Documentation/vm/modules.order gcc -Wp,-MD,Documentation/vm/.page-types.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -o Documentation/vm/page-types Documentation/vm/page-types.c
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