Intermediate compiling results before linking

For Developers
1

Where do I find the intermediate stuff before everything is linked to a huge binary file?

2 
find  ~/devel/openwrt/build_dir/target-mips_24kc_musl/ -name '*.o'

(adjusted for your paths and target)

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3

Does this directory contain kernel modules/executables? :confused:
I hoped that if I just compile kernel module, everything in the directory would be compiled... ^^

4

Pick what you're trying to find, but, yes, in general, the intermediates are under build_dir/

$ find build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/ -name '*.o' | head
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/mod/file2alias.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/mod/empty.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/mod/sumversion.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/mod/modpost.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/dtc/checks.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/dtc/srcpos.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/dtc/dtc-lexer.lex.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/dtc/dtc.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/dtc/livetree.o
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/scripts/dtc/util.o

$ find build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/ -name '*.ko' | head
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/crypto/crc32c_generic.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/crypto/crypto_hash.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/lib/crc-ccitt.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/drivers/net/slip/slhc.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/drivers/net/ppp/pppox.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/drivers/net/ppp/ppp_async.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/drivers/net/ppp/ppp_generic.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/drivers/net/ppp/pppoe.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/drivers/scsi/scsi_mod.ko
build_dir/target-mips_24kc_musl/linux-ath79_nand/linux-4.19.81/drivers/scsi/sd_mod.ko
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5

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