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glibc building question


hi list,

when I build glibc, there are many gcc commands like the one I am attaching
that are not clear to me. what is going on here ? what is it doing ?
i can't see any source file... and there is a trailing dash here -
what does it do ?

gcc -c -Iinclude -I/home/ohad/glibc-2.5-build -Isysdeps/i386/elf
-Inptl/sysdeps/unix/sysv/linux/i386/i686 -Inptl/sysdeps/unix/sysv/linux/i386
-Isysdeps/unix/sysv/linux/i386 -Inptl/sysdeps/unix/sysv/linux
-Inptl/sysdeps/pthread -Isysdeps/pthread -Isysdeps/unix/sysv/linux -Isysdeps/gnu
-Isysdeps/unix/common -Isysdeps/unix/mman
-Isysdeps/unix/inet -Isysdeps/unix/sysv/i386 -Inptl/sysdeps/unix/sysv
-Isysdeps/unix/sysv -Isysdeps/unix/i386 -Inptl/sysdeps/unix -Isysdeps/unix
-Isysdeps/posix -Isysdeps/i386/i686/fpu -Inptl/sysdeps/i386/i686
-Isysdeps/i386/i686 -Isysdeps/i386/i486 -Inptl/sysdeps/i386/i486
-Isysdeps/i386/fpu -Inptl/sysdeps/i386 -Isysdeps/i386 -Isysdeps/wordsize-32
-Isysdeps/ieee754/ldbl-96 -Isysdeps/ieee754/dbl-64 -Isysdeps/ieee754/flt-32
-Isysdeps/ieee754 -Isysdeps/generic/elf -Isysdeps/generic
-Inptl -Ilibio -I. -I /lib/modules/2.6.20-16-generic/build/include
-_LIBC_REENTRANT
-include include/libc-symbols.h -DASSEMBLER -DGAS_SYNTAX
-Wa,--noexecstack -E -x assembler-with-cpp -D__OPTIMIZE__ -

thank you
metuki


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