some useful Commands In GCC Compiling under Linux

2013-04-10

ld --- Listing the gcc library search path

ld --verbose | grep SEARCH

For example, in my computer, it returns like

SEARCH_DIR("/usr/i686-linux-gnu/lib32"); SEARCH_DIR("=/usr/local/lib32"); SEARCH_DIR("=/lib32"); SEARCH_DIR("=/usr/lib32"); SEARCH_DIR("=/usr/local/lib/i386-linux-gnu"); SEARCH_DIR("=/usr/local/lib"); SEARCH_DIR("=/lib/i386-linux-gnu"); SEARCH_DIR("=/lib"); SEARCH_DIR("=/usr/lib/i386-linux-gnu"); SEARCH_DIR("=/usr/lib");

ldd --- List the libraries which an executive program needs when running

shepherd@shepherd-laptop:~$ ldd /bin/bash 
	linux-gate.so.1 =>  (0x007e9000)
	libtinfo.so.5 => /lib/i386-linux-gnu/libtinfo.so.5 (0x00682000)
	libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0x00110000)
	libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0x00115000)
	/lib/ld-linux.so.2 (0x0075c000)

locate --- find a file by filename
locate is a simple command to search file in linux. Use updatedb to update the database which locate uses to search. But don't use updatedb too often because it reads your whole disk...

locate somefile

updatedb

grep --- find a file by its contents
it's coming coming...