Mendrake9.2, bash: cannot execute binary file

premier_la · 01-19-2004, 06:12 PM

I wrote a simple c++ programme. when I try to execute it, the bash shell complain that it "cannot execute binary file."

Any idea why this error ?

I have set chmod 777 to the executable, but the same problem.

Thanks,
Premier_la

Quartz · 01-20-2004, 04:53 AM

Are you sure the compilation is correct and generate an executable file ?
With ldd you can check linker information.

Yves

premier_la · 01-20-2004, 08:10 AM

I tried, this is what I get :

$ld -s -lc /usr/lib/crt1.o test.o
/usr/lib/crt1.o(.text+0xc): In function `_start':
../sysdeps/i386/elf/start.S:92: undefined reference to `__libc_csu_fini'
/usr/lib/crt1.o(.text+0x11):../sysdeps/i386/elf/start.S:93: undefined reference to `__libc_csu_init'

$ld -s -lc /usr/lib/crtn.o test.o
ld: warning: cannot find entry symbol _start; defaulting to 00000000080481a8

premier_la · 01-21-2004, 12:45 PM

I got it executed this way:
I tried $g++ test.cpp
which produce a.out & it executes properly.

But when I try this way
$g++ -o test -c test.cpp does not work

also $cc .... does not work ??
Is there any configuration to be done in .bash_profile ??
Thanks

magicvash · 01-22-2004, 05:16 PM

i'm not sure you're understanding g++ correctly.

g++ test.cpp

this says "compile test.cpp, and link the object file(s) together into an executeable called a.out"

g++ -o test -c test.cpp

this says "compile the file test.cpp into an object file and name that object file test"

what you want is

g++ -o test test.cpp

this says "compile the file test.cpp into an object file and link the object files together to form an executable named test"