LinuxQuestions.org
Visit the LQ Articles and Editorials section
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Software
User Name
Password
Linux - Software This forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.

Notices

Reply
 
Search this Thread
Old 03-03-2012, 11:59 PM   #1
Zssfssz
Member
 
Registered: Sep 2011
Location: Las Vegas!
Distribution: Ubuntu n' Flavors, ReactOS, MINIX3, FreeDOS, Arch
Posts: 339

Rep: Reputation: Disabled
Post GCC; See what arguments are passed to the linker.


I am in a situation where I must have an intermediat object file. However when I build the execuable there is error when linking. When having the compiler start the linker for me then it goes fine. Is there an easy (Not Going Through GCC SRC) way to find out what is passed to the linker in terms of arguments. Thanks.
 
Old 03-04-2012, 11:08 AM   #2
makyo
Member
 
Registered: Aug 2006
Location: Saint Paul, MN, USA
Distribution: {Free,Open}BSD, CentOS, Debian, Fedora, Solaris, SuSE
Posts: 718

Rep: Reputation: 72
Hi.

Quote:
GCC uses a utility called collect2 on nearly all systems to arrange to call various initialization functions at start time.

The program collect2 works by linking the program once and looking through the linker output file for symbols with particular names indicating they are constructor functions. If it finds any, it creates a new temporary `.c' file containing a table of them, compiles it, and links the program a second time including that file.

The actual calls to the constructors are carried out by a subroutine called __main, which is called (automatically) at the beginning of the body of main (provided main was compiled with GNU CC). Calling __main is necessary, even when compiling C code, to allow linking C and C++ object code together. (If you use -nostdlib, you get an unresolved reference to __main, since it's defined in the standard GCC library. Include -lgcc at the end of your compiler command line to resolve this reference.)

The program collect2 is installed as ld in the directory where the passes of the compiler are installed ...

http://gcc.gnu.org/onlinedocs/gccint/Collect2.html
and
Code:
-v Print (on standard error output) the commands executed to
run the stages of compilation. Also print the version number
of the compiler driver program and of the preprocessor and the
compiler proper.

-### Like -v except the commands are not executed and all
command arguments are quoted. This is useful for shell scripts
to capture the driver-generated command lines.

-- excerpt from man gcc, q.v.
A partial output of the -v option from a trivial c code compilation on my system is:
Quote:
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.3.2/:/usr/lib/gcc/x86_64-linux-gnu/4.3.2/:/usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../../../lib/:/lib/../lib/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-mtune=generic'
/usr/lib/gcc/x86_64-linux-gnu/4.3.2/collect2 --eh-frame-hdr -m elf_x86_64 --hash-style=both -dynamic-linker /lib64/ld-linux-x86-64.so.2 /usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../../../lib/crt1.o /usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../../../lib/crti.o /usr/lib/gcc/x86_64-linux-gnu/4.3.2/crtbegin.o -L/usr/lib/gcc/x86_64-linux-gnu/4.3.2 -L/usr/lib/gcc/x86_64-linux-gnu/4.3.2 -L/usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../../../lib -L/lib/../lib -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../.. /tmp/ccgpROfj.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-linux-gnu/4.3.2/crtend.o /usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../../../lib/crtn.o
For this environment:
Code:
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
gcc (Debian 4.3.2-1.1) 4.3.2
Best wishes ... cheers, makyo
 
  


Reply

Tags
arguments, gcc, mingw


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How are arguments passed to a bash script? jiml8 Programming 1 04-09-2009 05:28 PM
gcc Linker error - please help! Liche Programming 5 09-26-2005 07:14 AM
IPW2200 Make error macro "create_workqueue" passed 2 arguments, but takes just 1 jplev22 Linux - Wireless Networking 2 09-16-2005 11:34 AM
gcc linker question alenD Programming 2 08-01-2005 09:31 PM
php not taking arguments when passed through URLs BrianK Linux - Software 2 03-29-2004 11:38 AM


All times are GMT -5. The time now is 12:42 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration