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Is there is any tool on AIX which can tell me by looking at the
executable that what was the complier to make that executable

shankha wrote:
> Is there is any tool on AIX which can tell me by looking at the
> executable that what was the complier to make that executable

You can try a couple of things, but I am not sure it will give you
exactly what you are looking for:

The "file" command will tell you if a program is executable, but does
not give you the specifics such as indicating that the exceutable was
written in C or Perl or Korn or whatever.

You could try the "strings" command, which may help. It sometimes list
the compiler at the top, or the libraries used.

For example, the first ten lines of this "kornsample" script shows it
was compiled using a package called Shell-Lock (It is a Korn Shell
script):

# strings kornsample|head
H: Too many args
: No read permission
awk
@(#)shell-lock
1.6.2.2
?BBOF
KTYPPa
+40;3?
9;4/|^|
j^o89&o.)00


In the "csample" program below, you can see a library "threads_init.c"
and its original path. This suggests it was a C source, and the path
may suggest whether Visual Age or some other C compiler was used.

# strings csample |head
@(#)61
1.14 src/bos/usr/ccs/lib/libc/__threads_init.c, libcthrd, bos510
7/11/00 12:04:
14
hea2
bat#
aba2
info
jobs
qmv1
hea3
srch


Hope this helps

Steve

I don' t think there is a way to tell that
a certain compiler has created an executable.

Now, you can tell what an executable has been linked against
by using "dump -H" or ("dump -n" for alot of verbose output
including symbols in libraries that are referenced)

You can also tell what source files have been used for an
executable (If they followed the sccs file format) by using "what"

Hope this helps,
-Casey

steven_nospam at Yahoo! Canada wrote:
> shankha wrote:
> > Is there is any tool on AIX which can tell me by looking at the
> > executable that what was the complier to make that executable
>
> You can try a couple of things, but I am not sure it will give you
> exactly what you are looking for:
>
> The "file" command will tell you if a program is executable, but does
> not give you the specifics such as indicating that the exceutable was
> written in C or Perl or Korn or whatever.
>
> You could try the "strings" command, which may help. It sometimes list
> the compiler at the top, or the libraries used.
>
> For example, the first ten lines of this "kornsample" script shows it
> was compiled using a package called Shell-Lock (It is a Korn Shell
> script):
>
> # strings kornsample|head
> H: Too many args
> : No read permission
> awk
> @(#)shell-lock
> 1.6.2.2
> ?BBOF
> KTYPPa
> +40;3?
> 9;4/|^|
> j^o89&o.)00
>
>
> In the "csample" program below, you can see a library "threads_init.c"
> and its original path. This suggests it was a C source, and the path
> may suggest whether Visual Age or some other C compiler was used.
>
> # strings csample |head
> @(#)61
> 1.14 src/bos/usr/ccs/lib/libc/__threads_init.c, libcthrd, bos510
> 7/11/00 12:04:
> 14
> hea2
> bat#
> aba2
> info
> jobs
> qmv1
> hea3
> srch
>
>
> Hope this helps
>
> Steve

i need to use this information in a source file ...
caseyjbrotherton@gmail.com wrote:
> I don' t think there is a way to tell that
> a certain compiler has created an executable.
>
> Now, you can tell what an executable has been linked against
> by using "dump -H" or ("dump -n" for alot of verbose output
> including symbols in libraries that are referenced)
>
> You can also tell what source files have been used for an
> executable (If they followed the sccs file format) by using "what"
>
> Hope this helps,
> -Casey
>
> steven_nospam at Yahoo! Canada wrote:
> > shankha wrote:
> > > Is there is any tool on AIX which can tell me by looking at the
> > > executable that what was the complier to make that executable
> >
> > You can try a couple of things, but I am not sure it will give you
> > exactly what you are looking for:
> >
> > The "file" command will tell you if a program is executable, but does
> > not give you the specifics such as indicating that the exceutable was
> > written in C or Perl or Korn or whatever.
> >
> > You could try the "strings" command, which may help. It sometimes list
> > the compiler at the top, or the libraries used.
> >
> > For example, the first ten lines of this "kornsample" script shows it
> > was compiled using a package called Shell-Lock (It is a Korn Shell
> > script):
> >
> > # strings kornsample|head
> > H: Too many args
> > : No read permission
> > awk
> > @(#)shell-lock
> > 1.6.2.2
> > ?BBOF
> > KTYPPa
> > +40;3?
> > 9;4/|^|
> > j^o89&o.)00
> >
> >
> > In the "csample" program below, you can see a library "threads_init.c"
> > and its original path. This suggests it was a C source, and the path
> > may suggest whether Visual Age or some other C compiler was used.
> >
> > # strings csample |head
> > @(#)61
> > 1.14 src/bos/usr/ccs/lib/libc/__threads_init.c, libcthrd, bos510
> > 7/11/00 12:04:
> > 14
> > hea2
> > bat#
> > aba2
> > info
> > jobs
> > qmv1
> > hea3
> > srch
> >
> >
> > Hope this helps
> >
> > Steve

caseyjbrotherton@gmail.com wrote:
> I don' t think there is a way to tell that
> a certain compiler has created an executable.

If the executable hasn't been stripped, dump -tv (to look at the
regular symbol table) will show you .file entries placed by
the xlc/xlC compilers. This information includes version number,
although not necessarily more detail than version/release.

There are so few compilers available for AIX that you can
usually figure out if it was the XL compilers (via
strings and dump) or gcc/g++ (via dump -Hv and looking at the
dependent modules).

Mostly, it's about derivation heuristics.

i want to use this information in c code .. like if compiler=gcc then
do some few things
Gary R. Hook wrote:
> caseyjbrotherton@gmail.com wrote:
> > I don' t think there is a way to tell that
> > a certain compiler has created an executable.
>
> If the executable hasn't been stripped, dump -tv (to look at the
> regular symbol table) will show you .file entries placed by
> the xlc/xlC compilers. This information includes version number,
> although not necessarily more detail than version/release.
>
> There are so few compilers available for AIX that you can
> usually figure out if it was the XL compilers (via
> strings and dump) or gcc/g++ (via dump -Hv and looking at the
> dependent modules).
>
> Mostly, it's about derivation heuristics.

shankha wrote:
> i want to use this information in c code .. like if compiler=gcc then
> do some few things

That's not a runtime assessment, it's a compile time assessment.
Just require your builder to use -DGCC or -DXLC and
use #ifdef GCC/etc in your code.

okay sorry .. i was not able to explain my problem

suppose there is a executable
gcc -g -o test test.c

then when i do myproduct test ..

inside that i want to find some way to find out if it was gcc or not
and then set some boolean variable setgcc

and then write something like
if(setgcc)
do this
else
do this
inside my code
i do want to pass any compile time options
Gary R. Hook wrote:
> shankha wrote:
> > i want to use this information in c code .. like if compiler=gcc then
> > do some few things
>
> That's not a runtime assessment, it's a compile time assessment.
> Just require your builder to use -DGCC or -DXLC and
> use #ifdef GCC/etc in your code.

shankha wrote:
> okay sorry .. i was not able to explain my problem
>
> suppose there is a executable
> gcc -g -o test test.c
>
> then when i do myproduct test ..
>
> inside that i want to find some way to find out if it was gcc or not
> and then set some boolean variable setgcc

Aside from heuristics that are based upon the symbol table or other
information, there's no reliable method to figure out how an
executable was constructed.