On Tue, Feb 03, 2009 at 05:06:27PM -0500, Maurizio Vitale wrote:
>
> I cannot find an answer in the documentation.
>
> The scenario is a GCC compiled with configure --prefix=SOMEWHERE
> and then the entire tree installed by make install in
> SOMEWHERE is copied to SOMEWHERE_ELSE.
>
> This is what happens when packaging a binary distribution (say rpm) and
> need the en user to be able to install in a directory he has enough
> rights to.
>
> Running the compiled gcc with -print-search-dirs shows that programs and
> libraries are searched relative to the gcc binary.
>
> Is this allowed? Note that is different (in a sense complementary) to
> the staged installation mentioned in the docs (using DESTDIR)
>
> Best regards,
>
> Maurizio
As long as you move the whole tree, and execute the compiler via a full
pathname, it should work (and are not running under VMS). Here the code in
gcc.c that does this:
/* Set up the default search paths. If there is no GCC_EXEC_PREFIX,
see if we can create it from the pathname specified in argv[0]. */
gcc_libexec_prefix = standard_libexec_prefix;
#ifndef VMS
/* FIXME: make_relative_prefix doesn't yet work for VMS. */
if (!gcc_exec_prefix)
{
gcc_exec_prefix = make_relative_prefix (argv[0], standard_bindir_prefix,
standard_exec_prefix);
gcc_libexec_prefix = make_relative_prefix (argv[0],
standard_bindir_prefix,
standard_libexec_prefix);
if (gcc_exec_prefix)
xputenv (concat ("GCC_EXEC_PREFIX=", gcc_exec_prefix, NULL));
}
else
{
/* make_relative_prefix requires a program name, but
GCC_EXEC_PREFIX is typically a directory name with a trailing
/ (which is ignored by make_relative_prefix), so append a
program name. */
char *tmp_prefix = concat (gcc_exec_prefix, "gcc", NULL);
gcc_libexec_prefix = make_relative_prefix (tmp_prefix,
standard_exec_prefix,
standard_libexec_prefix);
/* The path is unrelocated, so fallback to the original setting. */
if (!gcc_libexec_prefix)
gcc_libexec_prefix = standard_libexec_prefix;
free (tmp_prefix);
}
#else
#endif
/* From this point onward, gcc_exec_prefix is non-null if the toolchain
is relocated. The toolchain was either relocated using GCC_EXEC_PREFIX
or an automatically created GCC_EXEC_PREFIX from argv[0]. */
--
Michael Meissner, IBM
4 Technology Place Drive, MS 2203A, Westford, MA, 01886, USA
meissner@xxxxxxxxxxxxxxxxxx
