On Sat, Feb 07, 2009 at 08:50:35PM -0500, Maurizio Vitale wrote: > Michael Meissner <meissner@xxxxxxxxxxxxxxxxxx> writes: > > > 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: > > > > Thanks a lot. Do you know if this is the relevant ChangeLog entry? > > 2006-11-13 Carlos O'Donell <carlos@xxxxxxxxxxxxxxxx> > Mark Mitchell <mark@xxxxxxxxxxxxxxxx> > > * gcc.c: Organize search path variables into $prefix relative, > and well-known native. Add comments. > (add_sysrooted_prefix): Add comment. > (process_command): If !gcc_exec_prefix add $prefix based paths. > If *cross_compile == '0', add native well-known paths. > Assert tooldir_base_prefix is always relative. > (main): If print_search_dirs, and if gcc_exec_prefix is set, > use this value for 'install:' path. > * Makefile.in: Add GCC_EXEC_PREFIX to generated site.exp. > > I certainly remember a time when paths were hardcoded in gcc's binary > and I need to figure out which versions of GCC can be safely moved > around. In my industry people are still using unbelivably old versions > of gcc. Don't ask. My industry is where people design processors and > other chips so that people can run newer versions of gcc :-) While that modified the search somewhat, I wrote the original relative path support much earlier when I worked at Cygnus Solutions: Mon Nov 8 14:16:57 1999 Michael Meissner <meissner@xxxxxxxxxx> * invoke.texi (Environment Variables): Document relative path lookup. * gcc.c (DIR_UP): If not defined, define as "..". (standard_bindir_prefix): New static, holds target location to install binaries. (split_directories): New function to split a filename into component directories. (free_split_directories): New function, release memory allocated by split_directories. (make_relative_prefix): New function, make a relative pathname if the compiler is not in the expected location. (process_command): If GCC_EXEC_PREFIX was not specified, see if we can figure out an appropriate prefix from argv[0]. * Makefile.in (DRIVER_DEFINES): Use unlibsubdir in definition of STANDARD_STARTFILE_PREFIX and TOOLDIR_BASE_PREFIX. Define STANDARD_BINDIR_PREFIX. and: Fri Mar 27 16:04:49 1998 Michael Meissner <meissner@xxxxxxxxxx> * gcc.c (set_std_prefix): Add declaration. (process_command): If GCC_EXEC_PREFIX is set, remove /lib/gcc-lib/ suffix, and update the standard prefix prefix.c uses. * prefix.c (std_prefix): New global to hold default prefix value. (get_key_value): Change to use std_prefix instead of PREFIX. (translate_name): Likewise. (update_path): Likewise. (get_key_value): Release allocated scratch storage. (set_std_prefix): New function to reset the standard prefix. -- Michael Meissner, IBM 4 Technology Place Drive, MS 2203A, Westford, MA, 01886, USA meissner@xxxxxxxxxxxxxxxxxx
