diff options
Diffstat (limited to 'dtools/bin/tweak-cell-for-cross-compiling')
| -rwxr-xr-x | dtools/bin/tweak-cell-for-cross-compiling | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/dtools/bin/tweak-cell-for-cross-compiling b/dtools/bin/tweak-cell-for-cross-compiling deleted file mode 100755 index e63700420..000000000 --- a/dtools/bin/tweak-cell-for-cross-compiling +++ /dev/null @@ -1,143 +0,0 @@ -#!/usr/bin/env python - -""" -This should only be run on a native Cell machine. E.g., ps3, qs21, etc. - -It makes a few modifications to the file system and some pseudo shared libs -so that cross compiling from a build machine over NFS works. The changes -do not harm local compilation. - -We create a symlink from /mnt/cell-root that points to / -This allows the local and build machine to access the root filesystem -using a common name, /mnt/cell-root. This is required because -configure hardcodes absolute paths into the generated Makefiles. - -There are some .so files that aren't really shared libraries, but rather are -ascii linker scripts containing instructions to the linker. Most of them -contain a GROUP directive that includes hard-coded paths relative to /. -We modify those files such that the hard-coded paths are relative to /mnt/cell-root -instead of /. This allows them to work locally and while cross compiling over NFS. - -E.g., /usr/lib/libc.so originally contains: - - /* GNU ld script - Use the shared library, but some functions are only in - the static library, so try that secondarily. */ - OUTPUT_FORMAT(elf32-powerpc) - GROUP ( /lib/libc.so.6 /usr/lib/libc_nonshared.a AS_NEEDED ( /lib/ld.so.1 ) ) - -We modify it such that it reads: - - /* GNU ld script - Use the shared library, but some functions are only in - the static library, so try that secondarily. */ - OUTPUT_FORMAT(elf32-powerpc) - GROUP ( /mnt/cell-root/lib/libc.so.6 /mnt/cell-root/usr/lib/libc_nonshared.a AS_NEEDED ( /mnt/cell-root/lib/ld.so.1 ) ) - -We backup <foo>.so to <foo>.so.original - -""" - -import os -import os.path -import sys -import shutil -import re - -cell_root_path = '/mnt/cell-root' - -def ensure_cell(): - s = open('/proc/cpuinfo','r').read() - if s.find('Cell Broadband Engine') == -1: - sys.stderr.write('This program should only be run on Cell machines.\n') - raise SystemExit, 1 - -def make_symlinks(): - create_symlink_if_reqd(cell_root_path, "..") - create_symlink_if_reqd("/opt/cell/toolchain", "../../usr") - create_symlink_if_reqd("/opt/cell/sysroot", "../..") - -def symlink_exists_and_is_ok(path, contents): - return (os.path.islink(path) and os.readlink(path) == contents) - -def create_symlink_if_reqd(path, contents): - if symlink_exists_and_is_ok(path, contents): - return - - if os.path.islink(path): - # Is a symlink but points wrong place - os.remove(path) - os.symlink(contents, path) - return - - if os.path.isdir(path): - # if it's empty we'll remove it and create the link - try: - os.rmdir(path) - except: - # directory wasn't empty - sys.stderr.write("There's already something at %s.\n" % (path,)) - sys.stderr.write("Please remove it or move it out of the way and try again.\n") - raise SystemExit, 1 - os.symlink(contents, path) - return - - if os.path.exists(path): - # There's something here, return an error - sys.stderr.write("There's already something at %s.\n" % (path,)) - sys.stderr.write("Please remove it or move it out of the way and try again.\n") - raise SystemExit, 1 - - # nothing there; go ahead and create the symlink - os.symlink(contents, path) - - -def find_ascii_shared_libs(): - cmd = "find /lib /lib64 /usr/lib /usr/lib64 -name '*.so' -type f -print 2>/dev/null | xargs file | grep -v ELF | cut -d: -f 1" - pipe = os.popen(cmd, 'r') - filenames = pipe.read().splitlines() - return filenames - - -def make_backup_copy(src): - dst = src + '.original' - if not os.path.exists(dst): - shutil.copy2(src, dst) - - -def edit_file(name): - def replace_group_body(mo): - pat = ' /(?!' + cell_root_path[1:] + ')' # negative lookahead assertion - new = re.sub(pat, ' ' + cell_root_path + '/', mo.group(2)) - return mo.group(1) + new + mo.group(3) - - f = open(name,'r') - s = f.read() - f.close() - - pat = re.compile(r'^( *GROUP *\()(.*)(\) *)$', re.M) - t = pat.sub(replace_group_body, s) - - f = open(name,'w') - f.write(t) - f.close() - - -def edit_ascii_shared_libs(): - print "Please be patient, this takes awhile..." - filenames = find_ascii_shared_libs() - for f in filenames: - make_backup_copy(f) - edit_file(f) - - -def main(): - ensure_cell() - make_symlinks() - edit_ascii_shared_libs() - - -if __name__ == '__main__': - main() - - |