There appears to be a somewhat bogus statement in section 6.63
"Stripping Again". It says there:
"If disk space is very tight, the --strip-all option can be used on
the binaries in /{,usr/}{bin,sbin} to gain several more megabytes. Do
not use this option on libraries—they will be destroyed."
The statement that libs will be destroyed by --strip-all may be
correct for chapter 5 libs due to the adjustments we've made (and will
yet make) in chapter 6, the nature of the varying environments.
However, by the end of chapter 6 I don't believe that statement is
true any more.
Check this out: On my system I don't have linkable ncurses libraries
or headers (the devel packages aren't installed). So I'll install them
to /usr/local/ncurses, like so:
./configure --prefix=/usr/local/ncurses --with-shared --without-debug
--enable-wide
make
sudo make install
Then I'll look at the sizes of my files:
$ ls /usr/local/ncurses/lib/ -l
total 1804
-rw-r--r-- 1 root root 136452 Oct 25 18:34 libformw.a
lrwxrwxrwx 1 root root 13 Oct 25 18:34 libformw.so -> libformw.so.5
lrwxrwxrwx 1 root root 15 Oct 25 18:34 libformw.so.5 -> libformw.so.5.9
-rwxr-xr-x 1 root root 81623 Oct 25 18:34 libformw.so.5.9
-rw-r--r-- 1 root root 70454 Oct 25 18:34 libmenuw.a
lrwxrwxrwx 1 root root 13 Oct 25 18:34 libmenuw.so -> libmenuw.so.5
lrwxrwxrwx 1 root root 15 Oct 25 18:34 libmenuw.so.5 -> libmenuw.so.5.9
-rwxr-xr-x 1 root root 39200 Oct 25 18:34 libmenuw.so.5.9
-rw-r--r-- 1 root root 175870 Oct 25 18:34 libncurses++w.a
-rw-r--r-- 1 root root 743056 Oct 25 18:34 libncursesw.a
lrwxrwxrwx 1 root root 16 Oct 25 18:34 libncursesw.so -> libncursesw.so.5
lrwxrwxrwx 1 root root 18 Oct 25 18:34 libncursesw.so.5 ->
libncursesw.so.5.9
-rwxr-xr-x 1 root root 416908 Oct 25 18:34 libncursesw.so.5.9
-rw-r--r-- 1 root root 28708 Oct 25 18:34 libpanelw.a
lrwxrwxrwx 1 root root 14 Oct 25 18:34 libpanelw.so -> libpanelw.so.5
lrwxrwxrwx 1 root root 16 Oct 25 18:34 libpanelw.so.5 -> libpanelw.so.5.9
-rwxr-xr-x 1 root root 14468 Oct 25 18:34 libpanelw.so.5.9
lrwxrwxrwx 1 root root 17 Oct 25 18:34 terminfo -> ../share/terminfo
I'll compile this file:
#include <ncursesw/ncurses.h>
int main()
{
initscr(); /* Start curses mode */
printw("Hello World !!!"); /* Print Hello World */
refresh(); /* Print it on to the real screen */
getch(); /* Wait for user input */
endwin(); /* End curses mode */
return 0;
}
like so:
gcc hello.c -I/usr/local/ncurses/include -L/usr/local/ncurses/lib/ -o
hello -lncursesw
no problem.
And the program runs OK:
LD_LIBRARY_PATH=/usr/local/ncurses/lib ./hello
Next I'll strip:
sudo strip --strip-all /usr/local/ncurses/lib/*
And look at the size of the files now:
$ ls /usr/local/ncurses/lib/ -l
total 1728
-rw-r--r-- 1 root root 81992 Oct 25 18:39 libformw.a
lrwxrwxrwx 1 root root 13 Oct 25 18:34 libformw.so -> libformw.so.5
lrwxrwxrwx 1 root root 15 Oct 25 18:34 libformw.so.5 -> libformw.so.5.9
-rwxr-xr-x 1 root root 67272 Oct 25 18:39 libformw.so.5.9
-rw-r--r-- 1 root root 41552 Oct 25 18:39 libmenuw.a
lrwxrwxrwx 1 root root 13 Oct 25 18:34 libmenuw.so -> libmenuw.so.5
lrwxrwxrwx 1 root root 15 Oct 25 18:34 libmenuw.so.5 -> libmenuw.so.5.9
-rwxr-xr-x 1 root root 32048 Oct 25 18:39 libmenuw.so.5.9
-rw-r--r-- 1 root root 72344 Oct 25 18:39 libncurses++w.a
-rw-r--r-- 1 root root 428806 Oct 25 18:39 libncursesw.a
lrwxrwxrwx 1 root root 16 Oct 25 18:34 libncursesw.so -> libncursesw.so.5
lrwxrwxrwx 1 root root 18 Oct 25 18:34 libncursesw.so.5 ->
libncursesw.so.5.9
-rwxr-xr-x 1 root root 376016 Oct 25 18:39 libncursesw.so.5.9
-rw-r--r-- 1 root root 19172 Oct 25 18:39 libpanelw.a
lrwxrwxrwx 1 root root 14 Oct 25 18:34 libpanelw.so -> libpanelw.so.5
lrwxrwxrwx 1 root root 16 Oct 25 18:34 libpanelw.so.5 -> libpanelw.so.5.9
-rwxr-xr-x 1 root root 11400 Oct 25 18:39 libpanelw.so.5.9
lrwxrwxrwx 1 root root 17 Oct 25 18:34 terminfo -> ../share/terminfo
They're obviously fine - now to make sure I can still link against them:
gcc hello.c -I/usr/local/ncurses/include -L/usr/local/ncurses/lib/ -o
hello -lncursesw
No problem - and again ensure that runtime is fine:
LD_LIBRARY_PATH=/usr/local/ncurses/lib ./hello
I don't see what has been 'destroyed' about these stripped libs.
JH
--
http://linuxfromscratch.org/mailman/listinfo/lfs-dev
FAQ: http://www.linuxfromscratch.org/faq/
Unsubscribe: See the above information page
