[Bug lto/50367] -flto and -Wl,--as-needed combination removes some needed libraries

[doko at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50367

Matthias Klose <doko at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |doko at gcc dot gnu.org

--- Comment #1 from Matthias Klose <doko at gcc dot gnu.org> 2011-09-19 21:14:50 UTC ---
$ cat test-flto.c 
#include <math.h>
#include <stdio.h>

int main()
{
        printf("%le\n", gamma(42));
        return 0;
}


$ gcc -Wl,--as-needed -flto test-flto.c -lm
/tmp/ccXjDUDX.ltrans0.ltrans.o: In function `main':
ccXjDUDX.ltrans0.o:(.text+0xd): undefined reference to `gamma'
collect2: ld returned 1 exit status

$ gcc -B/usr/lib/gold-ld/ -Wl,--as-needed -flto -o test-flto test-flto.c -lm
does work