https://sourceware.org/bugzilla/show_bug.cgi?id=21382
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> --- Created attachment 9992 --> https://sourceware.org/bugzilla/attachment.cgi?id=9992&action=edit A patch This will introduce false reference from a shared library which isn't used otherwise. Before the change: [hjl@gnu-6 pr15146a]$ cat foo.c extern int xxx; int bar (void) { return xxx; } int main () { return 0; } [hjl@gnu-6 pr15146a]$ cat yyy.c extern void bar (void); void zzz () { bar (); } [hjl@gnu-6 pr15146a]$ cat xxx.c int xxx = 3; [hjl@gnu-6 pr15146a]$ make gcc -flto -O2 -c -o foo.o foo.c gcc -shared -fPIC -o libxxx.so xxx.c gcc -shared -fPIC -o libyyy.so yyy.c libxxx.so gcc -flto -O2 -Wl,--as-needed -o x foo.o libyyy.so -Wl,-rpath-link,. [hjl@gnu-6 pr15146a]$ after: [hjl@gnu-6 pr15146a]$ gcc -flto -O2 -Wl,--as-needed -o x foo.o libyyy.so -Wl,-rpath-link,. -B./ /tmp/ccQlE2wY.ltrans0.ltrans.o: In function `bar': <artificial>:(.text+0x2): undefined reference to `xxx' collect2: error: ld returned 1 exit status [hjl@gnu-6 pr15146a]$ Gold also failed: [hjl@gnu-6 pr15146a]$ gcc -flto -O2 -Wl,--as-needed -o x foo.o libyyy.so -Wl,-rpath-link,. -fuse-ld=gold /tmp/ccLftUeD.ltrans0.ltrans.o:<artificial>:function bar: error: undefined reference to 'xxx' collect2: error: ld returned 1 exit status [hjl@gnu-6 pr15146a]$ -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ bug-binutils mailing list bug-binutils@gnu.org https://lists.gnu.org/mailman/listinfo/bug-binutils
