On Fri, Jul 24, 2020 at 10:11:04AM +0100, Simon McVittie wrote: > The bug (#966150) is that a version of uix86_64.so compiled with a slightly > older (2020-02-18) toolchain fails to load on an up-to-date sid system, with: > undefined symbol: __atan2_finite
Because the binary was not linked with -lm, the linker never saw the real symbol __atan2_finite@GLIBC2_16, so the linke only emitted a reference to __atan2_finite. At least dpkg-shlibdeps or so should warn about that. > I've been trying to put together a standalone reproducer that only uses > libdl and libm, but so far I have not been successful. Something like that? | % cat test.c | void __atan2_finite(void); | void test(void) { | __atan2_finite(); | } | % gcc --shared -o test.so test.c -Wall -W | % objdump -x test.so | grep atan | 0000000000000000 *UND* 0000000000000000 __atan2_finite Regards, Bastian -- Men will always be men -- no matter where they are. -- Harry Mudd, "Mudd's Women", stardate 1329.8