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Yes, but the breakpoint is not in tcgetattr(). The s (Step into) wants the source.
I would expect that gdb would just skip the sysdeps function if not found.
The GDB way is to tell gdb where the sysdeps source code is, but i think must be a better way.
(gdb) s
413 tcgetattr(fd, &tty);
(gdb) s
__GI___tcgetattr (fd=3, termios_p=0x7fffffffde30)
at ../sysdeps/unix/sysv/linux/tcgetattr.c:34
34 ../sysdeps/unix/sysv/linux/tcgetattr.c: No such file or directory.
(gdb) info source
Current source file is ../sysdeps/unix/sysv/linux/tcgetattr.c
Compilation directory is /build/glibc-CVJwZb/glibc-2.27/termios
Source language is c.
Producer is GNU C11 7.5.0 -mtune=generic -march=x86-64 -g -O2 -O3 -std=gnu11 -fgnu89-inline -fmerge-all-constants -frounding-math -fstack-protector-strong -fPIC -ftls-model=initial-exec -fstack-protector-strong.
Compiled with DWARF 2 debugging format.
Does not include preprocessor macro info.
(gdb) frame 1
#1 0x000055555557556f in m_setparms (fd=3,
baudr=0x5555557866e0 <mpars+4032> "1500000",
par=0x555555786800 <mpars+4320> "N", bits=0x555555786770 <mpars+4176> "8",
stopb=0x555555786890 <mpars+4464> "1", hwf=1, swf=0) at sysdep1.c:413
413 tcgetattr(fd, &tty);
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