为什么 ld 不尊重“-rpath-link”?选项?
我使用 strace 检测到这一点:
8480 execve("/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../../i486-slackware-linux/bin/ld",
[ "/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../../i486-slackware-linux/bin/ld",
...
"-L/home/bjack/lib",
...
"-rpath-link", "/root/src/firmware/Bj-bg/ab-BJ-gameprom-modules/src/dispatcher/logic",
...
"-lgame_std", "-lygor", "-ldl",
"--rpath", "/home/bjack/lib",
"-lgcc", "--as-needed", "-lgcc_s", "--no-as-needed", "-lc", "-lgcc", "--as-needed", "-lgcc_s", "--no-as-needed",
"/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/crtend.o",
"/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../crtn.o"
], [/* 26 vars */]) = 0
8480 open("/home/bjack/lib/libgame_std.so", O_RDONLY) = 12
8480 open("/home/bjack/lib/libygor.so", O_RDONLY) = -1 ENOENT (No such file or directory)
8480 open("/home/bjack/lib/libygor.a", O_RDONLY) = -1 ENOENT (No such file or directory)
我很困惑;根据手册ld首先必须尝试在-rpath-link
路径中查找。
I detect this using strace:
8480 execve("/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../../i486-slackware-linux/bin/ld",
[ "/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../../i486-slackware-linux/bin/ld",
...
"-L/home/bjack/lib",
...
"-rpath-link", "/root/src/firmware/Bj-bg/ab-BJ-gameprom-modules/src/dispatcher/logic",
...
"-lgame_std", "-lygor", "-ldl",
"--rpath", "/home/bjack/lib",
"-lgcc", "--as-needed", "-lgcc_s", "--no-as-needed", "-lc", "-lgcc", "--as-needed", "-lgcc_s", "--no-as-needed",
"/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/crtend.o",
"/usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../crtn.o"
], [/* 26 vars */]) = 0
8480 open("/home/bjack/lib/libgame_std.so", O_RDONLY) = 12
8480 open("/home/bjack/lib/libygor.so", O_RDONLY) = -1 ENOENT (No such file or directory)
8480 open("/home/bjack/lib/libygor.a", O_RDONLY) = -1 ENOENT (No such file or directory)
I'm confused; according to the manual ld at first must try to find at -rpath-link
path.
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-rpath-link
仅记录(在 ld(1) 手册页中)以影响依赖于其他共享库的共享库。由于您正在链接可执行文件,因此它要么被忽略,要么被视为另一个 -rpath。或者这可能意味着 -rpath-link 路径仅用于递归依赖项,但您在链接可执行文件时确实设置了它。无论如何,我认为它没有被使用,因为你没有一个库依赖于另一个库。
-rpath-link
is only documented (in the ld(1) man page) to affect shared libs that depend on other shared libs. Since you're linking an executable, either it's ignored or it's treated like just another -rpath. Or maybe it means that the -rpath-link path is only used for recursive dependencies, but you do set it when linking the executable.Anyway, I think it's not being used because you don't have one library depending on another.