在 Alpine 上编译 host-fakeroot 时发生 Buildroot 错误

Question

Buildroot 尝试编译 host-fakeroot 时编译失败：

(...)
make[3]: Entering directory '/Builds/dev-tests/buildroot/output/build/host-fakeroot-1.36'
/usr/bin/gcc -DHAVE_CONFIG_H -I.   -I/Builds/dev-tests/buildroot/output/host/include  -O2 -I/Builds/dev-tests/buildroot/output/host/include -c -o faked.o faked.c
/bin/bash ./libtool  --tag=CC   --mode=compile /usr/bin/gcc -DHAVE_CONFIG_H -I.   -I/Builds/dev-tests/buildroot/output/host/include  -O2 -I/Builds/dev-tests/buildroot/output/host/include -c -o communicate.lo communicate.c
In file included from faked.c:98:
communicate.h:73:4: warning: #warning Not using stat64 support [-Wcpp]
   73 | #  warning Not using stat64 support
      |    ^~~~~~~
faked.c: In function 'save_database':
faked.c:624:23: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'long unsigned int' [-Wformat=]
  624 |     fprintf(f,"dev=%llx,ino=%llu,mode=%llo,uid=%llu,gid=%llu,nlink=%llu,rdev=%llu\n",
      |                    ~~~^
      |                       |
      |                       long long unsigned int
      |                    %lx
  625 |             (uint64_t) i->buf.dev,(uint64_t) i->buf.ino,(uint64_t) i->buf.mode,
      |             ~~~~~~~~~~~~~~~~~~~~~
      |             |
      |             long unsigned int

(...)

libtool: compile:  /usr/bin/gcc -DHAVE_CONFIG_H -I. -I/Builds/dev-tests/buildroot/output/host/include -O2 -I/Builds/dev-tests/buildroot/output/host/include -c libfakeroot.c  -fPIC -DPIC -o .libs/libfakeroot.o
In file included from libfakeroot.c:65:
communicate.h:73:4: warning: #warning Not using stat64 support [-Wcpp]
   73 | #  warning Not using stat64 support
      |    ^~~~~~~
libtool: link: /usr/bin/gcc -O2 -I/Builds/dev-tests/buildroot/output/host/include -Wl,-rpath -Wl,/Builds/dev-tests/buildroot/output/host/lib -o simple simple.o  -L/Builds/dev-tests/buildroot/output/host/lib -ldl
/bin/bash ./libtool  --tag=CC   --mode=compile /usr/bin/gcc -DHAVE_CONFIG_H -I.  -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -I/Builds/dev-tests/buildroot/output/host/include  -O2 -I/Builds/dev-tests/buildroot/output/host/include -c -o libfakeroot_time64_la-libfakeroot_time64.lo `test -f 'libfakeroot_time64.c' || echo './'`libfakeroot_time64.c
libfakeroot.c: In function 'common_setxattr':
**libfakeroot.c:140:33: error: implicit declaration of function 'SEND_GET_XATTR'; did you mean 'SEND_GET_XATTR64'? [-Wimplicit-function-declaration]**
  140 | #define INT_SEND_GET_XATTR(a,b) SEND_GET_XATTR(a,b,_STAT_VER)
      |                                 ^~~~~~~~~~~~~~
libfakeroot.c:1733:3: note: in expansion of macro 'INT_SEND_GET_XATTR'
 1733 |   INT_SEND_GET_XATTR(st, &xattr);
      |   ^~~~~~~~~~~~~~~~~~
make[3]: *** [Makefile:686: libfakeroot.lo] Error 1

我已经尝试了稳定的 buildroot-2024.11 和最新的 git，同样的问题。

如果我首先构建外部工具链，请应用 fakeroot debian 补丁“time64-on-32bit-archs”（来自 https://sources.debian.org/src/fakeroot/1.36-1/debian/patches/time64-on -32bit-archs/），然后编译它 - 使用外部构建的工具链，然后编译但有问题：

nm 显示一些双倍符号：

$ nm .libs/libfakeroot.a|grep -i "send_"
                     U SEND_GET_XATTR
                     U send_get_stat
                     U send_stat
    00000000000002a1 T send_fakem
    000000000000039a T send_get_fakem
    0000000000000c0d T send_get_stat
    0000000000000c9f T send_get_xattr
    0000000000000b8c T send_stat

据我了解，根本原因是因为musl前段时间去掉了‘64’后缀。

处理这个问题的最佳方法是什么？ 除了我尝试过的补丁之外，还有其他补丁吗？

Answer 1

fakeroot 源确实有问题，因为

SEND_GET_XATTR

没有在任何地方定义。

但是，通常应该定义

STAT64_SUPPORT

，因为所有较新的系统都支持 stat64。看起来

communicate.h

中尝试基于libc符号检测stat64支持的条件在musl（这是Alpine Linux使用的libc）上不起作用。

请尝试克隆 https://salsa.debian.org/clint/fakeroot，修复那里的问题，并通过将以下内容添加到

local.mk

来在 Buildroot 中进行测试：

HOST_FAKEROOT_OVERRIDE_SRCDIR=/path/to/your/fakeroot

如果修复了问题，请将补丁发送到 Debian 以包含在上游 fakeroot 中。