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我是Ubuntu的新手，並且正在Amazon EC2雲中運行Ubuntu。在Ubuntu EC2實例上找不到libdl.so
我試圖編譯在Ubuntu上盒（i386和amd64）cppunit，它不會鏈接到libdl
g++ -g -O2 -o .libs/DllPlugInTester DllPlugInTester.o CommandLineParser.o -ldl ../../src/cppunit/.libs/libcppunit.so -lm -Wl,--rpath -Wl,/home/ubuntu/cppunit/lib
../../src/cppunit/.libs/libcppunit.so: undefined reference to `dlsym'
../../src/cppunit/.libs/libcppunit.so: undefined reference to `dlopen'
../../src/cppunit/.libs/libcppunit.so: undefined reference to `dlclose'
現在我不明白的是libdl.so存在無誤：
[email protected]:~/cppunit$ ls /lib/i386-linux-gnu/libdl*
/lib/i386-linux-gnu/libdl-2.15.so /lib/i386-linux-gnu/libdl.so.2
但whereis什麼也沒有：
[email protected]:~/cppunit$ whereis libdl
libdl:
libc6安裝：
[email protected]:~/cppunit$ sudo apt-get install libc6
Reading package lists... Done
Building dependency tree
Reading state information... Done
libc6 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
那麼，爲什麼我的構建找不到呢？
的uname -r是3.2.0-25-virtual
「正常」whereis在Fedora上看起來是這樣的：
[matt cppunit] whereis libdl
libdl: /lib/libdl.so /usr/lib/libdl.so /lib64/libdl.so /usr/lib64/libdl.so
任何想法？
編輯：我/etc/ld.so.conf.d/*.conf似乎是合理的：
[email protected]:~$ cat /etc/ld.so.conf.d/*.conf
/usr/lib/i386-linux-gnu/mesa
# Multiarch support
/lib/i386-linux-gnu
/usr/lib/i386-linux-gnu
/lib/i686-linux-gnu
/usr/lib/i686-linux-gnu
# libc default configuration
/usr/local/lib
# This directive teaches ldconfig to search in nosegneg subdirectories
# and cache the DSOs there with extra bit 1 set in their hwcap match
# fields. In Xen guest kernels, the vDSO tells the dynamic linker to
# search in nosegneg subdirectories and to match this extra hwcap bit
# in the ld.so.cache file.
hwcap 1 nosegneg
這是_exactly_我們也找到了。奇怪的是，它在32位，但不是64位。 – 2012-07-27 08:33:52