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faq.xml (a-how_to_set_paths): Expand FAQ answer.

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* doc/xml/faq.xml (a-how_to_set_paths): Expand FAQ answer.
	* doc/xml/manual/abi.xml (abi.versioning.history): Correct symver.

From-SVN: r206960
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Jonathan Wakely 2014-01-23 12:29:40 +00:00 committed by Jonathan Wakely
parent 2196a8859b
commit 1f0affcecc
3 changed files with 39 additions and 5 deletions
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5
libstdc++-v3/ChangeLog
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@ -1,3 +1,8 @@
2014-01-23 Jonathan Wakely <jwakely@redhat.com>
* doc/xml/faq.xml (a-how_to_set_paths): Expand FAQ answer.
* doc/xml/manual/abi.xml (abi.versioning.history): Correct symver.
2014-01-22 Jonathan Wakely <jwakely@redhat.com>
* include/bits/stl_deque.h (_Deque_impl): Move comment.

33
libstdc++-v3/doc/xml/faq.xml
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@ -358,7 +358,30 @@
executable is run the linker finds and loads the required shared
libraries by searching a pre-configured list of directories. If
the directory where you've installed libstdc++ is not in this list
then the libraries won't be found. The simplest way to fix this is
then the libraries won't be found.
</para>
<para>
If you already have an older version of libstdc++ installed then the
error might look like one of the following instead:
</para>
<screen>
./a.out: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.20' not found
./a.out: /usr/lib/libstdc++.so.6: version `CXXABI_1.3.8' not found
</screen>
<para>
This means the linker found <filename>/usr/lib/libstdc++.so.6</filename>
but that library belongs to an older version of GCC than was used to
compile and link the program <filename>a.out</filename> (or some part
of it). The program depends on code defined in the newer libstdc++
that belongs to the newer version of GCC, so the linker must be told
how to find the newer libstdc++ shared library.
</para>
<para>
The simplest way to fix this is
to use the <literal>LD_LIBRARY_PATH</literal> environment variable,
which is a colon-separated list of directories in which the linker
will search for shared libraries:
@ -370,6 +393,11 @@
</screen>
<para>
Here the shell variable <command>${prefix}</command> is assumed to contain
the directory prefix where GCC was installed to. The directory containing
the library might depend on whether you want the 32-bit or 64-bit copy
of the library, so for example would be
<filename>${prefix}/lib64</filename> on some systems.
The exact environment variable to use will depend on your
platform, e.g. DYLD_LIBRARY_PATH for Darwin,
LD_LIBRARY_PATH_32/LD_LIBRARY_PATH_64 for Solaris 32-/64-bit
@ -379,7 +407,8 @@
See the man pages for <command>ld</command>, <command>ldd</command>
and <command>ldconfig</command> for more information. The dynamic
linker has different names on different platforms but the man page
is usually called something such as <filename>ld.so/rtld/dld.so</filename>.
is usually called something such as <filename>ld.so</filename>,
<filename>rtld</filename> or <filename>dld.so</filename>.
</para>
<para>
Using LD_LIBRARY_PATH is not always the best solution, <link linkend="manual.intro.using.linkage.dynamic">Finding Dynamic or Shared

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libstdc++-v3/doc/xml/manual/abi.xml
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@ -328,7 +328,7 @@ compatible.
<listitem><para>GCC 4.7.0: GLIBCXX_3.4.17, CXXABI_1.3.6</para></listitem>
<listitem><para>GCC 4.8.0: GLIBCXX_3.4.18, CXXABI_1.3.7</para></listitem>
<listitem><para>GCC 4.8.3: GLIBCXX_3.4.19, CXXABI_1.3.7</para></listitem>
<listitem><para>GCC 4.9.0: GLIBCXX_3.4.20, CXXABI_1.3.7</para></listitem>
<listitem><para>GCC 4.9.0: GLIBCXX_3.4.20, CXXABI_1.3.8</para></listitem>
</itemizedlist>
</listitem>