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Diffstat (limited to 'libstdc++-v3/doc/xml/manual/prerequisites.xml')
| -rw-r--r-- | libstdc++-v3/doc/xml/manual/prerequisites.xml | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libstdc++-v3/doc/xml/manual/prerequisites.xml b/libstdc++-v3/doc/xml/manual/prerequisites.xml index 22e90a7e79d..8799487c821 100644 --- a/libstdc++-v3/doc/xml/manual/prerequisites.xml +++ b/libstdc++-v3/doc/xml/manual/prerequisites.xml @@ -50,6 +50,56 @@ <listitem> <para> + The 'gnu' locale model makes use of <function>iconv</function> + for character set conversions. The relevant functions are provided + by Glibc and so are always available, however they can also be + provided by the separate GNU libiconv library. If GNU libiconv is + found when GCC is built (e.g., because its headers are installed + in <filename class="directory">/usr/local/include</filename>) + then the <filename>libstdc++.so.6</filename> library will have a + run-time dependency on <filename>libiconv.so.2</filename>. + If you do not want that run-time dependency then you should do + one of the following: + </para> + <itemizedlist> + <listitem> + <para> + Uninstall the libiconv headers before building GCC. + Glibc already provides <function>iconv</function> so you should + not need libiconv anyway. + </para> + </listitem> + <listitem> + <para> + <link linkend="https://www.gnu.org/software/libiconv/#downloading"> + Download</link> the libiconv sources and extract them into the + top level of the GCC source tree, e.g., + </para> +<programlisting> +wget https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.16.tar.gz +tar xf libiconv-1.16.tar.gz +ln -s libiconv-1.16 libiconv +</programlisting> + <para> + This will build libiconv as part of building GCC and link to + it statically, so there is no <filename>libiconv.so.2</filename> + dependency. + </para> + </listitem> + <listitem> + <para> + Configure GCC with <option>--with-libiconv-type=static</option>. + This requires the static <filename>libiconv.a</filename> library, + which is not installed by default. You might need to reinstall + libiconv using the <option>--enable-static</option> configure + option to get the static library. + </para> + </listitem> + </itemizedlist> + </listitem> + + <listitem> + <para> If GCC 3.1.0 or later on is being used on GNU/Linux, an attempt will be made to use "C" library functionality necessary for C++ named locale support. For GCC 4.6.0 and later, this |