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[[Features/ChangeInImplicitDSOLinking |Implicit DSO Linking ]]
Key points:
# ld will no longer automatically search in the dependencies of linked objects.
# If your project used both A and B, it will not compile unless A and B are both explicitly linked.
# There are more explanations on the Features page.


Under the new changes, if your package fails ti build with a message like:
== GCC ==


  /usr/bin/ld: gpx-parser.o: undefined reference to symbol 'acos@@GLIBC_2.0'
As of Fedora 19, GCC 4.8.x is shipped as the default GCC. In addition, all Fedora packages have been rebuilt with GCC 4.8.x (and GLIBC 2.17; see below)
  /usr/bin/ld: note: 'acos@@GLIBC_2.0' is defined in DSO /lib/libm.so.6 so try adding it to the linker command line


Then you the line that builds the specified .o needs to explicitly link libm.
Users will be able to see compiled code improvements and use the newly added features, such as improved C++11 and C11 support, improved vectorization support, etc.


More examples are [[UnderstandingDSOLinkChange |here]]
For more information on the changes in GCC 4.8.x, please see http://gcc.gnu.org/gcc-4.8/changes.html




<noinclude>[[Category:Release Notes]]<noinclude>
== GLIBC ==
[[Category:Documentation_beats]]
 
As of Fedora 19, GLIBC 2.17 is shipped as the default GLIBC. All Fedora packages have been rebuilt with GLIBC 2.17 (and GCC 4.8.x; see above).
 
For more information on the changes in GLIBC 2.17, please see http://sourceware.org/ml/libc-announce/2012/msg00001.html
 
[[Category:Docs Project]]
[[Category:Draft documentation]]
[[Category:Documentation beats]]

Revision as of 23:32, 30 April 2013

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GCC

As of Fedora 19, GCC 4.8.x is shipped as the default GCC. In addition, all Fedora packages have been rebuilt with GCC 4.8.x (and GLIBC 2.17; see below)

Users will be able to see compiled code improvements and use the newly added features, such as improved C++11 and C11 support, improved vectorization support, etc.

For more information on the changes in GCC 4.8.x, please see http://gcc.gnu.org/gcc-4.8/changes.html


GLIBC

As of Fedora 19, GLIBC 2.17 is shipped as the default GLIBC. All Fedora packages have been rebuilt with GLIBC 2.17 (and GCC 4.8.x; see above).

For more information on the changes in GLIBC 2.17, please see http://sourceware.org/ml/libc-announce/2012/msg00001.html

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