[MacPorts] LibcxxOnOlderSystems modified

[MacPorts Wiki]

Page "LibcxxOnOlderSystems" was changed by kencu
Diff URL: <https://trac.macports.org/wiki/LibcxxOnOlderSystems?action=diff&version=66>
Revision 66
Changes:
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Index: LibcxxOnOlderSystems
=========================================================================
--- LibcxxOnOlderSystems (version: 65)
+++ LibcxxOnOlderSystems (version: 66)
@@ -12,6 +12,8 @@
 At this time the MacPorts project does not build binary packages for libc++ on OS X 10.8 or earlier, so if you make this change, MacPorts will be building all ports from source.
 
 If you use MacPorts C++-using ports as dependencies for C++-using software that you compile outside of MacPorts, you must compile that software using libc++ as well.
+
+[Note: since the original writing of this article, MacPorts has developed the ability to build software against newer versions of libgcc that support c++11 (and newer) as well. This is currently undertaken by default in MacPorts. You may still wish to use libc++ as your default runtime to achieve maximal compatibility with currently-developed software, however. If so, continue with these instructions.]
 
 == Lion and Mountain Lion ==
 
@@ -61,6 +63,7 @@
 cxx_stdlib         libc++
 buildfromsource    always
 default_compilers  macports-clang-3.4 gcc-4.2 apple-gcc-4.2 gcc-4.0
+revupgrade_autorun no
 }}}
 3. Uninstall all the remaining inactive ports:
 {{{
@@ -95,19 +98,21 @@
 sudo port -v upgrade --enforce-variants ld64 -ld64_97 -ld64_127 -ld64_236
 sudo port -v deactivate ld64-127
 }}}
-10. **Experimental:** Install clang-3.9
+10. Install clang-3.9
 {{{
 sudo port -v install clang-3.9
 }}}
-11. **Experimental:** Edit `/opt/local/etc/macports/macports.conf` again to add `macports-clang-3.9` as preferred compiler:
+11. Edit `/opt/local/etc/macports/macports.conf` again to add `macports-clang-3.9` as preferred compiler, and re-enable revupgrade_autorun:
 {{{
-default_compilers macports-clang-3.9 macports-clang-3.8 macports-clang-3.7 macports-clang-3.4 gcc-4.2 apple-gcc-4.2 gcc-4.0
+default_compilers macports-clang-3.9 macports-clang-3.7 macports-clang-3.4 gcc-4.2 apple-gcc-4.2 gcc-4.0
+## delete this line you added previously ==> revupgrade_autorun  	no
 }}}
 12. Uninstall the bootstrap toolchain:
 {{{
 sudo port -v deactivate llvm-3.4 clang-3.4
 sudo port -v uninstall inactive
 }}}
+13. Snow Leopard is able to install and use versions of clang and llvm up at least 7.0 at present. Leopard is presently limited to clang-3.9.
 
 == Leopard (ppc) ==
 
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