[MacPorts] LibcxxOnOlderSystems modified

[MacPorts]

Page "LibcxxOnOlderSystems" was changed by jeremyhu at macports.org
Diff URL: <https://trac.macports.org/wiki/LibcxxOnOlderSystems?action=diff&version=39>
Revision 39
Changes:
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Index: LibcxxOnOlderSystems
=========================================================================
--- LibcxxOnOlderSystems (version: 38)
+++ LibcxxOnOlderSystems (version: 39)
@@ -69,7 +69,7 @@
 {{{
 sudo port -v -f uninstall inactive
 }}}
-4. Build a newer clang using libc++:
+4. Build a newer clang using libc++ (note: this will also install clang-3.7 as a build dependency):
 {{{
 sudo port -v install clang-3.8
 }}}
@@ -86,7 +86,18 @@
 sudo port -v -n upgrade --enforce-variants cctools -llvm34
 sudo port -v upgrade --enforce-variants ld64 -llvm34
 }}}
-8. Uninstall the bootstrap toolchain:
+8. Disable the variants corresponding to the older versions of ld64 in `/opt/local/etc/macports/variants.conf`.  This ensures that ld64 will be reinstalled using the appropriate variants in the future:
+{{{
+-ld64_97
+-ld64_127
+-ld64_136
+-ld64_236
+}}}
+9. Reinstall ld64 with the legacy variants disabled to use ld64-latest as the default linker (note macports-clang-3.8 fails to compile it on Snow Leopard currently, so use macports-clang-3.7):
+{{{
+sudo port -v upgrade --enforce-variants ld64 -ld64_97 -ld64_127 -ld64_136 -ld64_236 configure.compiler=macports-clang-3.7
+}}}
+10. Uninstall the bootstrap toolchain:
 {{{
 sudo port -v deactivate llvm-3.4 clang-3.4
 sudo port -v uninstall inactive
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--
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