#27237: gcc46: checking for -exported_symbols_list linker flag... configure: error:
Link tests are not allowed after GCC_NO_EXECUTABLES.
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Reporter: ryandesign@… | Owner: mww@…
Type: defect | Status: new
Priority: Normal | Milestone:
Component: ports | Version: 1.9.2
Keywords: | Port: gcc46
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Comment(by wouter+macports@…):
This problem is caused by the newly-built libstdc++ having a different
value for the _GLIBCXX_FULLY_DYNAMIC_STRING macro than the system
libstdc++ (against which ld and friends are built), and during stage2 and
further compilation the environment being set to prefer the newly-built
libstdc++ as opposed to the system libstdc++, ''even for ld''.
This causes the problem explained here:
[http://newartisans.com/2009/10/a-c-gotcha-on-snow-leopard/#comment-893]
To add to the confusion, the conclusion made in the linked explanation
above is wrong: on Snow Leopard, _GLIBCXX_FULLY_DYNAMIC_STRING is ''not''
defined:
{{{
$ grep FULLY_DYNAMIC_STRING /usr/include/c++/4.2.1/i686-apple-
darwin10/bits/c++config.h
/* #undef _GLIBCXX_FULLY_DYNAMIC_STRING */
}}}
Therefore, this problem is fixed by:
{{{
--- Portfile.orig 2011-11-19 22:09:53.000000000 +0100
+++ Portfile 2011-11-19 22:17:45.000000000 +0100
@@ -119,7 +119,6 @@
configure.args-append --with-dwarf2
}
platform darwin 10 {
- configure.args-append --enable-fully-dynamic-string
}
platform darwin 11 {
}}}
With this change, gcc46 builds and installs successfully for me. I have no
idea what should be done for Lion, as I have no access to such a system.
Hope that helps.
--
Ticket URL: <https://trac.macports.org/ticket/27237#comment:17>
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