#1395: let ./configure check for a GNUreadline framework
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Reporter: [EMAIL PROTECTED] | Owner:
Type: feature request | Status: reopened
Priority: normal | Milestone: 6.8 branch
Component: Build System | Version: 6.8
Severity: normal | Resolution:
Keywords: | Difficulty: Easy (1 hr)
Testcase: | Architecture: Multiple
Os: MacOS X |
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Comment (by judah):
Replying to [comment:5 guest]:
> Interesting question. I've created the mac binary dists with a local
GNUreadline framework. I hope my home directory wasn't left as framework
search path in the ghc-6.6.1 binary. "man ld" on Mac did not give me a
clue about this. (There's nothing like a RUN_LIBRARY_PATH.)
>
I did some research, and figured out what's going on. Loading at runtime
is handled by {{{dyld}}}, not {{{ld}}}; in fact, the {{{-F}}} flag is
irrelevant to how {{{dyld}}} works. Instead, it uses the environmental
variables {{{DYLD_FRAMEWORK_PATH}}} and
{{{DYLD_FALLBACK_FRAMEWORK_PATH}}}. The latter defaults to searching
{{{$HOME/Library/Frameworks}}} as well as {{{/Library/Frameworks}}} et.
al.
As a result, binaries can always load frameworks stored in either the home
or root locations, regardless of the flags passed to the compiler at build
time.
See my page [wiki:OSXFrameworks] for more info.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1395#comment:12>
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