Re: XCode template for lua modules
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- Subject: Re: XCode template for lua modules
- From: Doug Currie <doug.currie@...>
- Date: Fri, 3 Jul 2009 21:18:20 -0400
On Jul 3, 2009, at 11:17 AM, Hans van der Meer wrote:
Why does one prescribe for the Mach-O Type the choice
"bundle" (mh_bundle) instead of "dynamic library" (mh_dylib). Both
seem to work when the result is "require"-ed. Does it matter? Or is
there a fundamental difference I am overlooking?
As Asko said, bundle was preferred in very early os x versions.
If your Lua is built to use dlopen it can use bundles or dynamic
libraries. Lua uses dlopen when built using
-DLUA_USE_LINUX
or
-DLUA_USE_POSIX
-DLUA_USE_DLOPEN
but not when built using
-DLUA_USE_MACOSX
or
-DLUA_USE_POSIX
-DLUA_DL_DYLD
Note that if you make the macosx Lua Makefile target you get -
DLUA_USE_LINUX and therefore dlopen.
Based on the example of other libraries (thanks, Mike Pall), and my
reading of
http://developer.apple.com/documentation/DeveloperTools/Conceptual/DynamicLibraries/000-Introduction/Introduction.html#/
/apple_ref/doc/uid/TP40001908
my Makefiles use:
gcc -fPIC -dynamiclib -single_module -undefined dynamic_lookup -o
xxx.so xxx.o yyy.o
The -single_module option is considered obsolete and is the default
since OS X 10.4.0.
http://developer.apple.com/documentation/Darwin/Reference/ManPages/man1/ld.1.html
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