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Nick Lewycky a89ec99fa2 Reapply patch from r62553, with a fix to avoid looking for an ffi.h that isn't 
there.

This changes the interpreter to use libffi. After this patch, the interpreter
will barely be able to call any external functions if built on a system without
libffi installed (just enough to pass 'make check' really). But with libffi,
we can now call any function that isn't variadic or taking a struct or vector
parameter (but pointer to struct is fine). Patch by Alexei Svitkine!

llvm-svn: 63723
 		2009-02-04 06:26:47 +00:00
..
m4 When looking for executable extensions, ignore .dSYM, as that's the debug info directory on Darwin. 2008-09-26 17:27:58 +00:00
AutoRegen.sh Revert accidental last patch 2008-11-20 04:28:08 +00:00
LICENSE.TXT Adding additional license information to these files. 2003-10-13 20:34:27 +00:00
README.TXT Update the auto* tools: autoconf 2.60, libtool 1.5.22, automake 1.9.6. 2006-08-04 18:18:08 +00:00
config.guess Update to latest versions of config.guess and config.sub from 2004-09-10 19:20:06 +00:00
config.sub Update to latest versions of config.guess and config.sub from 2004-09-10 19:20:06 +00:00
configure.ac Reapply patch from r62553, with a fix to avoid looking for an ffi.h that isn't 2009-02-04 06:26:47 +00:00
depcomp Ensure timestamp on saved contents of configure.ac is not changed. 2004-10-10 19:09:33 +00:00
install-sh Set the executable bit - means it can actually 2008-07-29 18:31:42 +00:00
ltmain.sh Update the auto* tools: autoconf 2.60, libtool 1.5.22, automake 1.9.6. 2006-08-04 18:18:08 +00:00
missing Ensure timestamp on saved contents of configure.ac is not changed. 2004-10-10 19:09:33 +00:00
mkinstalldirs Really get mkinstalldirs to shut up about what its doing .. who cares? 2004-10-26 05:49:38 +00:00

README.TXT 

Upgrading Libtool
===============================================================================

If you are in the mood to upgrade libtool, you must do the following:

 1. Get the new version of libtool and put it in <SRC>
 2. configure/build/install libtool with --prefix=<PFX>
 3. Copy <SRC>/ltdl.m4 to llvm/autoconf/m4
 4. Copy <PFX>/share/aclocal/libtool.m4 to llvm/autoconf/m4/libtool.m4
 5. Copy <PFX>/share/libtool/ltmain.sh to llvm/autoconf/ltmain.sh
 6. Copy <PFX>/share/libtool/libltdl/ltdl.c to llvm/lib/System
 7. Copy <PFX>/share/libtool/libltdl/ltdl.h to llvm/lib/System
 8. Edit the ltdl.h file to #include "llvm/Config/config.h" at the very top. You
    might also need to resolve some compiler warnings (typically about
    comparison of signed vs. unsigned values). But, you won't find out about 
    those until you build LLVM (step 13).
 9. Edit the llvm/autoconf/m4/libtool.m4 file so that:
    a) in AC_PROB_LIBTOOL macro, the value of LIBTOOL is set to
       $(top_builddir)/mklib, not $(top_builddir)/libtool
    b) in AC_LIBTOOL_SETUP macro, the variable default_ofile is set to 
       "mklib" instead of "libtool"
    c) s/AC_ENABLE_SHARED_DEFAULT/enable_shared_default/g
    d) s/AC_ENABLE_STATIC_DEFAULT/enable_static_default/g
    e) s/AC_ENABLE_FAST_INSTALL_DEFAULT/enable_fast_install_default/g
10. Run "autoupdate libtool.m4 ltdl.m4" in the llvm/autoconf/m4 directory.
    This should correctly update the macro definitions in the libtool m4 
    files to match the version of autoconf that LLVM uses. This converts
    AC_HELP_STRING to AS_HELP_STRING and AC_TRY_LINK to AC_LINK_IFELSE, amongst
    other things. You may need to manually adjust the files.
11. Run AutoRegen.sh to get the new macros into configure script
12. If there are any warnings from AutoRegen.sh, go to step 9.
13. Rebuild LLVM, making sure it reconfigures
14. Test the JIT which uses libltdl
15. If it all works, only THEN commit the changes.

Upgrading autoconf
===============================================================================

If you are in the mood to upgrade autoconf, you should:

 1. Consider not upgrading.
 2. No really, this is a hassle, you don't want to do it.
 3. Get the new version of autoconf and put it in <SRC>
 4. configure/build/install autoconf with --prefix=<PFX>
 5. Run autoupdate on all the m4 macros in llvm/autoconf/m4
 6. Run autoupdate on llvm/autoconf/configure.ac
 7. Regenerate configure script with AutoRegen.sh
 8. If there are any warnings from AutoRegen.sh, fix them and go to step 7.
 9. Test, test, test.