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llvm-6502/autoconf
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Patrik Hagglund 6f74b140c4 Fix for executing AutoRegen.sh. Revert a part of r187209. 
Since r187209, which modified ltdl.m4, I was unable to execute
AutoRegen.sh, getting:

  ../configure:10779: error: possibly undefined macro: AC_LTDL_FUNC_ARGZ

This commit re-adds AC_LTDL_FUNC_ARGZ to ltdl.m4, as a quick fix. For me, this
corresponds to the configure file currently checked in.

(However, the ltdl library seems to be unused since r74924 in 2009,
except for the use of the LTDL_SHLIB_EXT macro in
bugpoint(?). Therefore, the right solution seems to try to get rid of
the local ltdl.m4 file, specified by autoconf/README.TXT.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190677 91177308-0d34-0410-b5e6-96231b3b80d8
2013-09-13 10:29:42 +00:00
..
m4 Fix for executing AutoRegen.sh. Revert a part of r187209. 2013-09-13 10:29:42 +00:00
AutoRegen.sh
config.guess [PowerPC] Support powerpc64le as a syntax-checking target. 2013-07-26 01:35:43 +00:00
config.sub Add AArch64 as an experimental target. 2013-01-31 12:12:40 +00:00
configure.ac [conf] Add config variable to disable crash related overrides. 2013-08-30 20:39:21 +00:00
depcomp
ExportMap.map
install-sh
LICENSE.TXT
ltmain.sh
missing
mkinstalldirs
README.TXT

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.