llvm-mirror

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History

Eric Christopher 381ec749e0 Move the AC_PROG_CC checks earlier in the configure file. The lateness of the original check meant that configure was caching the default CC check and using that instead of the result of AC_PROG_CC in both configure checks and during compilation. This wasn't affecting C++ so it was hard to notice. Regenerate configure. llvm-svn: 139937		2011-09-16 20:36:25 +00:00
..
m4	Fix a ton of comment typos found by codespell. Patch by	2011-04-15 05:18:47 +00:00
AutoRegen.sh	Leave a pointer to the documentation so that people don't end up change one but	2009-09-27 04:57:35 +00:00
config.guess	Update config.sub, config.guess and configure.	2011-08-23 06:43:49 +00:00
config.sub	Update config.sub, config.guess and configure.	2011-08-23 06:43:49 +00:00
configure.ac	Move the AC_PROG_CC checks earlier in the configure file. The lateness	2011-09-16 20:36:25 +00:00
depcomp
ExportMap.map	fix PR5954, patch by Roman Divacky.	2010-02-24 22:33:41 +00:00
install-sh	Set the executable bit - means it can actually	2008-07-29 18:31:42 +00:00
LICENSE.TXT
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
mkinstalldirs	Really get mkinstalldirs to shut up about what its doing .. who cares?	2004-10-26 05:49:38 +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

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.