| Misha Brukman | b3a734a | 2004-10-13 01:07:55 +0000 | [diff] [blame] | 1 | Upgrading Libtool |
| Reid Spencer | 8baa775 | 2004-11-29 12:28:47 +0000 | [diff] [blame] | 2 | =============================================================================== |
| Misha Brukman | b3a734a | 2004-10-13 01:07:55 +0000 | [diff] [blame] | 3 | |
| 4 | If you are in the mood to upgrade libtool, you must do the following: |
| 5 | |
| Reid Spencer | 8baa775 | 2004-11-29 12:28:47 +0000 | [diff] [blame] | 6 | 1. Get the new version of libtool and put it in <SRC> |
| 7 | 2. configure/build/install libtool with --prefix=<PFX> |
| 8 | 3. Copy <SRC>/ltdl.m4 to llvm/autoconf/m4 |
| 9 | 4. Copy <PFX>/share/aclocal/libtool.m4 to llvm/autoconf/m4/libtool.m4 |
| 10 | 5. Copy <PFX>/share/libtool/ltmain.sh to llvm/autoconf/ltmain.sh |
| Reid Spencer | a773bd5 | 2006-08-04 18:18:08 +0000 | [diff] [blame] | 11 | 6. Copy <PFX>/share/libtool/libltdl/ltdl.c to llvm/lib/System |
| 12 | 7. Copy <PFX>/share/libtool/libltdl/ltdl.h to llvm/lib/System |
| 13 | 8. Edit the ltdl.h file to #include "llvm/Config/config.h" at the very top. You |
| 14 | might also need to resolve some compiler warnings (typically about |
| 15 | comparison of signed vs. unsigned values). But, you won't find out about |
| 16 | those until you build LLVM (step 13). |
| 17 | 9. Edit the llvm/autoconf/m4/libtool.m4 file so that: |
| 18 | a) in AC_PROB_LIBTOOL macro, the value of LIBTOOL is set to |
| 19 | $(top_builddir)/mklib, not $(top_builddir)/libtool |
| 20 | b) in AC_LIBTOOL_SETUP macro, the variable default_ofile is set to |
| 21 | "mklib" instead of "libtool" |
| 22 | c) s/AC_ENABLE_SHARED_DEFAULT/enable_shared_default/g |
| 23 | d) s/AC_ENABLE_STATIC_DEFAULT/enable_static_default/g |
| 24 | e) s/AC_ENABLE_FAST_INSTALL_DEFAULT/enable_fast_install_default/g |
| Reid Spencer | e32beb7 | 2004-12-24 00:15:20 +0000 | [diff] [blame] | 25 | 10. Run "autoupdate libtool.m4 ltdl.m4" in the llvm/autoconf/m4 directory. |
| Reid Spencer | 8baa775 | 2004-11-29 12:28:47 +0000 | [diff] [blame] | 26 | This should correctly update the macro definitions in the libtool m4 |
| 27 | files to match the version of autoconf that LLVM uses. This converts |
| 28 | AC_HELP_STRING to AS_HELP_STRING and AC_TRY_LINK to AC_LINK_IFELSE, amongst |
| 29 | other things. You may need to manually adjust the files. |
| Reid Spencer | e32beb7 | 2004-12-24 00:15:20 +0000 | [diff] [blame] | 30 | 11. Run AutoRegen.sh to get the new macros into configure script |
| Reid Spencer | a773bd5 | 2006-08-04 18:18:08 +0000 | [diff] [blame] | 31 | 12. If there are any warnings from AutoRegen.sh, go to step 9. |
| 32 | 13. Rebuild LLVM, making sure it reconfigures |
| Reid Spencer | e32beb7 | 2004-12-24 00:15:20 +0000 | [diff] [blame] | 33 | 14. Test the JIT which uses libltdl |
| 34 | 15. If it all works, only THEN commit the changes. |
| Reid Spencer | 8baa775 | 2004-11-29 12:28:47 +0000 | [diff] [blame] | 35 | |
| 36 | Upgrading autoconf |
| 37 | =============================================================================== |
| 38 | |
| 39 | If you are in the mood to upgrade autoconf, you should: |
| 40 | |
| 41 | 1. Consider not upgrading. |
| 42 | 2. No really, this is a hassle, you don't want to do it. |
| 43 | 3. Get the new version of autoconf and put it in <SRC> |
| 44 | 4. configure/build/install autoconf with --prefix=<PFX> |
| 45 | 5. Run autoupdate on all the m4 macros in llvm/autoconf/m4 |
| 46 | 6. Run autoupdate on llvm/autoconf/configure.ac |
| 47 | 7. Regenerate configure script with AutoRegen.sh |
| Reid Spencer | a773bd5 | 2006-08-04 18:18:08 +0000 | [diff] [blame] | 48 | 8. If there are any warnings from AutoRegen.sh, fix them and go to step 7. |
| Reid Spencer | 8baa775 | 2004-11-29 12:28:47 +0000 | [diff] [blame] | 49 | 9. Test, test, test. |