| 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. |