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using the minimum possible number of bytes. For little endian targets run on little endian machines, apints are stored in memory from LSB to MSB as before. For big endian targets on big endian machines they are stored from MSB to LSB which wasn't always the case before (if the target and host endianness doesn't match values are stored according to the host's endianness). Doing this requires knowing the endianness of the host, which is determined when configuring - thanks go to Anton for this. Only having access to little endian machines I was unable to properly test the big endian part, which is also the most complicated... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44796 91177308-0d34-0410-b5e6-96231b3b80d8 |
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| .. | ||
| m4 | ||
| AutoRegen.sh | ||
| config.guess | ||
| config.sub | ||
| configure.ac | ||
| depcomp | ||
| install-sh | ||
| LICENSE.TXT | ||
| ltmain.sh | ||
| missing | ||
| mkinstalldirs | ||
| 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.