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| author | Jeffrey Yasskin <jyasskin@google.com> | 2010-02-18 02:36:02 +0000 |
|---|---|---|
| committer | Jeffrey Yasskin <jyasskin@google.com> | 2010-02-18 02:36:02 +0000 |
| commit | f6afae2f49ed65a6a482257c7e55520857d751b7 (patch) | |
| tree | 3cdfe6a7431398a707157c86927577fb0908f5cc /autoconf | |
| parent | 89bb7b56407bf81a5d5fdcdac7106d94bb30dd65 (diff) | |
| download | external_llvm-f6afae2f49ed65a6a482257c7e55520857d751b7.zip external_llvm-f6afae2f49ed65a6a482257c7e55520857d751b7.tar.gz external_llvm-f6afae2f49ed65a6a482257c7e55520857d751b7.tar.bz2 | |
Add a shared library for LLVM, named libLLVM2.7svn.(so|dylib), and add an
--enable-shared configure flag to have the tools linked shared. (2.7svn is just
$(LLVMVersion) so it'll change to "2.7" in the release.) Always link the
example programs shared to test that the shared library keeps working.
On my mac laptop, Debug libLLVM2.7svn.dylib is 39MB, and opt (for example) is
16M static vs 440K shared.
Two things are less than ideal here:
1) The library doesn't include any version information. Since we expect to break
the ABI with every release, this shouldn't be much of a problem. If we do
release a compatible 2.7.1, we may be able to hack its library to work with
binaries compiled against 2.7.0, or we can just ask them to recompile. I'm
hoping to get a real packaging expert to look at this for the 2.8 release.
2) llvm-config doesn't yet have an option to print link options for the shared
library. I'll add this as a subsequent patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96559 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'autoconf')
| -rw-r--r-- | autoconf/configure.ac | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/autoconf/configure.ac b/autoconf/configure.ac index 40f77d8..01ba197 100644 --- a/autoconf/configure.ac +++ b/autoconf/configure.ac @@ -470,6 +470,18 @@ esac AC_DEFINE_UNQUOTED([ENABLE_PIC],$ENABLE_PIC, [Define if position independent code is enabled]) +dnl Allow linking tools against the shared library. +AC_ARG_ENABLE(shared, + AS_HELP_STRING([--enable-shared], + [Link LLVM tools shared (default is NO)]),, + enableval=default) +case "$enableval" in + yes) AC_SUBST(ENABLE_SHARED,[1]) ;; + no) AC_SUBST(ENABLE_SHARED,[0]) ;; + default) AC_SUBST(ENABLE_SHARED,[0]) ;; + *) AC_MSG_ERROR([Invalid setting for --enable-shared. Use "yes" or "no"]) ;; +esac + dnl Allow specific targets to be specified for building (or not) TARGETS_TO_BUILD="" AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-targets], @@ -1265,6 +1277,10 @@ dnl Propagate the shared library extension that the libltdl checks did to dnl the Makefiles so we can use it there too AC_SUBST(SHLIBEXT,$libltdl_cv_shlibext) +dnl Propagate the run-time library path variable that the libltdl +dnl checks found to the Makefiles so we can use it there too +AC_SUBST(SHLIBPATH_VAR,$libltdl_cv_shlibpath_var) + # Translate the various configuration directories and other basic # information into substitutions that will end up in Makefile.config.in # that these configured values can be used by the makefiles |