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AX_LLVM([llvm-libs])
Test for the existance of llvm, and make sure that it can be linked with the llvm-libs argument that is passed on to llvm-config i.e.:
llvm --libs <llvm-libs>
llvm-config will also include any libraries that are depended apon.
Andy Kitchen <agimbleinthewabe@gmail.com>
2008-04-12
AC_DEFUN([AX_LLVM], [ AC_ARG_WITH([llvm], AS_HELP_STRING([--with-llvm@<:@=DIR@:>@], [use llvm (default is yes) - it is possible to specify the root directory for llvm (optional)]), [ if test "$withval" = "no"; then want_llvm="no" elif test "$withval" = "yes"; then want_llvm="yes" ac_llvm_config_path=`which llvm-config` else want_llvm="yes" ac_llvm_config_path="$withval" fi ], [want_llvm="yes"]) succeeded=no if test -z "$ac_llvm_config_path"; then ac_llvm_config_path=`which llvm-config` fi if test "x$want_llvm" = "xyes"; then if test -e "$ac_llvm_config_path"; then LLVM_CPPFLAGS=`$ac_llvm_config_path --cxxflags` LLVM_LDFLAGS="$($ac_llvm_config_path --ldflags) $($ac_llvm_config_path --libs $1)" AC_REQUIRE([AC_PROG_CXX]) CPPFLAGS_SAVED="$CPPFLAGS" CPPFLAGS="$CPPFLAGS $LLVM_CPPFLAGS" export CPPFLAGS LDFLAGS_SAVED="$LDFLAGS" LDFLAGS="$LDFLAGS $LLVM_LDFLAGS" export LDFLAGS AC_CACHE_CHECK(can compile with and link with llvm([$1]), ax_cv_llvm, [AC_LANG_PUSH([C++]) AC_LINK_IFELSE(AC_LANG_PROGRAM([[@%:@include <llvm/Module.h> ]], [[llvm::Module *M = new llvm::Module("test"); return 0;]]), ax_cv_llvm=yes, ax_cv_llvm=no) AC_LANG_POP([C++]) ]) if test "x$ax_cv_llvm" = "xyes"; then succeeded=yes fi CPPFLAGS="$CPPFLAGS_SAVED" LDFLAGS="$LDFLAGS_SAVED" else succeeded=no fi fi if test "$succeeded" != "yes" ; then AC_MSG_ERROR([[We could not detect the llvm libraries make sure that llvm-config is on your path or specified by --with-llvm.]]) else AC_SUBST(LLVM_CPPFLAGS) AC_SUBST(LLVM_LDFLAGS) AC_DEFINE(HAVE_LLVM,,[define if the llvm library is available]) fi ])
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