configure.in

AC_INIT(src/Rllvm.h)

if test -z "${LLVM_CONFIG}" ; then
 
  AC_PATH_PROG(LLVM_CONFIG, llvm-config)

  if test -z "${LLVM_CONFIG}" ; then
    echo "cannot find llvm-config in your path. Make certain it is installed and in your path"
    exit 1;
  fi
fi


${LLVM_CONFIG} --system-libs &> /dev/null 
#LLVM_HAS_SYS_LIBS=$?
if test "$?" = "0" ; then
 LLVM_SYS_LIBS="--system-libs"
else
 LLVM_SYS_LIBS=""
fi
AC_SUBST(LLVM_SYS_LIBS)

echo "LLVM_HAS_SYS_LIBS = ${LLVM_SYS_LIBS}"

LLVM_VERSION_NUMBER=`${LLVM_CONFIG} --version | sed -e 's/svn//'`
dnl LLVM_VERSION=`${LLVM_CONFIG} --version | sed -e 's/\.[[0-9].]*//' | sed -e 's/svn//'`
dnl LLVM_MINOR_VERSION=`${LLVM_CONFIG} --version | sed -e 's/[[0-9]]\.//' | sed -e 's/svn//'`

LLVM_VERSION=`${LLVM_CONFIG} --version | sed -Ee 's/\.[[0-9]]*(\.[[0-9]]*)?//' | sed -e 's/svn//'`
LLVM_MINOR_VERSION=`${LLVM_CONFIG} --version | sed -Ee 's/[[0-9]]\.//' | sed -Ee 's/\.[[0-9]]*//' | sed -e 's/svn//'`


echo "LLVM_VERSION_NUMBER = ${LLVM_VERSION_NUMBER},  VERSION = ${LLVM_VERSION}, MINOR = ${LLVM_MINOR_VERSION}"

CXXFLAGS=`${LLVM_CONFIG} --cxxflags`
AC_LANG(C++)
AC_COMPILE_IFELSE([
AC_LANG_SOURCE(
#include <llvm/LLVMContext.h>
void foo() {
}
)], [echo "Successfully include LLVMContext.h"], 
   [CHECK_IR_DIR=1])

if test -z $CHECK_IR_DIR ; then
AC_COMPILE_IFELSE([
AC_LANG_SOURCE(
#include <llvm/LLVMContext.h>
void foo() {
}
)], [echo "Successfully include LLVMContext.h"], 
   AC_MSG_FAILURE("cannot include llvm/LLVMContext.h. Check that you have a suitable version of llvm installed."))
fi




AC_COMPILE_IFELSE([
AC_LANG_SOURCE(
#include <llvm/IR/Attributes.h>
void foo() {
  int i = (int) llvm::Attribute::NoUnwind;
}
)], [echo "New Attribute setup (> 3.2)"; NEW_LLVM_ATTRIBUTES_SETUP="-DNEW_LLVM_ATTRIBUTES_SETUP=1"], 
   [echo "Using old Attributes (<= 3.2)"; NEW_LLVM_ATTRIBUTES_SETUP=""];)


AC_COMPILE_IFELSE([
AC_LANG_SOURCE(
#include <llvm/IR/Attributes.h>
void foo() {
  int i = (int) llvm::Attribute::NoUnwind;
}
)], [echo "DataLayout.h in IR/"; LLVM_DATALAYOUT_H_IN_IR="-DLLVM_DATALAYOUT_H_IN_IR=1"], 
   [echo "Using old Attributes (<= 3.2)"; LLVM_DATALAYOUT_H_IN_IR=""];)




LLVM_TARGETS="`${LLVM_CONFIG} --targets-built`"

echo "version: $LLVM_VERSION, minor = $LLVM_MINOR_VERSION"
AC_SUBST(LLVM_CONFIG)
AC_SUBST(LLVM_VERSION_NUMBER)
AC_SUBST(LLVM_VERSION)
AC_SUBST(LLVM_MINOR_VERSION)
AC_SUBST(LLVM_TARGETS)
AC_SUBST(NEW_LLVM_ATTRIBUTES_SETUP)
AC_SUBST(LLVM_DATALAYOUT_H_IN_IR)

echo ""
echo "*** llvm-config ${LLVM_CONFIG}"
echo ""

if test -r R/targets.R ; then
 chmod  +w R/targets.R
fi

AC_OUTPUT(src/Makevars)
AC_OUTPUT(R/targets.R)
AC_OUTPUT(R/llvmVersion.R)
chmod  -w R/targets.R


echo "`${LLVM_CONFIG} --cxxflags --ldflags`"