#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ([2.69])

AC_INIT([sPuReMD], [1.0], [ohearnku@msu.edu hma@msu.edu])
: ${CFLAGS=""}
AM_INIT_AUTOMAKE([1.15 subdir-objects -Wall -Werror foreign])
# Enable silent build rules by default.
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])], [AC_SUBST([AM_DEFAULT_VERBOSITY],[1])])
#LT_PREREQ([2.2])
#LT_INIT([dlopen])

AC_LANG([C])

AC_CONFIG_SRCDIR([src/traj.h])
AC_CONFIG_HEADERS([src/config.h])

# Checks for programs.
AC_PROG_CC([icc gcc cc])
AC_PROG_CPP

# Checks for libraries.
AC_SEARCH_LIBS([exp], [m])
AC_SEARCH_LIBS([sqrt], [m])
AC_SEARCH_LIBS([pow], [m])
AC_SEARCH_LIBS([acos], [m])
AC_SEARCH_LIBS([cos], [m])
AC_SEARCH_LIBS([sin], [m])
AC_SEARCH_LIBS([tan], [m])
AC_SEARCH_LIBS([fabs], [m])
AC_SEARCH_LIBS([gzopen], [z])
AC_SEARCH_LIBS([gzeof], [z])
AC_SEARCH_LIBS([gzgets], [z])
AC_SEARCH_LIBS([gzseek], [z])
AC_SEARCH_LIBS([gzclose], [z])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_INLINE
AC_CHECK_TYPES([gzFile], [], [AC_MSG_FAILURE([gzFile type not found in zlib.h], [1])], [#include<zlib.h>])

# Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_STRTOD
AC_CHECK_FUNCS([gettimeofday memset])

# Check for compiler vendor
AX_COMPILER_VENDOR
if test "x$ax_cv_c_compiler_vendor" = "xgnu"; then
	CFLAGS="$CFLAGS -Wall -O3 -funroll-loops -fstrict-aliasing"
fi
if test "x$ax_cv_c_compiler_vendor" = "xintel"; then
	CFLAGS="$CFLAGS -fast -Mipa=fast,inline"
fi

# Check for OpenMP support.
if test "x$BUILD_OPENMP" = "xyes"; then
	AC_OPENMP
	if test "x${OPENMP_CFLAGS}" = "x"; then
		AC_MSG_WARN([
	  -----------------------------------------------
	   Unable to find OpenMP support on this system.
	   Building a single-threaded version.
	  -----------------------------------------------])
	else
		AC_SUBST(AM_CFLAGS, "$OPENMP_CFLAGS")
	fi
fi

if test "x$BUILD_SUPERLU_MT" != "x"
then
	CPPFLAGS="${CPPFLAGS} -I${BUILD_SUPERLU_MT}/include"
	LDFLAGS="${LDFLAGS} -L${BUILD_SUPERLU_MT}/lib"
	#TODO: implement better BLAS detection
	LIBS="${LIBS} -lblas"
#	BLAS_FOUND_LIBS="yes"
#	AC_SEARCH_LIBS([dtrsv_], [blas blas_OPENMP],
#		        [], [BLAS_FOUND_LIBS="no"], [])
#	AS_IF([test "x${BLAS_FOUND_LIBS}" != "xyes"],
#	      [AC_MSG_ERROR([Unable to find BLAS library.])])
	AC_CHECK_HEADERS([slu_mt_ddefs.h], [SUPERLU_MT_FOUND_HEADERS="yes"])
	AS_IF([test "x${SUPERLU_MT_FOUND_HEADERS}" != "xyes"],
	      [AC_MSG_ERROR([Unable to find SuperLU MT headers.])])
	SUPERLU_MT_FOUND_LIBS="yes"
	#TODO: fix issue where multiple -l flags added, one for each call below
	AC_SEARCH_LIBS([intMalloc], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp])
	AC_SEARCH_LIBS([get_perm_c], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp])
	AC_SEARCH_LIBS([pdgstrf_init], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp -lblas -lblas_OPENMP])
	AC_SEARCH_LIBS([pdgstrf], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp -lblas -lblas_OPENMP])
	AC_SEARCH_LIBS([pxgstrf_finalize], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp -lblas -lblas_OPENMP])
	AC_SEARCH_LIBS([StatAlloc], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp])
	AC_SEARCH_LIBS([StatInit], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp])
	AC_SEARCH_LIBS([StatFree], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp])
	AC_SEARCH_LIBS([Destroy_SuperNode_SCP], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp])
	AC_SEARCH_LIBS([Destroy_CompCol_NCP], [superlu_mt superlu_mt_OPENMP],
		        [], [SUPERLU_MT_FOUND_LIBS="no"], [-lgomp])
	AS_IF([test "x${SUPERLU_MT_FOUND_LIBS}" != "xyes"],
	      [AC_MSG_ERROR([Unable to find SuperLU MT library.])])
	AC_DEFINE([HAVE_SUPERLU_MT], [1], [Define to 1 if you have SuperLU_MT support enabled.])
fi

AC_CONFIG_FILES([Makefile])

AC_OUTPUT