AC_INIT(mrbayes, 3.2, http://www.mrbayes.net)
AC_CONFIG_SRCDIR(mb.c)
AC_CONFIG_HEADER(config.h)
AC_PROG_CC
AC_HEADER_STDC
AC_CHECK_LIB([m], [exp])
AC_PROG_INSTALL

NOMPICC="No compiler for mpi has been found. If this is incorrect, please adjust your path and rerun configure."
AC_ARG_ENABLE(mpi, [  --enable-mpi=[no/yes]     compile the parallel version of mrbayes [default="no"]],,enable_mpi="no")
if test "x$enable_mpi" == "xyes"; then
	AC_CHECK_PROG(mpicc,mpicc,yes,no)
	if test "x$mpicc" == "xno"; then
		AC_MSG_ERROR($NOMPICC);
	fi
	AC_DEFINE(MPI_ENABLED)
fi

AC_ARG_ENABLE(fastlog, [  --enable-fastlog=[no/yes]     enable fast log operations [default="no"]],,enable_fastlog="no")
if test "x$enable_fastlog" == "xyes"; then
	AC_DEFINE(FAST_VERSION)
fi

dnl check OS 
dnl case $host in
dnl i386-*-gnu*) 
dnl     bla;;
dnl esac
AC_DEFINE(UNIX_VERSION)

dnl use c for custom tests
AC_LANG_C

dnl check readline
AC_CHECK_LIB([readline], [readline])
if test $ac_cv_lib_readline_readline = yes; then
LDFLAGS="${LDFLAGS} -lreadline"
AC_MSG_CHECKING(for rl_completion_matches function)
AC_LINK_IFELSE(
[
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>

char *f(const char *a, int f) { return "a"; }
int main() {
char *text="a";
extern char *f(const char *, int);
char **matches = rl_completion_matches (text, f);
return 0;
}
],
	AC_MSG_RESULT(yes)
	AC_DEFINE(COMPLETIONMATCHES), AC_MSG_RESULT(no)
)
fi

dnl check for 64 bit
AC_MSG_CHECKING(for 32 or 64 bits cpu)
AC_RUN_IFELSE(
[
int main() { return sizeof(long)==4?1:0; }
],
	AC_MSG_RESULT(64)
	AC_DEFINE(_64BIT), AC_MSG_RESULT(32)
)

dnl finish
if test "x$enable_mpi" == "xyes"; then
	CC=mpicc
fi

AC_ARG_ENABLE(debug, [ --enable-debug=[no/yes]     compile with debug support [default="no"]],,enable_debug="no")
if test "x$enable_debug" == "xyes"; then
	CFLAGS="-ggdb"
else
	CFLAGS="-O3 -ffast-math -Wall -DNDEBUG"
fi

AC_CONFIG_FILES([Makefile])
AC_OUTPUT