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

AC_PREREQ(2.59)
AC_INIT(Molecuilder, 1.0, heber@ins.uni-bonn.de, molecuilder)
AC_CONFIG_AUX_DIR(config)
AC_CONFIG_SRCDIR([src/builder.cpp])
AC_CONFIG_HEADER([config.h])

AM_INIT_AUTOMAKE(dist-bzip2)

# Checks for programs.
AC_PROG_CXX
AC_PROG_CC
AM_MISSING_PROG([DOXYGEN], [doxygen])


# Checks for libraries.
AC_CHECK_LIB(m, sqrt, ,AC_MSG_ERROR([compatible libc math library not found]))

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([sys/time.h])
AC_HEADER_STDBOOL

AC_FUNC_MALLOC
AC_FUNC_REALLOC
AC_CHECK_FUNCS([floor pow sqrt strchr])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_C_RESTRICT
AC_TYPE_SIZE_T

# Checks for library functions.
# check for GNU Scientific Library
AC_CHECK_LIB(m,main)
AC_CHECK_LIB(gslcblas,main)
AC_CHECK_LIB(gsl,main)

# debugging info
AC_ARG_ENABLE([debug],AS_HELP_STRING([--enable-debug],[Output debugging information, argument is yes or debugging level (default is no).]),
              [enable_debug=$enableval], [enable_debug=no])
if ! test x"$enable_debug" = xno; then
	if test x"${enable_debug}" = xyes; then
		CFLAGS="-g3"
		CXXFLAGS="-g3"
	else
		CFLAGS="-g${enable_debug}"
		CXXFLAGS="-g${enable_debug}"
	fi
  AC_DEFINE(HAVE_DEBUG,1, ["Output debugging info"])
  AC_SUBST(HAVE_DEBUG)
fi

# optimization level
AC_ARG_ENABLE([optimization],AS_HELP_STRING([--enable-optimization],[Optimization level of compiler. Argument is yes or debugging level. (default is 2)]),
              [enable_optimization=$enableval], [enable_optimization=yes])
if test ! x"$enable_optimization" = xno; then
	if test x"$enable_debug" = xno; then
		if test x"${enable_optimization}" = xyes; then
			CFLAGS="-O2"
			CXXFLAGS="-O2"
		else
			CFLAGS="-O${enable_optimization}"
			CXXFLAGS="-O${enable_optimization}"
		fi
	else
		AC_MSG_WARN(["Already specified --enable-debug!"])
	fi
fi

# add replacement/saturation hydrogen or not 
AC_ARG_ENABLE([hydrogen],AS_HELP_STRING([--enable-hydrogen],[Adding saturation hydrogen (default is yes)]),
              [enable_hydrogen=$enableval], [enable_hydrogen=yes])
if test x"$enable_hydrogen" = xyes; then
  AC_DEFINE(ADDHYDROGEN,1, ["Adding saturation hydrogen"])
  AC_SUBST(ADDHYDROGEN)
fi

# Check for "extern inline", using a modified version
# of the test for AC_C_INLINE from acspecific.mt
AC_CACHE_CHECK([for extern inline], ac_cv_c_extern_inline,
[ac_cv_c_extern_inline=no
AC_TRY_COMPILE([extern $ac_cv_c_inline double foo(double x);
extern $ac_cv_c_inline double foo(double x) { return x+1.0; };
double foo (double x) { return x + 1.0; };], 
[  foo(1.0)  ],
[ac_cv_c_extern_inline="yes"])
])

if test "$ac_cv_c_inline" != no ; then
  AC_DEFINE(HAVE_INLINE,1, ["May use inline routines"])
  AC_SUBST(HAVE_INLINE)
fi

AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile])
AC_OUTPUT