#                                               -*- 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])

AC_ARG_ENABLE([debug],AS_HELP_STRING([--enable-debug],[debugging level of compiler. Argument is yes or debugging level. (default is no)]),
              [enable_debugging=$enableval], [enable_debugging=no])
AC_ARG_ENABLE([optimization],AS_HELP_STRING([--enable-optimization],[Optimization level of compiler. Argument is yes or optimization. (default is 2)]),
              [enable_optimization=$enableval], [enable_optimization=2])
AC_ARG_ENABLE([warnings], AS_HELP_STRING([--enable-warnings],[Output compiler warnings, argument is none, some or full (default is some).]),
              [enable_warnings=$enableval], [enable_warnings=some])
AC_SET_COMPILER_FLAGS([$enable_optimization], [$enable_debugging], [$enable_warnings])

# 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_HEADERS([gsl/gsl_blas.h])
AC_SEARCH_LIBS(dnrm2, goto blas cblas gslblas gslcblas)
AC_CHECK_LIB(gsl, main, [], 
	[AC_SEARCH_LIBS(cblas_dnrm2, blas cblas gslblas gslcblas)])
AC_CHECK_LIB(gsl, gsl_blas_dnrm2, , [AC_MSG_ERROR(["No working BLAS found for GSL, stopping."])])

# 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_MSG_NOTICE(["CFLAGS: $CFLAGS, CXXFLAGS: $CXXFLAGS, LDFLAGS: $LDFLAGS, CC: $CC, CXX:, $CXX, MPICC: $MPICC, MPILIBS: $MPILIBS, LIBS: $LIBS"])

# test suite
AC_CONFIG_TESTDIR(tests)
AC_CONFIG_FILES([tests/atlocal tests/Makefile])
AC_CONFIG_FILES([tests/molecuilder], [chmod +x tests/molecuilder])

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