configure.ac

# run autoconf to produce the configure script
AC_PREREQ([2.71])

# initialize
AC_INIT([snap],[0.4],[snap-graph-support@lists.sourceforge.net])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_SRCDIR(src/graph_kernels/breadth_first_search.c)
AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE

# get platform information
AC_CANONICAL_HOST

AC_ARG_ENABLE(debug,
        [AS_HELP_STRING([--enable-debug],[build library and binaries with extra runtime checks for debugging])], 
        enable_debug=$enableval, enable_debug=no)
if test "$enable_debug" = "yes"; then
    AC_DEFINE(SNAP_DEBUG,1,[Define to 1 to build snap with debug flags.])
fi

# check for C compiler
AC_PROG_CC

# macro for determining compiler vendor
AX_COMPILER_VENDOR

# check for libtool
LT_INIT

# override CFLAGS selection when debug option is selected
if test "${enable_debug}" = "yes"; then
	CFLAGS="-g"
fi

# add more warning flags for gcc, in debug/maintainer mode only
if test "$enable_debug" = "yes" || test "$USE_MAINTAINER_MODE" = "yes"; then
if test "${ac_test_CFLAGS}" != "set"; then
    if test "${ac_cv_c_compiler_gnu}" = "yes"; then
        CFLAGS="$CFLAGS -Wall -W -Wcast-qual -Wpointer-arith -Wcast-align -pedantic -Wno-long-long -Wshadow -Wbad-function-cast -Wwrite-strings -Wstrict-prototypes -Wredundant-decls -Wnested-externs" # -Wundef -Wconversion -Wmissing-prototypes -Wmissing-declarations
    fi
fi
fi

# check for OpenMP flags
AC_ARG_ENABLE(openmp,
        [AS_HELP_STRING([--enable-openmp],[use OpenMP directives for parallelism])],
        enable_openmp=$enableval, enable_openmp=no)
if test "$enable_openmp" = "yes"; then
    AC_DEFINE(HAVE_OPENMP,1,[Define to 1 to enable OpenMP.])
fi

if test "$enable_openmp" = "yes"; then
   AX_OPENMP([THREADLIBS=" "
     AC_DEFINE(USING_OPENMP_THREADS, 1, [Define to 1 if there is a valid OpenMP flag and the compiler supports it.])
     CFLAGS="$CFLAGS $OPENMP_CFLAGS"],
     [AC_MSG_ERROR([Unable to determine the appropriate OpenMP flag for your compiler.
         Please set the CFLAGS variable manually for OpenMP support.])])
fi

# checks for libraries
AC_CHECK_LIB(m, sin)

# header files
AC_CHECK_HEADERS([stdarg.h], [AC_DEFINE([HAVE_STDARG_H],[1],[Define to 1 if you
            have the <stdarg.h> header file.])], [], 
            [[#ifdef HAVE_STDARG_H
            #include <stdarg.h>
            #endif
            ]])
AC_CHECK_HEADERS([limits.h], [AC_DEFINE([HAVE_LIMITS_H],[1],[Define to 1 if you
            have the <limits.h> header file.])], [],
            [[#ifdef HAVE_LIMITS_H
            #include <limits.h>
            #endif
            ]])
AC_CHECK_HEADERS([unistd.h], [AC_DEFINE([HAVE_UNISTD_H],[1],[Define to 1 if you
            have the <unistd.h> header file.])], [],
            [[#ifdef HAVE_UNISTD_H
            #include <unistd.h>
            #endif
            ]])
AC_CHECK_HEADERS([math.h], [AC_DEFINE([HAVE_MATH_H],[1],[Define to 1 if you have
            the <math.h> header file.])], [], 
            [[#ifdef HAVE_MATH_H
            #include <math.h>
            #endif
            ]])


# typedefs, structures, and compiler characteristics
AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_STRUCT_TM

# check functions
AC_FUNC_MALLOC
AC_CHECK_FUNCS([gettimeofday gethrtime memset memalign log2])

# list of config files
AC_CONFIG_FILES([Makefile
                 src/Makefile
                 src/graph_generation/Makefile
                 src/graph_kernels/Makefile
                 src/graph_partitioning/Makefile
                 src/graph_metrics/Makefile
                 src/sprng2.0/Makefile
                 src/misc/Makefile
                 include/Makefile
                 lib/Makefile
                 test/Makefile
                ])
AC_OUTPUT

# print configuration output
AC_MSG_RESULT([ ])
AC_MSG_RESULT([snap successfully configured! Please verify that])
AC_MSG_RESULT([this configuration matches with your expectations.])
AC_MSG_RESULT([ ])
AC_MSG_RESULT([   User Option                         Value          ])
AC_MSG_RESULT([------------------------------------------------------])
AC_MSG_RESULT([   OpenMP support                      $enable_openmp])
AC_MSG_RESULT([   Enable debug                        $enable_debug])
AC_MSG_RESULT([])
AC_MSG_RESULT([   Compiler Configuration:])
AC_MSG_RESULT([------------------------------------------------------])
AC_MSG_RESULT([   C compiler                          $CC      ])
AC_MSG_RESULT([   Flags                               $CFLAGS  ])
AC_MSG_RESULT([])