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

AC_PREREQ([2.69])
AC_INIT([libbrandt], [0.1], [teichm@net.in.tum.de])

AM_INIT_AUTOMAKE([1.15])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

AC_CONFIG_SRCDIR([brandt.c])
#AC_CONFIG_HEADERS([config.h])

# Checks for programs.
AC_PROG_CC_C99
LT_INIT([pic-only])

# fix std
CC=$(echo "${CC}" | sed 's/-std=gnu99/-std=c99/')
CPP=$(echo "${CPP}" | sed 's/-std=gnu99/-std=c99/')

# Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_SIZE_T
AC_TYPE_UINT16_T

# Checks for libraries.
AC_SEARCH_LIBS([gcry_check_version], [gcrypt], [], [AC_MSG_ERROR([unable to find the gcry_check_version() function from libgcrypt])])

# Checks for header files.
AC_CHECK_HEADER(gcrypt.h, [], [AC_MSG_ERROR([unable to find the gcrypt.h header file from libgcrypt])], [])

SAVE_LIBS=$LIBS
gnunetutil=0
AC_MSG_CHECKING(for libgnunetutil)
AC_ARG_WITH(gnunetutil,
   [  --with-gnunetutil=PFX   base of libgnunetutil installation],
   [AC_MSG_RESULT([$with_gnunetutil])
    case $with_gnunetutil in
      no)
        ;;
      yes)
        AC_CHECK_HEADERS(gnunet/gnunet_util_lib.h,
          AC_CHECK_LIB([gnunetutil], [GNUNET_CRYPTO_ecc_dlog],
            gnunetutil=1))
        ;;
      *)
        LDFLAGS="-L$with_gnunetutil/lib $LDFLAGS"
        CPPFLAGS="-I$with_gnunetutil/include $CPPFLAGS"
        AC_CHECK_HEADERS(gnunet/gnunet_util_lib.h,
          AC_CHECK_LIB([gnunetutil], [GNUNET_CRYPTO_ecc_dlog],
            EXT_LIB_PATH="-L$with_gnunetutil/lib $EXT_LIB_PATH"
            gnunetutil=1))
        ;;
    esac
   ],
   [AC_MSG_RESULT([--with-gnunetutil not specified])
    AC_CHECK_HEADERS(gnunet/gnunet_util_lib.h,
     AC_CHECK_LIB([gnunetutil], [GNUNET_CRYPTO_ecc_dlog],
      gnunetutil=1))])
if test x$gnunetutil = x1
then
 AC_MSG_RESULT([libgnunetutil found])
else
 AC_MSG_ERROR([libbrandt requires libgnunetutil])
fi
# restore LIBS
LIBS=$SAVE_LIBS

AC_CONFIG_FILES([
Makefile
doc/Makefile
])
AC_OUTPUT