dnl Copyright (C) 2005-2006 IOhannes m zmölnig
dnl This file is free software; IOhannes m zmölnig
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

# AC_CHECK_CPPFLAGS(ADDITIONAL-CPPFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
#
# checks whether the $(C) compiler accepts the ADDITIONAL-CPPFLAGS
# if so, they are added to the CPPFLAGS
AC_DEFUN([AC_CHECK_CPPFLAGS],
[
  AC_MSG_CHECKING([whether $CPP accepts "$1"])
  temp_check_cppflags="${CPPFLAGS}"
  CPPFLAGS="$1 ${CPPFLAGS}"
  AC_PREPROC_IFELSE(
        [AC_LANG_SOURCE([[int main(void){return 0;}]])],
        [AC_MSG_RESULT([yes])],
        [AC_MSG_RESULT([no]); CPPFLAGS="${temp_check_cppflags}"])
])# AC_CHECK_CPPFLAGS



# AC_CHECK_CFLAGS(ADDITIONAL-CFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
#
# checks whether the $(C) compiler accepts the ADDITIONAL-CFLAGS
# if so, they are added to the CFLAGS
AC_DEFUN([AC_CHECK_CFLAGS],
[
  AC_MSG_CHECKING([whether $CC accepts "$1"])
cat > conftest.c << EOF
int main(){
  return 0;
}
EOF
if $CC $CFLAGS [$1] -o conftest.o conftest.c > /dev/null 2>&1
then
  AC_MSG_RESULT([yes])
  CFLAGS="${CFLAGS} [$1]"
  AC_CHECK_CPPFLAGS([$1])
  [$2]
else
  AC_MSG_RESULT([no])
  [$3]
fi
])# AC_CHECK_CFLAGS

# AC_CHECK_CXXFLAGS(ADDITIONAL-CXXFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
#
# checks whether the $(CXX) (c++) compiler accepts the ADDITIONAL-CXXFLAGS
# if so, they are added to the CXXFLAGS
AC_DEFUN([AC_CHECK_CXXFLAGS],
[
  AC_MSG_CHECKING([whether $CXX accepts "$1"])
cat > conftest.c++ << EOF
int main(){
  return 0;
}
EOF
if $CXX $CPPFLAGS $CXXFLAGS -o conftest.o conftest.c++ [$1] > /dev/null 2>&1
then
  AC_MSG_RESULT([yes])
  CXXFLAGS="${CXXFLAGS} [$1]"
  AC_CHECK_CPPFLAGS([$1])
  [$2]
else
  AC_MSG_RESULT([no])
  [$3]
fi
])# AC_CHECK_CXXFLAGS

# AC_CHECK_FRAMEWORK(FRAMEWORK, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
#
#
AC_DEFUN([AC_CHECK_FRAMEWORK],
[
  AC_MSG_CHECKING([for "$1"-framework])

  temp_check_ldflags_org="${LDFLAGS}"
  LDFLAGS="-framework [$1] ${LDFLAGS}"

  AC_LINK_IFELSE(AC_LANG_PROGRAM(,), [temp_check_ldflags_success="yes"],[temp_check_ldflags_success="no"])

  if test "x$temp_check_ldflags_success" = "xyes"; then
    AC_MSG_RESULT([yes])
    [$2]
  else
    AC_MSG_RESULT([no])
    LDFLAGS="$temp_check_ldflags_org"
    [$3]
  fi
])# AC_CHECK_FRAMEWORK

# AC_CHECK_LDFLAGS(ADDITIONAL-LDFLAGS, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
#
# checks whether the $(LD) linker accepts the ADDITIONAL-LDFLAGS
# if so, they are added to the LDFLAGS
AC_DEFUN([AC_CHECK_LDFLAGS],
[
  AC_MSG_CHECKING([whether linker accepts "$1"])
  temp_check_ldflags_org="${LDFLAGS}"
  LDFLAGS="$1 ${LDFLAGS}"

  AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])], [temp_check_ldflags_success="yes"],[temp_check_ldflags_success="no"])

  if test "x$temp_check_ldflags_success" = "xyes"; then
    AC_MSG_RESULT([yes])
    [$2]
  else
    AC_MSG_RESULT([no])
    LDFLAGS="$temp_check_ldflags_org"
    [$3]
  fi
])# AC_CHECK_LDFLAGS


AC_DEFUN([AC_CHECK_FAT],
[
AC_ARG_ENABLE(fat-binary,
       [  --enable-fat-binary=ARCHS
                          build an Apple Multi Architecture Binary (MAB);
                          ARCHS is a comma-delimited list of architectures for
                          which to build; if ARCHS is omitted, then the package
                          will be built for all architectures supported by the
                          platform (e.g. "ppc,i386" for MacOS/X and Darwin; 
                          if this option is disabled or omitted entirely, then
                          the package will be built only for the target 
                          platform],
       [fat_binary=$enableval], [fat_binary=no])
if test "$fat_binary" != no; then
    AC_MSG_CHECKING([target architectures])

    # Respect TARGET_ARCHS setting from environment if available.
    if test -z "$TARGET_ARCHS"; then
   	# Respect ARCH given to --enable-fat-binary if present.
     if test "$fat_binary" != yes; then
	    TARGET_ARCHS=`echo "$fat_binary" | tr ',' ' '`
     else
	    # Choose a default set of architectures based upon platform.
      TARGET_ARCHS="ppc i386"
     fi
    fi
    AC_MSG_RESULT([$TARGET_ARCHS])

   define([Name],[translit([$1],[./-], [___])])
   # /usr/lib/arch_tool -archify_list $TARGET_ARCHS
   []Name=""
   for archs in $TARGET_ARCHS 
   do
    []Name="$[]Name -arch $archs"
   done

   if test "x$[]Name" != "x"; then
    AC_CHECK_CFLAGS($[]Name,,[]Name="")
   fi

   if test "x$[]Name" != "x"; then
    AC_CHECK_LDFLAGS($[]Name,,[]Name="")
   fi

   undefine([Name])
fi
])# AC_CHECK_FAT