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AC_INIT(Judy, 1.0.0, doug@sourcejudy.com)
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dnl Turn on automake, and pass it the PACKAGE_NAME and PACKAGE_VERSION, too.
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AM_INIT_AUTOMAKE($PACKAGE_NAME, $PACKAGE_VERSION)
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dnl Tell autoconf we want to keep our preprocessor defines in a header named
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dnl config.h. This keeps automake from passing a zillion -D directives to
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AM_CONFIG_HEADER([config.h])
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dnl==========================================================================
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dnl WARNING - WARNING - Shared Library Versioning - WARNING - WARNING
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dnl==========================================================================
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dnl This is the most dangerous part of this file--making a mistake here can
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dnl cause massively painful chaos for libJudy developers, and potentially
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dnl even end users. So PLEASE pay attention, and read up on the theory of
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dnl shared library versioning. Tens of thousands of Linux users (and several
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dnl QA departments) may thank you someday.
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dnl There are two major concerns:
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dnl 1) When changing the libJudy ABI (application binary interface),
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dnl VERSION_INFO *must* be updated according to libtool's rules. Failure
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dnl to do this will make applications using libJudy dump core, typically
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dnl under obscure conditions on user systems. I won't attempt to
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dnl explain these rules here; please see 'info libtool' for details.
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dnl 2) When changing the libJudy ABI, it is also desirable to make libJudy
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dnl "parallel installable". This means that it should be possible to
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dnl install development headers and libraries for more than one version
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dnl of libJudy at once. Failure to do this may cause problems for
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dnl Linux distributions which include libJudy. (For example, it's
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dnl impossible to switch between libpng2-dev and libpng3-dev on a
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dnl Debian system without uninstalling and reinstalling both the Gnome
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dnl and KDE SDKs.) For more information, do a Google search for
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dnl "parallel installable".
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dnl Right now, this package only provides the mechanisms to handle concern
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dnl (1). Concern (2) is slightly more complicated, and will require some
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dnl careful thinking. Fortunately, concern (2) doesn't become important
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dnl until other SDKs rely on the libJudy SDK.
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dnl Of course, it's safe to avoid changing the libJudy ABI. :-)
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dnl The version scheme used by Libtool tracks interfaces, where an interface is
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dnl the set of exported entry points into the library. All Libtool libraries
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dnl start with -version-info set to 0:0:0 - this will be the default version
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dnl number if you don't explicitly set it on the Libtool link command line. The
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dnl meaning of these numbers (from left to right) is as follows:
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dnl The number of the current interface exported by the library. A current
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dnl value of 0, means that you are calling the interface exported by this
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dnl library interface 0.
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dnl The implementation number of the most recent interface exported by this
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dnl library. In this case, a revision value of 0 means that this is the
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dnl first implementation of the interface.
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dnl If the next release of this library exports the same interface, but has
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dnl different implementation (perhaps some bugs have been fixed), the
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dnl revision number will be higher, but current number will be the same. In
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dnl that case, when given a choice, the library with the highest revision
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dnl will always be used by the runtime loader.
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dnl The number of previous additional interfaces supported by this library.
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dnl If age were 2, then this library can be linked into executables which
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dnl were built with a release of this library that exported the current
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dnl interface number, current, or any of the previous two interfaces.
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dnl By definition age must be less than or equal to current. At the outset, only
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dnl the first ever interface is implemented, so age can only be 0.
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VERSION_INFO="-version-info 1:1:0"
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AC_SUBST(VERSION_INFO)
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dnl==========================================================================
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dnl==========================================================================
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dnl Judy can be compiled in one of three flavors: "product" (the default),
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dnl "debug", or "cov". We allow the user to select flavors using
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dnl --enable-debug and --enable-ccover arguments to automake, which is
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dnl the typical way of doing things.
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dnl Note how we perform string comparison:
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dnl if test "x$enable_debug" = xyes; then
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dnl We do several odd things here:
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dnl 1) We use 'test' instead of '[ ]' for shell portability.
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dnl 2) We prefix strings with 'x' when comparing them, to protect against
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dnl 3) We ALWAYS quote user-supplied shell variables, to protect against
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dnl The results of this test aren't used anywhere yet.
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dnl Keep the user entertained.
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AC_MSG_CHECKING(which flavor to build)
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dnl Process our --enable-debug argument.
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AC_HELP_STRING([--enable-debug],
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[enable debugging features]),
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if test "x$enable_debug" != xyes -a "x$enable_debug" != xno; then
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AC_MSG_ERROR(You may not pass an argument to --enable-debug)
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dnl Process our --enable-ccover argument.
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AC_ARG_ENABLE(ccover,
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AC_HELP_STRING([--enable-ccover],
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[enable use of ccover code coverage tools]),
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if test "x$enable_ccover" != xyes -a "x$enable_ccover" != xno; then
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AC_MSG_ERROR(You may not pass an argument to --enable-ccover)
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dnl Determine our flavor.
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if test "x$enable_debug" = xyes -a "x$enable_ccover" = xyes; then
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AC_MSG_ERROR(You may not use --enable-debug and --enable-ccover together)
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elif test "x$enable_debug" = xyes; then
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elif test "x$enable_ccover" = xyes; then
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dnl Define FLAVOR in our makefiles.
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dnl Tell the user what flavor we've decided to build.
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AC_MSG_RESULT($FLAVOR)
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dnl==========================================================================
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dnl Checks for Programs
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dnl==========================================================================
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dnl==========================================================================
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dnl Checks for Header Files
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dnl==========================================================================
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AC_CHECK_HEADERS([fcntl.h inttypes.h limits.h malloc.h stddef.h stdint.h stdlib.h string.h strings.h sys/param.h sys/time.h unistd.h])
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dnl==========================================================================
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dnl Checks for Typedefs, Structures, and Compiler Characteristics
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dnl==========================================================================
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dnl Standard, boring stuff.
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AC_CHECK_TYPES([ptrdiff_t])
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dnl If we're compiling for a little-endian system, define JU_LITTLE_ENDIAN.
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dnl If we can't tell what kind of system we're compling for, alert the
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dnl user as described in 'info autoconf'.
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AC_C_BIGENDIAN(, AC_DEFINE(JU_LITTLE_ENDIAN, 1,
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[Define to 1 on little-endian systems.]))
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AC_ARG_ENABLE(32-bit, [ --enable-32-bit Generate code for a 32-bit environment],
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b32="$enableval", b32="no")
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if test x"$b32" != "xno"; then
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AC_MSG_RESULT(Building 32-bit)
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CFLAGS="-UJU_64BIT $CFLAGS"
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AC_ARG_ENABLE(64-bit, [ --enable-64-bit Generate code for a 64-bit environment],
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b64="$enableval", b64="no")
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if test x"$b64" != "xno"; then
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AC_MSG_RESULT(Building 64-bit)
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CFLAGS="-DJU_64BIT $CFLAGS"
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if test x"$b32" = "xno"; then
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if test x"$b64" = "xno"; then
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AC_MSG_ERROR([You must run configure with either:
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# dnl Determine whether or not we're compiling for a 64-bit system by looking
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# dnl at the size of a 'long'. This will define SIZEOF_LONG in config.h. We
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# dnl append some text to the bottom of config.h to set JU_64BIT appropriately.
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# dnl we try to do the correct thing if the user doesn't chose for us.
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# AC_CHECK_SIZEOF(long)
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# AH_BOTTOM([/* Define JU_64BIT to 1 if we're on a 64-bit system. */
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# if SIZEOF_LONG == 8
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dnl==========================================================================
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dnl Checks for Libraries
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dnl==========================================================================
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AC_FUNC_ERROR_AT_LINE
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AC_CHECK_FUNCS([getpagesize gettimeofday memset munmap pow strchr strcspn strerror strstr strtoul uname])
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dnl These must be called before AM_PROG_LIBTOOL, because it may want
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dnl to call AC_CHECK_PROG.
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AC_CHECK_TOOL(AR, ar)
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AC_CHECK_TOOL(LD, ld)
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AC_CHECK_TOOL(RANLIB, ranlib, :)
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dnl Checks for libtool - this must be done after we set cflags (abi issues)
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build_warnings="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
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AC_ARG_ENABLE([build-warnings],
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[ --enable-build-warnings Enable build-time compiler warnings for gcc])
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if test x"$build_warnings" = xyes; then
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if test x"$GCC" = xyes; then
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WARN_CFLAGS="${build_warnings}"
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AC_SUBST(WARN_CFLAGS)
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AC_CONFIG_FILES([Makefile
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src/JudyCommon/Makefile
added
removed
configure.ac
