acinclude.m4

Motion JPEG编解码器源代码

      [m4_define([_AC_PATH_LIB_DEFVERSION_MICRO],
                 [MICRO])
      ])
ifdef([_AC_PATH_LIB_DEFVERSION_SUFFIX],,
      [m4_define([_AC_PATH_LIB_DEFVERSION_SUFFIX],
                 [_VERSION])
      ])
])# _AC_PATH_LIB_DEFAULTS


# _AC_PATH_LIB_OPTIONS
# --------------------
# configure options.
AC_DEFUN([_AC_PATH_LIB_OPTIONS],
[m4_if(AC_PATH_LIB_USEPKGCONFIG, [true], ,
[AC_ARG_WITH(DOWN-prefix,
            AC_HELP_STRING([--with-DOWN-prefix=PFX],
                           [prefix where UP is installed (optional)]),
            [LDOWN[]_config_prefix="$withval"],
            [LDOWN[]_config_prefix=""])dnl
AC_ARG_WITH(DOWN-exec-prefix,
            AC_HELP_STRING([--with-DOWN-exec-prefix=PFX],
                           [exec-prefix where UP is installed (optional)]),
            [LDOWN[]_config_exec_prefix="$withval"],
            [LDOWN[]_config_exec_prefix=""])dnl
])
AC_ARG_ENABLE(DOWN[]test,
              AC_HELP_STRING([--disable-DOWN[]test],
                             [do not try to compile and run a test UP program]),
              [LDOWN[]_test_enabled="no"],
              [LDOWN[]_test_enabled="yes"])dnl
])# _AC_PATH_LIB_OPTIONS


# _AC_PATH_LIB_CHECK(LIBRARY, MINIMUM-VERSION, MODULES)
# -----------------------------------------------------
# Obtain library CFLAGS, LIBS and VERSION information.  Cache results,
# but set avoidcache to no if config program is not available.  Break
# up available and minumum version into major, minor and micro version
# numbers.
AC_DEFUN([_AC_PATH_LIB_CHECK],
[
# Set up LIBRARY-config script parameters
m4_if([$3], , ,
      [LDOWN[]_config_args="$LDOWN[]_config_args $3"])
LDOWN[]_min_version=`echo "$2" | sed -e 's/ -nocheck//'`
m4_if([$2], , ,[if test "$LDOWN[]_min_version" = "$2" ; then
                  LDOWN[]_version_test_enabled="yes"
                fi])
m4_if(AC_PATH_LIB_USEPKGCONFIG, [true],
[LDOWN[]_config_args="$1 $LDOWN[]_config_args"
],
[  if test x$LDOWN[]_config_exec_prefix != x ; then
    LDOWN[]_config_args="$LDOWN[]_config_args --exec-prefix=$LDOWN[]_config_exec_prefix"
  fi
  if test x$LDOWN[]_config_prefix != x ; then
    LDOWN[]_config_args="$LDOWN[]_config_args --prefix=$LDOWN[]_config_prefix"
  fi
])
dnl set --version for libconfig or --modversion for pkgconfig
m4_if(AC_PATH_LIB_USEPKGCONFIG, [true],
      [AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
       if test x$PKG_CONFIG != xno ; then
         if pkg-config --atleast-pkgconfig-version 0.7 ; then
           :
         else
           AC_PATH_LIB_ERROR([A new enough version of pkg-config was not found:])
           AC_PATH_LIB_ERROR([version 0.7 or better required.])
           AC_PATH_LIB_ERROR([See http://pkgconfig.sourceforge.net])
           PKG_CONFIG=no
         fi
       fi
       UP[]_CONFIG="$PKG_CONFIG"
       LDOWN[]_config="pkg-config"
       m4_pushdef([LIBCONFIG_CFLAGS], [--cflags])
       m4_pushdef([LIBCONFIG_LIBS], [--libs])
       m4_pushdef([LIBCONFIG_VERSION], [--modversion])
      ],
      [AC_PATH_PROG(UP[]_CONFIG, $LDOWN[]_config, no)
       m4_pushdef([LIBCONFIG_CFLAGS], [--cflags])
       m4_pushdef([LIBCONFIG_LIBS], [--libs])
       m4_pushdef([LIBCONFIG_VERSION], [--version])
       if test x$UP[]_CONFIG = xno ; then
         AC_PATH_LIB_ERROR([The $LDOWN[]_config script installed by UP could not be found.])
         AC_PATH_LIB_ERROR([If UP was installed in PREFIX, make sure PREFIX/bin is in])
         AC_PATH_LIB_ERROR([your path, or set the UP[]_CONFIG environment variable to the])
         AC_PATH_LIB_ERROR([full path to $LDOWN[]_config.])
       fi
      ])

if test x$UP[]_CONFIG = xno ; then
  LDOWN[]_present_avoidcache="no"
else
  LDOWN[]_present_avoidcache="yes"

  AC_CACHE_CHECK([for UP CFLAGS],
                 [CACHE[]_cflags],
                 [CACHE[]_cflags=`$UP[]_CONFIG $LDOWN[]_config_args LIBCONFIG_CFLAGS`])
  AC_CACHE_CHECK([for UP LIBS],
                 [CACHE[]_libs],
                 [CACHE[]_libs=`$UP[]_CONFIG $LDOWN[]_config_args LIBCONFIG_LIBS`])
  AC_CACHE_CHECK([for UP VERSION],
                 [CACHE[]_version],
                 [CACHE[]_version=`$UP[]_CONFIG $LDOWN[]_config_args LIBCONFIG_VERSION`])
  UP[]_CFLAGS="$CACHE[]_cflags"
  UP[]_LIBS="$CACHE[]_libs"
  UP[]_VERSION="$CACHE[]_version"
  LDOWN[]_config_major_version=`echo "$CACHE[]_version" | \
      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
  LDOWN[]_config_minor_version=`echo "$CACHE[]_version" | \
      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
  LDOWN[]_config_micro_version=`echo "$CACHE[]_version" | \
      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
  LDOWN[]_min_major_version=`echo "$LDOWN[]_min_version" | \
      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
  LDOWN[]_min_minor_version=`echo "$LDOWN[]_min_version" | \
      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
  LDOWN[]_min_micro_version=`echo "$LDOWN[]_min_version" | \
      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
fi
m4_popdef([LIBCONFIG_CFLAGS])dnl
m4_popdef([LIBCONFIG_LIBS])dnl
m4_popdef([LIBCONFIG_VERSION])dnl
])# _AC_PATH_LIB_CHECK


# _AC_PATH_LIB_FINI(ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
# -------------------------------------------------------
# Finish: report errors and define/substitute variables.  Run any
# user-supplied code for success or failure.  Restore defaults.
AC_DEFUN([_AC_PATH_LIB_FINI],
[dnl define variables and run extra code
UP[]_CFLAGS="$CACHE[]_cflags"
UP[]_LIBS="$CACHE[]_libs"
UP[]_VERSION="$CACHE[]_version"
AC_SUBST(UP[]_CFLAGS)dnl
AC_SUBST(UP[]_LIBS)dnl
AC_SUBST(UP[]_VERSION)dnl
# Run code which depends upon the test result.
if test x$CACHE[]_present = xyes ; then
  m4_if([$1], , :, [$1])
else
# Restore saved variables if test fails
  UP[]_CFLAGS="$ac_save_[]UP[]_CFLAGS"
  UP[]_LIBS="$ac_save_[]UP[]_LIBS"
  UP[]_VERSION="$ac_save_[]UP[]_VERSION"
  m4_if([$2], , :, [$2])
fi
dnl Restore defaults
AC_PATH_LIB_CHECK_REGISTER_DEFAULTS
AC_PATH_LIB_PKGCONFIG
])# _AC_PATH_LIB_FINI




## -------------------- ##
## 3. Integrity checks. ##
## -------------------- ##


# _AC_PATH_LIB_CHECK_TESTS(MINIMUM-VERSION)
# -----------------------------------------
# Now check if the installed UP is sufficiently new. (Also sanity
# checks the results of DOWN-config to some extent
AC_DEFUN([_AC_PATH_LIB_CHECK_TESTS],
[AC_CACHE_CHECK([for UP - m4_if([$1], ,
                               [any version],
                               [version >= $LDOWN[]_min_version])],
               [CACHE[]_present],
[CACHE[]_present="$LDOWN[]_present_avoidcache"
if test x$CACHE[]_present = xyes -a x$LDOWN[]_test_enabled = xyes -a \
    x$LDOWN[]_version_test_enabled = xyes ; then
  m4_default([_AC_PATH_LIB_CHECK_TEST_COMPILE],
             [_AC_PATH_LIB_CHECK_TEST_COMPILE],
             [_AC_PATH_LIB_CHECK_TEST_COMPILE_DEFAULT])
else
  m4_default([_AC_PATH_LIB_CHECK_VERSION],
             [_AC_PATH_LIB_CHECK_VERSION],
             [_AC_PATH_LIB_CHECK_VERSION_DEFAULT])
# If the user allowed it, try linking with the library
  if test x$LDOWN[]_test_enabled = xyes ; then
    _AC_PATH_LIB_CHECK_LINK(, [
      CACHE[]_present="no"
      if test x$LDOWN[]_version_test_error = xyes ; then
        AC_PATH_LIB_ERROR
      fi
      AC_PATH_LIB_ERROR([The test program failed to compile or link.  See the file])
      AC_PATH_LIB_ERROR([config.log for the exact error that occured.  This usually])
      AC_PATH_LIB_ERROR([means UP was not installed, was incorrectly installed])
      AC_PATH_LIB_ERROR([or that you have moved UP since it was installed.  In])
      AC_PATH_LIB_ERROR([the latter case, you may want to edit the $LDOWN[]_config])
      AC_PATH_LIB_ERROR([script: $UP[]_CONFIG])
    ])
  fi
fi])
dnl end tests
])# _AC_PATH_LIB_CHECK_TESTS


# _AC_PATH_LIB_CHECK_TEST_COMPILE_DEFAULT
# ---------------------------------------
# Check if the installed UP is sufficiently new. (Also sanity checks
# the results of DOWN-config to some extent.  The test program must
# compile, link and run sucessfully
AC_DEFUN([_AC_PATH_LIB_CHECK_TEST_COMPILE],
[m4_pushdef([RUNLOG], run.[]DOWN[]test)dnl
m4_pushdef([MAJOR], _AC_PATH_LIB_VERSION_PREFIX[]_AC_PATH_LIB_VERSION_MAJOR[]_AC_PATH_LIB_VERSION_SUFFIX)dnl
m4_pushdef([MINOR], _AC_PATH_LIB_VERSION_PREFIX[]_AC_PATH_LIB_VERSION_MINOR[]_AC_PATH_LIB_VERSION_SUFFIX)dnl
m4_pushdef([MICRO], _AC_PATH_LIB_VERSION_PREFIX[]_AC_PATH_LIB_VERSION_MICRO[]_AC_PATH_LIB_VERSION_SUFFIX)dnl
m4_pushdef([DEFMAJOR], _AC_PATH_LIB_DEFVERSION_PREFIX[]_AC_PATH_LIB_DEFVERSION_MAJOR[]_AC_PATH_LIB_DEFVERSION_SUFFIX)dnl
m4_pushdef([DEFMINOR], _AC_PATH_LIB_DEFVERSION_PREFIX[]_AC_PATH_LIB_DEFVERSION_MINOR[]_AC_PATH_LIB_DEFVERSION_SUFFIX)dnl
m4_pushdef([DEFMICRO], _AC_PATH_LIB_DEFVERSION_PREFIX[]_AC_PATH_LIB_DEFVERSION_MICRO[]_AC_PATH_LIB_DEFVERSION_SUFFIX)dnl
  ac_save_CFLAGS="$CFLAGS"
  ac_save_LIBS="$LIBS"
  CFLAGS="$CFLAGS $UP[]_CFLAGS"
  LIBS="$UP[]_LIBS $LIBS"
  rm -f RUNLOG
  AC_TRY_RUN([
#include <$]LDOWN[_header>
#include <stdio.h>
#include <stdlib.h>

/*
 * XXX FIXME Francesco:
 *   This is a pigsty patch for undefined strdup (defined in string.h).
 *   Maybe we should look for strdup() or wrapping it using functions
 *   like malloc && strcpy().
 */
#include <string.h>

int
main ()
{
  int major, minor, micro;
  char *tmp_version;
  FILE *errorlog;

  if ((errorlog = fopen("]ERRORLOG[", "w")) == NULL) {
     exit(1);
   }

  system ("touch ]RUNLOG[");

  /* HP/UX 9 (%@#!) writes to sscanf strings */
  tmp_version = strdup("$]LDOWN[_min_version");
  if (!tmp_version) {
     exit(1);
   }
  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
     fprintf(errorlog, "*** %s: bad version string\n", "$]LDOWN[_min_version");
     exit(1);
   }

  if ((]MAJOR[ != $]LDOWN[_config_major_version) ||
      (]MINOR[ != $]LDOWN[_config_minor_version) ||
      (]MICRO[ != $]LDOWN[_config_micro_version))
    {
      fprintf(errorlog, "*** '$]UP[_CONFIG ]LIBCONFIG_VERSION[' returned %d.%d.%d, but \n", \
        $]LDOWN[_config_major_version, $]LDOWN[_config_minor_version, \
        $]LDOWN[_config_micro_version);
      fprintf(errorlog, "*** ]UP[ (%d.%d.%d) was found!\n", \
        ]MAJOR[, ]MINOR[, ]MICRO[);
      fprintf(errorlog, "***\n");
      fprintf(errorlog, "*** If $]LDOWN[_config was correct, then it is best to remove\n");
      fprintf(errorlog, "*** the old version of ]UP[.  You may also be able to\n");
      fprintf(errorlog, "*** fix the error by modifying your LD_LIBRARY_PATH enviroment\n");
      fprintf(errorlog, "*** variable, or by editing /etc/ld.so.conf.  Make sure you have\n");
      fprintf(errorlog, "*** run ldconfig if that is required on your system.\n");
      fprintf(errorlog, "*** If $]LDOWN[_config was wrong, set the environment\n");
      fprintf(errorlog, "*** variable ]UP[_CONFIG to point to the correct copy of\n");
      fprintf(errorlog, "*** $]LDOWN[_config, and remove the file config.cache\n");
      fprintf(errorlog, "*** before re-running configure.\n");
    }
#if defined (]DEFMAJOR[) && defined (]DEFMINOR[) && defined (]DEFMICRO[)
  else if ((]MAJOR[ != ]DEFMAJOR[) ||
           (]MINOR[ != ]DEFMINOR[) ||
           (]MICRO[ != ]DEFMICRO[))
    {
      fprintf(errorlog, "*** ]UP[ header files (version %d.%d.%d) do not match\n",
             ]DEFMAJOR[, ]DEFMINOR[, ]DEFMICRO[);
      fprintf(errorlog, "*** library (version %d.%d.%d)\n",
             ]MAJOR[, ]MINOR[, ]MICRO[);
    }
#endif /* defined (]DEFMAJOR[) ... */
  else
    {
      if ((]MAJOR[ > major) ||
        ((]MAJOR[ == major) && (]MINOR[  > minor)) ||
        ((]MAJOR[ == major) && (]MINOR[ == minor) && (]MICRO[ >= micro)))
      {
        return 0;
       }
     else
      {
        fprintf(errorlog, "*** An old version of ]UP[ (%d.%d.%d) was found.\n",
               ]MAJOR[, ]MINOR[, ]MICRO[);
        fprintf(errorlog, "*** You need a version of ]UP[ newer than %d.%d.%d.\n",
               major, minor, micro);
        /*fprintf(errorlog, "*** The latest version of ]UP[ is always available from ftp://ftp.my.site\n");*/
        fprintf(errorlog, "***\n");
        fprintf(errorlog, "*** If you have already installed a sufficiently new version, this\n");
        fprintf(errorlog, "*** error probably means that the wrong copy of the $]LDOWN[_config\n");
        fprintf(errorlog, "*** shell script is being found.  The easiest way to fix this is to\n");
        fprintf(errorlog, "*** remove the old version of ]UP[, but you can also set the\n");
        fprintf(errorlog, "*** ]UP[_CONFIG environment variable to point to the correct\n");
        fprintf(errorlog, "*** copy of $]LDOWN[_config.  (In this case, you will have to\n");
        fprintf(errorlog, "*** modify your LD_LIBRARY_PATH environment variable, or edit\n");
        fprintf(errorlog, "*** /etc/ld.so.conf so that the correct libraries are found at\n");
        fprintf(errorlog, "*** run-time.)\n");
      }
    }
  return 1;
}
],, [CACHE[]_present="no"],
    [AC_PATH_LIB_ERROR([cross compiling; assumed OK.])])
  CFLAGS="$ac_save_CFLAGS"
  LIBS="$ac_save_LIBS"

if test -f RUNLOG ; then
  :
elif test x$LDOWN[]_version_test_enabled = xyes ; then
  AC_PATH_LIB_ERROR([Could not run UP test program, checking why...])
  AC_PATH_LIB_ERROR
  _AC_PATH_LIB_CHECK_LINK(dnl
    [AC_PATH_LIB_ERROR([The test program compiled, but did not run.  This usually])
     AC_PATH_LIB_ERROR([means that the run-time linker is not finding UP or])
     AC_PATH_LIB_ERROR([finding the wrong version of UP.  If it is not finding])
     AC_PATH_LIB_ERROR([UP, you will need to set your LD_LIBRARY_PATH environment])
     AC_PATH_LIB_ERROR([variable, or edit /etc/ld.so.conf to point to the installed])
     AC_PATH_LIB_ERROR([location.  Also, make sure you have run ldconfig if that is])
     AC_PATH_LIB_ERROR([required on your system.])