acinclude.m4

来自「A*算法 A*算法 A*算法 A*算法A*算法A*算法」· M4 代码 · 共 729 行 · 第 1/2 页

dnl ---------------------------------------------------------------------------
dnl
dnl Macros for configure.in for wxWindows by Robert Roebling, Phil Blecker,
dnl Vadim Zeitlin and Ron Lee
dnl
dnl This script is under the wxWindows licence.
dnl
dnl Version: $Id: acinclude.m4,v 1.32 2005/09/19 20:16:19 MW Exp $
dnl ---------------------------------------------------------------------------


dnl ===========================================================================
dnl Objective-C(++) related macros
dnl ===========================================================================
m4_define([AC_WX_LANG_OBJECTIVEC],
[AC_LANG(C)
ac_ext=m
])

m4_define([AC_WX_LANG_OBJECTIVECPLUSPLUS],
[AC_LANG(C++)
ac_ext=mm
])

dnl ===========================================================================
dnl macros to find the a file in the list of include/lib paths
dnl ===========================================================================

dnl ---------------------------------------------------------------------------
dnl call WX_PATH_FIND_INCLUDES(search path, header name), sets ac_find_includes
dnl to the full name of the file that was found or leaves it empty if not found
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_PATH_FIND_INCLUDES],
[
ac_find_includes=
for ac_dir in $1 /usr/include;
  do
    if test -f "$ac_dir/$2"; then
      ac_find_includes=$ac_dir
      break
    fi
  done
])

dnl ---------------------------------------------------------------------------
dnl call WX_PATH_FIND_LIBRARIES(search path, lib name), sets ac_find_libraries
dnl to the full name of the file that was found or leaves it empty if not found
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_PATH_FIND_LIBRARIES],
[
  ac_find_libraries=
  for ac_dir in $1;
  do
    for ac_extension in a so sl dylib dll.a; do
      if test -f "$ac_dir/lib$2.$ac_extension"; then
        ac_find_libraries=$ac_dir
        break 2
      fi
    done
  done
])

dnl ---------------------------------------------------------------------------
dnl return list of standard library paths
dnl ---------------------------------------------------------------------------
dnl return all default locations:
dnl   - /usr/lib: standard
dnl   - /usr/lib32: n32 ABI on IRIX
dnl   - /usr/lib64: n64 ABI on IRIX
dnl   - /usr/lib/64: 64 bit ABI on Solaris and Linux x86-64
dnl
dnl NB: if any of directories in the list is not a subdir of /usr, code setting
dnl     wx_cv_std_libpath needs to be updated
AC_DEFUN([WX_STD_LIBPATH], [/usr/lib /usr/lib32 /usr/lib/64 /usr/lib64])

dnl ---------------------------------------------------------------------------
dnl Path to include, already defined
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_INCLUDE_PATH_EXIST],
[
  dnl never add -I/usr/include to the CPPFLAGS
  if test "x$1" = "x/usr/include"; then
    ac_path_to_include=""
  else
    echo "$2" | grep "\-I$1" > /dev/null
    result=$?
    if test $result = 0; then
      ac_path_to_include=""
    else
      ac_path_to_include=" -I$1"
    fi
  fi
])

dnl ---------------------------------------------------------------------------
dnl Usage: WX_LINK_PATH_EXIST(path, libpath)
dnl
dnl Set ac_path_to_link to nothing if path is already in libpath of to -Lpath
dnl if it is not, so that libpath can be set to "$libpath$ac_path_to_link"
dnl after calling this function
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_LINK_PATH_EXIST],
[
  dnl never add -L/usr/libXXX explicitely to libpath
  if test "$1" = "default location"; then
    ac_path_to_link=""
  else
    echo "$2" | grep "\-L$1" > /dev/null
    result=$?
    if test $result = 0; then
      ac_path_to_link=""
    else
      ac_path_to_link=" -L$1"
    fi
  fi
])

dnl ===========================================================================
dnl C++ features test
dnl ===========================================================================

dnl ---------------------------------------------------------------------------
dnl WX_CPP_NEW_HEADERS checks whether the compiler has "new" <iostream> header
dnl or only the old <iostream.h> one - it may be generally assumed that if
dnl <iostream> exists, the other "new" headers (without .h) exist too.
dnl
dnl call WX_CPP_NEW_HEADERS(actiof-if-true, action-if-false)
dnl ---------------------------------------------------------------------------

AC_DEFUN([WX_CPP_NEW_HEADERS],
[
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS

    AC_CHECK_HEADERS(iostream)

    if test "$ac_cv_header_iostream" = "yes" ; then
      ifelse([$1], , :, [$1])
    else
      ifelse([$2], , :, [$2])
    fi

    AC_LANG_RESTORE
])

dnl ---------------------------------------------------------------------------
dnl WX_CPP_BOOL checks whether the C++ compiler has a built in bool type
dnl
dnl call WX_CPP_BOOL - will define HAVE_BOOL if the compiler supports bool
dnl ---------------------------------------------------------------------------

AC_DEFUN([WX_CPP_BOOL],
[
  AC_CACHE_CHECK([if C++ compiler supports bool], wx_cv_cpp_bool,
  [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS

    AC_TRY_COMPILE(
      [
      ],
      [
        bool b = true;

        return 0;
      ],
      [
        wx_cv_cpp_bool=yes
      ],
      [
        wx_cv_cpp_bool=no
      ]
    )

    AC_LANG_RESTORE
  ])

  if test "$wx_cv_cpp_bool" = "yes"; then
    AC_DEFINE(HAVE_BOOL)
  fi
])

dnl ---------------------------------------------------------------------------
dnl WX_CPP_EXPLICIT checks whether the C++ compiler support the explicit
dnl keyword and defines HAVE_EXPLICIT if this is the case
dnl ---------------------------------------------------------------------------

AC_DEFUN([WX_CPP_EXPLICIT],
[
  AC_CACHE_CHECK([if C++ compiler supports the explicit keyword],
                 wx_cv_explicit,
  [
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS

    dnl do the test in 2 steps: first check that the compiler knows about the
    dnl explicit keyword at all and then verify that it really honours it
    AC_TRY_COMPILE(
      [
        class Foo { public: explicit Foo(int) {} };
      ],
      [
        return 0;
      ],
      [
        AC_TRY_COMPILE(
            [
                class Foo { public: explicit Foo(int) {} };
                static void TakeFoo(const Foo& foo) { }
            ],
            [
                TakeFoo(17);
                return 0;
            ],
            wx_cv_explicit=no,
            wx_cv_explicit=yes
        )
      ],
      wx_cv_explicit=no
    )

    AC_LANG_RESTORE
  ])

  if test "$wx_cv_explicit" = "yes"; then
    AC_DEFINE(HAVE_EXPLICIT)
  fi
])

dnl ---------------------------------------------------------------------------
dnl a slightly better AC_C_BIGENDIAN macro which allows cross-compiling
dnl ---------------------------------------------------------------------------

AC_DEFUN([WX_C_BIGENDIAN],
[AC_CACHE_CHECK([whether byte ordering is bigendian], ac_cv_c_bigendian,
[ac_cv_c_bigendian=unknown
# See if sys/param.h defines the BYTE_ORDER macro.
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/param.h>], [
#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
 bogus endian macros
#endif], [# It does; now see whether it defined to BIG_ENDIAN or not.
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/param.h>], [
#if BYTE_ORDER != BIG_ENDIAN
 not big endian
#endif], ac_cv_c_bigendian=yes, ac_cv_c_bigendian=no)])
if test $ac_cv_c_bigendian = unknown; then
AC_TRY_RUN([main () {
  /* Are we little or big endian?  From Harbison&Steele.  */
  union
  {
    long l;
    char c[sizeof (long)];
  } u;
  u.l = 1;
  exit (u.c[sizeof (long) - 1] == 1);
}], [ac_cv_c_bigendian=no], [ac_cv_c_bigendian=yes], [ac_cv_c_bigendian=unknown])
fi])
if test $ac_cv_c_bigendian = unknown; then
  AC_MSG_WARN([Assuming little-endian target machine - this may be overriden by adding the line "ac_cv_c_bigendian=${ac_cv_c_bigendian='yes'}" to config.cache file])
fi
if test $ac_cv_c_bigendian = yes; then
  AC_DEFINE(WORDS_BIGENDIAN)
fi
])

dnl ---------------------------------------------------------------------------
dnl override AC_ARG_ENABLE/WITH to cache the results in .cache file
dnl ---------------------------------------------------------------------------

AC_DEFUN([WX_ARG_CACHE_INIT],
        [
          wx_arg_cache_file="configarg.cache"
          echo "loading argument cache $wx_arg_cache_file"
          rm -f ${wx_arg_cache_file}.tmp
          touch ${wx_arg_cache_file}.tmp
          touch ${wx_arg_cache_file}
        ])

AC_DEFUN([WX_ARG_CACHE_FLUSH],
        [
          echo "saving argument cache $wx_arg_cache_file"
          mv ${wx_arg_cache_file}.tmp ${wx_arg_cache_file}
        ])

dnl this macro checks for a three-valued command line --with argument:
dnl   possible arguments are 'yes', 'no', 'sys', or 'builtin'
dnl usage: WX_ARG_SYS_WITH(option, helpmessage, variable-name)
AC_DEFUN([WX_ARG_SYS_WITH],
        [
          AC_MSG_CHECKING([for --with-$1])
          no_cache=0
          AC_ARG_WITH($1, [$2],
                      [
                        if test "$withval" = yes; then
                          ac_cv_use_$1='$3=yes'
                        elif test "$withval" = no; then
                          ac_cv_use_$1='$3=no'
                        elif test "$withval" = sys; then
                          ac_cv_use_$1='$3=sys'
                        elif test "$withval" = builtin; then
                          ac_cv_use_$1='$3=builtin'
                        else
                          AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
                        fi
                      ],
                      [
                        LINE=`grep "$3" ${wx_arg_cache_file}`
                        if test "x$LINE" != x ; then
                          eval "DEFAULT_$LINE"
                        else
                          no_cache=1
                        fi

                        ac_cv_use_$1='$3='$DEFAULT_$3
                      ])

          eval "$ac_cv_use_$1"
          if test "$no_cache" != 1; then
            echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
          fi

          if test "$$3" = yes; then
            AC_MSG_RESULT(yes)
          elif test "$$3" = no; then
            AC_MSG_RESULT(no)
          elif test "$$3" = sys; then
            AC_MSG_RESULT([system version])
          elif test "$$3" = builtin; then
            AC_MSG_RESULT([builtin version])
          else
            AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
          fi
        ])

dnl this macro checks for a command line argument and caches the result
dnl usage: WX_ARG_WITH(option, helpmessage, variable-name)
AC_DEFUN([WX_ARG_WITH],
        [
          AC_MSG_CHECKING([for --with-$1])
          no_cache=0
          AC_ARG_WITH($1, [$2],
                      [
                        if test "$withval" = yes; then
                          ac_cv_use_$1='$3=yes'
                        else
                          ac_cv_use_$1='$3=no'
                        fi
                      ],
                      [
                        LINE=`grep "$3" ${wx_arg_cache_file}`
                        if test "x$LINE" != x ; then
                          eval "DEFAULT_$LINE"
                        else
                          no_cache=1
                        fi

                        ac_cv_use_$1='$3='$DEFAULT_$3
                      ])

          eval "$ac_cv_use_$1"
          if test "$no_cache" != 1; then
            echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
          fi