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wxWidgets/acinclude.m4
Vadim Zeitlin bdc5c6e628 Add --disable-sys-libs configure option. 
This allows to disable the use of all system libraries with a single option
instead of having to use --with-{lib{png,jpeg,tiff},regex,zlib,expat}=builtin
or similar.

This is especially useful under OS X where we want to avoid the dependencies
on any locally installed homebrew or similar libraries.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76948 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2014-07-24 11:34:14 +00:00

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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 ===========================================================================
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 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(lib name, [optional extra search paths])
dnl sets ac_find_libraries to the full name of the file that was found
dnl or leaves it empty if not found
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_PATH_FIND_LIBRARIES],
[
ac_find_libraries=
for ac_dir in $2 $SEARCH_LIB
do
for ac_extension in a so sl dylib dll.a; do
if test -f "$ac_dir/lib$1.$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$1"
fi
fi
])
dnl ---------------------------------------------------------------------------
dnl Usage: WX_LINK_PATH_EXIST(path, libpath)
dnl
dnl Set ac_path_to_link to nothing if path is already in libpath, or to -Lpath
dnl if it is not, so that libpath can be set to "$libpath$ac_path_to_link"
dnl after calling this function
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_LINK_PATH_EXIST],
[
dnl never add -L/usr/libXXX explicitly 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 Usage: WX_FIND_LIB(lib-name, [lib-function to test], [extra search paths])
dnl
dnl Tests in a variety of ways for the presence of lib-name
dnl
dnl On success, returns any novel path found in ac_find_libraries; else "std"
dnl and any cflags in ac_find_cflags
dnl On failure, ac_find_libraries will be empty
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_FIND_LIB],
[
ac_find_libraries=
dnl Try with pkg-config first. It requires its lib-name parameter lowercase
fl_pkgname=`echo "$1" | tr [[:upper:]] [[:lower:]]`
dnl suppress PKG_PROG_PKG_CONFIG output; we don't want to keep seeing it
PKG_PROG_PKG_CONFIG() AS_MESSAGE_FD> /dev/null
PKG_CHECK_MODULES([$1], [$fl_pkgname],
[
dnl Start by assuming there are no novel lib paths
ac_find_libraries="std"
dnl A simple copy of the internal vars $1_CFLAGS $1_LIBS doesn't work
dnl inside the macro
dnl
dnl TODO: When we stop being autoconf 2.61 compatible, the next 2 lines
dnl should become:
dnl AS_VAR_COPY([ac_find_cflags], [$1_CFLAGS])
dnl AS_VAR_COPY([fl_libs], [$1_LIBS])
eval ac_find_cflags=\$$1_CFLAGS
eval fl_libs=\$$1_LIBS
dnl fl_libs may now contain -Lfoopath -lfoo (only non-standard paths are
dnl added) We only want the path bit, not the lib names
for fl_path in $fl_libs
do
if test `echo "$fl_path" | cut -c 1-2` = "-L"; then
dnl there shouldn't be >1 novel path
dnl return it without the -L, ready for WX_LINK_PATH_EXIST
ac_find_libraries=`echo "$fl_path" | cut -c 3-`
fi
done
],
[
if test "x$ac_find_libraries" = "x"; then
dnl Next with AC_CHECK_LIB, if a test function was provided
if test "x$2" != "x"; then
AC_CHECK_LIB([$1], [$2], [ac_find_libraries="std"])
fi
fi
if test "x$ac_find_libraries" = "x"; then
dnl Finally try the search path
dnl Output a message again, as AC_CHECK_LIB will just have said "no"
AC_MSG_CHECKING([elsewhere])
dnl $3 will occasionally hold extra path(s) to search
WX_PATH_FIND_LIBRARIES([$1], [$3])
if test "x$ac_find_libraries" != "x"; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
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(action-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], , :, [$2])
fi
AC_LANG_RESTORE
])
dnl ---------------------------------------------------------------------------
dnl WX_CPP_EXPLICIT checks whether the C++ compiler support the explicit
dnl keyword and defines HAVE_EXPLICIT if this is the case
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_CPP_EXPLICIT],
[
AC_CACHE_CHECK([if C++ compiler supports the explicit keyword],
wx_cv_explicit,
[
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
dnl do the test in 2 steps: first check that the compiler knows about the
dnl explicit keyword at all and then verify that it really honours it
AC_TRY_COMPILE(
[
class Foo { public: explicit Foo(int) {} };
],
[
return 0;
],
[
AC_TRY_COMPILE(
[
class Foo { public: explicit Foo(int) {} };
static void TakeFoo(const Foo& foo) { }
],
[
TakeFoo(17);
return 0;
],
wx_cv_explicit=no,
wx_cv_explicit=yes
)
],
wx_cv_explicit=no
)
AC_LANG_RESTORE
])
if test "$wx_cv_explicit" = "yes"; then
AC_DEFINE(HAVE_EXPLICIT)
fi
])
dnl ---------------------------------------------------------------------------
dnl WX_CHECK_FUNCS(FUNCTIONS...,
dnl [ACTION-IF-FOUND],
dnl [ACTION-IF-NOT-FOUND],
dnl [EXTRA-DEFINES-AND-INCLUDES],
dnl [EXTRA-TEST-CODE])
dnl
dnl Checks that the functions listed in FUNCTIONS exist in the headers and the
dnl libs. For each function, if it is found then defines 'HAVE_FUNCTION' and
dnl executes ACTION-IF-FOUND, otherwise executes ACTION-IF-NOT-FOUND.
dnl
dnl The code from EXTRA-DEFINES-AND-INCLUDES is inserted into the test before
dnl the default headers are included, and EXTRA-TEST-CODE is inserted into
dnl the main() function after the default test for existence.
dnl
dnl Examples:
dnl # the simple case
dnl WX_CHECK_FUNCS(stat)
dnl # use break to finish the loop early
dnl WX_CHECK_FUNCS(mkstemp mktemp, break)
dnl # extra defines
dnl WX_CHECK_FUNCS(strtok_r, [], [], [#define _RREENTRANT])
dnl # extra includes
dnl WX_CHECK_FUNCS(swprintf, [], [], [#include <wchar.h>])
dnl # checking the signature with extra test code
dnl WX_CHECK_FUNCS(gettimeofday, [], [], [#include <sys/time.h>]
dnl [struct timeval tv; struct timezone tz; gettimeofday(&tv, &tz)])
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_CHECK_FUNCS],
[
for wx_func in $1
do
AC_CACHE_CHECK(
[for $wx_func],
[wx_cv_func_$wx_func],
[
AC_LINK_IFELSE(
[
AC_LANG_PROGRAM(
[
$4
AC_INCLUDES_DEFAULT
],
[
#ifndef $wx_func
&$wx_func;
#endif
$5
])
],
[eval wx_cv_func_$wx_func=yes],
[eval wx_cv_func_$wx_func=no])
])
if eval test \$wx_cv_func_$wx_func = yes
then
AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_$wx_func]))
$2
else
:
$3
fi
done
])
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 $ac_cv_c_bigendian = unknown; then
AC_MSG_WARN([Assuming little-endian target machine - this may be overridden by adding the line "ac_cv_c_bigendian=${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 handle options defaults
dnl ---------------------------------------------------------------------------
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)
dnl
dnl the default value (used if the option is not specified at all) is
dnl determined in the following way:
dnl 1. If default value for the given library (DEFAULT_wxUSE_LIBXXX) exists,
dnl it is used: this allows to disable some libraries by default.
dnl 2. If wxUSE_ALL_FEATURES is turned off, the use of the library is turned
dnl off as well: this ensures that minimal builds are really minimal.
dnl 3. If wxUSE_SYS_LIBS is turned off, then "builtin" is used: this allows
dnl to prevent system libraries from being used by using a single option.
dnl 4. Otherwise the default value is "yes", meaning that either the system
dnl (preferred) or builtin version of the library will be used.
AC_DEFUN([WX_ARG_SYS_WITH],
[
AC_MSG_CHECKING([for --with-$1])
AC_ARG_WITH($1, [$2],
[
if test "$withval" = yes; then
AS_TR_SH(wx_cv_use_$1)='$3=yes'
elif test "$withval" = no; then
AS_TR_SH(wx_cv_use_$1)='$3=no'
elif test "$withval" = sys; then
AS_TR_SH(wx_cv_use_$1)='$3=sys'
elif test "$withval" = builtin; then
AS_TR_SH(wx_cv_use_$1)='$3=builtin'
else
AC_MSG_ERROR([Invalid value for --with-$1: should be yes, no, sys, or builtin])
fi
],
[
if test "DEFAULT_$3" = no; then
value=no
elif test "$wxUSE_ALL_FEATURES" = no; then
value=no
elif test "$wxUSE_SYS_LIBS" = no; then
value=builtin
else
value=yes
fi
AS_TR_SH(wx_cv_use_$1)="$3=$value"
])
eval "$AS_TR_SH(wx_cv_use_$1)"
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 simply checks for a command line argument
dnl usage: WX_ARG_WITH(option, helpmessage, variable-name, [withstring])
AC_DEFUN([WX_ARG_WITH],
[
withstring=$4
defaultval=$wxUSE_ALL_FEATURES
if test -z "$defaultval"; then
if test x"$withstring" = xwithout; then
defaultval=yes
else
defaultval=no
fi
fi
AC_MSG_CHECKING([for --${withstring:-with}-$1])
AC_ARG_WITH($1, [$2],
[
if test "$withval" = yes; then
AS_TR_SH(wx_cv_use_$1)='$3=yes'
else
AS_TR_SH(wx_cv_use_$1)='$3=no'
fi
],
[
AS_TR_SH(wx_cv_use_$1)='$3=${'DEFAULT_$3":-$defaultval}"
])
eval "$AS_TR_SH(wx_cv_use_$1)"
if test x"$withstring" = xwithout; then
if test $$3 = yes; then
result=no
else
result=yes
fi
else
result=$$3
fi
AC_MSG_RESULT($result)
])
dnl same as WX_ARG_WITH but makes it clear that the option is enabled by default
AC_DEFUN([WX_ARG_WITHOUT], [WX_ARG_WITH($1, [$2], $3, without)])
dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
dnl usage: WX_ARG_ENABLE(option, helpmessage, var, [enablestring], [default])
dnl
dnl enablestring can be omitted or a literal string "disable" and allows to
dnl show "checking for --disable-foo" message when running configure instead of
dnl the default "checking for --enable-foo" one whih is useful for the options
dnl enabled by default
dnl
dnl the "default" argument can be omitted or contain the default value to use
dnl for the option if it's unspecified
AC_DEFUN([WX_ARG_ENABLE],
[
enablestring=$4
defaultval=$5
if test -z "$defaultval"; then
if test x"$enablestring" = xdisable; then
defaultval=yes
else
defaultval=no
fi
fi
AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
AC_ARG_ENABLE($1, [$2],
[
if test "$enableval" = yes; then
AS_TR_SH(wx_cv_use_$1)='$3=yes'
else
AS_TR_SH(wx_cv_use_$1)='$3=no'
fi
],
[
AS_TR_SH(wx_cv_use_$1)='$3=${'DEFAULT_$3":-$defaultval}"
])
eval "$AS_TR_SH(wx_cv_use_$1)"
if test x"$enablestring" = xdisable; then
if test $$3 = no; then
result=yes
else
result=no
fi
else
result=$$3
fi
AC_MSG_RESULT($result)
])
dnl the same as WX_ARG_ENABLE but makes it more clear that the option is
dnl enabled by default
AC_DEFUN([WX_ARG_DISABLE], [WX_ARG_ENABLE($1, [$2], $3, disable)])
dnl same as WX_ARG_ENABLE but defaults to wxUSE_ALL_FEATURES instead of "yes"
AC_DEFUN([WX_ARG_FEATURE], [WX_ARG_ENABLE($1, [$2], $3,, $wxUSE_ALL_FEATURES)])
dnl Like WX_ARG_ENABLE but accepts a parameter.
dnl
dnl Usage:
dnl WX_ARG_ENABLE_PARAM(option, helpmessage, variable-name, enablestring)
dnl
dnl Example:
dnl WX_ARG_ENABLE_PARAM(foo, [[ --enable-foo[=bar] use foo]], wxUSE_FOO)
dnl
dnl --enable-foo wxUSE_FOO=yes
dnl --disable-foo wxUSE_FOO=no
dnl --enable-foo=bar wxUSE_FOO=bar
dnl <not given> wxUSE_FOO=$DEFAULT_wxUSE_FOO
dnl
AC_DEFUN([WX_ARG_ENABLE_PARAM],
[
enablestring=$4
AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
AC_ARG_ENABLE($1, [$2],
[
wx_cv_use_$1="$3='$enableval'"
],
[
wx_cv_use_$1='$3='$DEFAULT_$3
])
eval "$wx_cv_use_$1"
AC_MSG_RESULT([$$3])
])
dnl ===========================================================================
dnl Linker features test
dnl ===========================================================================
dnl ---------------------------------------------------------------------------
dnl WX_VERSIONED_SYMBOLS checks whether the linker can create versioned
dnl symbols. If it can, sets LDFLAGS_VERSIONING to $CXX flags needed to use
dnl version script file named versionfile
dnl
dnl call WX_VERSIONED_SYMBOLS(versionfile)
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_VERSIONED_SYMBOLS],
[
case "${host}" in
*-*-cygwin* | *-*-mingw* )
dnl although ld does support version script option on these
dnl platforms, it doesn't make much sense to use it under Win32
dnl and, moreover, this breaks linking because of a bug in handling
dnl paths in -Wl,--version-script,path option (if we ever do need
dnl to use it for cygwin/mingw32, keep in mind that replacing last
dnl comma with the equal sign works) so
dnl simply disable it
wx_cv_version_script=no
;;
*)
AC_CACHE_CHECK([if the linker accepts --version-script], wx_cv_version_script,
[
echo "VER_1 { *; };" >conftest.sym
echo "int main() { return 0; }" >conftest.cpp
if AC_TRY_COMMAND([
$CXX -o conftest.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym >/dev/null 2>conftest.stderr]) ; then
if test -s conftest.stderr ; then
wx_cv_version_script=no
else
wx_cv_version_script=yes
fi
else
wx_cv_version_script=no
fi
dnl There's a problem in some old linkers with --version-script that
dnl can cause linking to fail when you have objects with vtables in
dnl libs 3 deep. This is known to happen in netbsd and openbsd with
dnl ld 2.11.2.
dnl
dnl To test for this we need to make some shared libs and
dnl unfortunately we can't be sure of the right way to do that. If the
dnl first two compiles don't succeed then it looks like the test isn't
dnl working and the result is ignored, but if OTOH the first two
dnl succeed but the third does not then the bug has been detected and
dnl the --version-script flag is dropped.
if test $wx_cv_version_script = yes
then
echo "struct B { virtual ~B() { } }; \
struct D : public B { }; \
void F() { D d; }" > conftest.cpp
if AC_TRY_COMMAND([
$CXX -shared -fPIC -o conftest1.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym >/dev/null 2>/dev/null]) &&
AC_TRY_COMMAND([
$CXX -shared -fPIC -o conftest2.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym conftest1.output >/dev/null 2>/dev/null])
then
if AC_TRY_COMMAND([
$CXX -shared -fPIC -o conftest3.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
-Wl,--version-script,conftest.sym conftest2.output conftest1.output >/dev/null 2>/dev/null])
then
wx_cv_version_script=yes
else
wx_cv_version_script=no
fi
fi
fi
rm -f conftest.output conftest.stderr conftest.sym conftest.cpp
rm -f conftest1.output conftest2.output conftest3.output
])
if test $wx_cv_version_script = yes ; then
LDFLAGS_VERSIONING="-Wl,--version-script,$1"
fi
;;
esac
])
dnl ===========================================================================
dnl "3rd party" macros included here because they are not widely available
dnl ===========================================================================
dnl ---------------------------------------------------------------------------
dnl test for availability of iconv()
dnl ---------------------------------------------------------------------------
dnl From Bruno Haible.
AC_DEFUN([AM_ICONV],
[
dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
dnl those with the standalone portable GNU libiconv installed).
AC_ARG_WITH([libiconv-prefix],
[ --with-libiconv-prefix=DIR search for libiconv in DIR/include and DIR/lib], [
for dir in `echo "$withval" | tr : ' '`; do
if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
done
])
AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
am_cv_func_iconv="no, consider installing GNU libiconv"
am_cv_lib_iconv=no
AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
[iconv_t cd = iconv_open("","");
iconv(cd,NULL,NULL,NULL,NULL);
iconv_close(cd);],
am_cv_func_iconv=yes)
if test "$am_cv_func_iconv" != yes; then
am_save_LIBS="$LIBS"
LIBS="$LIBS -liconv"
AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
[iconv_t cd = iconv_open("","");
iconv(cd,NULL,NULL,NULL,NULL);
iconv_close(cd);],
am_cv_lib_iconv=yes
am_cv_func_iconv=yes)
LIBS="$am_save_LIBS"
fi
])
if test "$am_cv_func_iconv" = yes; then
AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
AC_CACHE_CHECK([if iconv needs const], wx_cv_func_iconv_const,
AC_TRY_COMPILE([
#include <stdlib.h>
#include <iconv.h>
extern
#ifdef __cplusplus
"C"
#endif
#if defined(__STDC__) || defined(__cplusplus)
size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
#else
size_t iconv();
#endif
],
[],
wx_cv_func_iconv_const="no",
wx_cv_func_iconv_const="yes"
)
)
iconv_const=
if test "x$wx_cv_func_iconv_const" = "xyes"; then
iconv_const="const"
fi
AC_DEFINE_UNQUOTED(ICONV_CONST, $iconv_const,
[Define as const if the declaration of iconv() needs const.])
fi
LIBICONV=
if test "$am_cv_lib_iconv" = yes; then
LIBICONV="-liconv"
fi
AC_SUBST(LIBICONV)
])
dnl ---------------------------------------------------------------------------
dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x)
dnl ---------------------------------------------------------------------------
dnl WX_SYS_LARGEFILE_TEST
dnl
dnl NB: original autoconf test was checking if compiler supported 6 bit off_t
dnl arithmetic properly but this failed miserably with gcc under Linux
dnl whereas the system still supports 64 bit files, so now simply check
dnl that off_t is big enough
define(WX_SYS_LARGEFILE_TEST,
[typedef struct {
unsigned int field: sizeof(off_t) == 8;
} wxlf;
])
dnl WX_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR)
define(WX_SYS_LARGEFILE_MACRO_VALUE,
[
AC_CACHE_CHECK([for $1 value needed for large files], [$3],
[
AC_TRY_COMPILE([#define $1 $2
#include <sys/types.h>],
WX_SYS_LARGEFILE_TEST,
[$3=$2],
[$3=no])
]
)
if test "$$3" != no; then
wx_largefile=yes
AC_DEFINE_UNQUOTED([$1], [$$3])
fi
])
dnl AC_SYS_LARGEFILE
dnl ----------------
dnl By default, many hosts won't let programs access large files;
dnl one must use special compiler options to get large-file access to work.
dnl For more details about this brain damage please see:
dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
AC_DEFUN([AC_SYS_LARGEFILE],
[AC_ARG_ENABLE(largefile,
[ --disable-largefile omit support for large files])
if test "$enable_largefile" != no; then
dnl _FILE_OFFSET_BITS==64 is needed for Linux, Solaris, ...
dnl _LARGE_FILES -- for AIX
wx_largefile=no
WX_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits)
if test "x$wx_largefile" != "xyes"; then
WX_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files)
fi
AC_MSG_CHECKING(if large file support is available)
if test "x$wx_largefile" = "xyes"; then
AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
fi
AC_MSG_RESULT($wx_largefile)
fi
])
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