]> git.saurik.com Git - wxWidgets.git/blobdiff - configure.in
wxSVGDC class include files
[wxWidgets.git] / configure.in
index 96afe7dc6146629b1498991b5318bdf30b2603e9..9a68484a475eae35380d24193118c2652be0f984 100644 (file)
@@ -96,9 +96,6 @@ dnl _REENTRANT" and it's easier to just define this symbol for these platforms
 dnl than checking it during run-time
 NEEDS_D_REENTRANT_FOR_R_FUNCS=0
 
-dnl the additional define needed for MT programs
-CPP_MT_FLAG=-D_REENTRANT
-
 dnl the list of all available toolkits
 dnl
 dnl update NUM_TOOLKITS calculation below when adding a new toolkit here!
@@ -183,7 +180,6 @@ case "${host}" in
   *-*-freebsd*)
     USE_BSD=1
     USE_FREEBSD=1
-    CPP_MT_FLAG=-D_THREAD_SAFE
     AC_DEFINE(__FREEBSD__)
     AC_DEFINE(__BSD__)
     DEFAULT_DEFAULT_wxUSE_GTK=1
@@ -268,7 +264,6 @@ case "${host}" in
     dnl PowerPC Darwin based distributions (including Mac OS X)
     USE_BSD=1
     USE_DARWIN=1
-    CPP_MT_FLAG=
     SO_SUFFIX=dylib
     AC_DEFINE(__BSD__)
     AC_DEFINE(__DARWIN__)
@@ -291,28 +286,6 @@ if test "$USE_UNIX" = 1 ; then
     AC_DEFINE(__UNIX__)
 fi
 
-dnl check for glibc version
-if test "$USE_LINUX" = 1; then
-    AC_CACHE_CHECK([for glibc 2.1 or later], wx_lib_glibc21,[
-        AC_TRY_COMPILE([#include <features.h>],
-            [
-                #if !__GLIBC_PREREQ(2, 1)
-                    #error not glibc2.1
-                #endif
-            ],
-            [
-                wx_lib_glibc21=yes
-            ],
-            [
-                wx_lib_glibc21=no
-            ]
-        )
-    ])
-    if test "$wx_lib_glibc21" = "yes"; then
-        AC_DEFINE(wxHAVE_GLIBC2)
-    fi
-fi
-
 dnl ---------------------------------------------------------------------------
 dnl command line options for configure
 dnl ---------------------------------------------------------------------------
@@ -340,8 +313,8 @@ if test $DEBUG_CONFIGURE = 1; then
   DEFAULT_wxUSE_OPTIMISE=no
   DEFAULT_wxUSE_PROFILE=no
   DEFAULT_wxUSE_NO_DEPS=no
-  DEFAULT_wxUSE_NO_RTTI=yes
-  DEFAULT_wxUSE_NO_EXCEPTIONS=yes
+  DEFAULT_wxUSE_NO_RTTI=no
+  DEFAULT_wxUSE_NO_EXCEPTIONS=no
   DEFAULT_wxUSE_PERMISSIVE=no
   DEFAULT_wxUSE_DEBUG_FLAG=yes
   DEFAULT_wxUSE_DEBUG_INFO=yes
@@ -514,8 +487,8 @@ else
   DEFAULT_wxUSE_OPTIMISE=yes
   DEFAULT_wxUSE_PROFILE=no
   DEFAULT_wxUSE_NO_DEPS=no
-  DEFAULT_wxUSE_NO_RTTI=yes
-  DEFAULT_wxUSE_NO_EXCEPTIONS=yes
+  DEFAULT_wxUSE_NO_RTTI=no
+  DEFAULT_wxUSE_NO_EXCEPTIONS=no
   DEFAULT_wxUSE_PERMISSIVE=no
   DEFAULT_wxUSE_DEBUG_FLAG=no
   DEFAULT_wxUSE_DEBUG_INFO=no
@@ -713,14 +686,14 @@ AC_ARG_WITH(gtk,           [  --with-gtk              use GTK+], [wxUSE_GTK="$wi
 AC_ARG_WITH(motif,         [  --with-motif            use Motif/Lesstif], [wxUSE_MOTIF="$withval" CACHE_MOTIF=1 TOOLKIT_GIVEN=1])
 AC_ARG_WITH(mac,           [  --with-mac              use Mac OS X], [wxUSE_MAC="$withval" TOOLKIT_GIVEN=1])
 AC_ARG_WITH(wine,          [  --with-wine             use WINE], [wxUSE_WINE="$withval" CACHE_WINE=1 TOOLKIT_GIVEN=1])
-AC_ARG_WITH(msw,           [  --with-msw              use MS-Windows], [wxUSE_MSW="$withval" CACHE_MSW TOOLKIT_GIVEN=1])
+AC_ARG_WITH(msw,           [  --with-msw              use MS-Windows], [wxUSE_MSW="$withval" CACHE_MSW=1 TOOLKIT_GIVEN=1])
 AC_ARG_WITH(pm,            [  --with-pm               use OS/2 Presentation Manager], [wxUSE_PM="$withval" CACHE_PM=1 TOOLKIT_GIVEN=1])
 AC_ARG_WITH(mgl,           [  --with-mgl              use SciTech MGL], [wxUSE_MGL="$withval" CACHE_MGL=1 TOOLKIT_GIVEN=1])
 AC_ARG_WITH(microwin,      [  --with-microwin         use MicroWindows], [wxUSE_MICROWIN="$withval" CACHE_MICROWIN=1 TOOLKIT_GIVEN=1])
 AC_ARG_WITH(x11,           [  --with-x11              use X11], [wxUSE_X11="$withval" wxUSE_UNIVERSAL="yes" CACHE_X11=1 TOOLKIT_GIVEN=1])
 WX_ARG_ENABLE(nanox,       [  --enable-nanox          use NanoX], wxUSE_NANOX)
 
-AC_ARG_ENABLE(gtk2,        [  --enable-gtk2           use GTK+ 2.0 if available (EXPERIMENTAL)],wxUSE_GTK2=1,wxUSE_GTK2=0)
+AC_ARG_ENABLE(gtk2,        [  --enable-gtk2           use GTK+ 2.0 if available (EXPERIMENTAL)],wxUSE_GTK2="yes",wxUSE_GTK2="no")
 
 WX_ARG_SYS_WITH(libpng,    [  --with-libpng           use libpng (PNG image format)], wxUSE_LIBPNG)
 WX_ARG_SYS_WITH(libjpeg,   [  --with-libjpeg          use libjpeg (JPEG file format)], wxUSE_LIBJPEG)
@@ -1155,7 +1128,7 @@ AC_CACHE_SAVE
 dnl cross-compiling support: we're cross compiling if the build system is
 dnl different from the target one (assume host and target be always the same)
 if test "$build" != "$host" ; then
-    if test "$USE_WIN32" = 1 -o "$USE_DOS" = 1 ; then
+    if test "$USE_WIN32" = 1 -o "$USE_DOS" = 1 -o "$USE_UNIX"; then
         CC=$host_alias-gcc
         CXX=$host_alias-c++
         AR=$host_alias-ar
@@ -1175,10 +1148,13 @@ dnl   defines CC with the compiler to use
 dnl   defines GCC with yes if using gcc
 dnl   defines GCC empty if not using gcc
 dnl   defines CFLAGS
+dnl
+dnl this magic incantation is needed to prevent AC_PROG_CC from setting the
+dnl default CFLAGS (something like "-g -O2") - we don't need this as add
+dnl -g and -O flags ourselves below
+CFLAGS=${CFLAGS:=}
 AC_PROG_CC
 
-CFLAGS=`echo "$CFLAGS" | sed 's/-g//g'`
-
 dnl is -traditional needed for correct compilations
 dnl   adds -traditional for gcc if needed
 AC_PROG_GCC_TRADITIONAL
@@ -1191,10 +1167,11 @@ dnl   defines CXX with the compiler to use
 dnl   defines GXX with yes if using gxx
 dnl   defines GXX empty if not using gxx
 dnl   defines CXXFLAGS
+dnl
+dnl see CFLAGS line above
+CXXFLAGS=${CXXFLAGS:=}
 AC_PROG_CXX
 
-CXXFLAGS=`echo "$CXXFLAGS" | sed 's/-g//g'`
-
 AC_LANG_RESTORE
 
 dnl ranlib command
@@ -1297,6 +1274,78 @@ AC_PROG_LEX
 dnl needed for making link to setup.h
 AC_PROG_LN_S
 
+dnl ---------------------------------------------------------------------------
+dnl Checks for compiler characteristics
+dnl ---------------------------------------------------------------------------
+
+dnl defines const to be empty if c-compiler does not support const fully
+AC_C_CONST
+dnl defines inline to a sensible value for the c-compiler
+AC_C_INLINE
+
+dnl check the sizes of integral types (give some reasonable default values for
+dnl cross-compiling)
+dnl   defines the size of certain types of variables in SIZEOF_<TYPE>
+AC_CHECK_SIZEOF(char, 1)
+AC_CHECK_SIZEOF(short, 2)
+AC_CHECK_SIZEOF(void *, 4)
+AC_CHECK_SIZEOF(int, 4)
+AC_CHECK_SIZEOF(long, 4)
+
+case "${host}" in
+    arm-*-linux* )
+        AC_CHECK_SIZEOF(long long, 8)
+    ;;
+    * )
+        AC_CHECK_SIZEOF(long long, 0)
+esac
+
+
+dnl we have to do it ourselves because SGI/Irix's stdio.h does not include
+dnl wchar_t and AC_CHECK_SIZEOF only includes stdio.h
+dnl Mac OS X does not provide wchar.h and wchar_t is defined by stdlib.h (GD)
+AC_CACHE_CHECK([size of wchar_t], wx_cv_sizeof_wchar_t,
+[
+    AC_TRY_RUN(
+        [
+            #ifdef HAVE_WCHAR_H
+            #  ifdef __CYGWIN__
+            #    include <stddef.h>
+            #  endif
+            #  include <wchar.h>
+            #endif
+            #ifdef HAVE_STDLIB_H
+            #  include <stdlib.h>
+            #endif
+            #include <stdio.h>
+            int main()
+            {
+                FILE *f=fopen("conftestval", "w");
+                if (!f) exit(1);
+                fprintf(f, "%i", sizeof(wchar_t));
+                exit(0);
+            }
+        ],
+        wx_cv_sizeof_wchar_t=`cat conftestval`,
+        wx_cv_sizeof_wchar_t=0,
+        wx_cv_sizeof_wchar_t=4
+    )
+])
+
+AC_DEFINE_UNQUOTED(SIZEOF_WCHAR_T, $wx_cv_sizeof_wchar_t)
+
+dnl check for large file support
+AC_SYS_LARGEFILE
+
+dnl check for bytesex stuff (don't use AC_C_BIGENDIAN to allow cross-compiling)
+WX_C_BIGENDIAN
+
+dnl check for iostream (as opposed to iostream.h) standard header
+WX_CPP_NEW_HEADERS(, AC_DEFINE(wxUSE_IOSTREAMH))
+
+dnl check whether C++ compiler supports bool built-in type
+WX_CPP_BOOL
+
 dnl ---------------------------------------------------------------------------
 dnl Define search path for includes and libraries: all headers and libs will be
 dnl looked for in all directories of this path
@@ -1385,6 +1434,31 @@ dnl ------------------------------------------------------------------------
 dnl flush the cache because checking for libraries below might abort
 AC_CACHE_SAVE
 
+dnl check for glibc version
+dnl
+dnl VZ: I have no idea why had this check been there originally, but now
+dnl     it is only used to get the recursive mutexes under Linux
+if test "$USE_LINUX" = 1; then
+    AC_CACHE_CHECK([for glibc 2.1 or later], wx_cv_lib_glibc21,[
+        AC_TRY_COMPILE([#include <features.h>],
+            [
+                #if (__GLIBC__ < 2) || (__GLIBC_MINOR__ < 1)
+                    #error not glibc2.1
+                #endif
+            ],
+            [
+                wx_cv_lib_glibc21=yes
+            ],
+            [
+                wx_cv_lib_glibc21=no
+            ]
+        )
+    ])
+    if test "$wx_cv_lib_glibc21" = "yes"; then
+        AC_DEFINE(wxHAVE_GLIBC2)
+    fi
+fi
+
 dnl ---------------------------------------------------------------------------
 dnl Optional libraries
 dnl
@@ -1717,7 +1791,7 @@ if test "$wxUSE_GUI" = "yes"; then
 
                 wx_cv_lib_gtk=
                 if test "x$wxUSE_GTK2" = "xyes"; then
-                    AM_PATH_GTK_2_0(1.3.1, wx_cv_lib_gtk=2.0, , $GTK_MODULES)
+                    AM_PATH_GTK_2_0(2.0.0, wx_cv_lib_gtk=2.0, , $GTK_MODULES)
                 fi
 
                 if test -z "$wx_cv_lib_gtk"; then
@@ -2063,6 +2137,8 @@ equivalent variable and GTK+ is version 1.2.3 or above.
     if test "$wxUSE_MAC" = 1; then
         if test "$wxUSE_PRECOMP" = "yes"; then
             CPPFLAGS="$CPPFLAGS -cpp-precomp"
+        else
+            CPPFLAGS="$CPPFLAGS -no-cpp-precomp"
         fi
         CPPFLAGS="$CPPFLAGS -I/Developer/Headers/FlatCarbon -I\${top_srcdir}/src/mac/morefile"
         CFLAGS="$CFLAGS -fpascal-strings"
@@ -2099,7 +2175,11 @@ equivalent variable and GTK+ is version 1.2.3 or above.
         ALL_HEADERS="\$(ALL_HEADERS) \${UNIV_HEADERS}"
 
         PORT_FILES="${PORT_FILES} \${top_srcdir}/src/univ/files.lst"
-        TOOLKIT_VPATH="\${top_srcdir}/src/univ${PATH_IFS}\${top_srcdir}/src/univ/themes${PATH_IFS}\${top_srcdir}/src/${TOOLKIT_DIR}"
+        if test "$wxUSE_X11" = 1; then
+            TOOLKIT_VPATH="\${top_srcdir}/src/${TOOLKIT_DIR}${PATH_IFS}\${top_srcdir}/src/univ${PATH_IFS}\${top_srcdir}/src/univ/themes"
+        else
+            TOOLKIT_VPATH="\${top_srcdir}/src/univ${PATH_IFS}\${top_srcdir}/src/univ/themes${PATH_IFS}\${top_srcdir}/src/${TOOLKIT_DIR}"
+        fi
         TOOLCHAIN_DEFS="${TOOLCHAIN_DEFS} -D__WXUNIVERSAL__"
         WIDGET_SET=univ
     else
@@ -2180,11 +2260,13 @@ fi
 dnl ---------------------------------------------------------------------------
 dnl OpenGL libraries
 dnl ---------------------------------------------------------------------------
+
 if test "$wxUSE_OPENGL" = "yes"; then
     if test "$wxUSE_MAC" = 1; then
         OPENGL_LIBS="-framework OpenGL -framework AGL"
+    elif test "$wxUSE_MSW" = 1; then
+        OPENGL_LIBS="-lopengl32 -lglu32"
     else
-
         AC_CHECK_HEADER(GL/gl.h,
             [
                 AC_MSG_CHECKING([for -lGL])
@@ -2213,26 +2295,6 @@ if test "$wxUSE_OPENGL" = "yes"; then
                 fi
             ])
 
-    dnl check for OpenGL libs availability first
-    dnl -lGL requires -lm with soem OpenGL versions
-
-#    AC_CHECK_HEADER(GL/gl.h,
-#        [
-#            AC_CHECK_LIB(GL, glFlush,
-#                [
-#                    OPENGL_LIBS="-lGL -lGLU"
-#                ],
-#                [
-#                    AC_CHECK_LIB(MesaGL, glFlush,
-#                        [
-#                            OPENGL_LIBS="-lMesaGL -lMesaGLU"
-#                        ],
-#                        [],
-#                        [-lm])
-#                ],
-#                [-lm])
-#        ])
-
         if test "x$OPENGL_LIBS" = "x"; then
             dnl it should be an error and not a warning because OpenGL is not on
             dnl by default and so if it had been explicitely requested, we
@@ -2289,10 +2351,6 @@ WX_LIBRARY_LINK2="lib${WX_LIBRARY}.${SO_SUFFIX}"
 WX_LIBRARY_LINK1_GL="lib${WX_LIBRARY_GL}.${SO_SUFFIX}.${WX_CURRENT}"
 WX_LIBRARY_LINK2_GL="lib${WX_LIBRARY_GL}.${SO_SUFFIX}"
 
-dnl the name of the resources file for wxMac
-WX_RESOURCES_MACOSX="lib${WX_LIBRARY}.rsrc"
-WX_RESOURCES_MACOSX_COMPILED="lib${WX_LIBRARY}.r"
-
 case "${host}" in
     *-*-cygwin* | *-*-mingw32* )
 
@@ -2311,7 +2369,17 @@ case "${host}" in
             WX_LIBRARY_NAME_SHARED="lib${WX_LIBRARY}.${SO_SUFFIX}"
             WX_LIBRARY_NAME_SHARED_GL="lib${WX_LIBRARY_GL}.${SO_SUFFIX}"
         fi
+        ;;
 
+    *-*-darwin* )
+        dnl Under Mac OS X, we should build real frameworks instead of simple
+        dnl dynamic shared libraries (in order to embed the resources)
+        if test "$wxUSE_MAC" = 1; then
+            dnl the name of the resources file for wxMac
+            WX_RESOURCES_MACOSX_ASCII="lib${WX_LIBRARY}.r" 
+            WX_RESOURCES_MACOSX_DATA="lib${WX_LIBRARY}.rsrc"
+        fi
+        ;;
 esac
 
 dnl the name of the static library
@@ -2424,10 +2492,18 @@ if test "$wxUSE_SHARED" = "yes"; then
       ;;
 
       *-*-darwin* )
-        CFLAGS="$CFLAGS -fno-common -DDYLIB_INIT"
-        CXXFLAGS="$CXXFLAGS -fno-common -DDYLIB_INIT"
-        SHARED_LD="$CXX -dynamiclib -init _wxWindowsDylibInit -o"
+        dnl For Unix to MacOS X porting instructions, see:
+        dnl http://fink.sourceforge.net/doc/porting/porting.html
+        CFLAGS="$CFLAGS -fno-common -DWXMAKINGDLL"
+        CXXFLAGS="$CXXFLAGS -fno-common -DWXMAKINGDLL"
+        dnl wxWindows must be fully binded (lazy binding breaks RTTI classinfo)
+        dnl this can be done either with the exe linker flag -Wl,-bind_at_load
+        dnl or with a double stage link in order to create a single module
+        dnl "-init _wxWindowsDylibInit" not useful with lazy linking solved
+        SHARED_LD="\${top_srcdir}/distrib/mac/shared-ld-sh -undefined suppress -flat_namespace -o"
         PIC_FLAG="-dynamic -fPIC"
+        SONAME_FLAGS="-compatibility_version ${WX_RELEASE} -current_version ${WX_VERSION}"
+        SONAME_FLAGS_GL=${SONAME_FLAGS}
       ;;
 
       *-*-aix* )
@@ -2511,14 +2587,21 @@ fi
 
 if test "$wxUSE_MAC" = 1; then
     dnl add the resources target for wxMac
-    WX_ALL="${WX_ALL} \$(build_libdir)/lib${WX_LIBRARY}.r"
+    LIBWXMACRES="\$(top_builddir)/lib/${WX_RESOURCES_MACOSX_ASCII}"
+    WX_ALL="${WX_ALL} ${LIBWXMACRES}"
     WX_ALL_INSTALLED="${WX_ALL_INSTALLED} preinstall_res"
     AC_CHECK_PROG(RESCOMP, Rez, Rez, /Developer/Tools/Rez)
     AC_CHECK_PROG(DEREZ, DeRez, DeRez, /Developer/Tools/DeRez)
     MACOSX_BUNDLE="bundle"
-    LIBWXMACRES="\$(top_builddir)/lib/lib${WX_LIBRARY}.r"
-    LIBWXMACRESCOMP="\$(RESCOMP) Carbon.r -t APPL ${LIBWXMACRES} -o \$(BIN_PROGRAM)"
-    LIBWXMACRESWXCONFIG="${RESCOMP} Carbon.r -t APPL \${prefix}/lib/${WX_RESOURCES_MACOSX_COMPILED} -o"
+    if test "$wxUSE_SHARED" = "yes"; then
+        dnl resources are bundled with shared library, not with applications
+        LIBWXMACRESCOMP="\$(RESCOMP) -t APPL Carbon.r -o \$(BIN_PROGRAM)"
+        LIBWXMACRESWXCONFIG="${RESCOMP} -t APPL Carbon.r -o"
+    else
+        dnl resources are bundled with applications, not with static library
+        LIBWXMACRESCOMP="\$(RESCOMP) -t APPL Carbon.r ${LIBWXMACRES} -o \$(BIN_PROGRAM)"
+        LIBWXMACRESWXCONFIG="${RESCOMP} -t APPL Carbon.r \${prefix}/lib/${WX_RESOURCES_MACOSX_ASCII} -o"
+    fi
 else
     if test "$wxUSE_PM" = 1; then
         LIBWXMACRESCOMP="emxbind -ep \$(BIN_PROGRAM)"
@@ -2529,11 +2612,11 @@ dnl ------------------------------------------------------------------------
 dnl Check for headers
 dnl ------------------------------------------------------------------------
 
-dnl do not check for strings.h for wxMac
-dnl   it exists but is only a simple redirection to string.h
-dnl   it is in conflict with Strings.h in FlatCarbon headers
+dnl test for strings.h needed under AIX, but do not check for it wxMac as
+dnl it exists but is only a simple redirection to string.h and it is in
+dnl conflict with Strings.h in FlatCarbon headers
 if test "$wxUSE_MAC" != 1; then
-  dnl defines HAVE_STRINGS_H (where some string functions live on AIX for example)
+  dnl defines HAVE_STRINGS_H
   AC_CHECK_HEADERS(strings.h)
 fi
 
@@ -2545,12 +2628,24 @@ dnl defines HAVE_UNISTD_H
 AC_CHECK_HEADERS(unistd.h)
 dnl defines HAVE_WCHAR_H
 AC_CHECK_HEADERS(wchar.h)
-dnl defines HAVE_WCSTR_H
-AC_CHECK_HEADERS(wcstr.h)
-dnl defined HAVE_WCTYPE_H
-AC_CHECK_HEADERS(wctype.h)
+
+dnl maybe wchar_t is in wcstr.h if we don't have wchar.h?
+if test "$ac_cv_header_wchar_h" != "yes"; then
+    dnl defines HAVE_WCSTR_H
+    AC_CHECK_HEADERS(wcstr.h)
+fi
+
+dnl checking for wctype.h is useless as we need wcslen(), not just wchar_t and
+dnl this function is never provided by it
+dnl AC_CHECK_HEADERS(wctype.h)
+
 dnl defines HAVE_FNMATCH_H
 AC_CHECK_HEADERS(fnmatch.h)
+
+if test "x$ac_cv_header_fnmatch_h" = "xyes"; then
+    AC_CHECK_FUNCS(fnmatch)
+fi
+
 dnl defines HAVE_LANGINFO_H (GNU libc locale parameters)
 AC_CHECK_HEADERS(langinfo.h)
 
@@ -2576,37 +2671,6 @@ AC_TYPE_SIZE_T
 dnl   defines uid_t and gid_t if not already defined
 AC_TYPE_UID_T
 
-dnl   check for wchar_t
-dnl   Mac OS X does not provide wchar.h and wchar_t is defined by stdlib.h (GD)
-dnl   on Cygwin wchar.h needs stddef.h to be #included by hand
-AC_CACHE_CHECK([for wchar_t], wx_cv_type_wchar_t,
-[
-    AC_TRY_COMPILE(
-        [
-            #ifdef HAVE_WCHAR_H
-            #  ifdef __CYGWIN__
-            #    include <stddef.h>
-            #  endif
-            #  include <wchar.h>
-            #endif
-            #ifdef HAVE_STDLIB_H
-            #  include <stdlib.h>
-            #endif
-        ],
-        [
-            wchar_t wc, *ws;
-            wc = L'a';
-            ws = L"Hello, world!";
-        ],
-        wx_cv_type_wchar_t=yes,
-        wx_cv_type_wchar_t=no
-    )
-])
-
-if test "$wx_cv_type_wchar_t" = "yes"; then
-    AC_DEFINE(wxUSE_WCHAR_T)
-fi
-
 dnl check what exactly size_t is on this machine - this is necessary to avoid
 dnl ambiguos overloads in several places, notably wx/string.h and wx/array.h
 AC_LANG_SAVE
@@ -2684,90 +2748,52 @@ if test "$wx_cv_struct_pw_gecos" = "yes"; then
     AC_DEFINE(HAVE_PW_GECOS)
 fi
 
-dnl ---------------------------------------------------------------------------
-dnl Checks for compiler characteristics
-dnl ---------------------------------------------------------------------------
-
-dnl defines const to be empty if c-compiler does not support const fully
-AC_C_CONST
-dnl defines inline to a sensible value for the c-compiler
-AC_C_INLINE
-
-dnl check the sizes of integral types (give some reasonable default values for
-dnl cross-compiling)
-dnl   defines the size of certain types of variables in SIZEOF_<TYPE>
-AC_CHECK_SIZEOF(char, 1)
-AC_CHECK_SIZEOF(short, 2)
-AC_CHECK_SIZEOF(void *, 4)
-AC_CHECK_SIZEOF(int, 4)
-AC_CHECK_SIZEOF(long, 4)
-AC_CHECK_SIZEOF(long long, 0)
-
-dnl we have to do it ourselves because SGI/Irix's stdio.h does not include
-dnl wchar_t and AC_CHECK_SIZEOF only includes stdio.h
-dnl Mac OS X does not provide wchar.h and wchar_t is defined by stdlib.h (GD)
-AC_CACHE_CHECK([size of wchar_t], wx_cv_sizeof_wchar_t,
-[
-    AC_TRY_RUN(
-        [
-            #ifdef HAVE_WCHAR_H
-            #  ifdef __CYGWIN__
-            #    include <stddef.h>
-            #  endif
-            #  include <wchar.h>
-            #endif
-            #ifdef HAVE_STDLIB_H
-            #  include <stdlib.h>
-            #endif
-            #include <stdio.h>
-            int main()
-            {
-                FILE *f=fopen("conftestval", "w");
-                if (!f) exit(1);
-                fprintf(f, "%i", sizeof(wchar_t));
-                exit(0);
-            }
-        ],
-        wx_cv_sizeof_wchar_t=`cat conftestval`,
-        wx_cv_sizeof_wchar_t=0,
-        wx_cv_sizeof_wchar_t=4
-    )
-])
-
-AC_DEFINE_UNQUOTED(SIZEOF_WCHAR_T, $wx_cv_sizeof_wchar_t)
-
-dnl for bytesex stuff (don't use AC_C_BIGENDIAN to allow cross-compiling)
-WX_C_BIGENDIAN
-
-dnl check for iostream (as opposed to iostream.h) standard header
-WX_CPP_NEW_HEADERS(, AC_DEFINE(wxUSE_IOSTREAMH))
-
-dnl check whether C++ compiler supports bool built-in type
-WX_CPP_BOOL
-
 dnl ---------------------------------------------------------------------------
 dnl Check for functions
 dnl ---------------------------------------------------------------------------
 
-dnl check for wcslen
-AC_CHECK_LIB(c, wcslen, [
-            AC_DEFINE(HAVE_WCSLEN)
-            WCHAR_LINK=
-        ], [
-            AC_CHECK_LIB(w, wcslen, [
-                AC_DEFINE(HAVE_WCSLEN)
-                WCHAR_LINK=" -lw"
-            ], [
-                AC_CHECK_LIB(msvcrt, wcslen, [
+dnl don't check for wchar_t functions if we haven't got wchar_t itself
+WCHAR_OK=0
+if test "$wx_cv_sizeof_wchar_t" != "0"; then
+    dnl check for wcslen
+    WCHAR_LINK=
+    AC_CHECK_FUNCS(wcslen, [
                     AC_DEFINE(HAVE_WCSLEN)
-                    WCHAR_LINK=
-                ])
+                    WCHAR_OK=1
+                  ])
+
+    if test "$WCHAR_OK" = 0; then
+        if test "$TOOLKIT" = "MSW"; then
+            AC_CHECK_LIB(msvcrt, wcslen, [
+                AC_DEFINE(HAVE_WCSLEN)
+                WCHAR_OK=1
             ])
-        ])
+        else
+            AC_CHECK_LIB(w, wcslen, [
+                            AC_DEFINE(HAVE_WCSLEN)
+                            WCHAR_LINK=" -lw"
+                            WCHAR_OK=1
+                        ])
+        fi
+    fi
+fi
+
+dnl we need at least the definition of wchar_t itself and wcslen() to compile
+dnl with wchar_t support -- turn it off if we don't have this
+if test "$WCHAR_OK" = 1; then
+    AC_DEFINE(wxUSE_WCHAR_T)
 
-dnl use wcsrtombs instead of wcstombs which is buggy in old GNU libc versions
-dnl if possible
-AC_CHECK_FUNCS(wcsrtombs)
+    dnl also try to use wcsrtombs instead of wcstombs which is buggy in old GNU
+    dnl libc versions if possible
+    AC_CHECK_FUNCS(wcsrtombs)
+else
+    dnl use built-in wcslen for Darwin (what about other BSD based systems?)
+    if test "$USE_DARWIN" = 1; then
+        AC_DEFINE(wxUSE_WCHAR_T)
+    else
+        AC_MSG_WARN([Wide character support is unavailable])
+    fi
+fi
 
 dnl check for vprintf/vsprintf() which are GNU extensions
 AC_FUNC_VPRINTF
@@ -3102,17 +3128,19 @@ dnl thread support for Unix (always available under Win32)
 dnl ---------------------------------------------------------------------------
 
 dnl under MSW we always have thread support
+CPP_MT_FLAG=
 if test "$TOOLKIT" != "MSW"; then
 
     dnl the code below:
-    dnl   defines THREADS_OBJ which contains the object files to build
-    dnl   defines THREADS_LINK which contains the thread library to link with
-    dnl   defines wxUSE_THREADS=1 if thread support is activated
+    dnl
+    dnl   defines THREADS_LINK and THREADS_CFLAGS which are the options
+    dnl   necessary to build the MT programs for the linker and compiler
+    dnl   respectively
+    dnl
+    dnl   sets wxUSE_THREADS=1 if thread support is activated
 
     THREADS_LINK=
-    THREADS_OBJ=
-    CODE_GEN_FLAGS=
-    CODE_GEN_FLAGS_CXX=
+    THREADS_CFLAGS=
 
     if test "$wxUSE_THREADS" = "yes" ; then
         if test "$wxUSE_WINE" = 1 ; then
@@ -3126,67 +3154,136 @@ if test "$TOOLKIT" != "MSW"; then
 
     if test "$wxUSE_THREADS" = "yes" ; then
         dnl find if POSIX threads are available
+        dnl
+        dnl the tests here are based on ACX_PTHREAD macro from autoconf macro
+        dnl archive from http://ac-archive.sourceforge.net/
+        dnl
+        dnl thanks to Steven G. Johnson <stevenj@alum.mit.edu> and Alejandro
+        dnl Forero Cuervo <bachue@bachue.com> for the original code
+
+        dnl TODO: cache the result
+
+        dnl define the list of the thread options to try in the loop below
+        dnl with the convention that anything starting with '-' is a cpp flag
+        dnl while anything else is a library (i.e. there is an implicit "-l")
+        THREAD_OPTS="-pthread"
+        case "${host}" in
+          *-*-solaris2* | *-*-sunos4* )
+                if test "x$GCC" = "xyes"; then
+                    dnl Solaris/gcc combination use this one for some reason
+                    THREAD_OPTS="-pthreads $THREAD_OPTS"
+                else
+                    THREAD_OPTS="-mt $THREAD_OPTS"
+                fi
+                ;;
+          *-*-freebsd*)
+                dnl look, in order, for the kernel threads, then Linux threads
+                dnl and finally the userland threads
+                THREAD_OPTS="-kthread lthread $THREAD_OPTS c_r"
+                ;;
+          *-*-darwin*)
+                dnl Darwin / Mac OS X just uses -lpthread tested below
+                THREAD_OPTS=""
+                ;;
+          *-*-aix*)
+                dnl AIX calls the library libpthreads - thanks IBM!
+                THREAD_OPTS="pthreads"
+                ;;
+        esac
 
-        dnl AIX calls the library libpthreads - thanks IBM!
-        if test "$USE_AIX" = 1; then
-            THREADS_LIB=pthreads
-        else
-            THREADS_LIB=pthread
-        fi
+        dnl simply linking with libpthread should make the test below work but
+        dnl it's far from certain that the threaded programs compiled without
+        dnl any special switches actually work, so try it after all the others
+        THREAD_OPTS="$THREAD_OPTS pthread none"
+
+        dnl now test for all possibilities
+        THREADS_OK=no
+        for flag in $THREAD_OPTS; do
+            case $flag in
+                none)
+                    AC_MSG_CHECKING([whether pthreads work without any flags])
+                    ;;
 
-        dnl standard lib name is pthread
-        dnl We no longer test for pthread-0.7 as it breaks compilation on some
-        dnl glibc2 systems, especially for static linkage.
-        AC_CHECK_LIB($THREADS_LIB, pthread_create, [
-                THREADS_OBJ="threadpsx.lo"
-                THREADS_LINK=$THREADS_LIB
-            ], [
-                dnl thread functions are in libc_r under FreeBSD
-                AC_CHECK_LIB(c_r, pthread_create, [
-                    THREADS_OBJ="threadpsx.lo"
-                    THREADS_LINK="c_r"
-                ], [
-                    dnl VZ: SGI threads are not supported currently
-                    AC_CHECK_HEADER(sys/prctl.h, [
-                        THREADS_OBJ="threadsgi.lo"
-                    ])
-                ])
-            ])
+                -*)
+                    AC_MSG_CHECKING([whether pthreads work with $flag])
+                    THREADS_CFLAGS="$flag"
+                    ;;
 
-        if test -z "$THREADS_OBJ" ; then
-            wxUSE_THREADS=no
-            AC_MSG_WARN([No thread support on this system... disabled])
-        fi
+                *)
+                    AC_MSG_CHECKING([for the pthreads library -l$flag])
+                    THREADS_LINK="-l$flag"
+                    ;;
+              esac
+
+              save_LIBS="$LIBS"
+              save_CFLAGS="$CFLAGS"
+              LIBS="$THREADS_LINK $LIBS"
+              CFLAGS="$THREADS_CFLAGS $CFLAGS"
+
+              AC_TRY_LINK([#include <pthread.h>],
+                          [pthread_create(0,0,0,0);],
+                          THREADS_OK=yes)
+
+              LIBS="$save_LIBS"
+              CFLAGS="$save_CFLAGS"
+
+              AC_MSG_RESULT($THREADS_OK)
+              if test "x$THREADS_OK" = "xyes"; then
+                      break;
+              fi
+
+              THREADS_LINK=""
+              THREADS_CFLAGS=""
+      done
+
+      if test "x$THREADS_OK" != "xyes"; then
+          wxUSE_THREADS=no
+          AC_MSG_WARN([No thread support on this system... disabled])
+      else
+          dnl yes, these special compiler flags should be used with the
+          dnl linker as well
+          LIBS="$THREADS_LINK $THREADS_CFLAGS $LIBS"
+
+          AC_MSG_CHECKING([if more special flags are required for pthreads])
+          flag=no
+          case "${host}" in
+            *-aix* | *-freebsd*)
+                flag="-D_THREAD_SAFE"
+                ;;
+            *solaris* | alpha*-osf*)
+                flag="-D_REENTRANT"
+                ;;
+          esac
+          AC_MSG_RESULT(${flag})
+          if test "x$flag" != xno; then
+              THREADS_CFLAGS="$THREADS_CFLAGS $flag"
+          fi
+
+          if test "x$THREADS_CFLAGS" != "x"; then
+            dnl don't add these options to CPPFLAGS as cpp might not know them
+            CFLAGS="$CFLAGS $THREADS_CFLAGS"
+            CXXFLAGS="$CXXFLAGS $THREADS_CFLAGS"
+          fi
+      fi
     fi
 
     dnl do other tests only if we are using threads
     if test "$wxUSE_THREADS" = "yes" ; then
       AC_CHECK_FUNCS(thr_setconcurrency)
 
-      dnl define autoconf macro to check for given function in both pthread and
-      dnl posix4 libraries
-      dnl usage: AC_FUNC_THREAD(FUNCTION_NAME)
-      dnl VZ: TODO
-      dnl AC_DEFUN(AC_FUNC_THREAD,
-      dnl [
-      dnl     AC_CHECK_LIB($THREADS_LINK, $1,
-      dnl            AC_DEFINE(HAVE_`'translit($1, `A-Z', 'a-z'),
-      dnl            [AC_CHECK_LIB([posix4], $1,
-      dnl                [AC_DEFINE(HAVE_`'translit($1, `A-Z', 'a-z'))
-      dnl                 POSIX4_LINK=" -lposix4"
-      dnl             ])
-      dnl            ])
-      dnl ])
-
       AC_CHECK_HEADERS(sched.h)
-
-      AC_CHECK_LIB($THREADS_LINK, sched_yield,
-                   AC_DEFINE(HAVE_SCHED_YIELD),
-                   [AC_CHECK_LIB([posix4], sched_yield,
-                       [AC_DEFINE(HAVE_SCHED_YIELD) POSIX4_LINK=" -lposix4"],
-                       AC_MSG_WARN(wxThread::Yield will not work properly)
-                    )]
-                   )
+      if test "$ac_cv_header_sched_h" = "yes"; then
+          AC_CHECK_FUNC(sched_yield,
+            AC_DEFINE(HAVE_SCHED_YIELD),
+            [
+                AC_CHECK_LIB(posix4,
+                    sched_yield,
+                    [AC_DEFINE(HAVE_SCHED_YIELD) POSIX4_LINK=" -lposix4"],
+                    AC_MSG_WARN(wxThread::Yield will not work properly)
+                )
+            ]
+          )
+      fi
 
       dnl to be able to set the thread priority, we need to have all of the
       dnl following functions:
@@ -3195,9 +3292,9 @@ if test "$TOOLKIT" != "MSW"; then
       dnl      (this one can be in either libpthread or libposix4 (under Solaris))
       dnl   3. pthread_attr_getschedparam and pthread_attr_setschedparam
       HAVE_PRIOR_FUNCS=0
-      AC_CHECK_LIB($THREADS_LINK, pthread_attr_getschedpolicy,
-                     AC_CHECK_LIB($THREADS_LINK, pthread_attr_setschedparam,
-                       AC_CHECK_LIB($THREADS_LINK, sched_get_priority_max,
+      AC_CHECK_FUNC(pthread_attr_getschedpolicy,
+                     AC_CHECK_FUNC(pthread_attr_setschedparam,
+                       AC_CHECK_FUNC(sched_get_priority_max,
                            HAVE_PRIOR_FUNCS=1,
                            AC_CHECK_LIB([posix4], sched_get_priority_max,
                              [
@@ -3215,9 +3312,9 @@ if test "$TOOLKIT" != "MSW"; then
         AC_MSG_WARN(Setting thread priority will not work)
       fi
 
-      AC_CHECK_LIB($THREADS_LINK, pthread_cancel,
-                   AC_DEFINE(HAVE_PTHREAD_CANCEL),
-                   AC_MSG_WARN([wxThread::Kill() will not work properly]))
+      AC_CHECK_FUNC(pthread_cancel,
+                    AC_DEFINE(HAVE_PTHREAD_CANCEL),
+                    AC_MSG_WARN([wxThread::Kill() will not work properly]))
 
       AC_CACHE_CHECK([for pthread_cleanup_push/pop], wx_cv_func_pthread_cleanup_push,
       [
@@ -3249,7 +3346,7 @@ if test "$TOOLKIT" != "MSW"; then
       dnl (strictly speaking we only need _XOPEN_SOURCE=500 but just defining
       dnl this disables _BSD_SOURCE which breaks libtiff compilation, so it is
       dnl simpler to just define _GNU_SOURCE to get everything)
-      if test "x$wx_lib_glibc21" = "xyes"; then
+      if test "x$wx_cv_lib_glibc21" = "xyes"; then
           CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
       fi
 
@@ -3291,16 +3388,6 @@ if test "$TOOLKIT" != "MSW"; then
           AC_MSG_WARN([wxMutex won't be recursive on this platform])
         fi
       fi
-
-      THREADS_LINK=" -l$THREADS_LINK"
-
-      dnl building MT programs under Solaris with the native compiler requires -mt
-      dnl switch
-      if test "$USE_SOLARIS" = "yes" -a "$GCC" != "yes"; then
-          CPPFLAGS="$CFLAGS -mt"
-          CXXFLAGS="$CXXFLAGS -mt"
-          LDFLAGS="$LDFLAGS -mt"
-      fi
     fi
 
 dnl from if !MSW
@@ -3309,9 +3396,6 @@ fi
 if test "$wxUSE_THREADS" = "yes"; then
   AC_DEFINE(wxUSE_THREADS)
 
-  dnl we must define _REENTRANT or something along these lines for MT code
-  TOOLCHAIN_DEFS="$TOOLCHAIN_DEFS $CPP_MT_FLAG"
-
   SAMPLES_SUBDIRS="$SAMPLES_SUBDIRS thread"
 else
   dnl on some systems, _REENTRANT should be defined if we want to use any _r()
@@ -3377,6 +3461,8 @@ if test "$wxUSE_PROFILE" = "yes" ; then
     PROFILE=" -pg"
 fi
 
+CODE_GEN_FLAGS=
+CODE_GEN_FLAGS_CXX=
 if test "$GCC" = "yes" ; then
     if test "$wxUSE_NO_RTTI" = "yes" ; then
         CODE_GEN_FLAGS_CXX="$CODE_GEN_FLAGS_CXX -fno-rtti"
@@ -3395,9 +3481,6 @@ if test "$GCC" = "yes" ; then
     fi
 fi
 
-
-CXXFLAGS=`echo "${CXXFLAGS}" | sed "s/\-O.//g" `
-CFLAGS=`echo "${CFLAGS}" | sed "s/\-O.//g" `
 if test "$wxUSE_OPTIMISE" = "no" ; then
     OPTIMISE=
 else
@@ -3598,6 +3681,7 @@ if test "$wxUSE_DATETIME" = "yes"; then
     AC_CHECK_FUNCS(strptime)
 
     dnl check for timezone variable
+    dnl   doesn't exist under Darwin / Mac OS X which uses tm_gmtoff instead
     AC_CACHE_CHECK(for timezone variable in <time.h>,
                    wx_cv_var_timezone,
                    [
@@ -3638,7 +3722,7 @@ if test "$wxUSE_DATETIME" = "yes"; then
                                             ],
                                             [
                                                 if test "$USE_DOS" = 0 ; then
-                                                    AC_MSG_ERROR(no timezone variable)
+                                                    AC_MSG_WARN(no timezone variable, will use tm_gmtoff instead)
                                                 fi
                                             ]
                                         )
@@ -3945,6 +4029,10 @@ fi
 
 if test "$wxUSE_UNICODE" = "yes" ; then
   AC_DEFINE(wxUSE_UNICODE)
+  
+  if test "$wxUSE_MSW" != 1; then
+      wxUSE_UNICODE_MSLU=no
+  fi
 
   if test "$wxUSE_MSW" = 1 -a "$wxUSE_UNICODE_MSLU" = "yes"; then
         AC_CHECK_LIB(unicows,main,
@@ -4022,14 +4110,7 @@ if test "$wxUSE_HELP" = "yes"; then
 
     if test "$wxUSE_MSW" = 1; then
       if test "$wxUSE_MS_HTML_HELP" = "yes"; then
-        AC_CHECK_HEADER(htmlhelp.h, 
-            [
-                AC_DEFINE(wxUSE_MS_HTML_HELP)
-            ],
-            [
-                AC_MSG_WARN([MS HTML Help cannot be used without htmlhelp.h... disabled])
-                wxUSE_MS_HTML_HELP=no
-            ])
+        AC_DEFINE(wxUSE_MS_HTML_HELP)
       fi
     fi
 
@@ -4574,14 +4655,10 @@ if test "$wxUSE_FONTDLG" = "yes"; then
 fi
 
 if test "$wxUSE_DIRDLG" = "yes"; then
-    if test "$wxUSE_CONSTRAINTS" != "yes"; then
-       AC_MSG_WARN(wxDirDialog requires constraints so it won't be compiled without them)
+    if test "$wxUSE_TREECTRL" != "yes"; then
+        AC_MSG_WARN(wxDirDialog requires wxTreeCtrl so it won't be compiled without it)
     else
-        if test "$wxUSE_TREECTRL" != "yes"; then
-            AC_MSG_WARN(wxDirDialog requires wxTreeCtrl so it won't be compiled without it)
-        else
-            AC_DEFINE(wxUSE_DIRDLG)
-        fi
+        AC_DEFINE(wxUSE_DIRDLG)
     fi
 fi
 
@@ -4666,7 +4743,7 @@ dnl FIXME: should this be covered by the conditional above
 dnl given the -lm comment there?  Or should that comment (and
 dnl this one) be removed..   [ 7 Nov 2001 ]
 
-LIBS="$ZLIB_LINK $POSIX4_LINK $INET_LINK $WCHAR_LINK $THREADS_LINK $DL_LINK -lm $LIBS"
+LIBS="$ZLIB_LINK $POSIX4_LINK $INET_LINK $WCHAR_LINK $DL_LINK -lm $LIBS"
 
 if test "$wxUSE_GUI" = "yes"; then
 
@@ -4677,7 +4754,7 @@ if test "$wxUSE_GUI" = "yes"; then
 
     dnl TODO some samples are never built so far:
     dnl      ipc, mfc, nativdlg, oleauto, ownerdrw
-    SAMPLES_SUBDIRS="$SAMPLES_SUBDIRS controls dialogs \
+    SAMPLES_SUBDIRS="$SAMPLES_SUBDIRS artprov controls dialogs \
                      drawing dynamic erase event exec font image \
                      minimal richedit rotate widgets"
 
@@ -4689,8 +4766,16 @@ fi
 
 
 dnl all -I options we must pass to the compiler
-INCLUDES="-I\${top_builddir}/lib/wx/include/${TOOLCHAIN_NAME} -I\${top_srcdir}/include \
-$REGEX_INCLUDE $ZLIB_INCLUDE $PNG_INCLUDE $JPEG_INCLUDE $TIFF_INCLUDE $TOOLKIT_INCLUDE"
+dnl
+dnl note that the order is somewhat important, in particular the ZLIB_INCLUDE
+dnl and other stuff for the built in libraries should come first to avoid
+dnl including the system headers with the same name (it is particularly
+dnl important for zlib because XFree 4.2.0 has its own, horribly old and
+dnl incompatible, zlib.h) and the wxWindows headers should come first anyhow
+INCLUDES="-I\${top_builddir}/lib/wx/include/${TOOLCHAIN_NAME} \
+-I\${top_srcdir}/include \
+$REGEX_INCLUDE $ZLIB_INCLUDE $PNG_INCLUDE $JPEG_INCLUDE $TIFF_INCLUDE \
+$TOOLKIT_INCLUDE"
 
 dnl wxGTK does not need TOOLKIT includes in wx-config
 if test "$wxUSE_GTK" = 1; then
@@ -4716,10 +4801,12 @@ fi
 
 EXTRA_CFLAGS="$WXDEBUG $WXODBCFLAG $PROFILE $OPTIMISE $INCLUDES"
 
+dnl remove the extra white space from the cc/c++/ld options
 CFLAGS=`echo $CFLAGS $EXTRA_CFLAGS $CXXWARNINGS | sed 's/ \\+/ /g'`
 CXXFLAGS=`echo $CXXFLAGS $EXTRA_CFLAGS $CXXWARNINGS | sed 's/ \+/ /g'`
+LIBS=`echo $LIBS | sed 's/ \+/ /g'`
 
-LDFLAGS="$LDFLAGS$PROFILE"
+LDFLAGS="$LDFLAGS $PROFILE"
 
 dnl for convenience, sort the samples in alphabetical order
 dnl
@@ -4806,6 +4893,7 @@ AC_SUBST(SAMPLES_SUBDIRS)
 dnl additional libraries and linker settings
 AC_SUBST(LDFLAGS)
 AC_SUBST(LDFLAGS_GL)
+AC_SUBST(LDFLAGS_EXE)
 AC_SUBST(OPENGL_LIBS)
 AC_SUBST(DMALLOC_LIBS)
 AC_SUBST(EXTRADEFS)
@@ -4814,8 +4902,8 @@ dnl additional resurces settings
 AC_SUBST(RESCOMP)
 AC_SUBST(RESFLAGS)
 AC_SUBST(RESPROGRAMOBJ)
-AC_SUBST(WX_RESOURCES_MACOSX)
-AC_SUBST(WX_RESOURCES_MACOSX_COMPILED)
+AC_SUBST(WX_RESOURCES_MACOSX_ASCII)
+AC_SUBST(WX_RESOURCES_MACOSX_DATA)
 
 dnl additional for Mac OS X
 AC_SUBST(DEREZ)
@@ -4844,24 +4932,22 @@ fi
 
 AC_CONFIG_HEADER(setup.h:setup.h.in)
 
-dnl some more GUI only things
-if test "$wxUSE_GUI" = "yes"; then
-    dnl we need to pass SAMPLES_SUBDIRS (and some other) to the configure in
-    dnl samples and the only way to do it is, again, use the cache
-    wx_cv_path_samplesubdirs=$SAMPLES_SUBDIRS
-    wx_cv_if_gnu_make=$IF_GNU_MAKE
-    wx_cv_path_ifs=$PATH_IFS
-    wx_cv_program_ext=$PROGRAM_EXT
-    wx_cv_target_library=$WX_TARGET_LIBRARY
-    wx_cv_target_library_gl=$WX_TARGET_LIBRARY_GL
-    wx_cv_target_libtype=$WX_TARGET_LIBRARY_TYPE
-    dnl we need to export them because passing them through cache won't
-    dnl work when cache=/dev/null (which is default for autoconf 2.50)
-    export wx_cv_path_samplesubdirs wx_cv_if_gnu_make \
-           wx_cv_path_ifs wx_cv_program_ext \
-           wx_cv_target_library wx_cv_target_library_gl wx_cv_target_libtype
-    AC_CONFIG_SUBDIRS(demos samples utils contrib)
-fi
+dnl we need to pass SAMPLES_SUBDIRS (and some other) to the configure in
+dnl samples and the only way to do it is to use the environment (another
+dnl idea could have been to use the cache but this wouldn't work when
+dnl configure doesn't use cache at all which is the default with autoconf 2.50)
+wx_cv_path_samplesubdirs=$SAMPLES_SUBDIRS
+wx_cv_if_gnu_make=$IF_GNU_MAKE
+wx_cv_path_ifs=$PATH_IFS
+wx_cv_program_ext=$PROGRAM_EXT
+wx_cv_target_library=$WX_TARGET_LIBRARY
+wx_cv_target_library_gl=$WX_TARGET_LIBRARY_GL
+wx_cv_target_libtype=$WX_TARGET_LIBRARY_TYPE
+export wx_cv_path_samplesubdirs wx_cv_if_gnu_make \
+       wx_cv_path_ifs wx_cv_program_ext \
+       wx_cv_target_library wx_cv_target_library_gl wx_cv_target_libtype
+
+AC_CONFIG_SUBDIRS(demos samples utils contrib)
 
 dnl create each of the files in the space separated list from the file.in
 dnl (the original file name may be overriden by appending another name after a