finally really fixes IRIX build:

- determine the name of the standard libraries directory (lib, lib32, lib64
   or lib/64) and use it to find other standard libraries
 - look in default libraries locations after checking the other ones, not
   before


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35549 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

acinclude.m4

@@ -60,21 +60,30 @@ AC_DEFUN([WX_PATH_FIND_LIBRARIES_IN_PATH],
 ])
 
 dnl ---------------------------------------------------------------------------
-dnl call WX_PATH_FIND_LIBRARIES(search path, header name), sets ac_find_libraries
+dnl return list of standard library paths
-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],
+dnl return all default locations:
-[
-  dnl check in default locations first:
 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
-  WX_PATH_FIND_LIBRARIES_IN_PATH([/usr/lib /usr/lib32 /usr/lib/64 /usr/lib64], $2)
+dnl
-  if test "$ac_find_libraries" != "" ; then
+dnl NB: if any of directories in the list is not a subdir of /usr, code setting
-    ac_find_libraries="default location"
+dnl     wx_cv_std_libpath needs to be updated
-  else
+AC_DEFUN([WX_STD_LIBPATH], [/usr/lib /usr/lib32 /usr/lib/64 /usr/lib64])
+
+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],
+[
   WX_PATH_FIND_LIBRARIES_IN_PATH($1, $2)
+  if test "x$ac_find_libraries" = "x" ; then
+    WX_PATH_FIND_LIBRARIES_IN_PATH(WX_STD_LIBPATH(), $2)
+    if test "x$ac_find_libraries" != "x" ; then
+      ac_find_libraries="default location"
+    fi
   fi
 ])
 

configure.in

@@ -2152,9 +2152,32 @@ SEARCH_INCLUDE="\
                               \
     /usr/openwin/share/include"
 
-dnl add 64 bit X11 libs for Linux on AMD, they must come before the usual
+dnl try to find out the standard lib locations
-dnl locations or 64 bit compilation failed
+AC_CACHE_CHECK([for libraries directory],
-SEARCH_LIB="/usr/X11R6/lib64 `echo "$SEARCH_INCLUDE" | sed s/include/lib/g`"
+    wx_cv_std_libpath,
+    [
+        for d in WX_STD_LIBPATH(); do
+            for e in a so sl dylib dll.a; do
+                libc="$d/libc.$e"
+                if test -f $libc; then
+                    save_LIBS="$LIBS"
+                    LIBS="$libc"
+                    AC_LINK_IFELSE([int main() { return 0; }],
+                        wx_cv_std_libpath=`echo $d | sed s@/usr/@@`)
+                    LIBS="$save_LIBS"
+                    if test "x$wx_cv_std_libpath" != "x"; then
+                        break 2
+                    fi
+                fi
+            done
+        done
+        if test "x$wx_cv_std_libpath" = "x"; then
+            wx_cv_std_libpath="lib"
+        fi
+    ]
+)
+
+SEARCH_LIB=`echo "$SEARCH_INCLUDE" | sed s@include@$wx_cv_std_libpath@g`
 
 dnl Cross compiling with gcc?
 if test "$build" != "$host" -a "$GCC" = yes; then
@@ -3082,22 +3105,23 @@ libraries returned by 'pkg-config gtk+-2.0 --libs' or 'gtk-config
             CFLAGS=$save_CFLAGS
         fi
 
-        if test "$COMPILED_X_PROGRAM" = 0; then
+
         AC_MSG_CHECKING(for Motif/Lesstif library)
         WX_PATH_FIND_LIBRARIES($SEARCH_LIB, Xm)
-            if test "$ac_find_libraries" != "" ; then
+
+        if test "x$ac_find_libraries" != "x" ; then
             AC_MSG_RESULT(found in $ac_find_libraries)
 
             WX_LINK_PATH_EXIST($ac_find_libraries, $GUI_TK_LIBRARY)
             GUI_TK_LIBRARY="$GUI_TK_LIBRARY$ac_path_to_link"
         else
-                dnl it might happen that we found headers in one of the
+            dnl it might happen that we found headers in one of the standard
-                dnl standard paths but the libs are elsewhere - we do need to
+            dnl paths but the libs are elsewhere but still in default (linker)
-                dnl try to compile a sample program then here
+            dnl path -- try to compile a test program to check for this
             save_CFLAGS=$CFLAGS
             CFLAGS="$CFLAGS $TOOLKIT_INCLUDE"
 
-                AC_TRY_COMPILE(
+            AC_TRY_LINK(
                 [
                     #include <Xm/Xm.h>
                 ],
@@ -3117,7 +3141,6 @@ libraries returned by 'pkg-config gtk+-2.0 --libs' or 'gtk-config
 
             CFLAGS=$save_CFLAGS
         fi
-        fi
 
         AC_MSG_CHECKING([if we need -lXp and/or -lSM -lICE])
         libp_link=""