Use newer AC_LANG* test compilation syntax

This commit was SVN r107.

config/cxx_find_exception_flags.m4

@@ -43,13 +43,13 @@ elif test "$GXX" = "yes"; then
 
     AC_LANG_SAVE
     AC_LANG_CPLUSPLUS
-    AC_TRY_COMPILE(, [try { int i = 0; } catch(...) { int j = 2; }], lam_happy=1, lam_happy=0)
+    AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[]], [[try { int i = 0; } catch(...) { int j = 2; }]]), lam_happy=1, lam_happy=0)
 
     if test "$lam_happy" = "1"; then
 	lam_exflags="-fexceptions";
     else
 	CXXFLAGS="$CXXFLAGS_SAVE -fhandle-exceptions"
-	AC_TRY_COMPILE(, [try { int i = 0; } catch(...) { int j = 2; }], lam_happy=1, lam_happy=0)
+	AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[]], [[try { int i = 0; } catch(...) { int j = 2; }]]), lam_happy=1, lam_happy=0)
 	if test "$lam_happy" = "1"; then
 	    lam_exflags="-fhandle-exceptions";
 	fi

config/cxx_have_exceptions.m4

@@ -17,7 +17,7 @@ define([LAM_CXX_HAVE_EXCEPTIONS],[
 AC_MSG_CHECKING([for throw/catch])
 AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
-AC_TRY_COMPILE(, int i=1; throw(i);, 
+AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[]], [[int i=1; throw(i);]]), 
     LAM_CXX_EXCEPTIONS=1, LAM_CXX_EXCPTIONS=0)
 if test "$LAM_CXX_EXCEPTIONS" = "1"; then
     AC_MSG_RESULT([yes])