diff --git a/build/cmake/setup.cmake b/build/cmake/setup.cmake
index bfa8d60144..8e3ec91d94 100644
--- a/build/cmake/setup.cmake
+++ b/build/cmake/setup.cmake
@@ -533,10 +533,6 @@ if(MSVC)
     check_symbol_exists(vsscanf stdio.h HAVE_VSSCANF)
 endif()
 
-# at least under IRIX with mipsPro the C99 round() function is available when
-# building using the C compiler but not when using C++ one
-check_cxx_symbol_exists(round math.h HAVE_ROUND)
-
 # Check includes
 check_include_file(fcntl.h HAVE_FCNTL_H)
 check_include_file(langinfo.h HAVE_LANGINFO_H)
diff --git a/build/cmake/setup.h.in b/build/cmake/setup.h.in
index 10c59f02a5..7fbe260543 100644
--- a/build/cmake/setup.h.in
+++ b/build/cmake/setup.h.in
@@ -857,9 +857,6 @@
 /* Define if fsync() is available */
 #cmakedefine HAVE_FSYNC 1
 
-/* Define if round() is available */
-#cmakedefine HAVE_ROUND 1
-
 /* Define if you have ftime() */
 #cmakedefine HAVE_FTIME 1
 
diff --git a/configure b/configure
index 7b066ebda7..f35f16bc12 100755
--- a/configure
+++ b/configure
@@ -32936,51 +32936,6 @@ _ACEOF
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for round" >&5
-$as_echo_n "checking for round... " >&6; }
-if ${wx_cv_func_round+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-
-ac_ext=cpp
-ac_cpp='$CXXCPP $CPPFLAGS'
-ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
-
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <math.h>
-int
-main ()
-{
-return int(round(0.0))
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
-  wx_cv_func_round=yes
-else
-  wx_cv_func_round=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $wx_cv_func_round" >&5
-$as_echo "$wx_cv_func_round" >&6; }
-if test "$wx_cv_func_round" = yes; then
-    $as_echo "#define HAVE_ROUND 1" >>confdefs.h
-
-fi
-
 if test "$TOOLKIT" != "MSW"; then
 
 if test "$wxUSE_LIBICONV" != "no" ; then
diff --git a/configure.in b/configure.in
index 7787c0ad21..5e3a8cd147 100644
--- a/configure.in
+++ b/configure.in
@@ -3871,20 +3871,6 @@ if test "$wxUSE_FILE" = "yes"; then
     WX_CHECK_FUNCS(fsync)
 fi
 
-dnl at least under IRIX with mipsPro the C99 round() function is available when
-dnl building using the C compiler but not when using C++ one
-AC_CACHE_CHECK([for round], wx_cv_func_round, [
-AC_LANG_PUSH(C++)
-AC_TRY_LINK(
-    [#include <math.h>],
-    [return int(round(0.0))],
-    wx_cv_func_round=yes, wx_cv_func_round=no)
-AC_LANG_POP()
-])
-if test "$wx_cv_func_round" = yes; then
-    AC_DEFINE(HAVE_ROUND)
-fi
-
 dnl the following tests are for Unix(like) systems only
 if test "$TOOLKIT" != "MSW"; then
 
diff --git a/include/wx/osx/config_xcode.h b/include/wx/osx/config_xcode.h
index fbf6e4b3c7..178edbc100 100644
--- a/include/wx/osx/config_xcode.h
+++ b/include/wx/osx/config_xcode.h
@@ -39,7 +39,6 @@
 #define HAVE_CXA_DEMANGLE 1
 #define HAVE_GETTIMEOFDAY 1
 #define HAVE_FSYNC 1
-#define HAVE_ROUND 1
 #define HAVE_SCHED_YIELD 1
 #define HAVE_PTHREAD_MUTEXATTR_T 1
 #define HAVE_PTHREAD_MUTEXATTR_SETTYPE_DECL 1
diff --git a/setup.h.in b/setup.h.in
index 6af7a1452d..8cd3dcf198 100644
--- a/setup.h.in
+++ b/setup.h.in
@@ -855,9 +855,6 @@
 /* Define if fsync() is available */
 #undef HAVE_FSYNC
 
-/* Define if round() is available */
-#undef HAVE_ROUND
-
 /* Define if you have ftime() */
 #undef HAVE_FTIME