diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6849ce40..d5dac48b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1401,7 +1401,7 @@ CHECK_FUNCTION_EXISTS_GLIBC(localtime_r HAVE_LOCALTIME_R)
 CHECK_FUNCTION_EXISTS_GLIBC(lstat HAVE_LSTAT)
 CHECK_FUNCTION_EXISTS_GLIBC(lutimes HAVE_LUTIMES)
 CHECK_FUNCTION_EXISTS_GLIBC(mbrtowc HAVE_MBRTOWC)
-CHECK_FUNCTION_EXISTS_GLIBC(memmove HAVE_MEMMOVE)
+SET(HAVE_MEMMOVE 1)
 CHECK_FUNCTION_EXISTS_GLIBC(mkdir HAVE_MKDIR)
 CHECK_FUNCTION_EXISTS_GLIBC(mkfifo HAVE_MKFIFO)
 CHECK_FUNCTION_EXISTS_GLIBC(mknod HAVE_MKNOD)
@@ -1434,11 +1434,11 @@ CHECK_FUNCTION_EXISTS_GLIBC(utime HAVE_UTIME)
 CHECK_FUNCTION_EXISTS_GLIBC(utimes HAVE_UTIMES)
 CHECK_FUNCTION_EXISTS_GLIBC(utimensat HAVE_UTIMENSAT)
 CHECK_FUNCTION_EXISTS_GLIBC(vfork HAVE_VFORK)
-CHECK_FUNCTION_EXISTS_GLIBC(wcrtomb HAVE_WCRTOMB)
-CHECK_FUNCTION_EXISTS_GLIBC(wcscmp HAVE_WCSCMP)
-CHECK_FUNCTION_EXISTS_GLIBC(wcscpy HAVE_WCSCPY)
-CHECK_FUNCTION_EXISTS_GLIBC(wcslen HAVE_WCSLEN)
-CHECK_FUNCTION_EXISTS_GLIBC(wctomb HAVE_WCTOMB)
+SET(HAVE_WCRTOMB 1)
+SET(HAVE_WCSCMP 1)
+SET(HAVE_WCSCPY 1)
+SET(HAVE_WCSLEN 1)
+SET(HAVE_WCTOMB 1)
 CHECK_FUNCTION_EXISTS_GLIBC(_fseeki64 HAVE__FSEEKI64)
 CHECK_FUNCTION_EXISTS_GLIBC(_get_timezone HAVE__GET_TIMEZONE)
 CHECK_SYMBOL_EXISTS(ctime_s "time.h" HAVE_CTIME_S)
@@ -1451,10 +1451,10 @@ CHECK_FUNCTION_EXISTS(cygwin_conv_path HAVE_CYGWIN_CONV_PATH)
 CHECK_FUNCTION_EXISTS(fseeko HAVE_FSEEKO)
 CHECK_FUNCTION_EXISTS(strerror_r HAVE_STRERROR_R)
 CHECK_FUNCTION_EXISTS(strftime HAVE_STRFTIME)
-CHECK_FUNCTION_EXISTS(vprintf HAVE_VPRINTF)
-CHECK_FUNCTION_EXISTS(wmemcmp HAVE_WMEMCMP)
-CHECK_FUNCTION_EXISTS(wmemcpy HAVE_WMEMCPY)
-CHECK_FUNCTION_EXISTS(wmemmove HAVE_WMEMMOVE)
+SET(HAVE_VPRINTF 1)
+SET(HAVE_WMEMCMP 1)
+SET(HAVE_WMEMCPY 1)
+SET(HAVE_WMEMMOVE 1)
 
 CMAKE_POP_CHECK_STATE()	# Restore the state of the variables