cmake: Check for isblank().

ConfigureChecks.cmake

@@ -93,6 +93,7 @@ endif (NOT WITH_GCRYPT)
 
 # FUNCTIONS
 
+check_function_exists(isblank HAVE_ISBLANK)
 check_function_exists(strncpy HAVE_STRNCPY)
 check_function_exists(vsnprintf HAVE_VSNPRINTF)
 check_function_exists(snprintf HAVE_SNPRINTF)

config.h.cmake

@@ -79,6 +79,9 @@
 /* Define to 1 if you have the `_vsnprintf_s' function. */
 #cmakedefine HAVE__VSNPRINTF_S 1
 
+/* Define to 1 if you have the `isblank' function. */
+#cmakedefine HAVE_ISBLANK 1
+
 /* Define to 1 if you have the `strncpy' function. */
 #cmakedefine HAVE_STRNCPY 1
 

include/libssh/priv.h

@@ -67,7 +67,9 @@
 
 #  define strcasecmp _stricmp
 #  define strncasecmp _strnicmp
-#  define isblank(ch) ((ch) == ' ' || (ch) == '\t' || (ch) == '\n' || (ch) == '\r')
+#  if ! defined(HAVE_ISBLANK)
+#   define isblank(ch) ((ch) == ' ' || (ch) == '\t' || (ch) == '\n' || (ch) == '\r')
+#  endif
 
 #  define usleep(X) Sleep(((X)+1000)/1000)