Author: Holger Jaekel <holger.jaekel@gmx.de>
Summary: musl atoll() doesn't return ERANGE in case of overflow
----

--- a/port/cpl_conv.cpp
+++ b/port/cpl_conv.cpp
@@ -1011,8 +1011,6 @@
     return atoll(pszString);
 }
 
-#if defined(__MINGW32__) || defined(__sun__)
-
 // mingw atoll() doesn't return ERANGE in case of overflow
 static int CPLAtoGIntBigExHasOverflow(const char *pszString, GIntBig nVal)
 {
@@ -1035,8 +1033,6 @@
     return strcmp(szBuffer, pszString) != 0;
 }
 
-#endif
-
 /************************************************************************/
 /*                          CPLAtoGIntBigEx()                           */
 /************************************************************************/
@@ -1057,9 +1053,7 @@
     errno = 0;
     GIntBig nVal = strtoll(pszString, nullptr, 10);
     if (errno == ERANGE
-#if defined(__MINGW32__) || defined(__sun__)
         || CPLAtoGIntBigExHasOverflow(pszString, nVal)
-#endif
     )
     {
         if (pbOverflow)