关于gcc的stack size

This file gives some hints on addressing this problem on different platforms.Under Unix-like systems, programs may throw a "Segmentation Fault"error.  This can be due to stack overflow, especially from recursive function calls or huge data sets.  In our demo program "Pi"(see "$(CORE_PATH)/progs/pi"), we compute Pi to any number of desiredbits or digits.  Here are some test results on when stack overflowswill occur on different platforms, using their default stack sizes.  platformdefault size# bits# digits        ===============================================================SunOS/Solaris8172K bytes<=39875<=12003(Shared Version)Linux 8172K bytes<=62407<=18786Windows1024K bytes<=10581<=3185(Release Version)cygwin2048K bytes<=3630<=1092If we now change their stack size to their maximum, our Pi program can compute more bits. platformstack size# bits# digits        ===============================================================SunOS/Solarisunlimited>=100,00030102Linux8172K bytes<=33,219,282<=10,000,000(?)Windows32768K bytes<=343077<=12041How to change the default stack size on different platforms:In general, under Unix-like platforms, the stack size is controlled by environment variable, not the program itself.  So you cannot pass any flags to the compilers, like gcc, to setup stack size.  Under Windows platforms, thestack size information is contained in the executable files.  It can be set during compilation in Visual C++, but this is not available in gcc. Alternatively, Microsoft provides a program "editbin.exe" which can change theexecutable files directly.  Here are more details:SunOS/Solaris:==============> limit # shows the current stack size> unlimit # changes the stack size to unlimited> setenv STACKSIZE 32768 # limits the stack size to 32M bytesLinux:======> ulimit -a# shows the current stack size> ulimit -s 32768# sets the stack size to 32M bytesWindows (during compilation):=============================1. Select "Project->Setting".2. Select "Link" page.3. Select "Category" to "Output".4. Type your preferred stack size in "Reserve:" field under "Stack    allocations". eg, 32768 in decimal or 0x20000 in hexadecimal.Windows (to modify the executable file):=======================================There are two programs included in Microsoft Visual Studio, "dumpbin.exe" and "editbin.exe".  Run "dumpbin /headers executable_file", and you can see the "size of stack reserve" information in "optional header values".  Run "editbin /STACK:size" to change the default stack size.