c ++如何将编译器选项检测为字符串

Question

Is there any way to retrieve the options which were used to compile a program? Example: -Wno-unused-result -Werror=declaration-after-statement -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security etc...

I've seen programs that had this in about form, but I can't find if there is some macro that contains the options which were passed to compiler as a string.

Is there some simple, preferably cross-platform way to detect this so that I could do something like

char *options = GCC_COMPILER_FLAGS;

Answer 1

Check the CPPFLAGS environment variable, that usually has the flags which are used to compile a program.

Specifically if you looking to identify the compiler flags within a program it would not be possible.