On Wed, Aug 7, 2013 at 7:49 AM, Hei Chan <structurechart@xxxxxxxxx> wrote: > Hi, > > I believe my question has been asked before but my search online has no relevant result. > > Is it possible to figure whether -O3 is enabled in a static library and an executable? I am using GCC 4.6.x. > > Thanks in advance. > > > Cheers, > Hei If you just have the binary without the source, I guess it is impossible to figure out optimization level. If you have source for the same, you can build it with -O0, disassemble the code and compare the compiler code emission for a particular function. In future, if you would like to know the CFLAGS with which it was built, you can export those information to a header as #define's and be included in one of compilation units. Vijay Nag
