On Mon, 6 May 2019 at 23:09, Sudhindra kulkarni via cfe-users <[email protected]> wrote: > > > ---------- Forwarded message ---------- > From: "Tim Northover" <[email protected]> > Date: May 1, 2019 3:48 PM > Subject: Re: [llvm-dev] Overriding macro values defined in source code > To: "Sudhindra kulkarni" <[email protected]> > Cc: "LLVM Developers Mailing List" <[email protected]> > > On Tue, 30 Apr 2019 at 22:28, Sudhindra kulkarni via llvm-dev > <[email protected]> wrote: > > Is it possible to override the value of AVAL through the -D option? > > For eg is it possible to set the value of AVAL to 2 through -D in clang ? > > This is more a question for the cfe-users list, but as far as I know > there's no way to prevent redefinitions in source files. > > Cheers. > > Tim. > > Hi Team, > Consider the below C code, > #define AVAL 5 > void func() > { > int a=5; > if(a==AVAL) > { > //Do something > } > else > { > //Do something else > } > > } > My question is > Is it possible to override the value of AVAL through the -D option? > For eg is it possible to set the value of AVAL to 2 through -D in clang so > that the else part executes? > Also apart from -D option we are also open to other ways of achieving this
The normal approach is to change the source to something like #ifndef AVAL #define AVAL 5 #endif > Thanks in advance > _______________________________________________ > cfe-users mailing list > [email protected] > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users _______________________________________________ cfe-users mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
