Ignore newlines with diff

Question

I'd like to ignore newlines when I compare c source files. For example I want following two codes are reported they are same.

// codeA
int main(int argc, char *argv[]) 
{

// codeB
int main(int argc, char *argv[]) {

I already have tried following options but could not get the result.

diff -b codeA codeB
diff -w codeA codeB

Answer 1

There is a tool called "word diff" (tool command line must be 'wdiff') which might help. http://www.gnu.org/software/wdiff/manual/wdiff.html

Answer 2

You can pretty print both files using, for example, GNU Indent, http://www.gnu.org/software/indent/ , and then compare them with diff.