On Mon, May 4, 2015 at 3:49 PM, Yunlian Jiang <yunl...@google.com> wrote: > There was a similar disscussion here > https://gcc.gnu.org/ml/gcc/2005-11/msg01190.html
That was a discussion about libiberty. Your subject says you have trouble building gdb. Can you describe the exact problem that you are having? What precisely are you doing? What precisely happens? > The problem is in the configure stage, the __GNU_SOURCE is not > defined, and it could not find > the declaration of asprintf. so it make a declaration of asprintf in > libiberty.h. And for the file floatformat.c, > the __GNU_SOURCE is defined, so it could find another asprintf in > /usr/include/bits/stdio2.h, it also includes > libiberty.h. So these two asprintf conflicts when __USE_FORTIFY_LEVEL is set. I think the basic guideline should be that HAVE_DECL_ASPRINTF should be correct. If libiberty compiled with _GNU_SOURCE defined, then it should test HAVE_DECL_ASPRINTF with _GNU_SOURCE defined. If not, then not. So perhaps the problem is that libiberty is compiling some files with _GNU_SOURCE defined and some not. Ian
