Fail to install: Error in coffgen.c

[maxhofidrone]

Hello, I installed successfully ROS Qt Creator Plug-in according their instruction (Ubuntu 18.04 ROS Melodic https://ros-qtc-plugin.readthedocs.io/en/latest/_source/How-to-Install-Users.html). Also the setup according their instruction work fine besides the installation of this repository:

1. I clone the repository, then follow the read-me
2. execute $ ./configure
3. make

then I get following error:

coffgen.c: In function ‘coff_print_symbol’: coffgen.c:2103:8: error: this statement may fall through [-Werror=implicit-fallthrough=] if (combined->u.syment.n_type == T_NULL) ^ coffgen.c:2120:3: note: here case C_EXT: ^~~~ coffgen.c:2122:8: error: this statement may fall through [-Werror=implicit-fallthrough=] if (ISFCN (combined->u.syment.n_type)) ^ coffgen.c:2140:3: note: here default: ^~~ cc1: all warnings being treated as errors Makefile:1618: recipe for target 'coffgen.lo' failed make[4]: [coffgen.lo] Error 1 make[4]: Leaving directory '/home/max/gdb-7.7.1/bfd' Makefile:1660: recipe for target 'all-recursive' failed make[3]: [all-recursive] Error 1 make[3]: Leaving directory '/home/max/gdb-7.7.1/bfd' Makefile:1142: recipe for target 'all' failed make[2]: [all] Error 2 make[2]: Leaving directory '/home/max/gdb-7.7.1/bfd' Makefile:2599: recipe for target 'all-bfd' failed make[1]: [all-bfd] Error 2 make[1]: Leaving directory '/home/max/gdb-7.7.1' Makefile:832: recipe for target 'all' failed make: *** [all] Error 2

What does this mean? How can I fix it? I did not find any information about it online. Flex and bison is installed. I would be very happy for any help about this!

Thanks in advance!

Max

[Levi-Armstrong]

I have not ran into this issue. I recommend asking this question on gbd.

[raultron]

I have the same error with a fresh Ubuntu 18.04.3 LTS install, have you found a solution?

[wlisboa]

I have the same error here, Ubuntu 18.04.3. I google and find that problem [-Werror=implicit-fallthrough=] is related with gcc version, my is 7.4.0. This version complain about "fallthrough" same as "case" without a "break". This ocurs in several parts of code. First i tryed to change the Makefile, but i could't find the flags to ignore those erros than i dig into code puting "attribute((fallthrough));" inside cases, the compiller stops complain but i stuck in another error.

[wlisboa]

"coffgen.c"

`switch (combined->u.syment.n_sclass) {
case C_FILE: fprintf (file, "File "); break;

            case C_STAT:
              if (combined->u.syment.n_type == T_NULL)
                /* Probably a section symbol ?  */
                {    
                  fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d",
                           (unsigned long) auxp->u.auxent.x_scn.x_scnlen,
                           auxp->u.auxent.x_scn.x_nreloc,
                           auxp->u.auxent.x_scn.x_nlinno);
                  if (auxp->u.auxent.x_scn.x_checksum != 0 
                      || auxp->u.auxent.x_scn.x_associated != 0 
                      || auxp->u.auxent.x_scn.x_comdat != 0)
                    fprintf (file, " checksum 0x%lx assoc %d comdat %d",
                             auxp->u.auxent.x_scn.x_checksum,
                             auxp->u.auxent.x_scn.x_associated,
                             auxp->u.auxent.x_scn.x_comdat);
                  break;
                }    
                /* Otherwise fall through.  */
                __attribute__((fallthrough));   **// I put this here**
            case C_EXT:
                __attribute__((fallthrough));
            case C_AIX_WEAKEXT:
              if (ISFCN (combined->u.syment.n_type))
                {    
                  long next, llnos;

                  if (auxp->fix_end)
                    next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
                           - root);
                  else 
                    next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
                  llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr;
                  fprintf (file,
                           "AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld",
                           tagndx,
                           (unsigned long) auxp->u.auxent.x_sym.x_misc.x_fsize,
                           llnos, next);
                  break;
                }    
              /* Otherwise fall through.  */
                __attribute__((fallthrough));

`

[ghost]

I have the same error with Ubuntu 20.

[Yhuiest]

The problem is you have high level GCC ,it will trun some warnings to error, you can use newer version gdb to solve this problem.

[DragonTechRoyale]

Adding -Werror=implicit-fallthrough=0 in the Makefile's WARN_CFLAGS removed the error for me