Hi, This patch adds a -gdwarf option to make gcc generate DWARF with the default version (currently 4).
A bunch of tests in the dejagnu dwarf test suite fail right now if gcc is configured/built with support for multiple debugging formats and DWARF is not the default. The failing tests don't explicitly specify -gdwarf-<version> but check for DWARF data. The tests need a way to ask gcc to generate the latest DWARF version supported. Instead of hardcoding a specific version, adding this option allows the tests to run against the latest supported DWARF version. Version specific DWARF tests can of course use the -gdwarf-<version> option. There was a discussion on this in the mailing list previously (see http://gcc.gnu.org/ml/gcc/2013-04/msg00007.html and http://gcc.gnu.org/ml/gcc/2013-03/msg00271.html) and Jason was ok with a modified version of the patch. The patch merely forwards control to gdwarf- option handling, setting value to the Init value set in common.opt for gdwarf-. In addition, it raises an error if the user specifies a version with the option. If ok, could someone apply please (I don't have commit access) ? Once comitted, I'll send another patch for the failing tests with the -gdwarf option added to dg-options. Regards Senthil gcc/ChangeLog 2013-04-10 Senthil Kumar Selvaraj <senthil_kumar.selva...@atmel.com> Jason Merrill <ja...@redhat.com> diff --git gcc/common.opt gcc/common.opt index e02e7ed..e3645c3 100644 --- gcc/common.opt +++ gcc/common.opt @@ -2308,9 +2308,13 @@ Common JoinedOrMissing Generate debug information in default format gcoff -Common JoinedOrMissing Negative(gdwarf-) +Common JoinedOrMissing Negative(gdwarf) Generate debug information in COFF format +gdwarf +Common JoinedOrMissing UInteger Negative(gdwarf-) +Generate debug information in the default DWARF version format + gdwarf- Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs) Generate debug information in DWARF v2 (or later) format diff --git gcc/opts.c gcc/opts.c index 45b12fe..f96ed16 100644 --- gcc/opts.c +++ gcc/opts.c @@ -1699,6 +1699,18 @@ common_handle_option (struct gcc_options *opts, set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc); break; + case OPT_gdwarf: + if (arg && strlen(arg) != 0) + { + error_at (loc, "%<-gdwarf%s%> is ambiguous; " + "use %<-gdwarf-%s%> for DWARF version " + "or %<-gdwarf -g%s%> for debug level", arg, arg, arg); + break; + } + else + { + value = opts->x_dwarf_version; + } case OPT_gdwarf_: if (value < 2 || value > 4) error_at (loc, "dwarf version %d is not supported", value);
