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compile: Add 'set compile-gcc'

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As discussed in
	How to use compile & execute function in GDB
	https://sourceware.org/ml/gdb/2015-04/msg00026.html

GDB currently searches for compilers on /usr/bin/ARCH-OS-gcc and
chooses a match from there.  However, it is not currently possible for
the user to override which compiler to use.  This is what this patch
implements.

It is also a sync between GCC's and GDB's interfaces.

gdb/ChangeLog
2017-08-23  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* NEWS (Changes since GDB 7.9): Add set compile-gcc and show
	compile-gcc.
	* compile/compile.c (compile_gcc, show_compile_gcc): New.
	(compile_to_object): Implement compile_gcc.
	(_initialize_compile): Install "set compile-gcc".  Initialize
	compile_gcc.

gdb/doc/ChangeLog
2017-08-23  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.texinfo (Compiling and Injecting Code): Add to subsection
	"Compiler search for the compile command" descriptions of set
	compile-gcc and show compile-gcc.

include/ChangeLog
2017-08-23  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gcc-interface.h (enum gcc_base_api_version): Update comment for
	GCC_FE_VERSION_1.
	(struct gcc_base_vtable): Rename set_arguments to set_arguments_v0.
	Add set_arguments, set_triplet_regexp and set_driver_filename.
This commit is contained in:
Jan Kratochvil 2017-02-21 13:32:56 -08:00 • committed by Sergio Durigan Junior
parent e68c32d53e
commit 6e41ddec97
7 changed files with 155 additions and 31 deletions
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63
gdb/compile/compile.c
View file

@ -335,6 +335,19 @@ append_args (int *argcp, char ***argvp, int argc, char **argv)
(*argvp)[(*argcp)] = NULL;
}
/* String for 'set compile-gcc' and 'show compile-gcc'. */
static char *compile_gcc;
/* Implement 'show compile-gcc'. */
static void
show_compile_gcc (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("Compile command GCC driver filename is \"%s\".\n"),
value);
}
/* Return DW_AT_producer parsed for get_selected_frame () (if any).
Return NULL otherwise.
@ -452,8 +465,6 @@ compile_to_object (struct command_line *cmd, const char *cmd_string,
int ok;
FILE *src;
struct gdbarch *gdbarch = get_current_arch ();
const char *os_rx;
const char *arch_rx;
char *triplet_rx;
char *error_message;
@ -505,22 +516,39 @@ compile_to_object (struct command_line *cmd, const char *cmd_string,
if (compile_debug)
fprintf_unfiltered (gdb_stdlog, "debug output:\n\n%s", code.c_str ());
os_rx = osabi_triplet_regexp (gdbarch_osabi (gdbarch));
arch_rx = gdbarch_gnu_triplet_regexp (gdbarch);
if (compiler->fe->ops->version >= GCC_FE_VERSION_1)
compiler->fe->ops->set_verbose (compiler->fe, compile_debug);
/* Allow triplets with or without vendor set. */
triplet_rx = concat (arch_rx, "(-[^-]*)?-", os_rx, (char *) NULL);
make_cleanup (xfree, triplet_rx);
if (compile_gcc[0] != 0)
{
if (compiler->fe->ops->version < GCC_FE_VERSION_1)
error (_("Command 'set compile-gcc' requires GCC version 6 or higher "
"(libcc1 interface version 1 or higher)"));
compiler->fe->ops->set_driver_filename (compiler->fe, compile_gcc);
}
else
{
const char *os_rx = osabi_triplet_regexp (gdbarch_osabi (gdbarch));
const char *arch_rx = gdbarch_gnu_triplet_regexp (gdbarch);
/* Allow triplets with or without vendor set. */
triplet_rx = concat (arch_rx, "(-[^-]*)?-", os_rx, (char *) NULL);
make_cleanup (xfree, triplet_rx);
if (compiler->fe->ops->version >= GCC_FE_VERSION_1)
compiler->fe->ops->set_triplet_regexp (compiler->fe, triplet_rx);
}
/* Set compiler command-line arguments. */
get_args (compiler, gdbarch, &argc, &argv);
gdb_argv argv_holder (argv);
if (compiler->fe->ops->version >= GCC_FE_VERSION_1)
compiler->fe->ops->set_verbose (compiler->fe, compile_debug);
error_message = compiler->fe->ops->set_arguments (compiler->fe, triplet_rx,
argc, argv);
error_message = compiler->fe->ops->set_arguments (compiler->fe, argc, argv);
else
error_message = compiler->fe->ops->set_arguments_v0 (compiler->fe, triplet_rx,
argc, argv);
if (error_message != NULL)
{
make_cleanup (xfree, error_message);
@ -742,4 +770,17 @@ String quoting is parsed like in shell, for example:\n\
" -fno-stack-protector"
);
set_compile_args (compile_args, 0, NULL);
add_setshow_optional_filename_cmd ("compile-gcc", class_support,
&compile_gcc,
_("Set compile command "
"GCC driver filename"),
_("Show compile command "
"GCC driver filename"),
_("\
It should be absolute filename of the gcc executable.\n\
If empty the default target triplet will be searched in $PATH."),
NULL, show_compile_gcc, &setlist,
&showlist);
compile_gcc = xstrdup ("");
}