gdb: remove --disable-gdbmi configure option

I noticed that the --disable-gdbmi option was broken for almost a year
(since 740b42ceb7 "gdb/python/mi: create MI commands using python").

The problem today is the python/py-cmd.c file.  It is included in the
build if Python support is enabled, and it calls into some MI functions
(e.g. insert_mi_cmd_entry).  If MI support is disabled, we get some
undefined symbols like:

    mold: error: undefined symbol: insert_mi_cmd_entry(std::unique_ptr<mi_command, std::default_delete<mi_command> >)
    >>> referenced by py-micmd.c
    >>>               python/py-micmd.o:(micmdpy_install_command(micmdpy_object*))

The python/py-cmd.c file should be included in the build if both Python
and MI support are enabled.  It is not a case we support today, but it
could be done with a bit more configure code.  However, I think we
should just remove the --disable-gdbmi option, and just include MI
support unconditionally.

Tom Tromey proposed a while ago to remove this option, but it ended
staying:

  https://inbox.sourceware.org/gdb-patches/20180628172132.28843-1-tom@tromey.com/

However, there was no strong opposition to remove it.  The argument was
just "bah, it doesn't hurt anybody".

But given today's case, I would rather remove complexity rather than add
some.  I couldn't find anybody caring deeply for that option, and it's
not like MI adds any external dependency.  It's just a bit more code.

Removing the option will not break anybody using --disable-gdbmi (it can
be found in many build scripts [1]), since we don't flag invalid
configure flags.

So, remove the option from configure.ac, and adjust Makefile.in
accordingly to always include the MI objects in the build.

[1] https://github.com/search?q=%22--disable-gdbmi%22&type=code

Change-Id: Ifcaa8c9fc4abc6fa686ed5fd984598644f745240
Approved-By: Tom Tromey <tom@tromey.com>
This commit is contained in:
Simon Marchi 2023-02-14 11:13:43 -05:00
parent eb94f42787
commit 831a223b98
3 changed files with 5 additions and 48 deletions

View file

@ -293,6 +293,7 @@ SUBDIR_MI_SRCS = \
mi/mi-cmd-target.c \
mi/mi-cmd-var.c \
mi/mi-cmds.c \
mi/mi-common.c \
mi/mi-console.c \
mi/mi-getopt.c \
mi/mi-interp.c \
@ -303,10 +304,6 @@ SUBDIR_MI_SRCS = \
SUBDIR_MI_OBS = $(patsubst %.c,%.o,$(SUBDIR_MI_SRCS))
SUBDIR_MI_DEPS =
SUBDIR_MI_LDFLAGS =
SUBDIR_MI_CFLAGS =
#
# TUI sub directory definitions
#
@ -1251,8 +1248,8 @@ SFILES = \
stub-termcap.c \
symfile-mem.c \
ui-file.h \
mi/mi-common.c \
$(SUBDIR_CLI_SRCS) \
$(SUBDIR_MI_SRCS) \
$(SUBDIR_TARGET_SRCS) \
$(COMMON_SFILES) \
$(SUBDIR_GCC_COMPILE_SRCS)
@ -1866,6 +1863,7 @@ COMMON_OBS = $(DEPFILES) $(CONFIG_OBS) $(YYOBJ) \
xml-builtin.o \
$(patsubst %.c,%.o,$(COMMON_SFILES)) \
$(SUBDIR_CLI_OBS) \
$(SUBDIR_MI_OBS) \
$(SUBDIR_TARGET_OBS) \
$(SUBDIR_GCC_COMPILE_OBS)

31
gdb/configure vendored
View file

@ -913,7 +913,6 @@ with_auto_load_safe_path
enable_targets
enable_64_bit_bfd
with_amd_dbgapi
enable_gdbmi
enable_tui
enable_gdbtk
with_debuginfod
@ -1630,7 +1629,6 @@ Optional Features:
--enable-targets=TARGETS
alternative target configurations
--enable-64-bit-bfd 64-bit support (on hosts with narrower word sizes)
--disable-gdbmi disable machine-interface (MI)
--enable-tui enable full-screen terminal user interface (TUI)
--enable-gdbtk enable gdbtk graphical user interface (GUI)
--enable-profiling enable profiling of GDB
@ -11450,7 +11448,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 11453 "configure"
#line 11451 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -11556,7 +11554,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 11559 "configure"
#line 11557 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -18304,31 +18302,6 @@ _ACEOF
fi
# Enable MI.
# Check whether --enable-gdbmi was given.
if test "${enable_gdbmi+set}" = set; then :
enableval=$enable_gdbmi;
case $enableval in
yes | no)
;;
*)
as_fn_error $? "bad value $enableval for --enable-gdbmi" "$LINENO" 5
;;
esac
else
enable_gdbmi=yes
fi
if test x"$enable_gdbmi" = xyes; then
if test -d "$srcdir/mi"; then
CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_MI_OBS)"
CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_MI_DEPS)"
CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_MI_SRCS)"
ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_MI_CFLAGS)"
fi
fi
# Enable TUI.
# Check whether --enable-tui was given.
if test "${enable_tui+set}" = set; then :

View file

@ -318,20 +318,6 @@ if test "x$targ_defvec" != x; then
[Define to BFD's default target vector. ])
fi
# Enable MI.
AC_ARG_ENABLE([gdbmi],
[AS_HELP_STRING([--disable-gdbmi], [disable machine-interface (MI)])],
[GDB_CHECK_YES_NO_VAL([$enableval], [--enable-gdbmi])],
[enable_gdbmi=yes])
if test x"$enable_gdbmi" = xyes; then
if test -d "$srcdir/mi"; then
CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_MI_OBS)"
CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_MI_DEPS)"
CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_MI_SRCS)"
ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_MI_CFLAGS)"
fi
fi
# Enable TUI.
AC_ARG_ENABLE(tui,
AS_HELP_STRING([--enable-tui],