ff299cff58
bash has a concept of "loadables", which are "plugins" that can be
loaded at runtime by bash to add new builtin. For example:
# type whoami
whoami is hashed (/usr/bin/whoami)
# whoami
root
# enable -f /usr/lib/bash/whoami whoami
# type whoami
whoami is a shell builtin
# whoami
root
# enable -d whoami
# type whoami
whoami is hashed (/usr/bin/whoami)
# whoami
root
bash comes with a set of example loadables, installed in
/usr/lib/bash/. They take 312 KB on ARM32, and are by default not
used, and provide builtins that are for the most part already
available as external commands in Busybox/coreutils:
Makefile.inc finfo mkfifo realpath sync
accept head mktemp rm tee
basename id mypid rmdir truefalse
csv ln pathchk seq tty
cut loadables.h print setpgid uname
dirname logname printenv sleep unlink
fdflags mkdir push strftime whoami
So instead of having them unconditionally installed, add an option to
enable/disable their installation (their build apparently cannot be
disabled via a configure option).
Normally, we try to keep backward compatibility by preserving the
existing behavior. In this case, this would have meant making this
option "default y". But this also breaks our principle of "being
minimal by default", and in this case, it feels preferable to be
"minimal by default" than preserving existing behavior.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
72 lines
2.1 KiB
Makefile
72 lines
2.1 KiB
Makefile
################################################################################
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#
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# bash
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#
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################################################################################
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BASH_VERSION = 5.1
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BASH_SITE = $(BR2_GNU_MIRROR)/bash
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BASH_DEPENDENCIES = ncurses readline host-bison
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BASH_LICENSE = GPL-3.0+
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BASH_LICENSE_FILES = COPYING
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BASH_CPE_ID_VENDOR = gnu
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# We want the bash binary in /bin
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BASH_CONF_OPTS = \
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--bindir=/bin \
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--with-installed-readline \
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--without-bash-malloc
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BASH_CONF_ENV += \
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ac_cv_rl_prefix="$(STAGING_DIR)" \
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ac_cv_rl_version="$(READLINE_VERSION)" \
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bash_cv_getcwd_malloc=yes \
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bash_cv_job_control_missing=present \
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bash_cv_sys_named_pipes=present \
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bash_cv_func_sigsetjmp=present \
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bash_cv_printf_a_format=yes
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# The static build needs some trickery
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ifeq ($(BR2_STATIC_LIBS),y)
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BASH_CONF_OPTS += --enable-static-link
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# bash wants to redefine the getenv() function. To check whether this is
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# possible, AC_TRY_RUN is used which is not possible in
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# cross-compilation.
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# On uClibc, redefining getenv is not possible; on glibc and musl it is.
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# Related:
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# http://lists.gnu.org/archive/html/bug-bash/2012-03/msg00052.html
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ifeq ($(BR2_TOOLCHAIN_USES_UCLIBC),y)
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BASH_CONF_ENV += bash_cv_getenv_redef=no
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else
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BASH_CONF_ENV += bash_cv_getenv_redef=yes
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endif
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endif
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define BASH_REMOVE_UNUSED_FILES
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rm -f $(TARGET_DIR)/bin/bashbug
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endef
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BASH_POST_INSTALL_TARGET_HOOKS += BASH_REMOVE_UNUSED_FILES
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ifeq ($(BR2_PACKAGE_BASH_LOADABLE_EXAMPLES),y)
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define BASH_REMOVE_LOADABLE_UNUSED_FILES
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rm -f $(TARGET_DIR)/usr/lib/bash/Makefile.inc
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rm -f $(TARGET_DIR)/usr/lib/bash/loadables.h
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endef
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BASH_POST_INSTALL_TARGET_HOOKS += BASH_REMOVE_LOADABLE_UNUSED_FILES
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else
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define BASH_REMOVE_LOADABLE_EXAMPLES
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rm -rf $(TARGET_DIR)/usr/lib/bash
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endef
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BASH_POST_INSTALL_TARGET_HOOKS += BASH_REMOVE_LOADABLE_EXAMPLES
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endif
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# Add /bin/bash to /etc/shells otherwise some login tools like dropbear
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# can reject the user connection. See man shells.
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define BASH_ADD_MKSH_TO_SHELLS
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grep -qsE '^/bin/bash$$' $(TARGET_DIR)/etc/shells \
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|| echo "/bin/bash" >> $(TARGET_DIR)/etc/shells
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endef
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BASH_TARGET_FINALIZE_HOOKS += BASH_ADD_MKSH_TO_SHELLS
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$(eval $(autotools-package))
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