Without this, a "make all-sim" without the equivalent of
libreadline-dev installed on the build system, won't
properly pick up the in-tree readline build, and you'll see:
mkdir -p -- ./sim
Configuring in ./sim
configure: creating cache ./config.cache
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... cris-axis-elf
checking for x86_64-pc-linux-gnu-gcc... gcc
checking whether the C compiler works... yes
...
checking for library containing tgetent... -ltermcap
checking for readline in -lreadline... no
configure: error: the required "readline" library is missing
make[1]: *** [Makefile:11188: configure-sim] Error 1
make[1]: Leaving directory '/home/hp/sim/b'
The sim dependency on readline is apparently (nominally)
valid as there's a readline call in sim/erc32/sis.c.
2022-02-21 Hans-Peter Nilsson <hp@axis.com>
* Makefile.def (dependencies): Make configure-sim depend on
all-readline.
dependencies = { module=all-sim; on=all-libiberty; };
dependencies = { module=all-sim; on=all-bfd; };
dependencies = { module=all-sim; on=all-opcodes; };
-dependencies = { module=all-sim; on=all-readline; };
+dependencies = { module=configure-sim; on=all-readline; };
// Other host modules.
dependencies = { module=all-fastjar; on=all-zlib; };
install-sid: maybe-install-tk
install-strip-sid: maybe-install-strip-tk
configure-sim: maybe-all-gnulib
-all-sim: maybe-all-readline
+configure-sim: maybe-all-readline
all-fastjar: maybe-all-build-texinfo
all-libctf: all-libiberty
all-stage1-libctf: all-stage1-libiberty