Compile without readline fails #157
Description
I tried to compile remake 4.3 from git on Ubuntu 22.04 for #156, which fails:
$ make
…
make[1]: Entering directory '~/remake'
gcc -C -Wall -Wbad-function-cast -Wchar-subscripts -Wdeclaration-after-statement -Wdisabled-optimization -Wendif-labels -Wextra -Wformat-security -Wformat-signedness -Winline -Wlogical-op -Wlong-long -Wnested-externs -Wno-sign-compare -Wpointer-arith -Wshadow -Wtype-limits -Wunused -Wunused-but-set-parameter -Wunused-parameter -Wwrite-strings -g -O2 -Wl,--export-dynamic -o make src/alloc.o src/ar.o src/arscan.o src/buildargv.o src/commands.o src/debug.o src/default.o src/dir.o src/expand.o src/file.o src/file_basic.o src/function.o src/getopt.o src/getopt1.o src/globals.o src/guile.o src/hash.o src/implicit.o src/job.o src/load.o src/loadapi.o src/main.o src/misc.o src/output.o src/print.o src/profile.o src/read.o src/remake.o src/rule.o src/signame.o src/strcache.o src/trace.o src/variable.o src/version.o src/vpath.o src/callgrind_format.o src/json_format.o src/posixos.o src/remote-stub.o lib/libgnu.a libdebugger/libdebugger.a
/usr/bin/ld: libdebugger/libdebugger.a(cmd.o): warning: relocation against `short_command' in read-only section `.text'
/usr/bin/ld: libdebugger/libdebugger.a(help.o): in function `dbg_cmd_help':
~/remake/libdebugger/command/help.c:120: undefined reference to `short_command'
/usr/bin/ld: ~/remake/libdebugger/command/help.c:126: undefined reference to `find_command'
/usr/bin/ld: libdebugger/libdebugger.a(help.o): in function `printf':
/usr/include/x86_64-linux-gnu/bits/stdio2.h:112: undefined reference to `short_command'
/usr/bin/ld: libdebugger/libdebugger.a(set.o): in function `dbg_cmd_set':
~/remake/libdebugger/command/set.c:124: undefined reference to `whitespace'
/usr/bin/ld: ~/remake/libdebugger/command/set.c:137: undefined reference to `dbg_cmd_set_var'
/usr/bin/ld: libdebugger/libdebugger.a(show.o): in function `dbg_cmd_show':
~/remake/libdebugger/command/show.c:115: undefined reference to `dbg_cmd_show_command'
/usr/bin/ld: libdebugger/libdebugger.a(cmd.o): in function `enter_debugger':
~/remake/libdebugger/cmd.c:384: undefined reference to `add_history'
/usr/bin/ld: ~/remake/libdebugger/cmd.c:385: undefined reference to `execute_line'
/usr/bin/ld: ~/remake/libdebugger/cmd.c:387: undefined reference to `add_history'
/usr/bin/ld: libdebugger/libdebugger.a(cmd.o): in function `dbg_cmd_break_init':
~/remake/libdebugger/cmd_initialize.h:117: undefined reference to `short_command'
/usr/bin/ld: ~/remake/libdebugger/cmd_initialize.h:118: undefined reference to `short_command'
/usr/bin/ld: libdebugger/libdebugger.a(cmd.o): in function `cmd_initialize':
~/remake/libdebugger/cmd_initialize.h:349: undefined reference to `short_command'
/usr/bin/ld: ~/remake/libdebugger/cmd_initialize.h:349: undefined reference to `short_command'
/usr/bin/ld: libdebugger/libdebugger.a(cmd.o): in function `dbg_cmd_chdir_init':
~/remake/libdebugger/cmd_initialize.h:124: undefined reference to `short_command'
/usr/bin/ld: libdebugger/libdebugger.a(cmd.o):~/remake/libdebugger/cmd_initialize.h:125: more undefined references to `short_command' follow
/usr/bin/ld: libdebugger/libdebugger.a(setq.o): in function `dbg_cmd_setq':
~/remake/libdebugger/command/setq.c:32: undefined reference to `dbg_cmd_set_var'
/usr/bin/ld: libdebugger/libdebugger.a(setqx.o): in function `dbg_cmd_setqx':
~/remake/libdebugger/command/setqx.c:32: undefined reference to `dbg_cmd_set_var'
/usr/bin/ld: libdebugger/libdebugger.a(source.o): in function `dbg_cmd_source':
~/remake/libdebugger/command/source.c:74: undefined reference to `execute_line'
/usr/bin/ld: warning: creating DT_TEXTREL in a PIE
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:1271: make] Error 1
make[1]: Leaving directory '~/remake'
make: *** [Makefile:1415: all-recursive] Error 1A sudo apt install --no-install-recommends libreadline-dev fixed this, but still it would be better if the build process would work when it is unavailable.
At least update the installation documentation to include libreadline-dev.