1 Basic Dropbear build instructions: 2 3 - Edit options.h to set which features you want. 4 - Edit debug.h if you want any debug options (not usually required). 5 6 (If using a non-tarball copy, "autoconf; autoheader") 7 8 ./configure (optionally with --disable-zlib or --disable-syslog, 9 or --help for other options) 10 11 Now compile: 12 13 make PROGRAMS="dropbear dbclient dropbearkey dropbearconvert scp" 14 15 And install (/usr/local/bin is usual default): 16 17 make PROGRAMS="dropbear dbclient dropbearkey dropbearconvert scp" install 18 19 (you can leave items out of the PROGRAMS list to avoid compiling them. If you 20 recompile after changing the PROGRAMS list, you *MUST* "make clean" before 21 recompiling - bad things will happen otherwise) 22 23 See MULTI for instructions on making all-in-one binaries. 24 25 If you want to compile statically, add "STATIC=1" to the make command-line. 26 27 Binaries can be strippd with "make strip" 28 29 ============================================================================ 30 31 If you're compiling for a 386-class CPU, you will probably need to add 32 CFLAGS=-DLTC_NO_BSWAP so that libtomcrypt doesn't use 486+ instructions. 33 34 ============================================================================ 35 36 Compiling with uClibc: 37 38 Firstly, make sure you have at least uclibc 0.9.17, as getusershell() in prior 39 versions is broken. Also note that you may get strange issues if your uClibc 40 headers don't match the library you are running with, ie the headers might 41 say that shadow password support exists, but the libraries don't have it. 42 43 Compiling for uClibc should be the same as normal, just set CC to the magic 44 uClibc toolchain compiler (ie export CC=i386-uclibc-gcc or whatever). 45 You can use "make STATIC=1" to make statically linked binaries, and it is 46 advisable to strip the binaries too. If you're looking to make a small binary, 47 you should remove unneeded ciphers and MD5, by editing options.h 48 49 It is possible to compile zlib in, by copying zlib.h and zconf.h into a 50 subdirectory (ie zlibincludes), and 51 52 export CFLAGS="-Izlibincludes -I../zlibincludes" 53 export LDFLAGS=/usr/lib/libz.a 54 55 before ./configure and make. 56 57 If you disable zlib, you must explicitly disable compression for the client - 58 OpenSSH is possibly buggy in this regard, it seems you need to disable it 59 globally in ~/.ssh/config, not just in the host entry in that file. 60 61 You may want to manually disable lastlog recording when using uClibc, configure 62 with --disable-lastlog. 63 64 One common problem is pty allocation. There are a number of types of pty 65 allocation which can be used -- if they work properly, the end result is the 66 same for each type. Running configure should detect the best type to use 67 automatically, however for some systems, this may be incorrect. Some 68 things to note: 69 70 If your system expects /dev/pts to be mounted (this is a uClibc option), 71 make sure that it is. 72 73 Make sure that your libc headers match the library version you are using. 74 75 If openpty() is being used (HAVE_OPENPTY defined in config.h) and it fails, 76 you can try compiling with --disable-openpty. You will probably then need 77 to create all the /dev/pty?? and /dev/tty?? devices, which can be 78 problematic for devfs. In general, openpty() is the best way to allocate 79 PTYs, so it's best to try and get it working. 80
