1# @(#)bsd.README 8.2 (Berkeley) 4/2/94 2# $FreeBSD$ 3 4XXX This document is seriously out of date, it is currenly being revised. 5 6This is the README file for the new make "include" files for the BSD 7source tree. The files are installed in /usr/share/mk, and are, by 8convention, named with the suffix ".mk". 9 10bsd.dep.mk - handle Makefile dependencies 11bsd.doc.mk - building troff system documents 12bsd.info.mk - building GNU Info hypertext system 13bsd.kern.mk - define warning flags for compiling the kernel 14bsd.kmod.mk - building loadable kernel modules 15bsd.lib.mk - support for building libraries 16bsd.libnames.mk - define library names 17bsd.man.mk - installing manual pages and their links 18bsd.obj.mk - creating 'obj' directories and cleaning up 19bsd.own.mk - define common variables 20bsd.port.mk - building ports 21bsd.port.subdir.mk - targets for building subdirectories for ports 22bsd.prog.mk - building programs from source files 23bsd.sgml.mk - building SGML documents 24bsd.subdir.mk - targets for building subdirectories 25 26 27Note, this file is not intended to replace reading through the .mk 28files for anything tricky. 29 30See also make(1), mkdep(1) and `PMake - A Tutorial', 31located in /usr/share/doc/psd/12.make. 32 33=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 34 35RANDOM THINGS WORTH KNOWING: 36 37The files are simply C-style #include files, and pretty much behave like 38you'd expect. The syntax is slightly different in that a single '.' is 39used instead of the hash mark, i.e. ".include <bsd.prog.mk>". 40 41One difference that will save you lots of debugging time is that inclusion 42of the file is normally done at the *end* of the Makefile. The reason for 43this is because .mk files often modify variables and behavior based on the 44values of variables set in the Makefile. To make this work, remember that 45the FIRST target found is the target that is used, i.e. if the Makefile has: 46 47 a: 48 echo a 49 a: 50 echo a number two 51 52the command "make a" will echo "a". To make things confusing, the SECOND 53variable assignment is the overriding one, i.e. if the Makefile has: 54 55 a= foo 56 a= bar 57 58 b: 59 echo ${a} 60 61the command "make b" will echo "bar". This is for compatibility with the 62way the V7 make behaved. 63 64It's fairly difficult to make the BSD .mk files work when you're building 65multiple programs in a single directory. It's a lot easier split up the 66programs than to deal with the problem. Most of the agony comes from making 67the "obj" directory stuff work right, not because we switch to a new version 68of make. So, don't get mad at us, figure out a better way to handle multiple 69architectures so we can quit using the symbolic link stuff. (Imake doesn't 70count.) 71 72The file .depend in the source directory is expected to contain dependencies 73for the source files. This file is read automatically by make after reading 74the Makefile. 75 76The variable DESTDIR works as before. It's not set anywhere but will change 77the tree where the file gets installed. 78 79The profiled libraries are no longer built in a different directory than 80the regular libraries. A new suffix, ".po", is used to denote a profiled 81object. 82 83=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 84 85The include file <sys.mk> has the default rules for all makes, in the BSD 86environment or otherwise. You probably don't want to touch this file. 87 88=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 89 90The include file <bsd.man.mk> handles installing manual pages and their 91links. 92 93It has three targets: 94 95 all-man: 96 build manual pages. 97 maninstall: 98 install the manual pages and their links. 99 manlint: 100 verify the validity of manual pages. 101 102It sets/uses the following variables: 103 104MANDIR Base path for manual installation. 105 106MANGRP Manual group. 107 108MANOWN Manual owner. 109 110MANMODE Manual mode. 111 112MANSUBDIR Subdirectory under the manual page section, i.e. "/vax" 113 or "/tahoe" for machine specific manual pages. 114 115MAN The manual pages to be installed (use a .1 - .9 suffix). 116 117MLINKS List of manual page links (using a .1 - .9 suffix). The 118 linked-to file must come first, the linked file second, 119 and there may be multiple pairs. The files are soft-linked. 120 121The include file <bsd.man.mk> includes a file named "../Makefile.inc" if 122it exists. 123 124=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 125 126The include file <bsd.own.mk> contains the owners, groups, etc. for both 127manual pages and binaries. 128 129It has no targets. 130 131It sets/uses the following variables: 132 133BINGRP Binary group. 134 135BINOWN Binary owner. 136 137BINMODE Binary mode. 138 139STRIP The flag passed to the install program to cause the binary 140 to be stripped. This is to be used when building your 141 own install script so that the entire system can be made 142 stripped/not-stripped using a single nob. 143 144MANDIR Base path for manual installation. 145 146MANGRP Manual group. 147 148MANOWN Manual owner. 149 150MANMODE Manual mode. 151 152This file is generally useful when building your own Makefiles so that 153they use the same default owners etc. as the rest of the tree. 154 155=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 156 157The include file <bsd.prog.mk> handles building programs from one or 158more source files, along with their manual pages. It has a limited number 159of suffixes, consistent with the current needs of the BSD tree. 160 161It has seven targets: 162 163 all: 164 build the program and its manual page 165 clean: 166 remove the program, any object files and the files a.out, 167 Errs, errs, mklog, and ${PROG}.core. 168 cleandir: 169 remove all of the files removed by the target clean, as 170 well as .depend, tags, and any manual pages. 171 depend: 172 make the dependencies for the source files, and store 173 them in the file .depend. 174 install: 175 install the program and its manual pages; if the Makefile 176 does not itself define the target install, the targets 177 beforeinstall and afterinstall may also be used to cause 178 actions immediately before and after the install target 179 is executed. 180 lint: 181 run lint on the source files 182 tags: 183 create a tags file for the source files. 184 185It sets/uses the following variables: 186 187BINGRP Binary group. 188 189BINOWN Binary owner. 190 191BINMODE Binary mode. 192 193CLEANFILES Additional files to remove and 194CLEANDIRS additional directories to remove during clean and cleandir 195 targets. "rm -f" and "rm -rf" used respectively. 196 197COPTS Additional flags to the compiler when creating C objects. 198 199FILES A list of non-executable files. 200 The installation is controlled by the FILESNAME, FILESOWN, 201 FILESGRP, FILESMODE, FILESDIR variables that can be 202 further specialized by FILES<VAR>_<file>. 203 204HIDEGAME If HIDEGAME is defined, the binary is installed in 205 /usr/games/hide, and a symbolic link is created to 206 /usr/games/dm. 207 208LDADD Additional loader objects. Usually used for libraries. 209 For example, to load with the compatibility and utility 210 libraries, use: 211 212 LDFILES=-lutil -lcompat 213 214LDFLAGS Additional loader flags. 215 216LINKS The list of binary links; should be full pathnames, the 217 linked-to file coming first, followed by the linked 218 file. The files are hard-linked. For example, to link 219 /bin/test and /bin/[, use: 220 221 LINKS= ${DESTDIR}/bin/test ${DESTDIR}/bin/[ 222 223MAN Manual pages (should end in .1 - .9). If no MAN variable 224 is defined, "MAN=${PROG}.1" is assumed. 225 226PROG The name of the program to build. If not supplied, nothing 227 is built. 228 229PROGNAME The name that the above program will be installed as, if 230 different from ${PROG}. 231 232SRCS List of source files to build the program. If SRCS is not 233 defined, it's assumed to be ${PROG}.c. 234 235DPADD Additional dependencies for the program. Usually used for 236 libraries. For example, to depend on the compatibility and 237 utility libraries use: 238 239 SRCLIB=${LIBCOMPAT} ${LIBUTIL} 240 241 There is a predefined identifier for each (non-profiled, 242 non-shared) library and object. Library file names are 243 transformed to identifiers by removing the extension and 244 converting to upper case. 245 246 There are no special identifiers for profiled or shared 247 libraries or objects. The identifiers for the standard 248 libraries are used in DPADD. This works correctly iff all 249 the libraries are built at the same time. Unfortunately, 250 it causes unnecessary relinks to shared libraries when 251 only the static libraries have changed. Dependencies on 252 shared libraries should be only on the library version 253 numbers. 254 255STRIP The flag passed to the install program to cause the binary 256 to be stripped. 257 258SUBDIR A list of subdirectories that should be built as well. 259 Each of the targets will execute the same target in the 260 subdirectories. 261 262SCRIPTS A list of interpreter scripts [file.{sh,csh,pl,awk,...}]. 263 The installation is controlled by the SCRIPTSNAME, SCRIPTSOWN, 264 SCRIPTSGRP, SCRIPTSMODE, SCRIPTSDIR variables that can be 265 further specialized by SCRIPTS<VAR>_<script>. 266 267The include file <bsd.prog.mk> includes the file named "../Makefile.inc" 268if it exists, as well as the include file <bsd.man.mk>. 269 270Some simple examples: 271 272To build foo from foo.c with a manual page foo.1, use: 273 274 PROG= foo 275 276 .include <bsd.prog.mk> 277 278To build foo from foo.c with a manual page foo.2, add the line: 279 280 MAN2= foo.2 281 282If foo does not have a manual page at all, add the line: 283 284 NOMAN= noman 285 286If foo has multiple source files, add the line: 287 288 SRCS= a.c b.c c.c d.c 289 290=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 291 292The include file <bsd.subdir.mk> contains the default targets for building 293subdirectories. It has the same seven targets as <bsd.prog.mk>: all, clean, 294cleandir, depend, install, lint, and tags. For all of the directories 295listed in the variable SUBDIRS, the specified directory will be visited 296and the target made. There is also a default target which allows the 297command "make subdir" where subdir is any directory listed in the variable 298SUBDIRS. 299 300=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 301 302The include file <bsd.lib.mk> has support for building libraries. It has 303the same seven targets as <bsd.prog.mk>: all, clean, cleandir, depend, 304install, lint, and tags. It has a limited number of suffixes, consistent 305with the current needs of the BSD tree. 306 307It sets/uses the following variables: 308 309LIBDIR Target directory for libraries. 310 311LINTLIBDIR Target directory for lint libraries. 312 313LIBGRP Library group. 314 315LIBOWN Library owner. 316 317LIBMODE Library mode. 318 319LDADD Additional loader objects. 320 321MAN The manual pages to be installed (use a .1 - .9 suffix). 322 323SRCS List of source files to build the library. Suffix types 324 .s, .c, and .f are supported. Note, .s files are preferred 325 to .c files of the same name. (This is not the default for 326 versions of make.) 327 328The include file <bsd.lib.mk> includes the file named "../Makefile.inc" 329if it exists, as well as the include file <bsd.man.mk>. 330 331It has rules for building profiled objects; profiled libraries are 332built by default. 333 334Libraries are ranlib'd before installation. 335