/* Data base of default implicit rules for GNU Make.
Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software
Foundation, Inc.
This file is part of GNU Make.

GNU Make is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
version.

GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "make.h"
#include "filedef.h"
#include "variable.h"
#include "rule.h"
#include "dep.h"
#include "job.h"
#include "commands.h"

/* Define GCC_IS_NATIVE if gcc is the native development environment on
   your system (gcc/bison/flex vs cc/yacc/lex).  */
#if defined(__MSDOS__) || defined(__EMX__)
# define GCC_IS_NATIVE
#endif


/* This is the default list of suffixes for suffix rules.
   `.s' must come last, so that a `.o' file will be made from
   a `.c' or `.p' or ... file rather than from a .s file.  */

static char default_suffixes[]
#ifdef VMS
  = ".exe .olb .ln .obj .c .cxx .cc .pas .p .for .f .r .y .l .mar \
.s .ss .i .ii .mod .sym .def .h .info .dvi .tex .texinfo .texi .txinfo \
.w .ch .cweb .web .com .sh .elc .el";
#elif defined(__EMX__)
  = ".out .a .ln .o .c .cc .C .cpp .p .f .F .m .r .y .l .ym .yl .s .S \
.mod .sym .def .h .info .dvi .tex .texinfo .texi .txinfo \
.w .ch .web .sh .elc .el .obj .exe .dll .lib";
#else
  = ".out .a .ln .o .c .cc .C .cpp .p .f .F .m .r .y .l .ym .yl .s .S \
.mod .sym .def .h .info .dvi .tex .texinfo .texi .txinfo \
.w .ch .web .sh .elc .el";
#endif

static struct pspec default_pattern_rules[] =
  {
    { "(%)", "%",
	"$(AR) $(ARFLAGS) $@ $<" },

    /* The X.out rules are only in BSD's default set because
       BSD Make has no null-suffix rules, so `foo.out' and
       `foo' are the same thing.  */
#ifdef VMS
    { "%.exe", "%",
        "copy $< $@" },
#else
    { "%.out", "%",
	"@rm -f $@ \n cp $< $@" },
#endif
    /* Syntax is "ctangle foo.w foo.ch foo.c".  */
    { "%.c", "%.w %.ch",
	"$(CTANGLE) $^ $@" },
    { "%.tex", "%.w %.ch",
	"$(CWEAVE) $^ $@" },

    { 0, 0, 0 }
  };

static struct pspec default_terminal_rules[] =
  {
#ifdef VMS
    /* RCS.  */
    { "%", "%$$5lv", /* Multinet style */
        "if f$$search($@) .nes. \"\" then +$(CHECKOUT,v)" },
    { "%", "[.$$rcs]%$$5lv", /* Multinet style */
        "if f$$search($@) .nes. \"\" then +$(CHECKOUT,v)" },
    { "%", "%_v", /* Normal style */
        "if f$$search($@) .nes. \"\" then +$(CHECKOUT,v)" },
    { "%", "[.rcs]%_v", /* Normal style */
        "if f$$search($@) .nes. \"\" then +$(CHECKOUT,v)" },

    /* SCCS.  */
	/* ain't no SCCS on vms */
#else
    /* RCS.  */
    { "%", "%,v",
	"$(CHECKOUT,v)" },
    { "%", "RCS/%,v",
	"$(CHECKOUT,v)" },
    { "%", "RCS/%",
	"$(CHECKOUT,v)" },

    /* SCCS.  */
    { "%", "s.%",
	"$(GET) $(GFLAGS) $(SCCS_OUTPUT_OPTION) $<" },
    { "%", "SCCS/s.%",
	"$(GET) $(GFLAGS) $(SCCS_OUTPUT_OPTION) $<" },
#endif /* !VMS */
    { 0, 0, 0 }
  };

static char *default_suffix_rules[] =
  {
#ifdef VMS
    ".obj.exe",
    "$(LINK.obj) $^ $(LOADLIBES) $(LDLIBS) $(CRT0) /exe=$@",
    ".mar.exe",
    "$(COMPILE.mar) $^ \n $(LINK.obj) $(subst .mar,.obj,$^) $(LOADLIBES) $(LDLIBS) $(CRT0) /exe=$@",
    ".s.exe",
    "$(COMPILE.s) $^ \n $(LINK.obj) $(subst .s,.obj,$^) $(LOADLIBES) $(LDLIBS) $(CRT0) /exe=$@",
    ".c.exe",
    "$(COMPILE.c) $^ \n $(LINK.obj) $(subst .c,.obj,$^) $(LOADLIBES) $(LDLIBS) $(CRT0) /exe=$@",
    ".cc.exe",
#ifdef GCC_IS_NATIVE
    "$(COMPILE.cc) $^ \n $(LINK.obj) $(CXXSTARTUP),sys$$disk:[]$(subst .cc,.obj,$^) $(LOADLIBES) $(LXLIBS) $(LDLIBS) $(CXXRT0) /exe=$@",
#else
    "$(COMPILE.cc) $^ \n $(CXXLINK.obj) $(subst .cc,.obj,$^) $(LOADLIBES) $(LXLIBS) $(LDLIBS) $(CXXRT0) /exe=$@",
    ".cxx.exe",
    "$(COMPILE.cxx) $^ \n $(CXXLINK.obj) $(subst .cxx,.obj,$^) $(LOADLIBES) $(LXLIBS) $(LDLIBS) $(CXXRT0) /exe=$@",
#endif
    ".for.exe",
    "$(COMPILE.for) $^ \n $(LINK.obj) $(subst .for,.obj,$^) $(LOADLIBES) $(LDLIBS) /exe=$@",
    ".pas.exe",
    "$(COMPILE.pas) $^ \n $(LINK.obj) $(subst .pas,.obj,$^) $(LOADLIBES) $(LDLIBS) /exe=$@",

    ".com",
    "copy $< >$@",

    ".mar.obj",
    "$(COMPILE.mar) /obj=$@ $<",
    ".s.obj",
    "$(COMPILE.s) /obj=$@ $<",
    ".ss.obj",
    "$(COMPILE.s) /obj=$@ $<",
    ".c.i",
    "$(COMPILE.c)/prep /list=$@ $<",
    ".c.s",
    "$(COMPILE.c)/noobj/machine /list=$@ $<",
    ".i.s",
    "$(COMPILE.c)/noprep/noobj/machine /list=$@ $<",
    ".c.obj",
    "$(COMPILE.c) /obj=$@ $<",
    ".cc.ii",
    "$(COMPILE.cc)/prep /list=$@ $<",
    ".cc.ss",
    "$(COMPILE.cc)/noobj/machine /list=$@ $<",
    ".ii.ss",
    "$(COMPILE.cc)/noprep/noobj/machine /list=$@ $<",
    ".cc.obj",
    "$(COMPILE.cc) /obj=$@ $<",
    ".cxx.obj",
    "$(COMPILE.cxx) /obj=$@ $<",
    ".for.obj",
    "$(COMPILE.for) /obj=$@ $<",
    ".pas.obj",
    "$(COMPILE.pas) /obj=$@ $<",

    ".y.c",
    "$(YACC.y) $< \n rename y_tab.c $@",
    ".l.c",
    "$(LEX.l) $< \n rename lexyy.c $@",

    ".texinfo.info",
    "$(MAKEINFO) $<",

    ".tex.dvi",
    "$(TEX) $<",

#else /* ! VMS */

    ".o",
    "$(LINK.o) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".s",
    "$(LINK.s) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".S",
    "$(LINK.S) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".c",
    "$(LINK.c) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".cc",
    "$(LINK.cc) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".C",
    "$(LINK.C) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".cpp",
    "$(LINK.cpp) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".f",
    "$(LINK.f) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".m",
    "$(LINK.m) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".p",
    "$(LINK.p) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".F",
    "$(LINK.F) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".r",
    "$(LINK.r) $^ $(LOADLIBES) $(LDLIBS) -o $@",
    ".mod",
    "$(COMPILE.mod) -o $@ -e $@ $^",

    ".def.sym",
    "$(COMPILE.def) -o $@ $<",

    ".sh",
    "cat $< >$@ \n chmod a+x $@",

    ".s.o",
    "$(COMPILE.s) -o $@ $<",
    ".S.o",
    "$(COMPILE.S) -o $@ $<",
    ".c.o",
    "$(COMPILE.c) $(OUTPUT_OPTION) $<",
    ".cc.o",
    "$(COMPILE.cc) $(OUTPUT_OPTION) $<",
    ".C.o",
    "$(COMPILE.C) $(OUTPUT_OPTION) $<",
    ".cpp.o",
    "$(COMPILE.cpp) $(OUTPUT_OPTION) $<",
    ".f.o",
    "$(COMPILE.f) $(OUTPUT_OPTION) $<",
    ".m.o",
    "$(COMPILE.m) $(OUTPUT_OPTION) $<",
    ".p.o",
    "$(COMPILE.p) $(OUTPUT_OPTION) $<",
    ".F.o",
    "$(COMPILE.F) $(OUTPUT_OPTION) $<",
    ".r.o",
    "$(COMPILE.r) $(OUTPUT_OPTION) $<",
    ".mod.o",
    "$(COMPILE.mod) -o $@ $<",

    ".c.ln",
    "$(LINT.c) -C$* $<",
    ".y.ln",
#ifndef __MSDOS__
    "$(YACC.y) $< \n $(LINT.c) -C$* y.tab.c \n $(RM) y.tab.c",
#else
    "$(YACC.y) $< \n $(LINT.c) -C$* y_tab.c \n $(RM) y_tab.c",
#endif
    ".l.ln",
    "@$(RM) $*.c\n $(LEX.l) $< > $*.c\n$(LINT.c) -i $*.c -o $@\n $(RM) $*.c",

    ".y.c",
#ifndef __MSDOS__
    "$(YACC.y) $< \n mv -f y.tab.c $@",
#else
    "$(YACC.y) $< \n mv -f y_tab.c $@",
#endif
    ".l.c",
    "@$(RM) $@ \n $(LEX.l) $< > $@",
    ".ym.m",
    "$(YACC.m) $< \n mv -f y.tab.c $@",
    ".lm.m",
    "@$(RM) $@ \n $(LEX.m) $< > $@",

    ".F.f",
    "$(PREPROCESS.F) $(OUTPUT_OPTION) $<",
    ".r.f",
    "$(PREPROCESS.r) $(OUTPUT_OPTION) $<",

    /* This might actually make lex.yy.c if there's no %R% directive in $*.l,
       but in that case why were you trying to make $*.r anyway?  */
    ".l.r",
    "$(LEX.l) $< > $@ \n mv -f lex.yy.r $@",

    ".S.s",
    "$(PREPROCESS.S) $< > $@",

    ".texinfo.info",
    "$(MAKEINFO) $(MAKEINFO_FLAGS) $< -o $@",

    ".texi.info",
    "$(MAKEINFO) $(MAKEINFO_FLAGS) $< -o $@",

    ".txinfo.info",
    "$(MAKEINFO) $(MAKEINFO_FLAGS) $< -o $@",

    ".tex.dvi",
    "$(TEX) $<",

    ".texinfo.dvi",
    "$(TEXI2DVI) $(TEXI2DVI_FLAGS) $<",

    ".texi.dvi",
    "$(TEXI2DVI) $(TEXI2DVI_FLAGS) $<",

    ".txinfo.dvi",
    "$(TEXI2DVI) $(TEXI2DVI_FLAGS) $<",

    ".w.c",
    "$(CTANGLE) $< - $@",	/* The `-' says there is no `.ch' file.  */

    ".web.p",
    "$(TANGLE) $<",

    ".w.tex",
    "$(CWEAVE) $< - $@",	/* The `-' says there is no `.ch' file.  */

    ".web.tex",
    "$(WEAVE) $<",

#endif /* !VMS */

    0, 0,
  };

static const char *default_variables[] =
  {
#ifdef VMS
#ifdef __ALPHA
    "ARCH", "ALPHA",
#endif
#ifdef __ia64
    "ARCH", "IA64",
#endif
#ifdef __VAX
    "ARCH", "VAX",
#endif
    "AR", "library/obj",
    "ARFLAGS", "/replace",
    "AS", "macro",
    "MACRO", "macro",
#ifdef GCC_IS_NATIVE
    "CC", "gcc",
#else
    "CC", "cc",
#endif
    "CD", "builtin_cd",
    "MAKE", "make",
    "ECHO", "write sys$$output \"",
#ifdef GCC_IS_NATIVE
    "C++", "gcc/plus",
    "CXX", "gcc/plus",
#else
    "C++", "cxx",
    "CXX", "cxx",
    "CXXLD", "cxxlink",
#endif
    "CO", "co",
    "CPP", "$(CC) /preprocess_only",
    "FC", "fortran",
    /* System V uses these, so explicit rules using them should work.
       However, there is no way to make implicit rules use them and FC.  */
    "F77", "$(FC)",
    "F77FLAGS", "$(FFLAGS)",
    "LD", "link",
    "LEX", "lex",
    "PC", "pascal",
    "YACC", "bison/yacc",
    "YFLAGS", "/Define/Verbose",
    "BISON", "bison",
    "MAKEINFO", "makeinfo",
    "TEX", "tex",
    "TEXINDEX", "texindex",

    "RM", "delete/nolog",

    "CSTARTUP", "",
#ifdef GCC_IS_NATIVE
    "CRT0", ",sys$$library:vaxcrtl.olb/lib,gnu_cc_library:crt0.obj",
    "CXXSTARTUP", "gnu_cc_library:crtbegin.obj",
    "CXXRT0", ",sys$$library:vaxcrtl.olb/lib,gnu_cc_library:crtend.obj,gnu_cc_library:gxx_main.obj",
    "LXLIBS", ",gnu_cc_library:libstdcxx.olb/lib,gnu_cc_library:libgccplus.olb/lib",
    "LDLIBS", ",gnu_cc_library:libgcc.olb/lib",
#else
    "CRT0", "",
    "CXXSTARTUP", "",
    "CXXRT0", "",
    "LXLIBS", "",
    "LDLIBS", "",
#endif

    "LINK.obj", "$(LD) $(LDFLAGS)",
#ifndef GCC_IS_NATIVE
    "CXXLINK.obj", "$(CXXLD) $(LDFLAGS)",
    "COMPILE.cxx", "$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH)",
#endif
    "COMPILE.c", "$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH)",
    "COMPILE.cc", "$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH)",
    "YACC.y", "$(YACC) $(YFLAGS)",
    "LEX.l", "$(LEX) $(LFLAGS)",
    "COMPILE.for", "$(FC) $(FFLAGS) $(TARGET_ARCH)",
    "COMPILE.pas", "$(PC) $(PFLAGS) $(CPPFLAGS) $(TARGET_ARCH)",
    "COMPILE.mar", "$(MACRO) $(MACROFLAGS)",
    "COMPILE.s", "$(AS) $(ASFLAGS) $(TARGET_MACH)",
    "LINT.c", "$(LINT) $(LINTFLAGS) $(CPPFLAGS) $(TARGET_ARCH)",

    "MV", "rename/new_version",
    "CP", "copy",

#else /* !VMS */

    "AR", "ar",
    "ARFLAGS", "rv",
    "AS", "as",
#ifdef GCC_IS_NATIVE
    "CC", "gcc",
# ifdef __MSDOS__
    "CXX", "gpp",	/* g++ is an invalid name on MSDOS */
# else
    "CXX", "gcc",
# endif /* __MSDOS__ */
    "OBJC", "gcc",
#else
    "CC", "cc",
    "CXX", "g++",
    "OBJC", "cc",
#endif

    /* This expands to $(CO) $(COFLAGS) $< $@ if $@ does not exist,
       and to the empty string if $@ does exist.  */
    "CHECKOUT,v", "+$(if $(wildcard $@),,$(CO) $(COFLAGS) $< $@)",
    "CO", "co",
    "COFLAGS", "",

    "CPP", "$(CC) -E",
#ifdef	CRAY
    "CF77PPFLAGS", "-P",
    "CF77PP", "/lib/cpp",
    "CFT", "cft77",
    "CF", "cf77",
    "FC", "$(CF)",
#else	/* Not CRAY.  */
#ifdef	_IBMR2
    "FC", "xlf",
#else
#ifdef	__convex__
    "FC", "fc",
#else
    "FC", "f77",
#endif /* __convex__ */
#endif /* _IBMR2 */
    /* System V uses these, so explicit rules using them should work.
       However, there is no way to make implicit rules use them and FC.  */
    "F77", "$(FC)",
    "F77FLAGS", "$(FFLAGS)",
#endif	/* Cray.  */
    "GET", SCCS_GET,
    "LD", "ld",
#ifdef GCC_IS_NATIVE
    "LEX", "flex",
#else
    "LEX", "lex",
#endif
    "LINT", "lint",
    "M2C", "m2c",
#ifdef	pyr
    "PC", "pascal",
#else
#ifdef	CRAY
    "PC", "PASCAL",
    "SEGLDR", "segldr",
#else
    "PC", "pc",
#endif	/* CRAY.  */
#endif	/* pyr.  */
#ifdef GCC_IS_NATIVE
    "YACC", "bison -y",
#else
    "YACC", "yacc",	/* Or "bison -y"  */
#endif
    "MAKEINFO", "makeinfo",
    "TEX", "tex",
    "TEXI2DVI", "texi2dvi",
    "WEAVE", "weave",
    "CWEAVE", "cweave",
    "TANGLE", "tangle",
    "CTANGLE", "ctangle",

    "RM", "rm -f",

    "LINK.o", "$(CC) $(LDFLAGS) $(TARGET_ARCH)",
    "COMPILE.c", "$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
    "LINK.c", "$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
    "COMPILE.m", "$(OBJC) $(OBJCFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
    "LINK.m", "$(OBJC) $(OBJCFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
    "COMPILE.cc", "$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
    "COMPILE.C", "$(COMPILE.cc)",
    "COMPILE.cpp", "$(COMPILE.cc)",
    "LINK.cc", "$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
    "LINK.C", "$(LINK.cc)",
    "LINK.cpp", "$(LINK.cc)",
    "YACC.y", "$(YACC) $(YFLAGS)",
    "LEX.l", "$(LEX) $(LFLAGS) -t",
    "YACC.m", "$(YACC) $(YFLAGS)",
    "LEX.m", "$(LEX) $(LFLAGS) -t",
    "COMPILE.f", "$(FC) $(FFLAGS) $(TARGET_ARCH) -c",
    "LINK.f", "$(FC) $(FFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
    "COMPILE.F", "$(FC) $(FFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
    "LINK.F", "$(FC) $(FFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
    "COMPILE.r", "$(FC) $(FFLAGS) $(RFLAGS) $(TARGET_ARCH) -c",
    "LINK.r", "$(FC) $(FFLAGS) $(RFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
    "COMPILE.def", "$(M2C) $(M2FLAGS) $(DEFFLAGS) $(TARGET_ARCH)",
    "COMPILE.mod", "$(M2C) $(M2FLAGS) $(MODFLAGS) $(TARGET_ARCH)",
    "COMPILE.p", "$(PC) $(PFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
    "LINK.p", "$(PC) $(PFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
    "LINK.s", "$(CC) $(ASFLAGS) $(LDFLAGS) $(TARGET_MACH)",
    "COMPILE.s", "$(AS) $(ASFLAGS) $(TARGET_MACH)",
    "LINK.S", "$(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_MACH)",
    "COMPILE.S", "$(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_MACH) -c",
    "PREPROCESS.S", "$(CC) -E $(CPPFLAGS)",
    "PREPROCESS.F", "$(FC) $(FFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -F",
    "PREPROCESS.r", "$(FC) $(FFLAGS) $(RFLAGS) $(TARGET_ARCH) -F",
    "LINT.c", "$(LINT) $(LINTFLAGS) $(CPPFLAGS) $(TARGET_ARCH)",

#ifndef	NO_MINUS_C_MINUS_O
    "OUTPUT_OPTION", "-o $@",
#endif

#ifdef	SCCS_GET_MINUS_G
    "SCCS_OUTPUT_OPTION", "-G$@",
#endif

#ifdef _AMIGA
    ".LIBPATTERNS", "%.lib",
#else
#ifdef __MSDOS__
    ".LIBPATTERNS", "lib%.a $(DJDIR)/lib/lib%.a",
#else
    ".LIBPATTERNS", "lib%.so lib%.a",
#endif
#endif

#endif /* !VMS */
    0, 0
  };

/* Set up the default .SUFFIXES list.  */

void
set_default_suffixes (void)
{
  suffix_file = enter_file (strcache_add (".SUFFIXES"));

  if (no_builtin_rules_flag)
    define_variable_cname ("SUFFIXES", "", o_default, 0);
  else
    {
      char *p = default_suffixes;
      suffix_file->deps = enter_prereqs(PARSE_FILE_SEQ (&p, struct dep, '\0',
                                                        NULL, 0),
                                        NULL);
      define_variable_cname ("SUFFIXES", default_suffixes, o_default, 0);
    }
}

/* Enter the default suffix rules as file rules.  This used to be done in
   install_default_implicit_rules, but that loses because we want the
   suffix rules installed before reading makefiles, and the pattern rules
   installed after.  */

void
install_default_suffix_rules (void)
{
  char **s;

  if (no_builtin_rules_flag)
    return;

  for (s = default_suffix_rules; *s != 0; s += 2)
    {
      struct file *f = enter_file (strcache_add (s[0]));
      /* Don't clobber cmds given in a makefile if there were any.  */
      if (f->cmds == 0)
	{
	  f->cmds = xmalloc (sizeof (struct commands));
	  f->cmds->fileinfo.filenm = 0;
	  f->cmds->commands = s[1];
	  f->cmds->command_lines = 0;
	}
    }
}


/* Install the default pattern rules.  */

void
install_default_implicit_rules (void)
{
  struct pspec *p;

  if (no_builtin_rules_flag)
    return;

  for (p = default_pattern_rules; p->target != 0; ++p)
    install_pattern_rule (p, 0);

  for (p = default_terminal_rules; p->target != 0; ++p)
    install_pattern_rule (p, 1);
}

void
define_default_variables (void)
{
  const char **s;

  if (no_builtin_variables_flag)
    return;

  for (s = default_variables; *s != 0; s += 2)
    define_variable (s[0], strlen (s[0]), s[1], o_default, 1);
}