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388
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1 /* ellcc.c - front-end for compiling Emacs modules
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2 Copyright (C) 1998, 1999 J. Kean Johnston.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA.
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20
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21 Author: J. Kean Johnston (jkj@sco.com).
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22 Please mail bugs and suggestions to the XEmacs maintainer.
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23 */
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24
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25 /*
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26 Here's the scoop. We would really like this to be a shell script, but
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398
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27 the various Windows platforms don't have reliable scripting that suits
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28 our needs. We don't want to rely on perl or some other such language
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388
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29 so we have to roll our own executable to act as a front-end for the
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30 compiler.
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31
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32 This program is used to invoke the compiler, the linker and to generate
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33 the module specific documentation and initialization code. We assume we
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34 are in 'compile' mode unless we encounter an argument which tells us
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35 that we're not. We take all arguments and pass them on directly to the
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36 compiler, except for a few which are specific to this program:
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37
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38 --mode=VALUE This sets the program mode. VALUE can be one of
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39 compile, link, init or verbose.
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40 --mod-name=NAME Sets the module name to the string NAME.
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41 --mod-title=TITLE Sets the module title to the string TITLE.
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42 --mod-version=VER Sets the module version to the string VER.
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43
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44 The idea is that Makefiles will use ellcc as the compiler for making
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45 dynamic Emacs modules, and life should be as simple as:
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46
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47 make CC=ellcc LD='ellcc --mode=link'
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48
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49 The only additional requirement is an entry in the Makefile to produce
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50 the module initialization file, which will usually be something along
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51 the lines of:
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52
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53 modinit.c: $(SRCS)
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54 ellcc --mode=init --mod-name=\"$(MODNAME)\" \
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55 --mod-title=\"$(MODTITLE)\" --mod-version=\"$(MODVERSION)\" \
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56 -o $@ $(SRCS)
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57
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58 See the samples for more details.
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59 */
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60
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398
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61 #include <config.h>
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388
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62 #include <stdio.h>
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63 #include <stdlib.h>
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64 #include <string.h>
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398
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65 #include <ctype.h>
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66 #include <errno.h>
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67 #include <sys/types.h>
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388
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68
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69 #ifdef HAVE_UNISTD_H
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70 # include <unistd.h>
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71 #endif /* HAVE_UNISTD_H */
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72
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73 #define EMODULES_GATHER_VERSION
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74
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398
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75 #include <emodules.h>
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76 #include <ellcc.h> /* Generated files must be included using <...> */
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388
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77
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78 #define DEBUG
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79
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80 #ifndef HAVE_SHLIB
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81 int
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398
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82 main (int argc, char *argv[])
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388
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83 {
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84 fprintf (stderr, "Dynamic modules not supported on this platform\n");
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398
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85 return EXIT_FAILURE;
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388
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86 }
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87 #else
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88
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89 /*
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90 * Try to figure out the commands we need to use to create shared objects,
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91 * and how to compile for PIC mode.
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92 */
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93
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94 /*
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95 * xnew, xrnew -- allocate, reallocate storage
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96 *
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97 * SYNOPSIS: Type *xnew (int n, Type);
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98 * Type *xrnew (OldPointer, int n, Type);
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99 */
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100 #ifdef chkmalloc
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101 # include "chkmalloc.h"
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102 # define xnew(n,Type) ((Type *) trace_malloc (__FILE__, __LINE__, \
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103 (n) * sizeof (Type)))
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104 # define xrnew(op,n,Type) ((Type *) trace_realloc (__FILE__, __LINE__, \
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105 (op), (n) * sizeof (Type)))
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106 #else
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107 # define xnew(n,Type) ((Type *) xmalloc ((n) * sizeof (Type)))
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108 # define xrnew(op,n,Type) ((Type *) xrealloc ((op), (n) * sizeof (Type)))
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109 #endif
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398
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110 static void *xmalloc (size_t);
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111 static void fatal (char *, char *);
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112 static void add_to_argv (const char *);
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113 static void do_compile_mode (void);
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114 static void do_link_mode (void);
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115 static void do_init_mode (void);
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388
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116
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117 #define SSTR(S) ((S)?(S):"")
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118
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119 #define ELLCC_COMPILE_MODE 0
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120 #define ELLCC_LINK_MODE 1
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121 #define ELLCC_INIT_MODE 2
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122
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123 int ellcc_mode = ELLCC_COMPILE_MODE;
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124 char *progname;
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125 char *mod_name = (char *)0, *mod_version = (char *)0, *mod_title = (char *)0;
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126 char *mod_output = (char *)0;
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127 int verbose = 0;
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128 char **exec_argv;
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129 int exec_argc = 1, *exec_args;
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130 int real_argc = 0;
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131 int prog_argc;
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132 char **prog_argv;
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133
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134 /*
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135 * We allow the user to over-ride things in the environment
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136 */
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137 char *ellcc, *ellld, *ellcflags, *ellldflags, *ellpicflags, *elldllflags;
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138 #define OVERENV(STR,EVAR,DFLT) \
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139 STR = getenv(EVAR); \
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140 if ((STR) == (char *)0) \
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141 STR = DFLT
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142
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143 int
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398
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144 main (int argc, char *argv[])
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388
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145 {
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146 char *tmp;
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147 int i, done_mode = 0;
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148
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149 prog_argc = argc;
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150 prog_argv = argv;
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151
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410
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152 #if defined(WIN32_NATIVE)
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398
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153 tmp = strrchr (argv[0], '\\');
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388
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154 if (tmp != (char *)0)
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155 tmp++;
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156 #elif !defined (VMS)
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398
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157 tmp = strrchr (argv[0], '/');
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388
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158 if (tmp != (char *)0)
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159 tmp++;
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160 #else
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161 tmp = argv[0];
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162 #endif
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163
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164 if (tmp != (char *)0)
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165 progname = tmp;
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166 else
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167 progname = argv[0];
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168
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169 tmp = &progname[strlen(progname)-2];
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170 if (strcmp (tmp, "cc") == 0)
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171 ellcc_mode = ELLCC_COMPILE_MODE;
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172 else if (strcmp (tmp, "ld") == 0)
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173 ellcc_mode = ELLCC_LINK_MODE;
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174 else if (strcmp (tmp, "it") == 0)
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175 ellcc_mode = ELLCC_INIT_MODE;
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176
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177 exec_argv = xnew(argc + 20, char *);
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178 exec_args = xnew(argc, int);
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179 for (i = 0; i < argc; i++)
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180 exec_args[i] = -1;
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181
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182 if (argc < 2)
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183 fatal ("too few arguments", (char *)0);
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184
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185 exec_args[0] = 0;
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186
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187 for (i = 1; i < argc; i++)
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188 {
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189 if (strncmp (argv[i], "--mode=", 7) == 0)
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190 {
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191 char *modeopt = argv[i] + 7;
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192
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193 if (done_mode && strcmp (modeopt, "verbose"))
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398
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194 fatal ("more than one mode specified", (char *) 0);
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388
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195 if (strcmp (modeopt, "link") == 0)
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196 {
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197 done_mode++;
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198 ellcc_mode = ELLCC_LINK_MODE;
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199 }
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200 else if (strcmp (modeopt, "compile") == 0)
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201 {
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202 done_mode++;
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203 ellcc_mode = ELLCC_COMPILE_MODE;
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204 }
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205 else if (strcmp (modeopt, "init") == 0)
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206 {
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207 done_mode++;
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208 ellcc_mode = ELLCC_INIT_MODE;
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209 }
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210 else if (strcmp (modeopt, "verbose") == 0)
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211 verbose += 1;
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212 }
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213 else if (strcmp (argv[i], "--mod-location") == 0)
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214 {
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215 printf ("%s\n", ELLCC_MODDIR);
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216 return 0;
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217 }
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218 else if (strcmp (argv[i], "--mod-site-location") == 0)
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219 {
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220 printf ("%s\n", ELLCC_SITEMODS);
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221 return 0;
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222 }
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223 else if (strcmp (argv[i], "--mod-archdir") == 0)
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224 {
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225 printf ("%s\n", ELLCC_ARCHDIR);
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226 return 0;
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227 }
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228 else if (strcmp (argv[i], "--mod-config") == 0)
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229 {
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230 printf ("%s\n", ELLCC_CONFIG);
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231 return 0;
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232 }
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398
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233 else if (strncmp (argv[i], "--mod-name=", 11) == 0)
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388
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234 mod_name = argv[i] + 11;
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398
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235 else if (strncmp (argv[i], "--mod-title=", 12) == 0)
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388
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236 mod_title = argv[i] + 12;
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398
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237 else if (strncmp (argv[i], "--mod-version=", 14) == 0)
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388
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238 mod_version = argv[i] + 14;
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398
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239 else if (strncmp (argv[i], "--mod-output=", 13) == 0)
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388
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240 mod_output = argv[i] + 13;
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241 else
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242 {
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243 exec_args[exec_argc] = i;
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244 exec_argc++;
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245 }
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246 }
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247
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248 if (ellcc_mode == ELLCC_LINK_MODE && mod_output == (char *)0)
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249 fatal ("must specify --mod-output when linking", (char *)0);
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250 if (ellcc_mode == ELLCC_INIT_MODE && mod_output == (char *)0)
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251 fatal ("must specify --mod-output when creating init file", (char *)0);
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252 if (ellcc_mode == ELLCC_INIT_MODE && mod_name == (char *)0)
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253 fatal ("must specify --mod-name when creating init file", (char *)0);
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254
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255 /*
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256 * We now have the list of arguments to pass to the compiler or
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257 * linker (or to process for doc files). We can do the real work
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258 * now.
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259 */
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260 if (verbose)
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261 printf ("ellcc driver version %s for EMODULES version %s (%ld)\n",
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262 ELLCC_EMACS_VER, EMODULES_VERSION, EMODULES_REVISION);
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263 #ifdef DEBUG
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264 if (verbose >= 2)
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265 {
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266 printf (" mode = %d (%s)\n", ellcc_mode,
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267 ellcc_mode == ELLCC_COMPILE_MODE ? "compile" :
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268 ellcc_mode == ELLCC_LINK_MODE ? "link" : "init");
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269 printf (" module_name = \"%s\"\n", SSTR(mod_name));
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270 printf (" module_title = \"%s\"\n", SSTR(mod_title));
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271 printf (" module_version = \"%s\"\n", SSTR(mod_version));
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272
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273 printf (" CC = %s\n", ELLCC_CC);
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274 printf (" CFLAGS = %s\n", ELLCC_CFLAGS);
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275 printf (" CC PIC flags = %s\n", ELLCC_DLL_CFLAGS);
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276 printf (" LD = %s\n", ELLCC_DLL_LD);
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277 printf (" LDFLAGS = %s\n", ELLCC_DLL_LDFLAGS);
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278 printf (" architecture = %s\n", ELLCC_CONFIG);
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279 printf (" Include directory = %s/include\n", ELLCC_ARCHDIR);
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280 printf ("\n");
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281 }
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282 #endif
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283
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284 if (exec_argc < 2)
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398
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285 fatal ("too few arguments", (char *) 0);
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388
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286
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287 /*
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288 * Get the over-rides from the environment
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289 */
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290 OVERENV(ellcc, "ELLCC", ELLCC_CC);
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291 OVERENV(ellld, "ELLLD", ELLCC_DLL_LD);
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292 OVERENV(ellcflags, "ELLCFLAGS", ELLCC_CFLAGS);
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293 OVERENV(ellldflags, "ELLLDFLAGS", ELLCC_LDFLAGS);
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294 OVERENV(elldllflags, "ELLDLLFLAGS", ELLCC_DLL_LDFLAGS);
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295 OVERENV(ellpicflags, "ELLPICFLAGS", ELLCC_DLL_CFLAGS);
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296
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297 if (ellcc_mode == ELLCC_COMPILE_MODE)
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298 do_compile_mode();
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299 else if (ellcc_mode == ELLCC_LINK_MODE)
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300 do_link_mode();
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301 else
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302 do_init_mode();
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303
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304 /*
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305 * The arguments to pass on to the desired program have now been set
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306 * up and we can run the program.
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307 */
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308 if (verbose)
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309 {
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310 for (i = 0; i < real_argc; i++)
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311 printf ("%s ", exec_argv[i]);
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312 printf ("\n");
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313 fflush (stdout);
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314 }
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315 exec_argv[real_argc] = (char *)0; /* Terminate argument list */
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316
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317 i = execvp (exec_argv[0], exec_argv);
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318 if (verbose)
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319 printf ("%s exited with status %d\n", exec_argv[0], i);
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320 return i;
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321 }
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322
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|
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323 /* Like malloc but get fatal error if memory is exhausted. */
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|
398
|
324 static void *
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325 xmalloc (size_t size)
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388
|
326 {
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|
398
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327 void *result = malloc (size);
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|
388
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328 if (result == NULL)
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|
398
|
329 fatal ("virtual memory exhausted", (char *)0);
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|
388
|
330 return result;
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331 }
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332
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|
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333 /* Print error message and exit. */
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|
398
|
334 static void
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335 fatal (char *s1, char *s2)
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|
388
|
336 {
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|
|
337 fprintf (stderr, "%s: ", progname);
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|
|
338 fprintf (stderr, s1, s2);
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|
|
339 fprintf (stderr, "\n");
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|
398
|
340 exit (EXIT_FAILURE);
|
|
388
|
341 }
|
|
|
342
|
|
|
343 /*
|
|
|
344 * Add a string to the argument vector list that will be passed on down
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|
|
345 * to the compiler or linker. We need to split individual words into
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|
346 * arguments, taking quoting into account. This can get ugly.
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|
|
347 */
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|
398
|
348 static void
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|
|
349 add_to_argv (const char *str)
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|
388
|
350 {
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|
|
351 int sm = 0;
|
|
398
|
352 const char *s = (const char *)0;
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|
388
|
353
|
|
398
|
354 if ((str == (const char *)0) || (str[0] == '\0'))
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|
388
|
355 return;
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|
|
356
|
|
|
357 while (*str)
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|
|
358 {
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|
|
359 switch (sm)
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|
|
360 {
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|
|
361 case 0: /* Start of case - string leading whitespace */
|
|
398
|
362 if (isspace ((unsigned char) *str))
|
|
388
|
363 str++;
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|
|
364 else
|
|
|
365 {
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|
|
366 sm = 1; /* Change state to non-whitespace */
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|
|
367 s = str; /* Mark the start of THIS argument */
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|
|
368 }
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|
369 break;
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370
|
|
|
371 case 1: /* Non-whitespace character. Mark the start */
|
|
398
|
372 if (isspace ((unsigned char) *str))
|
|
388
|
373 {
|
|
|
374 /* Reached the end of the argument. Add it. */
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|
|
375 int l = str-s;
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|
|
376 exec_argv[real_argc] = xnew (l+2, char);
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|
|
377 strncpy (exec_argv[real_argc], s, l);
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|
|
378 exec_argv[real_argc][l] = '\0';
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|
|
379 real_argc++;
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|
|
380 sm = 0; /* Back to start state */
|
|
398
|
381 s = (const char *)0;
|
|
388
|
382 break;
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|
|
383 }
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|
|
384 else if (*str == '\\')
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|
|
385 {
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|
|
386 sm = 2; /* Escaped character */
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|
|
387 str++;
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|
|
388 break;
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|
|
389 }
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|
|
390 else if (*str == '\'')
|
|
|
391 {
|
|
|
392 /* Start of quoted string (single quotes) */
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|
|
393 sm = 3;
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|
|
394 }
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|
|
395 else if (*str == '"')
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396 {
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|
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397 /* Start of quoted string (double quotes) */
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398 sm = 4;
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|
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399 }
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|
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400 else
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401 {
|
|
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402 /* This was just a normal character. Advance the pointer. */
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403 str++;
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|
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404 }
|
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405 break;
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406
|
|
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407 case 2: /* Escaped character */
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408 str++; /* Preserve the quoted character */
|
|
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409 sm = 1; /* Go back to gathering state */
|
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410 break;
|
|
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411
|
|
|
412 case 3: /* Inside single quoted string */
|
|
|
413 if (*str == '\'')
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414 sm = 1;
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415 str++;
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|
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416 break;
|
|
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417
|
|
|
418 case 4: /* inside double quoted string */
|
|
|
419 if (*str == '"')
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|
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420 sm = 1;
|
|
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421 str++;
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|
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422 break;
|
|
|
423 }
|
|
|
424 }
|
|
|
425
|
|
398
|
426 if (s != (const char *)0)
|
|
388
|
427 {
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|
|
428 int l = str-s;
|
|
|
429 exec_argv[real_argc] = xnew (l+2, char);
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|
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430 strncpy (exec_argv[real_argc], s, l);
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|
|
431 exec_argv[real_argc][l] = '\0';
|
|
|
432 real_argc++;
|
|
398
|
433 s = (const char *)0;
|
|
388
|
434 }
|
|
|
435 }
|
|
|
436
|
|
|
437 /*
|
|
|
438 * For compile mode, things are pretty straight forward. All we need to do
|
|
|
439 * is build up the argument vector and exec() it. We must just make sure
|
|
|
440 * that we get all of the required arguments in place.
|
|
|
441 */
|
|
398
|
442 static void
|
|
|
443 do_compile_mode (void)
|
|
388
|
444 {
|
|
|
445 int i;
|
|
|
446 char ts[4096]; /* Plenty big enough */
|
|
|
447
|
|
|
448 add_to_argv (ellcc);
|
|
|
449 add_to_argv (ellcflags);
|
|
|
450 add_to_argv (ellpicflags);
|
|
|
451 add_to_argv ("-DPIC");
|
|
|
452 add_to_argv ("-DEMACS_MODULE");
|
|
|
453 #ifdef XEMACS
|
|
|
454 add_to_argv ("-DXEMACS_MODULE"); /* Cover both cases */
|
|
|
455 add_to_argv ("-Dxemacs");
|
|
|
456 #endif
|
|
|
457 add_to_argv ("-Demacs");
|
|
|
458 sprintf (ts, "-I%s/include", ELLCC_ARCHDIR);
|
|
|
459 add_to_argv (ts);
|
|
|
460 add_to_argv (ELLCC_CF_ALL);
|
|
|
461 for (i = 1; i < exec_argc; i++)
|
|
|
462 exec_argv[real_argc++] = strdup (prog_argv[exec_args[i]]);
|
|
|
463 }
|
|
|
464
|
|
|
465 /*
|
|
|
466 * For link mode, things are a little bit more complicated. We need to
|
|
|
467 * insert the linker commands first, replace any occurrence of ELLSONAME
|
|
|
468 * with the desired output file name, insert the output arguments, then
|
|
|
469 * all of the provided arguments, then the final post arguments. Once
|
|
|
470 * all of this has been done, the argument vector is ready to run.
|
|
|
471 */
|
|
398
|
472 static void
|
|
|
473 do_link_mode (void)
|
|
388
|
474 {
|
|
|
475 int i,x;
|
|
|
476 char *t, ts[4096]; /* Plenty big enough */
|
|
|
477
|
|
|
478 add_to_argv (ellld);
|
|
|
479 add_to_argv (ellldflags);
|
|
|
480 add_to_argv (elldllflags);
|
|
|
481 add_to_argv (ELLCC_DLL_LDO);
|
|
|
482 add_to_argv (mod_output);
|
|
|
483 for (i = 1; i < exec_argc; i++)
|
|
|
484 exec_argv[real_argc++] = strdup (prog_argv[exec_args[i]]);
|
|
|
485 add_to_argv (ELLCC_DLL_POST);
|
|
|
486
|
|
|
487 /*
|
|
|
488 * Now go through each argument and replace ELLSONAME with mod_output.
|
|
|
489 */
|
|
|
490 for (i = 0; i < real_argc; i++)
|
|
|
491 {
|
|
|
492 x = 0;
|
|
|
493 ts[0] = '\0';
|
|
|
494
|
|
|
495 t = exec_argv[i];
|
|
|
496 while (*t)
|
|
|
497 {
|
|
|
498 if (*t == 'E')
|
|
|
499 {
|
|
|
500 if (strncmp (t, "ELLSONAME", 9) == 0)
|
|
|
501 {
|
|
|
502 strcat (ts, mod_output);
|
|
|
503 t += 8;
|
|
|
504 x += strlen (mod_output);
|
|
|
505 }
|
|
|
506 else
|
|
|
507 {
|
|
|
508 ts[x] = *t;
|
|
|
509 x++;
|
|
|
510 ts[x] = '\0';
|
|
|
511 }
|
|
|
512 }
|
|
|
513 else
|
|
|
514 {
|
|
|
515 ts[x] = *t;
|
|
|
516 x++;
|
|
|
517 ts[x] = '\0';
|
|
|
518 }
|
|
|
519 t++;
|
|
|
520 }
|
|
|
521 free (exec_argv[i]);
|
|
|
522 exec_argv[i] = strdup (ts);
|
|
|
523 }
|
|
|
524 }
|
|
|
525
|
|
|
526 /*
|
|
|
527 * In init mode, things are a bit easier. We assume that the only things
|
|
|
528 * passed on the command line are the names of source files which the
|
|
|
529 * make-doc program will be processing. We prepare the output file with
|
|
|
530 * the header information first, as make-doc will append to the file by
|
|
|
531 * special dispensation.
|
|
|
532 */
|
|
398
|
533 static void
|
|
|
534 do_init_mode (void)
|
|
388
|
535 {
|
|
|
536 int i;
|
|
|
537 char ts[4096]; /* Plenty big enough */
|
|
|
538 char *mdocprog;
|
|
|
539 FILE *mout = fopen (mod_output, "w");
|
|
|
540
|
|
|
541 if (mout == (FILE *)0)
|
|
|
542 fatal ("failed to open output file", mod_output);
|
|
|
543 fprintf (mout, "/* DO NOT EDIT - AUTOMATICALLY GENERATED */\n\n");
|
|
|
544 fprintf (mout, "#include <emodules.h>\n\n");
|
|
|
545 fprintf (mout, "const long emodule_compiler = %ld;\n", EMODULES_REVISION);
|
|
|
546 fprintf (mout, "const char *emodule_name = \"%s\";\n", SSTR(mod_name));
|
|
|
547 fprintf (mout, "const char *emodule_version = \"%s\";\n", SSTR(mod_version));
|
|
|
548 fprintf (mout, "const char *emodule_title = \"%s\";\n", SSTR(mod_title));
|
|
|
549 fprintf (mout, "\n\n");
|
|
|
550 fprintf (mout, "void docs_of_%s()\n", SSTR(mod_name));
|
|
|
551 fclose (mout);
|
|
|
552
|
|
|
553 sprintf (ts, "%s/make-docfile", ELLCC_ARCHDIR);
|
|
|
554 OVERENV(mdocprog, "ELLMAKEDOC", ts);
|
|
|
555 add_to_argv (mdocprog);
|
|
|
556 sprintf (ts, "-E %s", mod_output);
|
|
|
557 add_to_argv (ts);
|
|
|
558 for (i = 1; i < exec_argc; i++)
|
|
|
559 exec_argv[real_argc++] = strdup (prog_argv[exec_args[i]]);
|
|
|
560 }
|
|
|
561
|
|
|
562 #endif /* HAVE_SHLIB */
|
|
|
563
|
