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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- V X L I N K . L I N K --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 2018, AdaCore --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 pragma Ada_2012;
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27
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28 with Ada.Command_Line; use Ada.Command_Line;
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29 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
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30
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31 package body VxLink.Link is
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32
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33 Gcc : constant String := VxLink.Gcc;
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34
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35 ----------------
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36 -- Initialize --
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37 ----------------
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38
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39 procedure Initialize
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40 (Linker : out VxLink_Linker)
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41 is
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42 Leading : Boolean := True;
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43 Next_Is_Object : Boolean := False;
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44
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45 begin
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46 for J in 1 .. Ada.Command_Line.Argument_Count loop
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47 declare
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48 Arg : String renames Argument (J);
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49 begin
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50 if Next_Is_Object then
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51 Next_Is_Object := False;
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52 Linker.Dest_Object := To_Unbounded_String (Arg);
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53 Leading := False;
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54
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55 elsif Argument (J) = "-o" then
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56 Next_Is_Object := True;
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57
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58 elsif Argument (J) = "-noauto-register" then
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59 -- Filter out this argument, and do not generate _ctors/_dtors
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60 Linker.Add_CDtors := False;
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61 elsif Arg = "-v" and then not Is_Verbose then
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62 -- first -v means VxLink should be verbose, two -v passes -v to
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63 -- the linker.
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64 Set_Verbose (True);
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65 else
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66 if Arg = "-nostdlib" or Arg = "-nostartfiles" then
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67 Linker.Add_CDtors := False;
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68 end if;
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69
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70 if Leading then
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71 Linker.Args_Leading.Append (Arg);
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72 else
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73 Linker.Args_Trailing.Append (Arg);
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74 end if;
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75 end if;
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76 end;
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77 end loop;
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78
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79 if Linker.Dest_Object = Null_Unbounded_String then
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80 Set_Error_State ("no output object is defined");
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81 elsif Linker.Add_CDtors then
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82 -- We'll need to create intermediate artefacts, so we'll use the
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83 -- destination object as base namespace just in case we have
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84 -- several link operations in the same directory
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85 declare
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86 Obj : constant String :=
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87 Base_Name (To_String (Linker.Dest_Object));
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88
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89 begin
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90 for J in reverse Obj'Range loop
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91 if Obj (J) = '.' then
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92 Linker.Dest_Base :=
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93 To_Unbounded_String (Obj (Obj'First .. J - 1));
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94 exit;
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95 end if;
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96 end loop;
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97
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98 Linker.Partial_Obj := Linker.Dest_Base & "-partial.o";
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99 end;
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100 end if;
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101 end Initialize;
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102
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103 -----------------
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104 -- Needs_CDtor --
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105 -----------------
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106
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107 function Needs_CDtor (Linker : VxLink_Linker) return Boolean is
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108 begin
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109 return Linker.Add_CDtors;
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110 end Needs_CDtor;
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111
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112 --------------------
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113 -- Partial_Object --
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114 --------------------
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115
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116 function Partial_Object (Linker : VxLink_Linker) return String is
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117 begin
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118 return To_String (Linker.Partial_Obj);
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119 end Partial_Object;
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120
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121 ---------------
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122 -- Namespace --
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123 ---------------
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124
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125 function Namespace (Linker : VxLink_Linker) return String is
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126 begin
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127 return To_String (Linker.Dest_Base);
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128 end Namespace;
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129
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130 ---------------------
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131 -- Do_Initial_Link --
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132 ---------------------
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133
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134 procedure Do_Initial_Link (Linker : VxLink_Linker)
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135 is
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136 Args : Arguments_List;
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137 Gxx_Path : constant String := Gxx;
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138 begin
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139 if Is_Error_State then
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140 return;
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141 end if;
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142
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143 if Gxx_Path'Length /= 0 then
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144 Args.Append (Gxx);
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145 else
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146 Args.Append (Gcc);
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147 end if;
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148 Args.Append (Linker.Args_Leading);
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149 Args.Append ("-o");
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150
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151 if Linker.Add_CDtors then
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152 Args.Append (To_String (Linker.Partial_Obj));
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153 else
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154 Args.Append (To_String (Linker.Dest_Object));
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155 end if;
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156
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157 Args.Append (Linker.Args_Trailing);
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158
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159 if not Linker.Add_CDtors then
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160 Args.Append ("-nostartfiles");
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161 end if;
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162
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163 Run (Args);
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164 end Do_Initial_Link;
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165
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166 -------------------
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167 -- Do_Final_Link --
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168 -------------------
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169
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170 procedure Do_Final_Link
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171 (Linker : VxLink_Linker;
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172 Ctdt_Obj : String)
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173 is
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174 Args : Arguments_List;
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175 begin
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176 if not Linker.Add_CDtors then
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177 return;
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178 end if;
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179
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180 if Is_Error_State then
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181 return;
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182 end if;
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183
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184 Args.Append (Gcc);
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185 Args.Append ("-nostdlib");
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186 Args.Append (Ctdt_Obj);
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187 Args.Append (To_String (Linker.Partial_Obj));
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188 Args.Append ("-o");
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189 Args.Append (To_String (Linker.Dest_Object));
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190
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191 Run (Args);
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192 end Do_Final_Link;
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193
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194 end VxLink.Link;
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