Roland Ver. 4.5 Technical Information PDF herunterladen (Seite 138)

128 GNU make

is executed, each of these stored ﬁle names are entered into the data base and marked as

having been updated and having the same update status as the ﬁle t.

When the recipe of a pattern rule is executed for t, the automatic variables are set

corresponding to the target and prerequisites. See Section 10.5.3 [Automatic Variables],

page 120.

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GNU Make 1
Short Contents 5
Table of Contents 7
1 Overview of make 11
2 An Introduction to Makeﬁles 13
2.2 A Simple Makeﬁle 14
2.6 Another Style of Makeﬁle 18
3 Writing Makeﬁles 21
3.1.1 Splitting Long Lines 22
3.3 Including Other Makeﬁles 23
3.4 The Variable MAKEFILES 24
3.5 How Makeﬁles Are Remade 24
3.7 How make Reads a Makeﬁle 26
Conditional Directives 27
Rule Deﬁnition 27
3.8 Secondary Expansion 28
4 Writing Rules 31
4.2 Types of Prerequisites 32
4.3.1 Wildcard Examples 33
4.3.3 The Function wildcard 34
4.4.2 The vpath Directive 36
4.5 Phony Targets 39
4.11 Static Pattern Rules 46
4.12 Double-Colon Rules 48
%.d: %.c 49
@set -e; rm -f $@; \ 49
5 Writing Recipes in Rules 51
5.2 Recipe Echoing 53
5.3 Recipe Execution 54
5.3.2 Choosing the Shell 55
5.4 Parallel Execution 57
5.5 Errors in Recipes 59
5.7 Recursive Use of make 60
5.8 Deﬁning Canned Recipes 66
5.9 Using Empty Recipes 67
6 How to Use Variables 69
6.3.1 Substitution References 72
6.3.2 Computed Variable Names 73
6.5 Setting Variables 75
6.7 The override Directive 78
6.9 Undeﬁning Variables 79
6.13 Suppressing Inheritance 82
6.14 Other Special Variables 83
7.1 Example of a Conditional 87
7.2 Syntax of Conditionals 88
8.1 Function Call Syntax 93
8.3 Functions for File Names 97
8.5 The foreach Function 100
8.6 The file Function 101
8.7 The call Function 102
8.8 The value Function 103
8.9 The eval Function 103
8.10 The origin Function 104
8.11 The flavor Function 105
8.14 The guile Function 107
8.13 The shell Function 107
9 How to Run make 109
9.5 Overriding Variables 113
9.7 Summary of Options 114
10 Using Implicit Rules 121
10.4 Chains of Implicit Rules 127
10.5.2 Pattern Rule Examples 129
10.5.3 Automatic Variables 130
10.5.4 How Patterns Match 132
10.7 Old-Fashioned Suﬃx Rules 135
12 Extending GNU make 143
12.2 Loading Dynamic Objects 145
12.2.1 The load Directive 146
Loaded Object Licensing 147
Data Structures 148
Registering Functions 148
Registered Function Interface 148
GNU make Facilities 148
Memory Management 149
12.2.4 Example Loaded Object 149
13 Features of GNU make 153
15 Makeﬁle Conventions 159
15.2 Utilities in Makeﬁles 160
CFLAGS = -g 161
ALL_CFLAGS = -I. $(CFLAGS) 161
Appendix A Quick Reference 175
Index of Concepts 201
192 GNU make 202
Index of Concepts 193 203
194 GNU make 204
Index of Concepts 195 205
196 GNU make 206
Index of Concepts 197 207
198 GNU make 208
200 GNU make 210

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