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authorRoman Zippel <zippel@linux-m68k.org>2006-06-09 01:12:42 -0400
committerSam Ravnborg <sam@mars.ravnborg.org>2006-06-09 01:31:30 -0400
commit2e3646e51b2d6415549b310655df63e7e0d7a080 (patch)
treef717c0ede91122ab776a6b0fce9b8c941797f170 /scripts/basic
parent669bfad906522e74ee8d962801552a8c224c0d63 (diff)
kconfig: integrate split config into silentoldconfig
Now that kconfig can load multiple configurations, it becomes simple to integrate the split config step, by simply comparing the new .config file with the old auto.conf (and then saving the new auto.conf). A nice side effect is that this saves a bit of disk space and cache, as no data needs to be read from or saved into the splitted config files anymore (e.g. include/config is now 648KB instead of 5.2MB). Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'scripts/basic')
-rw-r--r--scripts/basic/Makefile6
-rw-r--r--scripts/basic/split-include.c226
2 files changed, 2 insertions, 230 deletions
diff --git a/scripts/basic/Makefile b/scripts/basic/Makefile
index f22e94c3a2d1..2f60070f9733 100644
--- a/scripts/basic/Makefile
+++ b/scripts/basic/Makefile
@@ -1,17 +1,15 @@
1### 1###
2# Makefile.basic list the most basic programs used during the build process. 2# Makefile.basic list the most basic programs used during the build process.
3# The programs listed herein is what is needed to do the basic stuff, 3# The programs listed herein is what is needed to do the basic stuff,
4# such as splitting .config and fix dependency file. 4# such as fix dependency file.
5# This initial step is needed to avoid files to be recompiled 5# This initial step is needed to avoid files to be recompiled
6# when kernel configuration changes (which is what happens when 6# when kernel configuration changes (which is what happens when
7# .config is included by main Makefile. 7# .config is included by main Makefile.
8# --------------------------------------------------------------------------- 8# ---------------------------------------------------------------------------
9# fixdep: Used to generate dependency information during build process 9# fixdep: Used to generate dependency information during build process
10# split-include: Divide all config symbols up in a number of files in
11# include/config/...
12# docproc: Used in Documentation/docbook 10# docproc: Used in Documentation/docbook
13 11
14hostprogs-y := fixdep split-include docproc 12hostprogs-y := fixdep docproc
15always := $(hostprogs-y) 13always := $(hostprogs-y)
16 14
17# fixdep is needed to compile other host programs 15# fixdep is needed to compile other host programs
diff --git a/scripts/basic/split-include.c b/scripts/basic/split-include.c
deleted file mode 100644
index 459c45276cb1..000000000000
--- a/scripts/basic/split-include.c
+++ /dev/null
@@ -1,226 +0,0 @@
1/*
2 * split-include.c
3 *
4 * Copyright abandoned, Michael Chastain, <mailto:mec@shout.net>.
5 * This is a C version of syncdep.pl by Werner Almesberger.
6 *
7 * This program takes autoconf.h as input and outputs a directory full
8 * of one-line include files, merging onto the old values.
9 *
10 * Think of the configuration options as key-value pairs. Then there
11 * are five cases:
12 *
13 * key old value new value action
14 *
15 * KEY-1 VALUE-1 VALUE-1 leave file alone
16 * KEY-2 VALUE-2A VALUE-2B write VALUE-2B into file
17 * KEY-3 - VALUE-3 write VALUE-3 into file
18 * KEY-4 VALUE-4 - write an empty file
19 * KEY-5 (empty) - leave old empty file alone
20 */
21
22#include <sys/stat.h>
23#include <sys/types.h>
24
25#include <ctype.h>
26#include <errno.h>
27#include <fcntl.h>
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
31#include <unistd.h>
32
33#define ERROR_EXIT(strExit) \
34 { \
35 const int errnoSave = errno; \
36 fprintf(stderr, "%s: ", str_my_name); \
37 errno = errnoSave; \
38 perror((strExit)); \
39 exit(1); \
40 }
41
42
43
44int main(int argc, const char * argv [])
45{
46 const char * str_my_name;
47 const char * str_file_autoconf;
48 const char * str_dir_config;
49
50 FILE * fp_config;
51 FILE * fp_target;
52 FILE * fp_find;
53
54 int buffer_size;
55
56 char * line;
57 char * old_line;
58 char * list_target;
59 char * ptarget;
60
61 struct stat stat_buf;
62
63 /* Check arg count. */
64 if (argc != 3)
65 {
66 fprintf(stderr, "%s: wrong number of arguments.\n", argv[0]);
67 exit(1);
68 }
69
70 str_my_name = argv[0];
71 str_file_autoconf = argv[1];
72 str_dir_config = argv[2];
73
74 /* Find a buffer size. */
75 if (stat(str_file_autoconf, &stat_buf) != 0)
76 ERROR_EXIT(str_file_autoconf);
77 buffer_size = 2 * stat_buf.st_size + 4096;
78
79 /* Allocate buffers. */
80 if ( (line = malloc(buffer_size)) == NULL
81 || (old_line = malloc(buffer_size)) == NULL
82 || (list_target = malloc(buffer_size)) == NULL )
83 ERROR_EXIT(str_file_autoconf);
84
85 /* Open autoconfig file. */
86 if ((fp_config = fopen(str_file_autoconf, "r")) == NULL)
87 ERROR_EXIT(str_file_autoconf);
88
89 /* Make output directory if needed. */
90 if (stat(str_dir_config, &stat_buf) != 0)
91 {
92 if (mkdir(str_dir_config, 0755) != 0)
93 ERROR_EXIT(str_dir_config);
94 }
95
96 /* Change to output directory. */
97 if (chdir(str_dir_config) != 0)
98 ERROR_EXIT(str_dir_config);
99
100 /* Put initial separator into target list. */
101 ptarget = list_target;
102 *ptarget++ = '\n';
103
104 /* Read config lines. */
105 while (fgets(line, buffer_size, fp_config))
106 {
107 const char * str_config;
108 int is_same;
109 int itarget;
110
111 if (line[0] != '#')
112 continue;
113 if ((str_config = strstr(line, "CONFIG_")) == NULL)
114 continue;
115
116 /* Make the output file name. */
117 str_config += sizeof("CONFIG_") - 1;
118 for (itarget = 0; !isspace(str_config[itarget]); itarget++)
119 {
120 int c = (unsigned char) str_config[itarget];
121 if (isupper(c)) c = tolower(c);
122 if (c == '_') c = '/';
123 ptarget[itarget] = c;
124 }
125 ptarget[itarget++] = '.';
126 ptarget[itarget++] = 'h';
127 ptarget[itarget++] = '\0';
128
129 /* Check for existing file. */
130 is_same = 0;
131 if ((fp_target = fopen(ptarget, "r")) != NULL)
132 {
133 fgets(old_line, buffer_size, fp_target);
134 if (fclose(fp_target) != 0)
135 ERROR_EXIT(ptarget);
136 if (!strcmp(line, old_line))
137 is_same = 1;
138 }
139
140 if (!is_same)
141 {
142 /* Auto-create directories. */
143 int islash;
144 for (islash = 0; islash < itarget; islash++)
145 {
146 if (ptarget[islash] == '/')
147 {
148 ptarget[islash] = '\0';
149 if (stat(ptarget, &stat_buf) != 0
150 && mkdir(ptarget, 0755) != 0)
151 ERROR_EXIT( ptarget );
152 ptarget[islash] = '/';
153 }
154 }
155
156 /* Write the file. */
157 if ((fp_target = fopen(ptarget, "w" )) == NULL)
158 ERROR_EXIT(ptarget);
159 fputs(line, fp_target);
160 if (ferror(fp_target) || fclose(fp_target) != 0)
161 ERROR_EXIT(ptarget);
162 }
163
164 /* Update target list */
165 ptarget += itarget;
166 *(ptarget-1) = '\n';
167 }
168
169 /*
170 * Close autoconfig file.
171 * Terminate the target list.
172 */
173 if (fclose(fp_config) != 0)
174 ERROR_EXIT(str_file_autoconf);
175 *ptarget = '\0';
176
177 /*
178 * Fix up existing files which have no new value.
179 * This is Case 4 and Case 5.
180 *
181 * I re-read the tree and filter it against list_target.
182 * This is crude. But it avoids data copies. Also, list_target
183 * is compact and contiguous, so it easily fits into cache.
184 *
185 * Notice that list_target contains strings separated by \n,
186 * with a \n before the first string and after the last.
187 * fgets gives the incoming names a terminating \n.
188 * So by having an initial \n, strstr will find exact matches.
189 */
190
191 fp_find = popen("find * -type f -name \"*.h\" -print", "r");
192 if (fp_find == 0)
193 ERROR_EXIT( "find" );
194
195 line[0] = '\n';
196 while (fgets(line+1, buffer_size, fp_find))
197 {
198 if (strstr(list_target, line) == NULL)
199 {
200 /*
201 * This is an old file with no CONFIG_* flag in autoconf.h.
202 */
203
204 /* First strip the \n. */
205 line[strlen(line)-1] = '\0';
206
207 /* Grab size. */
208 if (stat(line+1, &stat_buf) != 0)
209 ERROR_EXIT(line);
210
211 /* If file is not empty, make it empty and give it a fresh date. */
212 if (stat_buf.st_size != 0)
213 {
214 if ((fp_target = fopen(line+1, "w")) == NULL)
215 ERROR_EXIT(line);
216 if (fclose(fp_target) != 0)
217 ERROR_EXIT(line);
218 }
219 }
220 }
221
222 if (pclose(fp_find) != 0)
223 ERROR_EXIT("find");
224
225 return 0;
226}
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