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[hkl] updated ccan
[hkl.git] / hkl / ccan / configurator.c
blob52c0243b4b99c7cdc6eaace528463d344743ef43
1 /* Simple tool to create config.h.
2 * Would be much easier with ccan modules, but deliberately standalone.
3 *
4 * Copyright 2011 Rusty Russell <rusty@rustcorp.com.au>. MIT license.
5 *
6 * c12r_err, c12r_errx functions copied from ccan/err/err.c
7 * Copyright Rusty Russell <rusty@rustcorp.com.au>. CC0 (Public domain) License.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 */
27 #define _POSIX_C_SOURCE 200809L /* For pclose, popen, strdup */
28
29 #include <errno.h>
30 #include <stdio.h>
31 #include <stdarg.h>
32 #include <stdbool.h>
33 #include <stdlib.h>
34 #include <string.h>
35
36 #ifdef _MSC_VER
37 #define popen _popen
38 #define pclose _pclose
39 #endif
40
41 #ifdef _MSC_VER
42 #define DEFAULT_COMPILER "cl"
43 /* Note: Dash options avoid POSIX path conversion when used under msys bash
44 * and are therefore preferred to slash (e.g. -nologo over /nologo)
45 * Note: Disable Warning 4200 "nonstandard extension used : zero-sized array
46 * in struct/union" for flexible array members.
47 */
48 #define DEFAULT_FLAGS "-nologo -Zi -W4 -wd4200 " \
49 "-D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS"
50 #define DEFAULT_OUTPUT_EXE_FLAG "-Fe:"
51 #else
52 #define DEFAULT_COMPILER "cc"
53 #define DEFAULT_FLAGS "-g3 -ggdb -Wall -Wundef -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes -Wold-style-definition"
54 #define DEFAULT_OUTPUT_EXE_FLAG "-o"
55 #endif
56
57 #define OUTPUT_FILE "configurator.out"
58 #define INPUT_FILE "configuratortest.c"
59
60 #ifdef _WIN32
61 #define DIR_SEP "\\"
62 #else
63 #define DIR_SEP "/"
64 #endif
65
66 static const char *progname = "";
67 static int verbose;
68
69 enum test_style {
70 OUTSIDE_MAIN = 0x1,
71 DEFINES_FUNC = 0x2,
72 INSIDE_MAIN = 0x4,
73 DEFINES_EVERYTHING = 0x8,
74 MAY_NOT_COMPILE = 0x10,
75 EXECUTE = 0x8000
76 };
77
78 struct test {
79 const char *name;
80 enum test_style style;
81 const char *depends;
82 const char *link;
83 const char *fragment;
84 const char *flags;
85 const char *overrides; /* On success, force this to '1' */
86 bool done;
87 bool answer;
88 };
89
90 static struct test tests[] = {
91 { "HAVE_32BIT_OFF_T", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
92 "#include <sys/types.h>\n"
93 "int main(void) {\n"
94 " return sizeof(off_t) == 4 ? 0 : 1;\n"
95 "}\n" },
96 { "HAVE_ALIGNOF", INSIDE_MAIN, NULL, NULL,
97 "return __alignof__(double) > 0 ? 0 : 1;" },
98 { "HAVE_ASPRINTF", DEFINES_FUNC, NULL, NULL,
99 "#ifndef _GNU_SOURCE\n"
100 "#define _GNU_SOURCE\n"
101 "#endif\n"
102 "#include <stdio.h>\n"
103 "static char *func(int x) {"
104 " char *p;\n"
105 " if (asprintf(&p, \"%u\", x) == -1) p = NULL;"
106 " return p;\n"
107 "}" },
108 { "HAVE_ATTRIBUTE_COLD", DEFINES_FUNC, NULL, NULL,
109 "static int __attribute__((cold)) func(int x) { return x; }" },
110 { "HAVE_ATTRIBUTE_CONST", DEFINES_FUNC, NULL, NULL,
111 "static int __attribute__((const)) func(int x) { return x; }" },
112 { "HAVE_ATTRIBUTE_PURE", DEFINES_FUNC, NULL, NULL,
113 "static int __attribute__((pure)) func(int x) { return x; }" },
114 { "HAVE_ATTRIBUTE_MAY_ALIAS", OUTSIDE_MAIN, NULL, NULL,
115 "typedef short __attribute__((__may_alias__)) short_a;" },
116 { "HAVE_ATTRIBUTE_NORETURN", DEFINES_FUNC, NULL, NULL,
117 "#include <stdlib.h>\n"
118 "static void __attribute__((noreturn)) func(int x) { exit(x); }" },
119 { "HAVE_ATTRIBUTE_PRINTF", DEFINES_FUNC, NULL, NULL,
120 "static void __attribute__((format(__printf__, 1, 2))) func(const char *fmt, ...) { (void)fmt; }" },
121 { "HAVE_ATTRIBUTE_UNUSED", OUTSIDE_MAIN, NULL, NULL,
122 "static int __attribute__((unused)) func(int x) { return x; }" },
123 { "HAVE_ATTRIBUTE_USED", OUTSIDE_MAIN, NULL, NULL,
124 "static int __attribute__((used)) func(int x) { return x; }" },
125 { "HAVE_BACKTRACE", DEFINES_FUNC, NULL, NULL,
126 "#include <execinfo.h>\n"
127 "static int func(int x) {"
128 " void *bt[10];\n"
129 " return backtrace(bt, 10) < x;\n"
130 "}" },
131 { "HAVE_BIG_ENDIAN", INSIDE_MAIN|EXECUTE, NULL, NULL,
132 "union { int i; char c[sizeof(int)]; } u;\n"
133 "u.i = 0x01020304;\n"
134 "return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;" },
135 { "HAVE_BSWAP_64", DEFINES_FUNC, "HAVE_BYTESWAP_H", NULL,
136 "#include <byteswap.h>\n"
137 "static int func(int x) { return bswap_64(x); }" },
138 { "HAVE_BUILTIN_CHOOSE_EXPR", INSIDE_MAIN, NULL, NULL,
139 "return __builtin_choose_expr(1, 0, \"garbage\");" },
140 { "HAVE_BUILTIN_CLZ", INSIDE_MAIN, NULL, NULL,
141 "return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1;" },
142 { "HAVE_BUILTIN_CLZL", INSIDE_MAIN, NULL, NULL,
143 "return __builtin_clzl(1) == (sizeof(long)*8 - 1) ? 0 : 1;" },
144 { "HAVE_BUILTIN_CLZLL", INSIDE_MAIN, NULL, NULL,
145 "return __builtin_clzll(1) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
146 { "HAVE_BUILTIN_CTZ", INSIDE_MAIN, NULL, NULL,
147 "return __builtin_ctz(1 << (sizeof(int)*8 - 1)) == (sizeof(int)*8 - 1) ? 0 : 1;" },
148 { "HAVE_BUILTIN_CTZL", INSIDE_MAIN, NULL, NULL,
149 "return __builtin_ctzl(1UL << (sizeof(long)*8 - 1)) == (sizeof(long)*8 - 1) ? 0 : 1;" },
150 { "HAVE_BUILTIN_CTZLL", INSIDE_MAIN, NULL, NULL,
151 "return __builtin_ctzll(1ULL << (sizeof(long long)*8 - 1)) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
152 { "HAVE_BUILTIN_CONSTANT_P", INSIDE_MAIN, NULL, NULL,
153 "return __builtin_constant_p(1) ? 0 : 1;" },
154 { "HAVE_BUILTIN_EXPECT", INSIDE_MAIN, NULL, NULL,
155 "return __builtin_expect(argc == 1, 1) ? 0 : 1;" },
156 { "HAVE_BUILTIN_FFS", INSIDE_MAIN, NULL, NULL,
157 "return __builtin_ffs(0) == 0 ? 0 : 1;" },
158 { "HAVE_BUILTIN_FFSL", INSIDE_MAIN, NULL, NULL,
159 "return __builtin_ffsl(0L) == 0 ? 0 : 1;" },
160 { "HAVE_BUILTIN_FFSLL", INSIDE_MAIN, NULL, NULL,
161 "return __builtin_ffsll(0LL) == 0 ? 0 : 1;" },
162 { "HAVE_BUILTIN_POPCOUNTL", INSIDE_MAIN, NULL, NULL,
163 "return __builtin_popcountl(255L) == 8 ? 0 : 1;" },
164 { "HAVE_BUILTIN_TYPES_COMPATIBLE_P", INSIDE_MAIN, NULL, NULL,
165 "return __builtin_types_compatible_p(char *, int) ? 1 : 0;" },
166 { "HAVE_ICCARM_INTRINSICS", DEFINES_FUNC, NULL, NULL,
167 "#include <intrinsics.h>\n"
168 "int func(int v) {\n"
169 " return __CLZ(__RBIT(v));\n"
170 "}" },
171 { "HAVE_BYTESWAP_H", OUTSIDE_MAIN, NULL, NULL,
172 "#include <byteswap.h>\n" },
173 { "HAVE_CLOCK_GETTIME",
174 DEFINES_FUNC, "HAVE_STRUCT_TIMESPEC", NULL,
175 "#include <time.h>\n"
176 "static struct timespec func(void) {\n"
177 " struct timespec ts;\n"
178 " clock_gettime(CLOCK_REALTIME, &ts);\n"
179 " return ts;\n"
180 "}\n" },
181 { "HAVE_CLOCK_GETTIME_IN_LIBRT",
182 DEFINES_FUNC,
183 "HAVE_STRUCT_TIMESPEC !HAVE_CLOCK_GETTIME",
184 "-lrt",
185 "#include <time.h>\n"
186 "static struct timespec func(void) {\n"
187 " struct timespec ts;\n"
188 " clock_gettime(CLOCK_REALTIME, &ts);\n"
189 " return ts;\n"
190 "}\n",
191 /* This means HAVE_CLOCK_GETTIME, too */
192 "HAVE_CLOCK_GETTIME" },
193 { "HAVE_COMPOUND_LITERALS", INSIDE_MAIN, NULL, NULL,
194 "int *foo = (int[]) { 1, 2, 3, 4 };\n"
195 "return foo[0] ? 0 : 1;" },
196 { "HAVE_FCHDIR", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
197 "#include <sys/types.h>\n"
198 "#include <sys/stat.h>\n"
199 "#include <fcntl.h>\n"
200 "#include <unistd.h>\n"
201 "int main(void) {\n"
202 " int fd = open(\"..\", O_RDONLY);\n"
203 " return fchdir(fd) == 0 ? 0 : 1;\n"
204 "}\n" },
205 { "HAVE_ERR_H", DEFINES_FUNC, NULL, NULL,
206 "#include <err.h>\n"
207 "static void func(int arg) {\n"
208 " if (arg == 0)\n"
209 " err(1, \"err %u\", arg);\n"
210 " if (arg == 1)\n"
211 " errx(1, \"err %u\", arg);\n"
212 " if (arg == 3)\n"
213 " warn(\"warn %u\", arg);\n"
214 " if (arg == 4)\n"
215 " warnx(\"warn %u\", arg);\n"
216 "}\n" },
217 { "HAVE_FILE_OFFSET_BITS", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE,
218 "HAVE_32BIT_OFF_T", NULL,
219 "#define _FILE_OFFSET_BITS 64\n"
220 "#include <sys/types.h>\n"
221 "int main(void) {\n"
222 " return sizeof(off_t) == 8 ? 0 : 1;\n"
223 "}\n" },
224 { "HAVE_FOR_LOOP_DECLARATION", INSIDE_MAIN, NULL, NULL,
225 "int ret = 1;\n"
226 "for (int i = 0; i < argc; i++) { ret = 0; };\n"
227 "return ret;" },
228 { "HAVE_FLEXIBLE_ARRAY_MEMBER", OUTSIDE_MAIN, NULL, NULL,
229 "struct foo { unsigned int x; int arr[]; };" },
230 { "HAVE_GETPAGESIZE", DEFINES_FUNC, NULL, NULL,
231 "#include <unistd.h>\n"
232 "static int func(void) { return getpagesize(); }" },
233 { "HAVE_ISBLANK", DEFINES_FUNC, NULL, NULL,
234 "#ifndef _GNU_SOURCE\n"
235 "#define _GNU_SOURCE\n"
236 "#endif\n"
237 "#include <ctype.h>\n"
238 "static int func(void) { return isblank(' '); }" },
239 { "HAVE_LITTLE_ENDIAN", INSIDE_MAIN|EXECUTE, NULL, NULL,
240 "union { int i; char c[sizeof(int)]; } u;\n"
241 "u.i = 0x01020304;\n"
242 "return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;" },
243 { "HAVE_MEMMEM", DEFINES_FUNC, NULL, NULL,
244 "#ifndef _GNU_SOURCE\n"
245 "#define _GNU_SOURCE\n"
246 "#endif\n"
247 "#include <string.h>\n"
248 "static void *func(void *h, size_t hl, void *n, size_t nl) {\n"
249 "return memmem(h, hl, n, nl);"
250 "}\n", },
251 { "HAVE_MEMRCHR", DEFINES_FUNC, NULL, NULL,
252 "#ifndef _GNU_SOURCE\n"
253 "#define _GNU_SOURCE\n"
254 "#endif\n"
255 "#include <string.h>\n"
256 "static void *func(void *s, int c, size_t n) {\n"
257 "return memrchr(s, c, n);"
258 "}\n", },
259 { "HAVE_MMAP", DEFINES_FUNC, NULL, NULL,
260 "#include <sys/mman.h>\n"
261 "static void *func(int fd) {\n"
262 " return mmap(0, 65536, PROT_READ, MAP_SHARED, fd, 0);\n"
263 "}" },
264 { "HAVE_PROC_SELF_MAPS", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
265 "#include <sys/types.h>\n"
266 "#include <sys/stat.h>\n"
267 "#include <fcntl.h>\n"
268 "int main(void) {\n"
269 " return open(\"/proc/self/maps\", O_RDONLY) != -1 ? 0 : 1;\n"
270 "}\n" },
271 { "HAVE_QSORT_R_PRIVATE_LAST",
272 DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
273 "#ifndef _GNU_SOURCE\n"
274 "#define _GNU_SOURCE\n"
275 "#endif\n"
276 "#include <stdlib.h>\n"
277 "static int cmp(const void *lp, const void *rp, void *priv) {\n"
278 " *(unsigned int *)priv = 1;\n"
279 " return *(const int *)lp - *(const int *)rp; }\n"
280 "int main(void) {\n"
281 " int array[] = { 9, 2, 5 };\n"
282 " unsigned int called = 0;\n"
283 " qsort_r(array, 3, sizeof(int), cmp, &called);\n"
284 " return called && array[0] == 2 && array[1] == 5 && array[2] == 9 ? 0 : 1;\n"
285 "}\n" },
286 { "HAVE_STRUCT_TIMESPEC",
287 DEFINES_FUNC, NULL, NULL,
288 "#include <time.h>\n"
289 "static void func(void) {\n"
290 " struct timespec ts;\n"
291 " ts.tv_sec = ts.tv_nsec = 1;\n"
292 "}\n" },
293 { "HAVE_SECTION_START_STOP",
294 DEFINES_FUNC, NULL, NULL,
295 "static void *__attribute__((__section__(\"mysec\"))) p = &p;\n"
296 "static int func(void) {\n"
297 " extern void *__start_mysec[], *__stop_mysec[];\n"
298 " return __stop_mysec - __start_mysec;\n"
299 "}\n" },
300 { "HAVE_STACK_GROWS_UPWARDS", DEFINES_EVERYTHING|EXECUTE, NULL, NULL,
301 "#include <stddef.h>\n"
302 "static ptrdiff_t nest(const void *base, unsigned int i)\n"
303 "{\n"
304 " if (i == 0)\n"
305 " return (const char *)&i - (const char *)base;\n"
306 " return nest(base, i-1);\n"
307 "}\n"
308 "int main(int argc, char *argv[]) {\n"
309 " (void)argv;\n"
310 " return (nest(&argc, argc) > 0) ? 0 : 1;\n"
311 "}\n" },
312 { "HAVE_STATEMENT_EXPR", INSIDE_MAIN, NULL, NULL,
313 "return ({ int x = argc; x == argc ? 0 : 1; });" },
314 { "HAVE_SYS_FILIO_H", OUTSIDE_MAIN, NULL, NULL, /* Solaris needs this for FIONREAD */
315 "#include <sys/filio.h>\n" },
316 { "HAVE_SYS_TERMIOS_H", OUTSIDE_MAIN, NULL, NULL,
317 "#include <sys/termios.h>\n" },
318 { "HAVE_SYS_UNISTD_H", OUTSIDE_MAIN, NULL, NULL,
319 "#include <sys/unistd.h>\n" },
320 { "HAVE_TYPEOF", INSIDE_MAIN, NULL, NULL,
321 "__typeof__(argc) i; i = argc; return i == argc ? 0 : 1;" },
322 { "HAVE_UNALIGNED_ACCESS", DEFINES_EVERYTHING|EXECUTE, NULL, NULL,
323 "#include <string.h>\n"
324 "int main(int argc, char *argv[]) {\n"
325 " (void)argc;\n"
326 " char pad[sizeof(int *) * 1];\n"
327 " strncpy(pad, argv[0], sizeof(pad));\n"
328 " int *x = (int *)pad, *y = (int *)(pad + 1);\n"
329 " return *x == *y;\n"
330 "}\n" },
331 { "HAVE_UTIME", DEFINES_FUNC, NULL, NULL,
332 "#include <sys/types.h>\n"
333 "#include <utime.h>\n"
334 "static int func(const char *filename) {\n"
335 " struct utimbuf times = { 0 };\n"
336 " return utime(filename, &times);\n"
337 "}" },
338 { "HAVE_WARN_UNUSED_RESULT", DEFINES_FUNC, NULL, NULL,
339 "#include <sys/types.h>\n"
340 "#include <utime.h>\n"
341 "static __attribute__((warn_unused_result)) int func(int i) {\n"
342 " return i + 1;\n"
343 "}" },
344 { "HAVE_OPENMP", INSIDE_MAIN, NULL, NULL,
345 "int i;\n"
346 "#pragma omp parallel for\n"
347 "for(i = 0; i < 0; i++) {};\n"
348 "return 0;\n",
349 "-Werror -fopenmp" },
350 { "HAVE_VALGRIND_MEMCHECK_H", OUTSIDE_MAIN, NULL, NULL,
351 "#include <valgrind/memcheck.h>\n" },
352 { "HAVE_UCONTEXT", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE,
353 NULL, NULL,
354 "#include <ucontext.h>\n"
355 "static int x = 0;\n"
356 "static char stack[2048];\n"
357 "static ucontext_t a, b;\n"
358 "static void fn(void) {\n"
359 " x |= 2;\n"
360 " setcontext(&b);\n"
361 " x |= 4;\n"
362 "}\n"
363 "int main(void) {\n"
364 " x |= 1;\n"
365 " getcontext(&a);\n"
366 " a.uc_stack.ss_sp = stack;\n"
367 " a.uc_stack.ss_size = sizeof(stack);\n"
368 " makecontext(&a, fn, 0);\n"
369 " swapcontext(&b, &a);\n"
370 " return (x == 3) ? 0 : 1;\n"
371 "}\n"
372 },
373 { "HAVE_POINTER_SAFE_MAKECONTEXT", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE,
374 "HAVE_UCONTEXT", NULL,
375 "#include <stddef.h>\n"
376 "#include <ucontext.h>\n"
377 "static int worked = 0;\n"
378 "static char stack[1024];\n"
379 "static ucontext_t a, b;\n"
380 "static void fn(void *p, void *q) {\n"
381 " void *cp = &worked;\n"
382 " void *cq = (void *)(~((ptrdiff_t)cp));\n"
383 " if ((p == cp) && (q == cq))\n"
384 " worked = 1;\n"
385 " setcontext(&b);\n"
386 "}\n"
387 "int main(void) {\n"
388 " void *ap = &worked;\n"
389 " void *aq = (void *)(~((ptrdiff_t)ap));\n"
390 " getcontext(&a);\n"
391 " a.uc_stack.ss_sp = stack;\n"
392 " a.uc_stack.ss_size = sizeof(stack);\n"
393 " makecontext(&a, (void (*)(void))fn, 2, ap, aq);\n"
394 " swapcontext(&b, &a);\n"
395 " return worked ? 0 : 1;\n"
396 "}\n"
397 },
398 };
399
400 static void c12r_err(int eval, const char *fmt, ...)
401 {
402 int err_errno = errno;
403 va_list ap;
404
405 fprintf(stderr, "%s: ", progname);
406 va_start(ap, fmt);
407 vfprintf(stderr, fmt, ap);
408 va_end(ap);
409 fprintf(stderr, ": %s\n", strerror(err_errno));
410 exit(eval);
411 }
412
413 static void c12r_errx(int eval, const char *fmt, ...)
414 {
415 va_list ap;
416
417 fprintf(stderr, "%s: ", progname);
418 va_start(ap, fmt);
419 vfprintf(stderr, fmt, ap);
420 va_end(ap);
421 fprintf(stderr, "\n");
422 exit(eval);
423 }
424
425 static size_t fcopy(FILE *fsrc, FILE *fdst)
426 {
427 char buffer[BUFSIZ];
428 size_t rsize, wsize;
429 size_t copied = 0;
430
431 while ((rsize = fread(buffer, 1, BUFSIZ, fsrc)) > 0) {
432 wsize = fwrite(buffer, 1, rsize, fdst);
433 copied += wsize;
434 if (wsize != rsize)
435 break;
436 }
437
438 return copied;
439 }
440
441 static char *grab_stream(FILE *file)
442 {
443 size_t max, ret, size = 0;
444 char *buffer;
445
446 max = BUFSIZ;
447 buffer = malloc(max);
448 while ((ret = fread(buffer+size, 1, max - size, file)) == max - size) {
449 size += ret;
450 buffer = realloc(buffer, max *= 2);
451 }
452 size += ret;
453 if (ferror(file))
454 c12r_err(1, "reading from command");
455 buffer[size] = '\0';
456 return buffer;
457 }
458
459 static char *run(const char *cmd, int *exitstatus)
460 {
461 static const char redir[] = " 2>&1";
462 size_t cmdlen;
463 char *cmdredir;
464 FILE *cmdout;
465 char *ret;
466
467 cmdlen = strlen(cmd);
468 cmdredir = malloc(cmdlen + sizeof(redir));
469 memcpy(cmdredir, cmd, cmdlen);
470 memcpy(cmdredir + cmdlen, redir, sizeof(redir));
471
472 cmdout = popen(cmdredir, "r");
473 if (!cmdout)
474 c12r_err(1, "popen \"%s\"", cmdredir);
475
476 free(cmdredir);
477
478 ret = grab_stream(cmdout);
479 *exitstatus = pclose(cmdout);
480 return ret;
481 }
482
483 static char *connect_args(const char *argv[], const char *outflag,
484 const char *files)
485 {
486 unsigned int i;
487 char *ret;
488 size_t len = strlen(outflag) + strlen(files) + 1;
489
490 for (i = 1; argv[i]; i++)
491 len += 1 + strlen(argv[i]);
492
493 ret = malloc(len);
494 len = 0;
495 for (i = 1; argv[i]; i++) {
496 strcpy(ret + len, argv[i]);
497 len += strlen(argv[i]);
498 if (argv[i+1] || *outflag)
499 ret[len++] = ' ';
500 }
501 strcpy(ret + len, outflag);
502 len += strlen(outflag);
503 strcpy(ret + len, files);
504 return ret;
505 }
506
507 static struct test *find_test(const char *name)
508 {
509 unsigned int i;
510
511 for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++) {
512 if (strcmp(tests[i].name, name) == 0)
513 return &tests[i];
514 }
515 abort();
516 }
517
518 #define PRE_BOILERPLATE "/* Test program generated by configurator. */\n"
519 #define MAIN_START_BOILERPLATE \
520 "int main(int argc, char *argv[]) {\n" \
521 " (void)argc;\n" \
522 " (void)argv;\n"
523 #define USE_FUNC_BOILERPLATE "(void)func;\n"
524 #define MAIN_BODY_BOILERPLATE "return 0;\n"
525 #define MAIN_END_BOILERPLATE "}\n"
526
527 static bool run_test(const char *cmd, struct test *test)
528 {
529 char *output, *newcmd;
530 FILE *outf;
531 int status;
532
533 if (test->done)
534 return test->answer;
535
536 if (test->depends) {
537 size_t len;
538 const char *deps = test->depends;
539 char *dep;
540
541 /* Space-separated dependencies, could be ! for inverse. */
542 while ((len = strcspn(deps, " ")) != 0) {
543 bool positive = true;
544 if (deps[len]) {
545 dep = strdup(deps);
546 dep[len] = '\0';
547 } else {
548 dep = (char *)deps;
549 }
550
551 if (dep[0] == '!') {
552 dep++;
553 positive = false;
554 }
555 if (run_test(cmd, find_test(dep)) != positive) {
556 test->answer = false;
557 test->done = true;
558 return test->answer;
559 }
560 if (deps[len])
561 free(dep);
562
563 deps += len;
564 deps += strspn(deps, " ");
565 }
566 }
567
568 outf = fopen(INPUT_FILE, verbose > 1 ? "w+" : "w");
569 if (!outf)
570 c12r_err(1, "creating %s", INPUT_FILE);
571
572 fprintf(outf, "%s", PRE_BOILERPLATE);
573 switch (test->style & ~(EXECUTE|MAY_NOT_COMPILE)) {
574 case INSIDE_MAIN:
575 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
576 fprintf(outf, "%s", test->fragment);
577 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
578 break;
579 case OUTSIDE_MAIN:
580 fprintf(outf, "%s", test->fragment);
581 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
582 fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
583 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
584 break;
585 case DEFINES_FUNC:
586 fprintf(outf, "%s", test->fragment);
587 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
588 fprintf(outf, "%s", USE_FUNC_BOILERPLATE);
589 fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
590 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
591 break;
592 case DEFINES_EVERYTHING:
593 fprintf(outf, "%s", test->fragment);
594 break;
595 default:
596 abort();
597
598 }
599
600 if (verbose > 1) {
601 fseek(outf, 0, SEEK_SET);
602 fcopy(outf, stdout);
603 }
604
605 fclose(outf);
606
607 newcmd = strdup(cmd);
608
609 if (test->flags) {
610 newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
611 + strlen(test->flags) + 1);
612 strcat(newcmd, " ");
613 strcat(newcmd, test->flags);
614 if (verbose > 1)
615 printf("Extra flags line: %s", newcmd);
616 }
617
618 if (test->link) {
619 newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
620 + strlen(test->link) + 1);
621 strcat(newcmd, " ");
622 strcat(newcmd, test->link);
623 if (verbose > 1)
624 printf("Extra link line: %s", newcmd);
625 }
626
627 output = run(newcmd, &status);
628
629 free(newcmd);
630
631 if (status != 0 || strstr(output, "warning")) {
632 if (verbose)
633 printf("Compile %s for %s, status %i: %s\n",
634 status ? "fail" : "warning",
635 test->name, status, output);
636 if ((test->style & EXECUTE) && !(test->style & MAY_NOT_COMPILE))
637 c12r_errx(1, "Test for %s did not compile:\n%s",
638 test->name, output);
639 test->answer = false;
640 free(output);
641 } else {
642 /* Compile succeeded. */
643 free(output);
644 /* We run INSIDE_MAIN tests for sanity checking. */
645 if ((test->style & EXECUTE) || (test->style & INSIDE_MAIN)) {
646 output = run("." DIR_SEP OUTPUT_FILE, &status);
647 if (!(test->style & EXECUTE) && status != 0)
648 c12r_errx(1, "Test for %s failed with %i:\n%s",
649 test->name, status, output);
650 if (verbose && status)
651 printf("%s exited %i\n", test->name, status);
652 free(output);
653 }
654 test->answer = (status == 0);
655 }
656 test->done = true;
657
658 if (test->answer && test->overrides) {
659 struct test *override = find_test(test->overrides);
660 override->done = true;
661 override->answer = true;
662 }
663 return test->answer;
664 }
665
666 int main(int argc, const char *argv[])
667 {
668 char *cmd;
669 unsigned int i;
670 const char *default_args[]
671 = { "", DEFAULT_COMPILER, DEFAULT_FLAGS, NULL };
672 const char *outflag = DEFAULT_OUTPUT_EXE_FLAG;
673
674 if (argc > 0)
675 progname = argv[0];
676
677 while (argc > 1) {
678 if (strcmp(argv[1], "--help") == 0) {
679 printf("Usage: configurator [-v] [-O<outflag>] [<compiler> <flags>...]\n"
680 " <compiler> <flags> will have \"<outflag> <outfile> <infile.c>\" appended\n"
681 "Default: %s %s %s\n",
682 DEFAULT_COMPILER, DEFAULT_FLAGS,
683 DEFAULT_OUTPUT_EXE_FLAG);
684 exit(0);
685 }
686 if (strncmp(argv[1], "-O", 2) == 0) {
687 argc--;
688 argv++;
689 outflag = argv[1] + 2;
690 if (!*outflag) {
691 fprintf(stderr,
692 "%s: option requires an argument -- O\n",
693 argv[0]);
694 exit(1);
695 }
696 } else if (strcmp(argv[1], "-v") == 0) {
697 argc--;
698 argv++;
699 verbose++;
700 } else if (strcmp(argv[1], "-vv") == 0) {
701 argc--;
702 argv++;
703 verbose += 2;
704 } else {
705 break;
706 }
707 }
708
709 if (argc == 1)
710 argv = default_args;
711
712 cmd = connect_args(argv, outflag, OUTPUT_FILE " " INPUT_FILE);
713 for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++)
714 run_test(cmd, &tests[i]);
715 free(cmd);
716
717 remove(OUTPUT_FILE);
718 remove(INPUT_FILE);
719
720 printf("/* Generated by CCAN configurator */\n"
721 "#ifndef CCAN_CONFIG_H\n"
722 "#define CCAN_CONFIG_H\n");
723 printf("#ifndef _GNU_SOURCE\n");
724 printf("#define _GNU_SOURCE /* Always use GNU extensions. */\n");
725 printf("#endif\n");
726 printf("#define CCAN_COMPILER \"%s\"\n", argv[1]);
727 cmd = connect_args(argv + 1, "", "");
728 printf("#define CCAN_CFLAGS \"%s\"\n", cmd);
729 free(cmd);
730 printf("#define CCAN_OUTPUT_EXE_CFLAG \"%s\"\n\n", outflag);
731 /* This one implies "#include <ccan/..." works, eg. for tdb2.h */
732 printf("#define HAVE_CCAN 1\n");
733 for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++)
734 printf("#define %s %u\n", tests[i].name, tests[i].answer);
735 printf("#endif /* CCAN_CONFIG_H */\n");
736 return 0;
737 }
Diffractometer computation library