1 /* Simple tool to create config.h.
2 * Would be much easier with ccan modules, but deliberately standalone.
4 * Copyright 2011 Rusty Russell <rusty@rustcorp.com.au>. MIT license.
6 * c12r_err, c12r_errx functions copied from ccan/err/err.c
7 * Copyright Rusty Russell <rusty@rustcorp.com.au>. CC0 (Public domain) License.
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:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
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
27 #define _POSIX_C_SOURCE 200809L /* For pclose, popen, strdup */
29 #define EXIT_BAD_USAGE 1
30 #define EXIT_TROUBLE_RUNNING 2
31 #define EXIT_BAD_TEST 3
32 #define EXIT_BAD_INPUT 4
44 #define pclose _pclose
48 #define DEFAULT_COMPILER "cl"
49 /* Note: Dash options avoid POSIX path conversion when used under msys bash
50 * and are therefore preferred to slash (e.g. -nologo over /nologo)
51 * Note: Disable Warning 4200 "nonstandard extension used : zero-sized array
52 * in struct/union" for flexible array members.
54 #define DEFAULT_FLAGS "-nologo -Zi -W4 -wd4200 " \
55 "-D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS"
56 #define DEFAULT_OUTPUT_EXE_FLAG "-Fe:"
58 #define DEFAULT_COMPILER "cc"
59 #define DEFAULT_FLAGS "-g3 -ggdb -Wall -Wundef -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes -Wold-style-definition"
60 #define DEFAULT_OUTPUT_EXE_FLAG "-o"
63 #define OUTPUT_FILE "configurator.out"
64 #define INPUT_FILE "configuratortest.c"
72 static const char *progname = "";
74 static bool like_a_libtool = false;
80 * Template style flags (pick one):
82 * - put a simple boilerplate main below it.
84 * - defines a static function called func; adds ref to avoid warnings
86 * - put this inside main().
88 * - don't add any boilerplate at all.
92 * - a runtime test; must compile, exit 0 means flag is set.
94 * - Only useful with EXECUTE: don't get upset if it doesn't compile.
96 * - a compile test, if it compiles must run and exit 0.
101 const char *fragment;
103 const char *overrides; /* On success, force this to '1' */
108 /* Terminated by a NULL name */
109 static struct test *tests;
111 static const struct test base_tests[] = {
112 { "HAVE_32BIT_OFF_T", "off_t is 32 bits",
113 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
114 "#include <sys/types.h>\n"
116 " return sizeof(off_t) == 4 ? 0 : 1;\n"
118 { "HAVE_ALIGNOF", "__alignof__ support",
119 "INSIDE_MAIN", NULL, NULL,
120 "return __alignof__(double) > 0 ? 0 : 1;" },
121 { "HAVE_ASPRINTF", "asprintf() declaration",
122 "DEFINES_FUNC", NULL, NULL,
123 "#ifndef _GNU_SOURCE\n"
124 "#define _GNU_SOURCE\n"
126 "#include <stdio.h>\n"
127 "static char *func(int x) {"
129 " if (asprintf(&p, \"%u\", x) == -1) \n"
133 { "HAVE_ATTRIBUTE_COLD", "__attribute__((cold)) support",
134 "DEFINES_FUNC", NULL, NULL,
135 "static int __attribute__((cold)) func(int x) { return x; }" },
136 { "HAVE_ATTRIBUTE_CONST", "__attribute__((const)) support",
137 "DEFINES_FUNC", NULL, NULL,
138 "static int __attribute__((const)) func(int x) { return x; }" },
139 { "HAVE_ATTRIBUTE_DEPRECATED", "__attribute__((deprecated)) support",
140 "DEFINES_FUNC", NULL, NULL,
141 "static int __attribute__((deprecated)) func(int x) { return x; }" },
142 { "HAVE_ATTRIBUTE_NONNULL", "__attribute__((nonnull)) support",
143 "DEFINES_FUNC", NULL, NULL,
144 "static char *__attribute__((nonnull)) func(char *p) { return p; }" },
145 { "HAVE_ATTRIBUTE_SENTINEL", "__attribute__((sentinel)) support",
146 "DEFINES_FUNC", NULL, NULL,
147 "static int __attribute__((sentinel)) func(int i, ...) { return i; }" },
148 { "HAVE_ATTRIBUTE_PURE", "__attribute__((pure)) support",
149 "DEFINES_FUNC", NULL, NULL,
150 "static int __attribute__((pure)) func(int x) { return x; }" },
151 { "HAVE_ATTRIBUTE_MAY_ALIAS", "__attribute__((may_alias)) support",
152 "OUTSIDE_MAIN", NULL, NULL,
153 "typedef short __attribute__((__may_alias__)) short_a;" },
154 { "HAVE_ATTRIBUTE_NORETURN", "__attribute__((noreturn)) support",
155 "DEFINES_FUNC", NULL, NULL,
156 "#include <stdlib.h>\n"
157 "static void __attribute__((noreturn)) func(int x) { exit(x); }" },
158 { "HAVE_ATTRIBUTE_PRINTF", "__attribute__ format printf support",
159 "DEFINES_FUNC", NULL, NULL,
160 "static void __attribute__((format(__printf__, 1, 2))) func(const char *fmt, ...) { (void)fmt; }" },
161 { "HAVE_ATTRIBUTE_UNUSED", "__attribute__((unused)) support",
162 "OUTSIDE_MAIN", NULL, NULL,
163 "static int __attribute__((unused)) func(int x) { return x; }" },
164 { "HAVE_ATTRIBUTE_USED", "__attribute__((used)) support",
165 "OUTSIDE_MAIN", NULL, NULL,
166 "static int __attribute__((used)) func(int x) { return x; }" },
167 { "HAVE_BACKTRACE", "backtrace() in <execinfo.h>",
168 "DEFINES_FUNC", NULL, NULL,
169 "#include <execinfo.h>\n"
170 "static int func(int x) {"
172 " return backtrace(bt, 10) < x;\n"
174 { "HAVE_BIG_ENDIAN", "big endian",
175 "INSIDE_MAIN|EXECUTE", NULL, NULL,
176 "union { int i; char c[sizeof(int)]; } u;\n"
177 "u.i = 0x01020304;\n"
178 "return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;" },
179 { "HAVE_BSWAP_64", "bswap64 in byteswap.h",
180 "DEFINES_FUNC", "HAVE_BYTESWAP_H", NULL,
181 "#include <byteswap.h>\n"
182 "static int func(int x) { return bswap_64(x); }" },
183 { "HAVE_BUILTIN_CHOOSE_EXPR", "__builtin_choose_expr support",
184 "INSIDE_MAIN", NULL, NULL,
185 "return __builtin_choose_expr(1, 0, \"garbage\");" },
186 { "HAVE_BUILTIN_CLZ", "__builtin_clz support",
187 "INSIDE_MAIN", NULL, NULL,
188 "return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1;" },
189 { "HAVE_BUILTIN_CLZL", "__builtin_clzl support",
190 "INSIDE_MAIN", NULL, NULL,
191 "return __builtin_clzl(1) == (sizeof(long)*8 - 1) ? 0 : 1;" },
192 { "HAVE_BUILTIN_CLZLL", "__builtin_clzll support",
193 "INSIDE_MAIN", NULL, NULL,
194 "return __builtin_clzll(1) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
195 { "HAVE_BUILTIN_CTZ", "__builtin_ctz support",
196 "INSIDE_MAIN", NULL, NULL,
197 "return __builtin_ctz(1 << (sizeof(int)*8 - 1)) == (sizeof(int)*8 - 1) ? 0 : 1;" },
198 { "HAVE_BUILTIN_CTZL", "__builtin_ctzl support",
199 "INSIDE_MAIN", NULL, NULL,
200 "return __builtin_ctzl(1UL << (sizeof(long)*8 - 1)) == (sizeof(long)*8 - 1) ? 0 : 1;" },
201 { "HAVE_BUILTIN_CTZLL", "__builtin_ctzll support",
202 "INSIDE_MAIN", NULL, NULL,
203 "return __builtin_ctzll(1ULL << (sizeof(long long)*8 - 1)) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
204 { "HAVE_BUILTIN_CONSTANT_P", "__builtin_constant_p support",
205 "INSIDE_MAIN", NULL, NULL,
206 "return __builtin_constant_p(1) ? 0 : 1;" },
207 { "HAVE_BUILTIN_EXPECT", "__builtin_expect support",
208 "INSIDE_MAIN", NULL, NULL,
209 "return __builtin_expect(argc == 1, 1) ? 0 : 1;" },
210 { "HAVE_BUILTIN_FFS", "__builtin_ffs support",
211 "INSIDE_MAIN", NULL, NULL,
212 "return __builtin_ffs(0) == 0 ? 0 : 1;" },
213 { "HAVE_BUILTIN_FFSL", "__builtin_ffsl support",
214 "INSIDE_MAIN", NULL, NULL,
215 "return __builtin_ffsl(0L) == 0 ? 0 : 1;" },
216 { "HAVE_BUILTIN_FFSLL", "__builtin_ffsll support",
217 "INSIDE_MAIN", NULL, NULL,
218 "return __builtin_ffsll(0LL) == 0 ? 0 : 1;" },
219 { "HAVE_BUILTIN_POPCOUNT", "__builtin_popcount support",
220 "INSIDE_MAIN", NULL, NULL,
221 "return __builtin_popcount(255) == 8 ? 0 : 1;" },
222 { "HAVE_BUILTIN_POPCOUNTL", "__builtin_popcountl support",
223 "INSIDE_MAIN", NULL, NULL,
224 "return __builtin_popcountl(255L) == 8 ? 0 : 1;" },
225 { "HAVE_BUILTIN_POPCOUNTLL", "__builtin_popcountll support",
226 "INSIDE_MAIN", NULL, NULL,
227 "return __builtin_popcountll(255LL) == 8 ? 0 : 1;" },
228 { "HAVE_BUILTIN_TYPES_COMPATIBLE_P", "__builtin_types_compatible_p support",
229 "INSIDE_MAIN", NULL, NULL,
230 "return __builtin_types_compatible_p(char *, int) ? 1 : 0;" },
231 { "HAVE_ICCARM_INTRINSICS", "<intrinsics.h>",
232 "DEFINES_FUNC", NULL, NULL,
233 "#include <intrinsics.h>\n"
234 "int func(int v) {\n"
235 " return __CLZ(__RBIT(v));\n"
237 { "HAVE_BYTESWAP_H", "<byteswap.h>",
238 "OUTSIDE_MAIN", NULL, NULL,
239 "#include <byteswap.h>\n" },
240 { "HAVE_CLOCK_GETTIME", "clock_gettime() declaration",
241 "DEFINES_FUNC", "HAVE_STRUCT_TIMESPEC", NULL,
242 "#include <time.h>\n"
243 "static struct timespec func(void) {\n"
244 " struct timespec ts;\n"
245 " clock_gettime(CLOCK_REALTIME, &ts);\n"
248 { "HAVE_CLOCK_GETTIME_IN_LIBRT", "clock_gettime() in librt",
250 "HAVE_STRUCT_TIMESPEC !HAVE_CLOCK_GETTIME",
252 "#include <time.h>\n"
253 "static struct timespec func(void) {\n"
254 " struct timespec ts;\n"
255 " clock_gettime(CLOCK_REALTIME, &ts);\n"
258 /* This means HAVE_CLOCK_GETTIME, too */
259 "HAVE_CLOCK_GETTIME" },
260 { "HAVE_COMPOUND_LITERALS", "compound literal support",
261 "INSIDE_MAIN", NULL, NULL,
262 "int *foo = (int[]) { 1, 2, 3, 4 };\n"
263 "return foo[0] ? 0 : 1;" },
264 { "HAVE_FCHDIR", "fchdir support",
265 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
266 "#include <sys/types.h>\n"
267 "#include <sys/stat.h>\n"
268 "#include <fcntl.h>\n"
269 "#include <unistd.h>\n"
271 " int fd = open(\"..\", O_RDONLY);\n"
272 " return fchdir(fd) == 0 ? 0 : 1;\n"
274 { "HAVE_ERR_H", "<err.h>",
275 "DEFINES_FUNC", NULL, NULL,
277 "static void func(int arg) {\n"
279 " err(1, \"err %u\", arg);\n"
281 " errx(1, \"err %u\", arg);\n"
283 " warn(\"warn %u\", arg);\n"
285 " warnx(\"warn %u\", arg);\n"
287 { "HAVE_FILE_OFFSET_BITS", "_FILE_OFFSET_BITS to get 64-bit offsets",
288 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
289 "HAVE_32BIT_OFF_T", NULL,
290 "#define _FILE_OFFSET_BITS 64\n"
291 "#include <sys/types.h>\n"
293 " return sizeof(off_t) == 8 ? 0 : 1;\n"
295 { "HAVE_FOR_LOOP_DECLARATION", "for loop declaration support",
296 "INSIDE_MAIN", NULL, NULL,
298 "for (int i = 0; i < argc; i++) { ret = 0; };\n"
300 { "HAVE_FLEXIBLE_ARRAY_MEMBER", "flexible array member support",
301 "OUTSIDE_MAIN", NULL, NULL,
302 "struct foo { unsigned int x; int arr[]; };" },
303 { "HAVE_GETPAGESIZE", "getpagesize() in <unistd.h>",
304 "DEFINES_FUNC", NULL, NULL,
305 "#include <unistd.h>\n"
306 "static int func(void) { return getpagesize(); }" },
307 { "HAVE_ISBLANK", "isblank() in <ctype.h>",
308 "DEFINES_FUNC", NULL, NULL,
309 "#ifndef _GNU_SOURCE\n"
310 "#define _GNU_SOURCE\n"
312 "#include <ctype.h>\n"
313 "static int func(void) { return isblank(' '); }" },
314 { "HAVE_LITTLE_ENDIAN", "little endian",
315 "INSIDE_MAIN|EXECUTE", NULL, NULL,
316 "union { int i; char c[sizeof(int)]; } u;\n"
317 "u.i = 0x01020304;\n"
318 "return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;" },
319 { "HAVE_MEMMEM", "memmem in <string.h>",
320 "DEFINES_FUNC", NULL, NULL,
321 "#ifndef _GNU_SOURCE\n"
322 "#define _GNU_SOURCE\n"
324 "#include <string.h>\n"
325 "static void *func(void *h, size_t hl, void *n, size_t nl) {\n"
326 "return memmem(h, hl, n, nl);"
328 { "HAVE_MEMRCHR", "memrchr in <string.h>",
329 "DEFINES_FUNC", NULL, NULL,
330 "#ifndef _GNU_SOURCE\n"
331 "#define _GNU_SOURCE\n"
333 "#include <string.h>\n"
334 "static void *func(void *s, int c, size_t n) {\n"
335 "return memrchr(s, c, n);"
337 { "HAVE_MMAP", "mmap() declaration",
338 "DEFINES_FUNC", NULL, NULL,
339 "#include <sys/mman.h>\n"
340 "static void *func(int fd) {\n"
341 " return mmap(0, 65536, PROT_READ, MAP_SHARED, fd, 0);\n"
343 { "HAVE_PROC_SELF_MAPS", "/proc/self/maps exists",
344 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
345 "#include <sys/types.h>\n"
346 "#include <sys/stat.h>\n"
347 "#include <fcntl.h>\n"
349 " return open(\"/proc/self/maps\", O_RDONLY) != -1 ? 0 : 1;\n"
351 { "HAVE_QSORT_R_PRIVATE_LAST", "qsort_r cmp takes trailing arg",
352 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
353 "#ifndef _GNU_SOURCE\n"
354 "#define _GNU_SOURCE\n"
356 "#include <stdlib.h>\n"
357 "static int cmp(const void *lp, const void *rp, void *priv) {\n"
358 " *(unsigned int *)priv = 1;\n"
359 " return *(const int *)lp - *(const int *)rp; }\n"
361 " int array[] = { 9, 2, 5 };\n"
362 " unsigned int called = 0;\n"
363 " qsort_r(array, 3, sizeof(int), cmp, &called);\n"
364 " return called && array[0] == 2 && array[1] == 5 && array[2] == 9 ? 0 : 1;\n"
366 { "HAVE_STRUCT_TIMESPEC", "struct timespec declaration",
367 "DEFINES_FUNC", NULL, NULL,
368 "#include <time.h>\n"
369 "static void func(void) {\n"
370 " struct timespec ts;\n"
371 " ts.tv_sec = ts.tv_nsec = 1;\n"
373 { "HAVE_SECTION_START_STOP", "__attribute__((section)) and __start/__stop",
374 "DEFINES_FUNC", NULL, NULL,
375 "static void *__attribute__((__section__(\"mysec\"))) p = &p;\n"
376 "static int func(void) {\n"
377 " extern void *__start_mysec[], *__stop_mysec[];\n"
378 " return __stop_mysec - __start_mysec;\n"
380 { "HAVE_STACK_GROWS_UPWARDS", "stack grows upwards",
381 "DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
382 "#include <stddef.h>\n"
383 "static ptrdiff_t nest(const void *base, unsigned int i)\n"
386 " return (const char *)&i - (const char *)base;\n"
387 " return nest(base, i-1);\n"
389 "int main(int argc, char *argv[]) {\n"
391 " return (nest(&argc, argc) > 0) ? 0 : 1;\n"
393 { "HAVE_STATEMENT_EXPR", "statement expression support",
394 "INSIDE_MAIN", NULL, NULL,
395 "return ({ int x = argc; x == argc ? 0 : 1; });" },
396 { "HAVE_SYS_FILIO_H", "<sys/filio.h>",
397 "OUTSIDE_MAIN", NULL, NULL, /* Solaris needs this for FIONREAD */
398 "#include <sys/filio.h>\n" },
399 { "HAVE_SYS_TERMIOS_H", "<sys/termios.h>",
400 "OUTSIDE_MAIN", NULL, NULL,
401 "#include <sys/termios.h>\n" },
402 { "HAVE_SYS_UNISTD_H", "<sys/unistd.h>",
403 "OUTSIDE_MAIN", NULL, NULL,
404 "#include <sys/unistd.h>\n" },
405 { "HAVE_TYPEOF", "__typeof__ support",
406 "INSIDE_MAIN", NULL, NULL,
407 "__typeof__(argc) i; i = argc; return i == argc ? 0 : 1;" },
408 { "HAVE_UNALIGNED_ACCESS", "unaligned access to int",
409 "DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
410 "#include <string.h>\n"
411 "int main(int argc, char *argv[]) {\n"
413 " char pad[sizeof(int *) * 1];\n"
414 " strncpy(pad, argv[0], sizeof(pad));\n"
415 " int *x = (int *)pad, *y = (int *)(pad + 1);\n"
416 " return *x == *y;\n"
418 { "HAVE_UTIME", "utime() declaration",
419 "DEFINES_FUNC", NULL, NULL,
420 "#include <sys/types.h>\n"
421 "#include <utime.h>\n"
422 "static int func(const char *filename) {\n"
423 " struct utimbuf times = { 0 };\n"
424 " return utime(filename, ×);\n"
426 { "HAVE_WARN_UNUSED_RESULT", "__attribute__((warn_unused_result))",
427 "DEFINES_FUNC", NULL, NULL,
428 "#include <sys/types.h>\n"
429 "#include <utime.h>\n"
430 "static __attribute__((warn_unused_result)) int func(int i) {\n"
433 { "HAVE_OPENMP", "#pragma omp and -fopenmp support",
434 "INSIDE_MAIN|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
436 "#pragma omp parallel for\n"
437 "for(i = 0; i < 0; i++) {};\n"
439 "-Werror -fopenmp" },
440 { "HAVE_VALGRIND_MEMCHECK_H", "<valgrind/memcheck.h>",
441 "OUTSIDE_MAIN", NULL, NULL,
442 "#include <valgrind/memcheck.h>\n" },
443 { "HAVE_UCONTEXT", "working <ucontext.h",
444 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
446 "#include <ucontext.h>\n"
447 "static int x = 0;\n"
448 "static char stack[2048];\n"
449 "static ucontext_t a, b;\n"
450 "static void fn(void) {\n"
458 " a.uc_stack.ss_sp = stack;\n"
459 " a.uc_stack.ss_size = sizeof(stack);\n"
460 " makecontext(&a, fn, 0);\n"
461 " swapcontext(&b, &a);\n"
462 " return (x == 3) ? 0 : 1;\n"
465 { "HAVE_POINTER_SAFE_MAKECONTEXT", "passing pointers via makecontext()",
466 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
467 "HAVE_UCONTEXT", NULL,
468 "#include <stddef.h>\n"
469 "#include <ucontext.h>\n"
470 "static int worked = 0;\n"
471 "static char stack[1024];\n"
472 "static ucontext_t a, b;\n"
473 "static void fn(void *p, void *q) {\n"
474 " void *cp = &worked;\n"
475 " void *cq = (void *)(~((ptrdiff_t)cp));\n"
476 " if ((p == cp) && (q == cq))\n"
481 " void *ap = &worked;\n"
482 " void *aq = (void *)(~((ptrdiff_t)ap));\n"
484 " a.uc_stack.ss_sp = stack;\n"
485 " a.uc_stack.ss_size = sizeof(stack);\n"
486 " makecontext(&a, (void (*)(void))fn, 2, ap, aq);\n"
487 " swapcontext(&b, &a);\n"
488 " return worked ? 0 : 1;\n"
491 { "HAVE_BUILTIN_CPU_SUPPORTS", "__builtin_cpu_supports()",
492 "DEFINES_FUNC", NULL, NULL,
493 "#include <stdbool.h>\n"
494 "static bool func(void) {\n"
495 " return __builtin_cpu_supports(\"mmx\");\n"
500 static void c12r_err(int eval, const char *fmt, ...)
502 int err_errno = errno;
505 fprintf(stderr, "%s: ", progname);
507 vfprintf(stderr, fmt, ap);
509 fprintf(stderr, ": %s\n", strerror(err_errno));
513 static void c12r_errx(int eval, const char *fmt, ...)
517 fprintf(stderr, "%s: ", progname);
519 vfprintf(stderr, fmt, ap);
521 fprintf(stderr, "\n");
525 static void start_test(const char *what, const char *why)
527 if (like_a_libtool) {
528 printf("%s%s... ", what, why);
533 static void end_test(bool result)
536 printf("%s\n", result ? "yes" : "no");
539 static size_t fcopy(FILE *fsrc, FILE *fdst)
545 while ((rsize = fread(buffer, 1, BUFSIZ, fsrc)) > 0) {
546 wsize = fwrite(buffer, 1, rsize, fdst);
555 static char *grab_stream(FILE *file)
557 size_t max, ret, size = 0;
561 buffer = malloc(max);
562 while ((ret = fread(buffer+size, 1, max - size, file)) == max - size) {
564 buffer = realloc(buffer, max *= 2);
568 c12r_err(EXIT_TROUBLE_RUNNING, "reading from command");
573 static char *run(const char *cmd, int *exitstatus)
575 static const char redir[] = " 2>&1";
581 cmdlen = strlen(cmd);
582 cmdredir = malloc(cmdlen + sizeof(redir));
583 memcpy(cmdredir, cmd, cmdlen);
584 memcpy(cmdredir + cmdlen, redir, sizeof(redir));
586 cmdout = popen(cmdredir, "r");
588 c12r_err(EXIT_TROUBLE_RUNNING, "popen \"%s\"", cmdredir);
592 ret = grab_stream(cmdout);
593 *exitstatus = pclose(cmdout);
597 static char *connect_args(const char *argv[], const char *outflag,
602 size_t len = strlen(outflag) + strlen(files) + 1;
604 for (i = 1; argv[i]; i++)
605 len += 1 + strlen(argv[i]);
609 for (i = 1; argv[i]; i++) {
610 strcpy(ret + len, argv[i]);
611 len += strlen(argv[i]);
612 if (argv[i+1] || *outflag)
615 strcpy(ret + len, outflag);
616 len += strlen(outflag);
617 strcpy(ret + len, files);
621 static struct test *find_test(const char *name)
625 for (i = 0; tests[i].name; i++) {
626 if (strcmp(tests[i].name, name) == 0)
629 c12r_errx(EXIT_BAD_TEST, "Unknown test %s", name);
633 #define PRE_BOILERPLATE "/* Test program generated by configurator. */\n"
634 #define MAIN_START_BOILERPLATE \
635 "int main(int argc, char *argv[]) {\n" \
638 #define USE_FUNC_BOILERPLATE "(void)func;\n"
639 #define MAIN_BODY_BOILERPLATE "return 0;\n"
640 #define MAIN_END_BOILERPLATE "}\n"
642 static bool run_test(const char *cmd, const char* wrapper, struct test *test)
644 char *output, *newcmd;
653 const char *deps = test->depends;
656 /* Space-separated dependencies, could be ! for inverse. */
657 while ((len = strcspn(deps, " ")) != 0) {
658 bool positive = true;
670 if (run_test(cmd, wrapper, find_test(dep)) != positive) {
671 test->answer = false;
679 deps += strspn(deps, " ");
683 outf = fopen(INPUT_FILE, verbose > 1 ? "w+" : "w");
685 c12r_err(EXIT_TROUBLE_RUNNING, "creating %s", INPUT_FILE);
687 fprintf(outf, "%s", PRE_BOILERPLATE);
689 if (strstr(test->style, "INSIDE_MAIN")) {
690 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
691 fprintf(outf, "%s", test->fragment);
692 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
693 } else if (strstr(test->style, "OUTSIDE_MAIN")) {
694 fprintf(outf, "%s", test->fragment);
695 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
696 fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
697 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
698 } else if (strstr(test->style, "DEFINES_FUNC")) {
699 fprintf(outf, "%s", test->fragment);
700 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
701 fprintf(outf, "%s", USE_FUNC_BOILERPLATE);
702 fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
703 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
704 } else if (strstr(test->style, "DEFINES_EVERYTHING")) {
705 fprintf(outf, "%s", test->fragment);
707 c12r_errx(EXIT_BAD_TEST, "Unknown style for test %s: %s",
708 test->name, test->style);
711 fseek(outf, 0, SEEK_SET);
717 newcmd = strdup(cmd);
720 newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
721 + strlen(test->flags) + 1);
723 strcat(newcmd, test->flags);
725 printf("Extra flags line: %s", newcmd);
729 newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
730 + strlen(test->link) + 1);
732 strcat(newcmd, test->link);
734 printf("Extra link line: %s", newcmd);
737 start_test("checking for ", test->desc);
738 output = run(newcmd, &status);
742 if (status != 0 || strstr(output, "warning")) {
744 printf("Compile %s for %s, status %i: %s\n",
745 status ? "fail" : "warning",
746 test->name, status, output);
747 if (strstr(test->style, "EXECUTE")
748 && !strstr(test->style, "MAY_NOT_COMPILE"))
749 c12r_errx(EXIT_BAD_TEST,
750 "Test for %s did not compile:\n%s",
752 test->answer = false;
755 /* Compile succeeded. */
757 /* We run INSIDE_MAIN tests for sanity checking. */
758 if (strstr(test->style, "EXECUTE")
759 || strstr(test->style, "INSIDE_MAIN")) {
760 char* cmd = "." DIR_SEP OUTPUT_FILE;
762 // string length and null terminator.
763 size_t size = strlen(wrapper) + strlen(" ") + strlen(cmd) + 1;
764 char* newcmd = malloc(size);
765 memset(newcmd, '\0', size);
766 strcat(newcmd, wrapper);
771 output = run(cmd, &status);
775 if (!strstr(test->style, "EXECUTE") && status != 0)
776 c12r_errx(EXIT_BAD_TEST,
777 "Test for %s failed with %i:\n%s",
778 test->name, status, output);
779 if (verbose && status)
780 printf("%s exited %i\n", test->name, status);
783 test->answer = (status == 0);
786 end_test(test->answer);
788 if (test->answer && test->overrides) {
789 struct test *override = find_test(test->overrides);
790 override->done = true;
791 override->answer = true;
796 static char *any_field(char **fieldname)
802 if (!fgets(buf, sizeof(buf), stdin))
806 /* Ignore whitespace, lines starting with # */
807 while (*p == ' ' || *p == '\t')
809 if (*p == '#' || *p == '\n')
814 c12r_errx(EXIT_BAD_INPUT, "no = in line: %s", p);
816 *fieldname = strdup(p);
818 if (strlen(p) && p[strlen(p)-1] == '\n')
819 p[strlen(p)-1] = '\0';
824 static char *read_field(const char *name, bool compulsory)
826 char *fieldname, *value;
828 value = any_field(&fieldname);
832 c12r_errx(EXIT_BAD_INPUT, "Could not read field %s", name);
834 if (strcmp(fieldname, name) != 0)
835 c12r_errx(EXIT_BAD_INPUT,
836 "Expected field %s not %s", name, fieldname);
840 /* Test descriptions from stdin:
841 * Lines starting with # or whitespace-only are ignored.
843 * First three non-ignored lines must be:
845 * desc=<description-for-autotools-style>
846 * style=OUTSIDE_MAIN DEFINES_FUNC INSIDE_MAIN DEFINES_EVERYTHING EXECUTE MAY_NOT_COMPILE
848 * Followed by optional lines:
849 * depends=<space-separated-testnames, ! to invert>
850 * link=<extra args for link line>
851 * flags=<extra args for compile line>
852 * overrides=<testname-to-force>
854 * Finally a code line, either:
860 * And <end-comment> looks like this next comment: */
862 static bool read_test(struct test *test)
867 memset(test, 0, sizeof(*test));
868 test->name = read_field("var", false);
871 test->desc = read_field("desc", true);
872 test->style = read_field("style", true);
873 /* Read any optional fields. */
874 while ((value = any_field(&field)) != NULL) {
875 if (strcmp(field, "depends") == 0)
876 test->depends = value;
877 else if (strcmp(field, "link") == 0)
879 else if (strcmp(field, "flags") == 0)
881 else if (strcmp(field, "overrides") == 0)
882 test->overrides = value;
883 else if (strcmp(field, "code") == 0)
886 c12r_errx(EXIT_BAD_INPUT, "Unknown field %s in %s",
890 c12r_errx(EXIT_BAD_INPUT, "Missing code in %s", test->name);
892 if (strlen(value) == 0) {
893 /* Multiline program, read to END comment */
894 while (fgets(buf, sizeof(buf), stdin) != 0) {
896 if (strncmp(buf, "/*END*/", 7) == 0)
899 value = realloc(value, n + strlen(buf) + 1);
900 strcpy(value + n, buf);
904 test->fragment = value;
908 static void read_tests(size_t num_tests)
910 while (read_test(tests + num_tests)) {
912 tests = realloc(tests, (num_tests + 1) * sizeof(tests[0]));
913 tests[num_tests].name = NULL;
917 int main(int argc, const char *argv[])
921 const char *default_args[]
922 = { "", DEFAULT_COMPILER, DEFAULT_FLAGS, NULL };
923 const char *outflag = DEFAULT_OUTPUT_EXE_FLAG;
924 const char *configurator_cc = NULL;
925 const char *wrapper = NULL;
927 const char *varfile = NULL;
928 const char *headerfile = NULL;
929 bool extra_tests = false;
936 if (strcmp(argv[1], "--help") == 0) {
937 printf("Usage: configurator [-v] [--var-file=<filename>] [-O<outflag>] [--configurator-cc=<compiler-for-tests>] [--wrapper=<wrapper-for-tests>] [--autotools-style] [--extra-tests] [<compiler> <flags>...]\n"
938 " <compiler> <flags> will have \"<outflag> <outfile> <infile.c>\" appended\n"
939 "Default: %s %s %s\n",
940 DEFAULT_COMPILER, DEFAULT_FLAGS,
941 DEFAULT_OUTPUT_EXE_FLAG);
944 if (strncmp(argv[1], "-O", 2) == 0) {
947 outflag = argv[1] + 2;
950 "%s: option requires an argument -- O\n",
952 exit(EXIT_BAD_USAGE);
954 } else if (strcmp(argv[1], "-v") == 0) {
958 } else if (strcmp(argv[1], "-vv") == 0) {
962 } else if (strncmp(argv[1], "--configurator-cc=", 18) == 0) {
963 configurator_cc = argv[1] + 18;
966 } else if (strncmp(argv[1], "--wrapper=", 10) == 0) {
967 wrapper = argv[1] + 10;
970 } else if (strncmp(argv[1], "--var-file=", 11) == 0) {
971 varfile = argv[1] + 11;
974 } else if (strcmp(argv[1], "--autotools-style") == 0) {
975 like_a_libtool = true;
978 } else if (strncmp(argv[1], "--header-file=", 14) == 0) {
979 headerfile = argv[1] + 14;
982 } else if (strcmp(argv[1], "--extra-tests") == 0) {
986 } else if (strcmp(argv[1], "--") == 0) {
988 } else if (argv[1][0] == '-') {
989 c12r_errx(EXIT_BAD_USAGE, "Unknown option %s", argv[1]);
998 /* Copy with NULL entry at end */
999 tests = calloc(sizeof(base_tests)/sizeof(base_tests[0]) + 1,
1000 sizeof(base_tests[0]));
1001 memcpy(tests, base_tests, sizeof(base_tests));
1004 read_tests(sizeof(base_tests)/sizeof(base_tests[0]));
1007 if (configurator_cc)
1008 argv[1] = configurator_cc;
1010 cmd = connect_args(argv, outflag, OUTPUT_FILE " " INPUT_FILE);
1011 if (like_a_libtool) {
1012 start_test("Making autoconf users comfortable", "");
1016 for (i = 0; tests[i].name; i++)
1017 run_test(cmd, wrapper, &tests[i]);
1020 remove(OUTPUT_FILE);
1026 if (strcmp(varfile, "-") == 0)
1029 start_test("Writing variables to ", varfile);
1030 vars = fopen(varfile, "a");
1032 c12r_err(EXIT_TROUBLE_RUNNING,
1033 "Could not open %s", varfile);
1035 for (i = 0; tests[i].name; i++)
1036 fprintf(vars, "%s=%u\n", tests[i].name, tests[i].answer);
1037 if (vars != stdout) {
1038 if (fclose(vars) != 0)
1039 c12r_err(EXIT_TROUBLE_RUNNING,
1040 "Closing %s", varfile);
1046 start_test("Writing header to ", headerfile);
1047 outf = fopen(headerfile, "w");
1049 c12r_err(EXIT_TROUBLE_RUNNING,
1050 "Could not open %s", headerfile);
1054 fprintf(outf, "/* Generated by CCAN configurator */\n"
1055 "#ifndef CCAN_CONFIG_H\n"
1056 "#define CCAN_CONFIG_H\n");
1057 fprintf(outf, "#ifndef _GNU_SOURCE\n");
1058 fprintf(outf, "#define _GNU_SOURCE /* Always use GNU extensions. */\n");
1059 fprintf(outf, "#endif\n");
1060 fprintf(outf, "#define CCAN_COMPILER \"%s\"\n", orig_cc);
1061 cmd = connect_args(argv + 1, "", "");
1062 fprintf(outf, "#define CCAN_CFLAGS \"%s\"\n", cmd);
1064 fprintf(outf, "#define CCAN_OUTPUT_EXE_CFLAG \"%s\"\n\n", outflag);
1065 /* This one implies "#include <ccan/..." works, eg. for tdb2.h */
1066 fprintf(outf, "#define HAVE_CCAN 1\n");
1067 for (i = 0; tests[i].name; i++)
1068 fprintf(outf, "#define %s %u\n", tests[i].name, tests[i].answer);
1069 fprintf(outf, "#endif /* CCAN_CONFIG_H */\n");
1072 if (fclose(outf) != 0)
1073 c12r_err(EXIT_TROUBLE_RUNNING, "Closing %s", headerfile);