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_RETURNS_NONNULL", "__attribute__((returns_nonnull)) support",
146 "DEFINES_FUNC", NULL, NULL,
147 "static const char *__attribute__((returns_nonnull)) func(void) { return \"hi\"; }" },
148 { "HAVE_ATTRIBUTE_SENTINEL", "__attribute__((sentinel)) support",
149 "DEFINES_FUNC", NULL, NULL,
150 "static int __attribute__((sentinel)) func(int i, ...) { return i; }" },
151 { "HAVE_ATTRIBUTE_PURE", "__attribute__((pure)) support",
152 "DEFINES_FUNC", NULL, NULL,
153 "static int __attribute__((pure)) func(int x) { return x; }" },
154 { "HAVE_ATTRIBUTE_MAY_ALIAS", "__attribute__((may_alias)) support",
155 "OUTSIDE_MAIN", NULL, NULL,
156 "typedef short __attribute__((__may_alias__)) short_a;" },
157 { "HAVE_ATTRIBUTE_NORETURN", "__attribute__((noreturn)) support",
158 "DEFINES_FUNC", NULL, NULL,
159 "#include <stdlib.h>\n"
160 "static void __attribute__((noreturn)) func(int x) { exit(x); }" },
161 { "HAVE_ATTRIBUTE_PRINTF", "__attribute__ format printf support",
162 "DEFINES_FUNC", NULL, NULL,
163 "static void __attribute__((format(__printf__, 1, 2))) func(const char *fmt, ...) { (void)fmt; }" },
164 { "HAVE_ATTRIBUTE_UNUSED", "__attribute__((unused)) support",
165 "OUTSIDE_MAIN", NULL, NULL,
166 "static int __attribute__((unused)) func(int x) { return x; }" },
167 { "HAVE_ATTRIBUTE_USED", "__attribute__((used)) support",
168 "OUTSIDE_MAIN", NULL, NULL,
169 "static int __attribute__((used)) func(int x) { return x; }" },
170 { "HAVE_BACKTRACE", "backtrace() in <execinfo.h>",
171 "DEFINES_FUNC", NULL, NULL,
172 "#include <execinfo.h>\n"
173 "static int func(int x) {"
175 " return backtrace(bt, 10) < x;\n"
177 { "HAVE_BIG_ENDIAN", "big endian",
178 "INSIDE_MAIN|EXECUTE", NULL, NULL,
179 "union { int i; char c[sizeof(int)]; } u;\n"
180 "u.i = 0x01020304;\n"
181 "return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;" },
182 { "HAVE_BSWAP_64", "bswap64 in byteswap.h",
183 "DEFINES_FUNC", "HAVE_BYTESWAP_H", NULL,
184 "#include <byteswap.h>\n"
185 "static int func(int x) { return bswap_64(x); }" },
186 { "HAVE_BUILTIN_CHOOSE_EXPR", "__builtin_choose_expr support",
187 "INSIDE_MAIN", NULL, NULL,
188 "return __builtin_choose_expr(1, 0, \"garbage\");" },
189 { "HAVE_BUILTIN_CLZ", "__builtin_clz support",
190 "INSIDE_MAIN", NULL, NULL,
191 "return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1;" },
192 { "HAVE_BUILTIN_CLZL", "__builtin_clzl support",
193 "INSIDE_MAIN", NULL, NULL,
194 "return __builtin_clzl(1) == (sizeof(long)*8 - 1) ? 0 : 1;" },
195 { "HAVE_BUILTIN_CLZLL", "__builtin_clzll support",
196 "INSIDE_MAIN", NULL, NULL,
197 "return __builtin_clzll(1) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
198 { "HAVE_BUILTIN_CTZ", "__builtin_ctz support",
199 "INSIDE_MAIN", NULL, NULL,
200 "return __builtin_ctz(1U << (sizeof(int)*8 - 1)) == (sizeof(int)*8 - 1) ? 0 : 1;" },
201 { "HAVE_BUILTIN_CTZL", "__builtin_ctzl support",
202 "INSIDE_MAIN", NULL, NULL,
203 "return __builtin_ctzl(1UL << (sizeof(long)*8 - 1)) == (sizeof(long)*8 - 1) ? 0 : 1;" },
204 { "HAVE_BUILTIN_CTZLL", "__builtin_ctzll support",
205 "INSIDE_MAIN", NULL, NULL,
206 "return __builtin_ctzll(1ULL << (sizeof(long long)*8 - 1)) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
207 { "HAVE_BUILTIN_CONSTANT_P", "__builtin_constant_p support",
208 "INSIDE_MAIN", NULL, NULL,
209 "return __builtin_constant_p(1) ? 0 : 1;" },
210 { "HAVE_BUILTIN_EXPECT", "__builtin_expect support",
211 "INSIDE_MAIN", NULL, NULL,
212 "return __builtin_expect(argc == 1, 1) ? 0 : 1;" },
213 { "HAVE_BUILTIN_FFS", "__builtin_ffs support",
214 "INSIDE_MAIN", NULL, NULL,
215 "return __builtin_ffs(0) == 0 ? 0 : 1;" },
216 { "HAVE_BUILTIN_FFSL", "__builtin_ffsl support",
217 "INSIDE_MAIN", NULL, NULL,
218 "return __builtin_ffsl(0L) == 0 ? 0 : 1;" },
219 { "HAVE_BUILTIN_FFSLL", "__builtin_ffsll support",
220 "INSIDE_MAIN", NULL, NULL,
221 "return __builtin_ffsll(0LL) == 0 ? 0 : 1;" },
222 { "HAVE_BUILTIN_POPCOUNT", "__builtin_popcount support",
223 "INSIDE_MAIN", NULL, NULL,
224 "return __builtin_popcount(255) == 8 ? 0 : 1;" },
225 { "HAVE_BUILTIN_POPCOUNTL", "__builtin_popcountl support",
226 "INSIDE_MAIN", NULL, NULL,
227 "return __builtin_popcountl(255L) == 8 ? 0 : 1;" },
228 { "HAVE_BUILTIN_POPCOUNTLL", "__builtin_popcountll support",
229 "INSIDE_MAIN", NULL, NULL,
230 "return __builtin_popcountll(255LL) == 8 ? 0 : 1;" },
231 { "HAVE_BUILTIN_TYPES_COMPATIBLE_P", "__builtin_types_compatible_p support",
232 "INSIDE_MAIN", NULL, NULL,
233 "return __builtin_types_compatible_p(char *, int) ? 1 : 0;" },
234 { "HAVE_ICCARM_INTRINSICS", "<intrinsics.h>",
235 "DEFINES_FUNC", NULL, NULL,
236 "#include <intrinsics.h>\n"
237 "int func(int v) {\n"
238 " return __CLZ(__RBIT(v));\n"
240 { "HAVE_BYTESWAP_H", "<byteswap.h>",
241 "OUTSIDE_MAIN", NULL, NULL,
242 "#include <byteswap.h>\n" },
243 { "HAVE_CLOCK_GETTIME", "clock_gettime() declaration",
244 "DEFINES_FUNC", "HAVE_STRUCT_TIMESPEC", NULL,
245 "#include <time.h>\n"
246 "static struct timespec func(void) {\n"
247 " struct timespec ts;\n"
248 " clock_gettime(CLOCK_REALTIME, &ts);\n"
251 { "HAVE_CLOCK_GETTIME_IN_LIBRT", "clock_gettime() in librt",
253 "HAVE_STRUCT_TIMESPEC !HAVE_CLOCK_GETTIME",
255 "#include <time.h>\n"
256 "static struct timespec func(void) {\n"
257 " struct timespec ts;\n"
258 " clock_gettime(CLOCK_REALTIME, &ts);\n"
261 /* This means HAVE_CLOCK_GETTIME, too */
262 "HAVE_CLOCK_GETTIME" },
263 { "HAVE_COMPOUND_LITERALS", "compound literal support",
264 "INSIDE_MAIN", NULL, NULL,
265 "int *foo = (int[]) { 1, 2, 3, 4 };\n"
266 "return foo[0] ? 0 : 1;" },
267 { "HAVE_FCHDIR", "fchdir support",
268 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
269 "#include <sys/types.h>\n"
270 "#include <sys/stat.h>\n"
271 "#include <fcntl.h>\n"
272 "#include <unistd.h>\n"
274 " int fd = open(\"..\", O_RDONLY);\n"
275 " return fchdir(fd) == 0 ? 0 : 1;\n"
277 { "HAVE_ERR_H", "<err.h>",
278 "DEFINES_FUNC", NULL, NULL,
280 "static void func(int arg) {\n"
282 " err(1, \"err %u\", arg);\n"
284 " errx(1, \"err %u\", arg);\n"
286 " warn(\"warn %u\", arg);\n"
288 " warnx(\"warn %u\", arg);\n"
290 { "HAVE_FILE_OFFSET_BITS", "_FILE_OFFSET_BITS to get 64-bit offsets",
291 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
292 "HAVE_32BIT_OFF_T", NULL,
293 "#define _FILE_OFFSET_BITS 64\n"
294 "#include <sys/types.h>\n"
296 " return sizeof(off_t) == 8 ? 0 : 1;\n"
298 { "HAVE_FOR_LOOP_DECLARATION", "for loop declaration support",
299 "INSIDE_MAIN", NULL, NULL,
301 "for (int i = 0; i < argc; i++) { ret = 0; };\n"
303 { "HAVE_FLEXIBLE_ARRAY_MEMBER", "flexible array member support",
304 "OUTSIDE_MAIN", NULL, NULL,
305 "struct foo { unsigned int x; int arr[]; };" },
306 { "HAVE_GETPAGESIZE", "getpagesize() in <unistd.h>",
307 "DEFINES_FUNC", NULL, NULL,
308 "#include <unistd.h>\n"
309 "static int func(void) { return getpagesize(); }" },
310 { "HAVE_ISBLANK", "isblank() in <ctype.h>",
311 "DEFINES_FUNC", NULL, NULL,
312 "#ifndef _GNU_SOURCE\n"
313 "#define _GNU_SOURCE\n"
315 "#include <ctype.h>\n"
316 "static int func(void) { return isblank(' '); }" },
317 { "HAVE_LITTLE_ENDIAN", "little endian",
318 "INSIDE_MAIN|EXECUTE", NULL, NULL,
319 "union { int i; char c[sizeof(int)]; } u;\n"
320 "u.i = 0x01020304;\n"
321 "return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;" },
322 { "HAVE_MEMMEM", "memmem in <string.h>",
323 "DEFINES_FUNC", NULL, NULL,
324 "#ifndef _GNU_SOURCE\n"
325 "#define _GNU_SOURCE\n"
327 "#include <string.h>\n"
328 "static void *func(void *h, size_t hl, void *n, size_t nl) {\n"
329 "return memmem(h, hl, n, nl);"
331 { "HAVE_MEMRCHR", "memrchr in <string.h>",
332 "DEFINES_FUNC", NULL, NULL,
333 "#ifndef _GNU_SOURCE\n"
334 "#define _GNU_SOURCE\n"
336 "#include <string.h>\n"
337 "static void *func(void *s, int c, size_t n) {\n"
338 "return memrchr(s, c, n);"
340 { "HAVE_MMAP", "mmap() declaration",
341 "DEFINES_FUNC", NULL, NULL,
342 "#include <sys/mman.h>\n"
343 "static void *func(int fd) {\n"
344 " return mmap(0, 65536, PROT_READ, MAP_SHARED, fd, 0);\n"
346 { "HAVE_PROC_SELF_MAPS", "/proc/self/maps exists",
347 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
348 "#include <sys/types.h>\n"
349 "#include <sys/stat.h>\n"
350 "#include <fcntl.h>\n"
352 " return open(\"/proc/self/maps\", O_RDONLY) != -1 ? 0 : 1;\n"
354 { "HAVE_QSORT_R_PRIVATE_LAST", "qsort_r cmp takes trailing arg",
355 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
356 "#ifndef _GNU_SOURCE\n"
357 "#define _GNU_SOURCE\n"
359 "#include <stdlib.h>\n"
360 "static int cmp(const void *lp, const void *rp, void *priv) {\n"
361 " *(unsigned int *)priv = 1;\n"
362 " return *(const int *)lp - *(const int *)rp; }\n"
364 " int array[] = { 9, 2, 5 };\n"
365 " unsigned int called = 0;\n"
366 " qsort_r(array, 3, sizeof(int), cmp, &called);\n"
367 " return called && array[0] == 2 && array[1] == 5 && array[2] == 9 ? 0 : 1;\n"
369 { "HAVE_STRUCT_TIMESPEC", "struct timespec declaration",
370 "DEFINES_FUNC", NULL, NULL,
371 "#include <time.h>\n"
372 "static void func(void) {\n"
373 " struct timespec ts;\n"
374 " ts.tv_sec = ts.tv_nsec = 1;\n"
376 { "HAVE_SECTION_START_STOP", "__attribute__((section)) and __start/__stop",
377 "DEFINES_FUNC", NULL, NULL,
378 "static void *__attribute__((__section__(\"mysec\"))) p = &p;\n"
379 "static int func(void) {\n"
380 " extern void *__start_mysec[], *__stop_mysec[];\n"
381 " return __stop_mysec - __start_mysec;\n"
383 { "HAVE_STACK_GROWS_UPWARDS", "stack grows upwards",
384 "DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
385 "#include <stddef.h>\n"
386 "static ptrdiff_t nest(const void *base, unsigned int i)\n"
389 " return (const char *)&i - (const char *)base;\n"
390 " return nest(base, i-1);\n"
392 "int main(int argc, char *argv[]) {\n"
394 " return (nest(&argc, argc) > 0) ? 0 : 1;\n"
396 { "HAVE_STATEMENT_EXPR", "statement expression support",
397 "INSIDE_MAIN", NULL, NULL,
398 "return ({ int x = argc; x == argc ? 0 : 1; });" },
399 { "HAVE_SYS_FILIO_H", "<sys/filio.h>",
400 "OUTSIDE_MAIN", NULL, NULL, /* Solaris needs this for FIONREAD */
401 "#include <sys/filio.h>\n" },
402 { "HAVE_SYS_TERMIOS_H", "<sys/termios.h>",
403 "OUTSIDE_MAIN", NULL, NULL,
404 "#include <sys/termios.h>\n" },
405 { "HAVE_SYS_UNISTD_H", "<sys/unistd.h>",
406 "OUTSIDE_MAIN", NULL, NULL,
407 "#include <sys/unistd.h>\n" },
408 { "HAVE_TYPEOF", "__typeof__ support",
409 "INSIDE_MAIN", NULL, NULL,
410 "__typeof__(argc) i; i = argc; return i == argc ? 0 : 1;" },
411 { "HAVE_UNALIGNED_ACCESS", "unaligned access to int",
412 "DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
413 "#include <string.h>\n"
414 "int main(int argc, char *argv[]) {\n"
416 " char pad[sizeof(int *) * 1];\n"
417 " memcpy(pad, argv[0], sizeof(pad));\n"
418 " int *x = (int *)pad, *y = (int *)(pad + 1);\n"
419 " return *x == *y;\n"
421 { "HAVE_UTIME", "utime() declaration",
422 "DEFINES_FUNC", NULL, NULL,
423 "#include <sys/types.h>\n"
424 "#include <utime.h>\n"
425 "static int func(const char *filename) {\n"
426 " struct utimbuf times = { 0 };\n"
427 " return utime(filename, ×);\n"
429 { "HAVE_WARN_UNUSED_RESULT", "__attribute__((warn_unused_result))",
430 "DEFINES_FUNC", NULL, NULL,
431 "#include <sys/types.h>\n"
432 "#include <utime.h>\n"
433 "static __attribute__((warn_unused_result)) int func(int i) {\n"
436 { "HAVE_OPENMP", "#pragma omp and -fopenmp support",
437 "INSIDE_MAIN|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
439 "#pragma omp parallel for\n"
440 "for(i = 0; i < 0; i++) {};\n"
442 "-Werror -fopenmp" },
443 { "HAVE_VALGRIND_MEMCHECK_H", "<valgrind/memcheck.h>",
444 "OUTSIDE_MAIN", NULL, NULL,
445 "#include <valgrind/memcheck.h>\n" },
446 { "HAVE_UCONTEXT", "working <ucontext.h",
447 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
449 "#include <ucontext.h>\n"
450 "static int x = 0;\n"
451 "static char stack[2048];\n"
452 "static ucontext_t a, b;\n"
453 "static void fn(void) {\n"
461 " a.uc_stack.ss_sp = stack;\n"
462 " a.uc_stack.ss_size = sizeof(stack);\n"
463 " makecontext(&a, fn, 0);\n"
464 " swapcontext(&b, &a);\n"
465 " return (x == 3) ? 0 : 1;\n"
468 { "HAVE_POINTER_SAFE_MAKECONTEXT", "passing pointers via makecontext()",
469 "DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
470 "HAVE_UCONTEXT", NULL,
471 "#include <stddef.h>\n"
472 "#include <ucontext.h>\n"
473 "static int worked = 0;\n"
474 "static char stack[1024];\n"
475 "static ucontext_t a, b;\n"
476 "static void fn(void *p, void *q) {\n"
477 " void *cp = &worked;\n"
478 " void *cq = (void *)(~((ptrdiff_t)cp));\n"
479 " if ((p == cp) && (q == cq))\n"
484 " void *ap = &worked;\n"
485 " void *aq = (void *)(~((ptrdiff_t)ap));\n"
487 " a.uc_stack.ss_sp = stack;\n"
488 " a.uc_stack.ss_size = sizeof(stack);\n"
489 " makecontext(&a, (void (*)(void))fn, 2, ap, aq);\n"
490 " swapcontext(&b, &a);\n"
491 " return worked ? 0 : 1;\n"
494 { "HAVE_BUILTIN_CPU_SUPPORTS", "__builtin_cpu_supports()",
495 "DEFINES_FUNC", NULL, NULL,
496 "#include <stdbool.h>\n"
497 "static bool func(void) {\n"
498 " return __builtin_cpu_supports(\"mmx\");\n"
501 { "HAVE_CLOSEFROM", "closefrom() offered by system",
502 "DEFINES_EVERYTHING", NULL, NULL,
503 "#include <stdlib.h>\n"
504 "#include <unistd.h>\n"
506 " closefrom(STDERR_FILENO + 1);\n"
510 { "HAVE_F_CLOSEM", "F_CLOSEM defined for fctnl.",
511 "DEFINES_EVERYTHING", NULL, NULL,
512 "#include <fcntl.h>\n"
513 "#include <unistd.h>\n"
515 " int res = fcntl(STDERR_FILENO + 1, F_CLOSEM, 0);\n"
519 { "HAVE_NR_CLOSE_RANGE", "close_range syscall available as __NR_close_range.",
520 "DEFINES_EVERYTHING", NULL, NULL,
521 "#include <limits.h>\n"
522 "#include <sys/syscall.h>\n"
523 "#include <unistd.h>\n"
525 " int res = syscall(__NR_close_range, STDERR_FILENO + 1, INT_MAX, 0);\n"
529 { "HAVE_F_MAXFD", "F_MAXFD defined for fcntl.",
530 "DEFINES_EVERYTHING", NULL, NULL,
531 "#include <fcntl.h>\n"
532 "#include <unistd.h>\n"
534 " int res = fcntl(0, F_MAXFD);\n"
540 static void c12r_err(int eval, const char *fmt, ...)
542 int err_errno = errno;
545 fprintf(stderr, "%s: ", progname);
547 vfprintf(stderr, fmt, ap);
549 fprintf(stderr, ": %s\n", strerror(err_errno));
553 static void c12r_errx(int eval, const char *fmt, ...)
557 fprintf(stderr, "%s: ", progname);
559 vfprintf(stderr, fmt, ap);
561 fprintf(stderr, "\n");
565 static void start_test(const char *what, const char *why)
567 if (like_a_libtool) {
568 printf("%s%s... ", what, why);
573 static void end_test(bool result)
576 printf("%s\n", result ? "yes" : "no");
579 static size_t fcopy(FILE *fsrc, FILE *fdst)
585 while ((rsize = fread(buffer, 1, BUFSIZ, fsrc)) > 0) {
586 wsize = fwrite(buffer, 1, rsize, fdst);
595 static char *grab_stream(FILE *file)
597 size_t max, ret, size = 0;
601 buffer = malloc(max);
602 while ((ret = fread(buffer+size, 1, max - size, file)) == max - size) {
604 buffer = realloc(buffer, max *= 2);
608 c12r_err(EXIT_TROUBLE_RUNNING, "reading from command");
613 static char *run(const char *cmd, int *exitstatus)
615 static const char redir[] = " 2>&1";
621 cmdlen = strlen(cmd);
622 cmdredir = malloc(cmdlen + sizeof(redir));
623 memcpy(cmdredir, cmd, cmdlen);
624 memcpy(cmdredir + cmdlen, redir, sizeof(redir));
626 cmdout = popen(cmdredir, "r");
628 c12r_err(EXIT_TROUBLE_RUNNING, "popen \"%s\"", cmdredir);
632 ret = grab_stream(cmdout);
633 *exitstatus = pclose(cmdout);
637 static char *connect_args(const char *argv[], const char *outflag,
642 size_t len = strlen(outflag) + strlen(files) + 1;
644 for (i = 1; argv[i]; i++)
645 len += 1 + strlen(argv[i]);
649 for (i = 1; argv[i]; i++) {
650 strcpy(ret + len, argv[i]);
651 len += strlen(argv[i]);
652 if (argv[i+1] || *outflag)
655 strcpy(ret + len, outflag);
656 len += strlen(outflag);
657 strcpy(ret + len, files);
661 static struct test *find_test(const char *name)
665 for (i = 0; tests[i].name; i++) {
666 if (strcmp(tests[i].name, name) == 0)
669 c12r_errx(EXIT_BAD_TEST, "Unknown test %s", name);
673 #define PRE_BOILERPLATE "/* Test program generated by configurator. */\n"
674 #define MAIN_START_BOILERPLATE \
675 "int main(int argc, char *argv[]) {\n" \
678 #define USE_FUNC_BOILERPLATE "(void)func;\n"
679 #define MAIN_BODY_BOILERPLATE "return 0;\n"
680 #define MAIN_END_BOILERPLATE "}\n"
682 static bool run_test(const char *cmd, const char *wrapper, struct test *test)
684 char *output, *newcmd;
693 const char *deps = test->depends;
696 /* Space-separated dependencies, could be ! for inverse. */
697 while ((len = strcspn(deps, " ")) != 0) {
698 bool positive = true;
710 if (run_test(cmd, wrapper, find_test(dep)) != positive) {
711 test->answer = false;
719 deps += strspn(deps, " ");
723 outf = fopen(INPUT_FILE, verbose > 1 ? "w+" : "w");
725 c12r_err(EXIT_TROUBLE_RUNNING, "creating %s", INPUT_FILE);
727 fprintf(outf, "%s", PRE_BOILERPLATE);
729 if (strstr(test->style, "INSIDE_MAIN")) {
730 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
731 fprintf(outf, "%s", test->fragment);
732 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
733 } else if (strstr(test->style, "OUTSIDE_MAIN")) {
734 fprintf(outf, "%s", test->fragment);
735 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
736 fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
737 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
738 } else if (strstr(test->style, "DEFINES_FUNC")) {
739 fprintf(outf, "%s", test->fragment);
740 fprintf(outf, "%s", MAIN_START_BOILERPLATE);
741 fprintf(outf, "%s", USE_FUNC_BOILERPLATE);
742 fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
743 fprintf(outf, "%s", MAIN_END_BOILERPLATE);
744 } else if (strstr(test->style, "DEFINES_EVERYTHING")) {
745 fprintf(outf, "%s", test->fragment);
747 c12r_errx(EXIT_BAD_TEST, "Unknown style for test %s: %s",
748 test->name, test->style);
751 fseek(outf, 0, SEEK_SET);
757 newcmd = strdup(cmd);
760 newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
761 + strlen(test->flags) + 1);
763 strcat(newcmd, test->flags);
765 printf("Extra flags line: %s", newcmd);
769 newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
770 + strlen(test->link) + 1);
772 strcat(newcmd, test->link);
774 printf("Extra link line: %s", newcmd);
777 start_test("checking for ", test->desc);
778 output = run(newcmd, &status);
782 if (status != 0 || strstr(output, "warning")) {
784 printf("Compile %s for %s, status %i: %s\n",
785 status ? "fail" : "warning",
786 test->name, status, output);
787 if (strstr(test->style, "EXECUTE")
788 && !strstr(test->style, "MAY_NOT_COMPILE"))
789 c12r_errx(EXIT_BAD_TEST,
790 "Test for %s did not compile:\n%s",
792 test->answer = false;
795 /* Compile succeeded. */
797 /* We run INSIDE_MAIN tests for sanity checking. */
798 if (strstr(test->style, "EXECUTE")
799 || strstr(test->style, "INSIDE_MAIN")) {
800 char *runcmd = malloc(strlen(wrapper) + strlen(" ." DIR_SEP OUTPUT_FILE) + 1);
802 strcpy(runcmd, wrapper);
803 strcat(runcmd, " ." DIR_SEP OUTPUT_FILE);
804 output = run(runcmd, &status);
806 if (!strstr(test->style, "EXECUTE") && status != 0)
807 c12r_errx(EXIT_BAD_TEST,
808 "Test for %s failed with %i:\n%s",
809 test->name, status, output);
810 if (verbose && status)
811 printf("%s exited %i\n", test->name, status);
814 test->answer = (status == 0);
817 end_test(test->answer);
819 if (test->answer && test->overrides) {
820 struct test *override = find_test(test->overrides);
821 override->done = true;
822 override->answer = true;
827 static char *any_field(char **fieldname)
833 if (!fgets(buf, sizeof(buf), stdin))
837 /* Ignore whitespace, lines starting with # */
838 while (*p == ' ' || *p == '\t')
840 if (*p == '#' || *p == '\n')
845 c12r_errx(EXIT_BAD_INPUT, "no = in line: %s", p);
847 *fieldname = strdup(p);
849 if (strlen(p) && p[strlen(p)-1] == '\n')
850 p[strlen(p)-1] = '\0';
855 static char *read_field(const char *name, bool compulsory)
857 char *fieldname, *value;
859 value = any_field(&fieldname);
863 c12r_errx(EXIT_BAD_INPUT, "Could not read field %s", name);
865 if (strcmp(fieldname, name) != 0)
866 c12r_errx(EXIT_BAD_INPUT,
867 "Expected field %s not %s", name, fieldname);
871 /* Test descriptions from stdin:
872 * Lines starting with # or whitespace-only are ignored.
874 * First three non-ignored lines must be:
876 * desc=<description-for-autotools-style>
877 * style=OUTSIDE_MAIN DEFINES_FUNC INSIDE_MAIN DEFINES_EVERYTHING EXECUTE MAY_NOT_COMPILE
879 * Followed by optional lines:
880 * depends=<space-separated-testnames, ! to invert>
881 * link=<extra args for link line>
882 * flags=<extra args for compile line>
883 * overrides=<testname-to-force>
885 * Finally a code line, either:
891 * And <end-comment> looks like this next comment: */
893 static bool read_test(struct test *test)
898 memset(test, 0, sizeof(*test));
899 test->name = read_field("var", false);
902 test->desc = read_field("desc", true);
903 test->style = read_field("style", true);
904 /* Read any optional fields. */
905 while ((value = any_field(&field)) != NULL) {
906 if (strcmp(field, "depends") == 0)
907 test->depends = value;
908 else if (strcmp(field, "link") == 0)
910 else if (strcmp(field, "flags") == 0)
912 else if (strcmp(field, "overrides") == 0)
913 test->overrides = value;
914 else if (strcmp(field, "code") == 0)
917 c12r_errx(EXIT_BAD_INPUT, "Unknown field %s in %s",
921 c12r_errx(EXIT_BAD_INPUT, "Missing code in %s", test->name);
923 if (strlen(value) == 0) {
924 /* Multiline program, read to END comment */
925 while (fgets(buf, sizeof(buf), stdin) != 0) {
927 if (strncmp(buf, "/*END*/", 7) == 0)
930 value = realloc(value, n + strlen(buf) + 1);
931 strcpy(value + n, buf);
935 test->fragment = value;
939 static void read_tests(size_t num_tests)
941 while (read_test(tests + num_tests)) {
943 tests = realloc(tests, (num_tests + 1) * sizeof(tests[0]));
944 tests[num_tests].name = NULL;
948 int main(int argc, const char *argv[])
952 const char *default_args[]
953 = { "", DEFAULT_COMPILER, DEFAULT_FLAGS, NULL };
954 const char *outflag = DEFAULT_OUTPUT_EXE_FLAG;
955 const char *configurator_cc = NULL;
956 const char *wrapper = "";
958 const char *varfile = NULL;
959 const char *headerfile = NULL;
960 bool extra_tests = false;
967 if (strcmp(argv[1], "--help") == 0) {
968 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"
969 " <compiler> <flags> will have \"<outflag> <outfile> <infile.c>\" appended\n"
970 "Default: %s %s %s\n",
971 DEFAULT_COMPILER, DEFAULT_FLAGS,
972 DEFAULT_OUTPUT_EXE_FLAG);
975 if (strncmp(argv[1], "-O", 2) == 0) {
978 outflag = argv[1] + 2;
981 "%s: option requires an argument -- O\n",
983 exit(EXIT_BAD_USAGE);
985 } else if (strcmp(argv[1], "-v") == 0) {
989 } else if (strcmp(argv[1], "-vv") == 0) {
993 } else if (strncmp(argv[1], "--configurator-cc=", 18) == 0) {
994 configurator_cc = argv[1] + 18;
997 } else if (strncmp(argv[1], "--wrapper=", 10) == 0) {
998 wrapper = argv[1] + 10;
1001 } else if (strncmp(argv[1], "--var-file=", 11) == 0) {
1002 varfile = argv[1] + 11;
1005 } else if (strcmp(argv[1], "--autotools-style") == 0) {
1006 like_a_libtool = true;
1009 } else if (strncmp(argv[1], "--header-file=", 14) == 0) {
1010 headerfile = argv[1] + 14;
1013 } else if (strcmp(argv[1], "--extra-tests") == 0) {
1017 } else if (strcmp(argv[1], "--") == 0) {
1019 } else if (argv[1][0] == '-') {
1020 c12r_errx(EXIT_BAD_USAGE, "Unknown option %s", argv[1]);
1027 argv = default_args;
1029 /* Copy with NULL entry at end */
1030 tests = calloc(sizeof(base_tests)/sizeof(base_tests[0]) + 1,
1031 sizeof(base_tests[0]));
1032 memcpy(tests, base_tests, sizeof(base_tests));
1035 read_tests(sizeof(base_tests)/sizeof(base_tests[0]));
1038 if (configurator_cc)
1039 argv[1] = configurator_cc;
1041 cmd = connect_args(argv, outflag, OUTPUT_FILE " " INPUT_FILE);
1042 if (like_a_libtool) {
1043 start_test("Making autoconf users comfortable", "");
1047 for (i = 0; tests[i].name; i++)
1048 run_test(cmd, wrapper, &tests[i]);
1051 remove(OUTPUT_FILE);
1057 if (strcmp(varfile, "-") == 0)
1060 start_test("Writing variables to ", varfile);
1061 vars = fopen(varfile, "a");
1063 c12r_err(EXIT_TROUBLE_RUNNING,
1064 "Could not open %s", varfile);
1066 for (i = 0; tests[i].name; i++)
1067 fprintf(vars, "%s=%u\n", tests[i].name, tests[i].answer);
1068 if (vars != stdout) {
1069 if (fclose(vars) != 0)
1070 c12r_err(EXIT_TROUBLE_RUNNING,
1071 "Closing %s", varfile);
1077 start_test("Writing header to ", headerfile);
1078 outf = fopen(headerfile, "w");
1080 c12r_err(EXIT_TROUBLE_RUNNING,
1081 "Could not open %s", headerfile);
1085 fprintf(outf, "/* Generated by CCAN configurator */\n"
1086 "#ifndef CCAN_CONFIG_H\n"
1087 "#define CCAN_CONFIG_H\n");
1088 fprintf(outf, "#ifndef _GNU_SOURCE\n");
1089 fprintf(outf, "#define _GNU_SOURCE /* Always use GNU extensions. */\n");
1090 fprintf(outf, "#endif\n");
1091 fprintf(outf, "#define CCAN_COMPILER \"%s\"\n", orig_cc);
1092 cmd = connect_args(argv + 1, "", "");
1093 fprintf(outf, "#define CCAN_CFLAGS \"%s\"\n", cmd);
1095 fprintf(outf, "#define CCAN_OUTPUT_EXE_CFLAG \"%s\"\n\n", outflag);
1096 /* This one implies "#include <ccan/..." works, eg. for tdb2.h */
1097 fprintf(outf, "#define HAVE_CCAN 1\n");
1098 for (i = 0; tests[i].name; i++)
1099 fprintf(outf, "#define %s %u\n", tests[i].name, tests[i].answer);
1100 fprintf(outf, "#endif /* CCAN_CONFIG_H */\n");
1103 if (fclose(outf) != 0)
1104 c12r_err(EXIT_TROUBLE_RUNNING, "Closing %s", headerfile);