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configurator.c
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configurator.c
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/* Simple tool to create config.h.
* Would be much easier with ccan modules, but deliberately standalone.
*
* Copyright 2011 Rusty Russell <rusty@rustcorp.com.au>. MIT license.
*
* c12r_err, c12r_errx functions copied from ccan/err/err.c
* Copyright Rusty Russell <rusty@rustcorp.com.au>. CC0 (Public domain) License.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#define _POSIX_C_SOURCE 200809L /* For pclose, popen, strdup */
#define EXIT_BAD_USAGE 1
#define EXIT_TROUBLE_RUNNING 2
#define EXIT_BAD_TEST 3
#define EXIT_BAD_INPUT 4
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef _MSC_VER
#define popen _popen
#define pclose _pclose
#endif
#ifdef _MSC_VER
#define DEFAULT_COMPILER "cl"
/* Note: Dash options avoid POSIX path conversion when used under msys bash
* and are therefore preferred to slash (e.g. -nologo over /nologo)
* Note: Disable Warning 4200 "nonstandard extension used : zero-sized array
* in struct/union" for flexible array members.
*/
#define DEFAULT_FLAGS "-nologo -Zi -W4 -wd4200 " \
"-D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS"
#define DEFAULT_OUTPUT_EXE_FLAG "-Fe:"
#else
#define DEFAULT_COMPILER "cc"
#define DEFAULT_FLAGS "-g3 -ggdb -Wall -Wundef -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes -Wold-style-definition"
#define DEFAULT_OUTPUT_EXE_FLAG "-o"
#endif
#define OUTPUT_FILE "configurator.out"
#define INPUT_FILE "configuratortest.c"
#ifdef _WIN32
#define DIR_SEP "\\"
#else
#define DIR_SEP "/"
#endif
static const char *progname = "";
static int verbose;
static bool like_a_libtool = false;
struct test {
const char *name;
const char *desc;
/*
* Template style flags (pick one):
* OUTSIDE_MAIN:
* - put a simple boilerplate main below it.
* DEFINES_FUNC:
* - defines a static function called func; adds ref to avoid warnings
* INSIDE_MAIN:
* - put this inside main().
* DEFINES_EVERYTHING:
* - don't add any boilerplate at all.
*
* Execution flags:
* EXECUTE:
* - a runtime test; must compile, exit 0 means flag is set.
* MAY_NOT_COMPILE:
* - Only useful with EXECUTE: don't get upset if it doesn't compile.
* <nothing>:
* - a compile test, if it compiles must run and exit 0.
*/
const char *style;
const char *depends;
const char *link;
const char *fragment;
const char *flags;
const char *overrides; /* On success, force this to '1' */
bool done;
bool answer;
};
/* Terminated by a NULL name */
static struct test *tests;
static const struct test base_tests[] = {
{ "HAVE_UNALIGNED_ACCESS", "unaligned access to int",
"DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
"#include <string.h>\n"
"int main(int argc, char *argv[]) {\n"
" (void)argc;\n"
" char pad[sizeof(int *) * 1];\n"
" memcpy(pad, argv[0], sizeof(pad));\n"
" int *x = (int *)pad, *y = (int *)(pad + 1);\n"
" return *x == *y;\n"
"}\n" },
{ "HAVE_TYPEOF", "__typeof__ support",
"INSIDE_MAIN", NULL, NULL,
"__typeof__(argc) i; i = argc; return i == argc ? 0 : 1;" },
{ "HAVE_BIG_ENDIAN", "big endian",
"INSIDE_MAIN|EXECUTE", NULL, NULL,
"union { int i; char c[sizeof(int)]; } u;\n"
"u.i = 0x01020304;\n"
"return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;" },
{ "HAVE_BYTESWAP_H", "<byteswap.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <byteswap.h>\n" },
{ "HAVE_BSWAP_64", "bswap64 in byteswap.h",
"DEFINES_FUNC", "HAVE_BYTESWAP_H", NULL,
"#include <byteswap.h>\n"
"static int func(int x) { return bswap_64(x); }" },
{ "HAVE_LITTLE_ENDIAN", "little endian",
"INSIDE_MAIN|EXECUTE", NULL, NULL,
"union { int i; char c[sizeof(int)]; } u;\n"
"u.i = 0x01020304;\n"
"return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;" },
/*
{ "HAVE_32BIT_OFF_T", "off_t is 32 bits",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#include <sys/types.h>\n"
"int main(void) {\n"
" return sizeof(off_t) == 4 ? 0 : 1;\n"
"}\n" },
{ "HAVE_ALIGNOF", "__alignof__ support",
"INSIDE_MAIN", NULL, NULL,
"return __alignof__(double) > 0 ? 0 : 1;" },
{ "HAVE_ASPRINTF", "asprintf() declaration",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
"#include <stdio.h>\n"
"static char *func(int x) {"
" char *p;\n"
" if (asprintf(&p, \"%u\", x) == -1) \n"
" p = NULL;\n"
" return p;\n"
"}" },
{ "HAVE_ATTRIBUTE_COLD", "__attribute__((cold)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((cold)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_CONST", "__attribute__((const)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((const)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_DEPRECATED", "__attribute__((deprecated)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((deprecated)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_NONNULL", "__attribute__((nonnull)) support",
"DEFINES_FUNC", NULL, NULL,
"static char *__attribute__((nonnull)) func(char *p) { return p; }" },
{ "HAVE_ATTRIBUTE_RETURNS_NONNULL", "__attribute__((returns_nonnull)) support",
"DEFINES_FUNC", NULL, NULL,
"static const char *__attribute__((returns_nonnull)) func(void) { return \"hi\"; }" },
{ "HAVE_ATTRIBUTE_SENTINEL", "__attribute__((sentinel)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((sentinel)) func(int i, ...) { return i; }" },
{ "HAVE_ATTRIBUTE_PURE", "__attribute__((pure)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((pure)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_MAY_ALIAS", "__attribute__((may_alias)) support",
"OUTSIDE_MAIN", NULL, NULL,
"typedef short __attribute__((__may_alias__)) short_a;" },
{ "HAVE_ATTRIBUTE_NORETURN", "__attribute__((noreturn)) support",
"DEFINES_FUNC", NULL, NULL,
"#include <stdlib.h>\n"
"static void __attribute__((noreturn)) func(int x) { exit(x); }" },
{ "HAVE_ATTRIBUTE_PRINTF", "__attribute__ format printf support",
"DEFINES_FUNC", NULL, NULL,
"static void __attribute__((format(__printf__, 1, 2))) func(const char *fmt, ...) { (void)fmt; }" },
{ "HAVE_ATTRIBUTE_UNUSED", "__attribute__((unused)) support",
"OUTSIDE_MAIN", NULL, NULL,
"static int __attribute__((unused)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_USED", "__attribute__((used)) support",
"OUTSIDE_MAIN", NULL, NULL,
"static int __attribute__((used)) func(int x) { return x; }" },
{ "HAVE_BACKTRACE", "backtrace() in <execinfo.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <execinfo.h>\n"
"static int func(int x) {"
" void *bt[10];\n"
" return backtrace(bt, 10) < x;\n"
"}" },
{ "HAVE_BUILTIN_CHOOSE_EXPR", "__builtin_choose_expr support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_choose_expr(1, 0, \"garbage\");" },
{ "HAVE_BUILTIN_CLZ", "__builtin_clz support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CLZL", "__builtin_clzl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_clzl(1) == (sizeof(long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CLZLL", "__builtin_clzll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_clzll(1) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CTZ", "__builtin_ctz support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ctz(1 << (sizeof(int)*8 - 1)) == (sizeof(int)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CTZL", "__builtin_ctzl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ctzl(1UL << (sizeof(long)*8 - 1)) == (sizeof(long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CTZLL", "__builtin_ctzll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ctzll(1ULL << (sizeof(long long)*8 - 1)) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CONSTANT_P", "__builtin_constant_p support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_constant_p(1) ? 0 : 1;" },
{ "HAVE_BUILTIN_EXPECT", "__builtin_expect support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_expect(argc == 1, 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_FFS", "__builtin_ffs support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ffs(0) == 0 ? 0 : 1;" },
{ "HAVE_BUILTIN_FFSL", "__builtin_ffsl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ffsl(0L) == 0 ? 0 : 1;" },
{ "HAVE_BUILTIN_FFSLL", "__builtin_ffsll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ffsll(0LL) == 0 ? 0 : 1;" },
{ "HAVE_BUILTIN_POPCOUNT", "__builtin_popcount support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_popcount(255) == 8 ? 0 : 1;" },
{ "HAVE_BUILTIN_POPCOUNTL", "__builtin_popcountl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_popcountl(255L) == 8 ? 0 : 1;" },
{ "HAVE_BUILTIN_POPCOUNTLL", "__builtin_popcountll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_popcountll(255LL) == 8 ? 0 : 1;" },
{ "HAVE_BUILTIN_TYPES_COMPATIBLE_P", "__builtin_types_compatible_p support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_types_compatible_p(char *, int) ? 1 : 0;" },
{ "HAVE_ICCARM_INTRINSICS", "<intrinsics.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <intrinsics.h>\n"
"int func(int v) {\n"
" return __CLZ(__RBIT(v));\n"
"}" },
{ "HAVE_CLOCK_GETTIME", "clock_gettime() declaration",
"DEFINES_FUNC", "HAVE_STRUCT_TIMESPEC", NULL,
"#include <time.h>\n"
"static struct timespec func(void) {\n"
" struct timespec ts;\n"
" clock_gettime(CLOCK_REALTIME, &ts);\n"
" return ts;\n"
"}\n" },
{ "HAVE_CLOCK_GETTIME_IN_LIBRT", "clock_gettime() in librt",
"DEFINES_FUNC",
"HAVE_STRUCT_TIMESPEC !HAVE_CLOCK_GETTIME",
"-lrt",
"#include <time.h>\n"
"static struct timespec func(void) {\n"
" struct timespec ts;\n"
" clock_gettime(CLOCK_REALTIME, &ts);\n"
" return ts;\n"
"}\n",
"HAVE_CLOCK_GETTIME" },
{ "HAVE_COMPOUND_LITERALS", "compound literal support",
"INSIDE_MAIN", NULL, NULL,
"int *foo = (int[]) { 1, 2, 3, 4 };\n"
"return foo[0] ? 0 : 1;" },
{ "HAVE_FCHDIR", "fchdir support",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#include <sys/types.h>\n"
"#include <sys/stat.h>\n"
"#include <fcntl.h>\n"
"#include <unistd.h>\n"
"int main(void) {\n"
" int fd = open(\"..\", O_RDONLY);\n"
" return fchdir(fd) == 0 ? 0 : 1;\n"
"}\n" },
{ "HAVE_ERR_H", "<err.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <err.h>\n"
"static void func(int arg) {\n"
" if (arg == 0)\n"
" err(1, \"err %u\", arg);\n"
" if (arg == 1)\n"
" errx(1, \"err %u\", arg);\n"
" if (arg == 3)\n"
" warn(\"warn %u\", arg);\n"
" if (arg == 4)\n"
" warnx(\"warn %u\", arg);\n"
"}\n" },
{ "HAVE_FILE_OFFSET_BITS", "_FILE_OFFSET_BITS to get 64-bit offsets",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
"HAVE_32BIT_OFF_T", NULL,
"#define _FILE_OFFSET_BITS 64\n"
"#include <sys/types.h>\n"
"int main(void) {\n"
" return sizeof(off_t) == 8 ? 0 : 1;\n"
"}\n" },
{ "HAVE_FOR_LOOP_DECLARATION", "for loop declaration support",
"INSIDE_MAIN", NULL, NULL,
"int ret = 1;\n"
"for (int i = 0; i < argc; i++) { ret = 0; };\n"
"return ret;" },
{ "HAVE_FLEXIBLE_ARRAY_MEMBER", "flexible array member support",
"OUTSIDE_MAIN", NULL, NULL,
"struct foo { unsigned int x; int arr[]; };" },
{ "HAVE_GETPAGESIZE", "getpagesize() in <unistd.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <unistd.h>\n"
"static int func(void) { return getpagesize(); }" },
{ "HAVE_ISBLANK", "isblank() in <ctype.h>",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
"#include <ctype.h>\n"
"static int func(void) { return isblank(' '); }" },
{ "HAVE_MEMMEM", "memmem in <string.h>",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
"#include <string.h>\n"
"static void *func(void *h, size_t hl, void *n, size_t nl) {\n"
"return memmem(h, hl, n, nl);"
"}\n", },
{ "HAVE_MEMRCHR", "memrchr in <string.h>",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
"#include <string.h>\n"
"static void *func(void *s, int c, size_t n) {\n"
"return memrchr(s, c, n);"
"}\n", },
{ "HAVE_MMAP", "mmap() declaration",
"DEFINES_FUNC", NULL, NULL,
"#include <sys/mman.h>\n"
"static void *func(int fd) {\n"
" return mmap(0, 65536, PROT_READ, MAP_SHARED, fd, 0);\n"
"}" },
{ "HAVE_PROC_SELF_MAPS", "/proc/self/maps exists",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#include <sys/types.h>\n"
"#include <sys/stat.h>\n"
"#include <fcntl.h>\n"
"int main(void) {\n"
" return open(\"/proc/self/maps\", O_RDONLY) != -1 ? 0 : 1;\n"
"}\n" },
{ "HAVE_QSORT_R_PRIVATE_LAST", "qsort_r cmp takes trailing arg",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
"#include <stdlib.h>\n"
"static int cmp(const void *lp, const void *rp, void *priv) {\n"
" *(unsigned int *)priv = 1;\n"
" return *(const int *)lp - *(const int *)rp; }\n"
"int main(void) {\n"
" int array[] = { 9, 2, 5 };\n"
" unsigned int called = 0;\n"
" qsort_r(array, 3, sizeof(int), cmp, &called);\n"
" return called && array[0] == 2 && array[1] == 5 && array[2] == 9 ? 0 : 1;\n"
"}\n" },
{ "HAVE_STRUCT_TIMESPEC", "struct timespec declaration",
"DEFINES_FUNC", NULL, NULL,
"#include <time.h>\n"
"static void func(void) {\n"
" struct timespec ts;\n"
" ts.tv_sec = ts.tv_nsec = 1;\n"
"}\n" },
{ "HAVE_SECTION_START_STOP", "__attribute__((section)) and __start/__stop",
"DEFINES_FUNC", NULL, NULL,
"static void *__attribute__((__section__(\"mysec\"))) p = &p;\n"
"static int func(void) {\n"
" extern void *__start_mysec[], *__stop_mysec[];\n"
" return __stop_mysec - __start_mysec;\n"
"}\n" },
{ "HAVE_STACK_GROWS_UPWARDS", "stack grows upwards",
"DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
"#include <stddef.h>\n"
"static ptrdiff_t nest(const void *base, unsigned int i)\n"
"{\n"
" if (i == 0)\n"
" return (const char *)&i - (const char *)base;\n"
" return nest(base, i-1);\n"
"}\n"
"int main(int argc, char *argv[]) {\n"
" (void)argv;\n"
" return (nest(&argc, argc) > 0) ? 0 : 1;\n"
"}\n" },
{ "HAVE_STATEMENT_EXPR", "statement expression support",
"INSIDE_MAIN", NULL, NULL,
"return ({ int x = argc; x == argc ? 0 : 1; });" },
{ "HAVE_SYS_FILIO_H", "<sys/filio.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <sys/filio.h>\n" },
{ "HAVE_SYS_TERMIOS_H", "<sys/termios.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <sys/termios.h>\n" },
{ "HAVE_SYS_UNISTD_H", "<sys/unistd.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <sys/unistd.h>\n" },
{ "HAVE_UTIME", "utime() declaration",
"DEFINES_FUNC", NULL, NULL,
"#include <sys/types.h>\n"
"#include <utime.h>\n"
"static int func(const char *filename) {\n"
" struct utimbuf times = { 0 };\n"
" return utime(filename, ×);\n"
"}" },
{ "HAVE_WARN_UNUSED_RESULT", "__attribute__((warn_unused_result))",
"DEFINES_FUNC", NULL, NULL,
"#include <sys/types.h>\n"
"#include <utime.h>\n"
"static __attribute__((warn_unused_result)) int func(int i) {\n"
" return i + 1;\n"
"}" },
{ "HAVE_OPENMP", "#pragma omp and -fopenmp support",
"INSIDE_MAIN|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"int i;\n"
"#pragma omp parallel for\n"
"for(i = 0; i < 0; i++) {};\n"
"return 0;\n",
"-Werror -fopenmp" },
{ "HAVE_VALGRIND_MEMCHECK_H", "<valgrind/memcheck.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <valgrind/memcheck.h>\n" },
{ "HAVE_UCONTEXT", "working <ucontext.h",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
NULL, NULL,
"#include <ucontext.h>\n"
"static int x = 0;\n"
"static char stack[2048];\n"
"static ucontext_t a, b;\n"
"static void fn(void) {\n"
" x |= 2;\n"
" setcontext(&b);\n"
" x |= 4;\n"
"}\n"
"int main(void) {\n"
" x |= 1;\n"
" getcontext(&a);\n"
" a.uc_stack.ss_sp = stack;\n"
" a.uc_stack.ss_size = sizeof(stack);\n"
" makecontext(&a, fn, 0);\n"
" swapcontext(&b, &a);\n"
" return (x == 3) ? 0 : 1;\n"
"}\n"
},
{ "HAVE_POINTER_SAFE_MAKECONTEXT", "passing pointers via makecontext()",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
"HAVE_UCONTEXT", NULL,
"#include <stddef.h>\n"
"#include <ucontext.h>\n"
"static int worked = 0;\n"
"static char stack[1024];\n"
"static ucontext_t a, b;\n"
"static void fn(void *p, void *q) {\n"
" void *cp = &worked;\n"
" void *cq = (void *)(~((ptrdiff_t)cp));\n"
" if ((p == cp) && (q == cq))\n"
" worked = 1;\n"
" setcontext(&b);\n"
"}\n"
"int main(void) {\n"
" void *ap = &worked;\n"
" void *aq = (void *)(~((ptrdiff_t)ap));\n"
" getcontext(&a);\n"
" a.uc_stack.ss_sp = stack;\n"
" a.uc_stack.ss_size = sizeof(stack);\n"
" makecontext(&a, (void (*)(void))fn, 2, ap, aq);\n"
" swapcontext(&b, &a);\n"
" return worked ? 0 : 1;\n"
"}\n"
},
{ "HAVE_BUILTIN_CPU_SUPPORTS", "__builtin_cpu_supports()",
"DEFINES_FUNC", NULL, NULL,
"#include <stdbool.h>\n"
"static bool func(void) {\n"
" return __builtin_cpu_supports(\"mmx\");\n"
"}"
},
{ "HAVE_CLOSEFROM", "closefrom() offered by system",
"DEFINES_EVERYTHING", NULL, NULL,
"#include <stdlib.h>\n"
"#include <unistd.h>\n"
"int main(void) {\n"
" closefrom(STDERR_FILENO + 1);\n"
" return 0;\n"
"}\n"
},
{ "HAVE_F_CLOSEM", "F_CLOSEM defined for fctnl.",
"DEFINES_EVERYTHING", NULL, NULL,
"#include <fcntl.h>\n"
"#include <unistd.h>\n"
"int main(void) {\n"
" int res = fcntl(STDERR_FILENO + 1, F_CLOSEM, 0);\n"
" return res < 0;\n"
"}\n"
},
{ "HAVE_NR_CLOSE_RANGE", "close_range syscall available as __NR_close_range.",
"DEFINES_EVERYTHING", NULL, NULL,
"#include <limits.h>\n"
"#include <sys/syscall.h>\n"
"#include <unistd.h>\n"
"int main(void) {\n"
" int res = syscall(__NR_close_range, STDERR_FILENO + 1, INT_MAX, 0);\n"
" return res < 0;\n"
"}\n"
},
{ "HAVE_F_MAXFD", "F_MAXFD defined for fcntl.",
"DEFINES_EVERYTHING", NULL, NULL,
"#include <fcntl.h>\n"
"#include <unistd.h>\n"
"int main(void) {\n"
" int res = fcntl(0, F_MAXFD);\n"
" return res < 0;\n"
"}\n"
},
*/
};
static void c12r_err(int eval, const char *fmt, ...)
{
int err_errno = errno;
va_list ap;
fprintf(stderr, "%s: ", progname);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, ": %s\n", strerror(err_errno));
exit(eval);
}
static void c12r_errx(int eval, const char *fmt, ...)
{
va_list ap;
fprintf(stderr, "%s: ", progname);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(eval);
}
static void start_test(const char *what, const char *why)
{
if (like_a_libtool) {
printf("%s%s... ", what, why);
fflush(stdout);
}
}
static void end_test(bool result)
{
if (like_a_libtool)
printf("%s\n", result ? "yes" : "no");
}
static size_t fcopy(FILE *fsrc, FILE *fdst)
{
char buffer[BUFSIZ];
size_t rsize, wsize;
size_t copied = 0;
while ((rsize = fread(buffer, 1, BUFSIZ, fsrc)) > 0) {
wsize = fwrite(buffer, 1, rsize, fdst);
copied += wsize;
if (wsize != rsize)
break;
}
return copied;
}
static char *grab_stream(FILE *file)
{
size_t max, ret, size = 0;
char *buffer;
max = BUFSIZ;
buffer = malloc(max);
while ((ret = fread(buffer+size, 1, max - size, file)) == max - size) {
size += ret;
buffer = realloc(buffer, max *= 2);
}
size += ret;
if (ferror(file))
c12r_err(EXIT_TROUBLE_RUNNING, "reading from command");
buffer[size] = '\0';
return buffer;
}
static char *run(const char *cmd, int *exitstatus)
{
static const char redir[] = " 2>&1";
size_t cmdlen;
char *cmdredir;
FILE *cmdout;
char *ret;
cmdlen = strlen(cmd);
cmdredir = malloc(cmdlen + sizeof(redir));
memcpy(cmdredir, cmd, cmdlen);
memcpy(cmdredir + cmdlen, redir, sizeof(redir));
cmdout = popen(cmdredir, "r");
if (!cmdout)
c12r_err(EXIT_TROUBLE_RUNNING, "popen \"%s\"", cmdredir);
free(cmdredir);
ret = grab_stream(cmdout);
*exitstatus = pclose(cmdout);
return ret;
}
static char *connect_args(const char *argv[], const char *outflag,
const char *files)
{
unsigned int i;
char *ret;
size_t len = strlen(outflag) + strlen(files) + 1;
for (i = 1; argv[i]; i++)
len += 1 + strlen(argv[i]);
ret = malloc(len);
len = 0;
for (i = 1; argv[i]; i++) {
strcpy(ret + len, argv[i]);
len += strlen(argv[i]);
if (argv[i+1] || *outflag)
ret[len++] = ' ';
}
strcpy(ret + len, outflag);
len += strlen(outflag);
strcpy(ret + len, files);
return ret;
}
static struct test *find_test(const char *name)
{
unsigned int i;
for (i = 0; tests[i].name; i++) {
if (strcmp(tests[i].name, name) == 0)
return &tests[i];
}
c12r_errx(EXIT_BAD_TEST, "Unknown test %s", name);
abort();
}
#define PRE_BOILERPLATE "/* Test program generated by configurator. */\n"
#define MAIN_START_BOILERPLATE \
"int main(int argc, char *argv[]) {\n" \
" (void)argc;\n" \
" (void)argv;\n"
#define USE_FUNC_BOILERPLATE "(void)func;\n"
#define MAIN_BODY_BOILERPLATE "return 0;\n"
#define MAIN_END_BOILERPLATE "}\n"
static bool run_test(const char *cmd, const char *wrapper, struct test *test)
{
char *output, *newcmd;
FILE *outf;
int status;
if (test->done)
return test->answer;
if (test->depends) {
size_t len;
const char *deps = test->depends;
char *dep;
/* Space-separated dependencies, could be ! for inverse. */
while ((len = strcspn(deps, " ")) != 0) {
bool positive = true;
if (deps[len]) {
dep = strdup(deps);
dep[len] = '\0';
} else {
dep = (char *)deps;
}
if (dep[0] == '!') {
dep++;
positive = false;
}
if (run_test(cmd, wrapper, find_test(dep)) != positive) {
test->answer = false;
test->done = true;
return test->answer;
}
if (deps[len])
free(dep);
deps += len;
deps += strspn(deps, " ");
}
}
outf = fopen(INPUT_FILE, verbose > 1 ? "w+" : "w");
if (!outf)
c12r_err(EXIT_TROUBLE_RUNNING, "creating %s", INPUT_FILE);
fprintf(outf, "%s", PRE_BOILERPLATE);
if (strstr(test->style, "INSIDE_MAIN")) {
fprintf(outf, "%s", MAIN_START_BOILERPLATE);
fprintf(outf, "%s", test->fragment);
fprintf(outf, "%s", MAIN_END_BOILERPLATE);
} else if (strstr(test->style, "OUTSIDE_MAIN")) {
fprintf(outf, "%s", test->fragment);
fprintf(outf, "%s", MAIN_START_BOILERPLATE);
fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
fprintf(outf, "%s", MAIN_END_BOILERPLATE);
} else if (strstr(test->style, "DEFINES_FUNC")) {
fprintf(outf, "%s", test->fragment);
fprintf(outf, "%s", MAIN_START_BOILERPLATE);
fprintf(outf, "%s", USE_FUNC_BOILERPLATE);
fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
fprintf(outf, "%s", MAIN_END_BOILERPLATE);
} else if (strstr(test->style, "DEFINES_EVERYTHING")) {
fprintf(outf, "%s", test->fragment);
} else
c12r_errx(EXIT_BAD_TEST, "Unknown style for test %s: %s",
test->name, test->style);
if (verbose > 1) {
fseek(outf, 0, SEEK_SET);
fcopy(outf, stdout);
}
fclose(outf);
newcmd = strdup(cmd);
if (test->flags) {
newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
+ strlen(test->flags) + 1);
strcat(newcmd, " ");
strcat(newcmd, test->flags);
if (verbose > 1)
printf("Extra flags line: %s", newcmd);
}
if (test->link) {
newcmd = realloc(newcmd, strlen(newcmd) + strlen(" ")
+ strlen(test->link) + 1);
strcat(newcmd, " ");
strcat(newcmd, test->link);
if (verbose > 1)
printf("Extra link line: %s", newcmd);
}
start_test("checking for ", test->desc);
output = run(newcmd, &status);
free(newcmd);
if (status != 0 || strstr(output, "warning")) {
if (verbose)
printf("Compile %s for %s, status %i: %s\n",
status ? "fail" : "warning",
test->name, status, output);
if (strstr(test->style, "EXECUTE")
&& !strstr(test->style, "MAY_NOT_COMPILE"))
c12r_errx(EXIT_BAD_TEST,
"Test for %s did not compile:\n%s",
test->name, output);
test->answer = false;
free(output);
} else {
/* Compile succeeded. */
free(output);
/* We run INSIDE_MAIN tests for sanity checking. */
if (strstr(test->style, "EXECUTE")
|| strstr(test->style, "INSIDE_MAIN")) {
char *cmd = malloc(strlen(wrapper) + strlen(" ." DIR_SEP OUTPUT_FILE) + 1);
strcpy(cmd, wrapper);
strcat(cmd, " ." DIR_SEP OUTPUT_FILE);
output = run(cmd, &status);
free(cmd);
if (!strstr(test->style, "EXECUTE") && status != 0)
c12r_errx(EXIT_BAD_TEST,
"Test for %s failed with %i:\n%s",
test->name, status, output);
if (verbose && status)
printf("%s exited %i\n", test->name, status);
free(output);
}
test->answer = (status == 0);
}
test->done = true;
end_test(test->answer);
if (test->answer && test->overrides) {
struct test *override = find_test(test->overrides);
override->done = true;
override->answer = true;
}
return test->answer;
}
static char *any_field(char **fieldname)
{
char buf[1000];
for (;;) {
char *p, *eq;
if (!fgets(buf, sizeof(buf), stdin))
return NULL;
p = buf;
/* Ignore whitespace, lines starting with # */
while (*p == ' ' || *p == '\t')
p++;
if (*p == '#' || *p == '\n')
continue;
eq = strchr(p, '=');
if (!eq)
c12r_errx(EXIT_BAD_INPUT, "no = in line: %s", p);
*eq = '\0';
*fieldname = strdup(p);
p = eq + 1;
if (strlen(p) && p[strlen(p)-1] == '\n')
p[strlen(p)-1] = '\0';
return strdup(p);
}
}
static char *read_field(const char *name, bool compulsory)
{
char *fieldname, *value;
value = any_field(&fieldname);
if (!value) {
if (!compulsory)
return NULL;
c12r_errx(EXIT_BAD_INPUT, "Could not read field %s", name);
}
if (strcmp(fieldname, name) != 0)
c12r_errx(EXIT_BAD_INPUT,
"Expected field %s not %s", name, fieldname);
return value;
}
/* Test descriptions from stdin:
* Lines starting with # or whitespace-only are ignored.
*
* First three non-ignored lines must be:
* var=<varname>
* desc=<description-for-autotools-style>
* style=OUTSIDE_MAIN DEFINES_FUNC INSIDE_MAIN DEFINES_EVERYTHING EXECUTE MAY_NOT_COMPILE
*
* Followed by optional lines:
* depends=<space-separated-testnames, ! to invert>
* link=<extra args for link line>
* flags=<extra args for compile line>
* overrides=<testname-to-force>
*
* Finally a code line, either:
* code=<oneline> OR
* code=
* <lines of code>
* <end-comment>
*
* And <end-comment> looks like this next comment: */
/*END*/
static bool read_test(struct test *test)
{
char *field, *value;
char buf[1000];
memset(test, 0, sizeof(*test));
test->name = read_field("var", false);
if (!test->name)
return false;
test->desc = read_field("desc", true);
test->style = read_field("style", true);
/* Read any optional fields. */
while ((value = any_field(&field)) != NULL) {
if (strcmp(field, "depends") == 0)
test->depends = value;
else if (strcmp(field, "link") == 0)
test->link = value;
else if (strcmp(field, "flags") == 0)
test->flags = value;
else if (strcmp(field, "overrides") == 0)
test->overrides = value;
else if (strcmp(field, "code") == 0)
break;
else
c12r_errx(EXIT_BAD_INPUT, "Unknown field %s in %s",
field, test->name);
}
if (!value)
c12r_errx(EXIT_BAD_INPUT, "Missing code in %s", test->name);
if (strlen(value) == 0) {
/* Multiline program, read to END comment */
while (fgets(buf, sizeof(buf), stdin) != 0) {
size_t n;
if (strncmp(buf, "/*END*/", 7) == 0)
break;
n = strlen(value);
value = realloc(value, n + strlen(buf) + 1);
strcpy(value + n, buf);
n += strlen(buf);
}
}
test->fragment = value;
return true;
}
static void read_tests(size_t num_tests)
{
while (read_test(tests + num_tests)) {
num_tests++;
tests = realloc(tests, (num_tests + 1) * sizeof(tests[0]));
tests[num_tests].name = NULL;
}
}
int main(int argc, const char *argv[])
{
char *cmd;
unsigned int i;
const char *default_args[]
= { "", DEFAULT_COMPILER, DEFAULT_FLAGS, NULL };
const char *outflag = DEFAULT_OUTPUT_EXE_FLAG;
const char *configurator_cc = NULL;
const char *wrapper = "";
const char *orig_cc;
const char *varfile = NULL;
const char *headerfile = NULL;
bool extra_tests = false;
FILE *outf;
if (argc > 0)
progname = argv[0];
while (argc > 1) {
if (strcmp(argv[1], "--help") == 0) {
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"
" <compiler> <flags> will have \"<outflag> <outfile> <infile.c>\" appended\n"
"Default: %s %s %s\n",
DEFAULT_COMPILER, DEFAULT_FLAGS,
DEFAULT_OUTPUT_EXE_FLAG);
exit(0);
}
if (strncmp(argv[1], "-O", 2) == 0) {
argc--;
argv++;
outflag = argv[1] + 2;
if (!*outflag) {
fprintf(stderr,
"%s: option requires an argument -- O\n",
argv[0]);
exit(EXIT_BAD_USAGE);
}
} else if (strcmp(argv[1], "-v") == 0) {
argc--;
argv++;
verbose++;
} else if (strcmp(argv[1], "-vv") == 0) {
argc--;
argv++;
verbose += 2;
} else if (strncmp(argv[1], "--configurator-cc=", 18) == 0) {
configurator_cc = argv[1] + 18;
argc--;
argv++;
} else if (strncmp(argv[1], "--wrapper=", 10) == 0) {
wrapper = argv[1] + 10;
argc--;