+ { "HAVE_PROC_SELF_MAPS", 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",
+ 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",
+ 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",
+ 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", 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", INSIDE_MAIN, NULL, NULL,