See https://www.geeksforgeeks.org/inline-function-in-c/ for various solutions.
Thanks. On Fri, Mar 14, 2025 at 6:53 PM Kenneth Wolcott <kennethwolc...@gmail.com> wrote: > Hi; > > Problem: Undefined symbols for architecture arm64 > > MacOS Sequoia (arm64). Ports are up-to-date. > > I was compiling a C example of a Rosetta Code task recently.. > > https://rosettacode.org/wiki/Vampire_number#C > > Here's my clang error(s): > clang -lm -o ./vampire_number ./vampire_number.c > Undefined symbols for architecture arm64: > "_dtally", referenced from: > _fangs in vampire_number-2cd7e6.o > _fangs in vampire_number-2cd7e6.o > _fangs in vampire_number-2cd7e6.o > "_max", referenced from: > _fangs in vampire_number-2cd7e6.o > "_min", referenced from: > _fangs in vampire_number-2cd7e6.o > "_ndigits", referenced from: > _fangs in vampire_number-2cd7e6.o > ld: symbol(s) not found for architecture arm64 > clang: error: linker command failed with exit code 1 (use -v to see > invocation) > > Here's my gcc errors: > /opt/local/bin/gcc-mp-14 -lm-o ./vampire_number ./vampire_number.c > Undefined symbols for architecture arm64: > "_dtally", referenced from: > _fangs in ccjmm7mz.o > _fangs in ccjmm7mz.o > _fangs in ccjmm7mz.o > "_max", referenced from: > _fangs in ccjmm7mz.o > "_min", referenced from: > _fangs in ccjmm7mz.o > "_ndigits", referenced from: > _fangs in ccjmm7mz.o > ld: symbol(s) not found for architecture arm64 > collect2: error: ld returned 1 exit status > > Here's the source I was trying to compile: > > #include <stdio.h>#include <stdlib.h>#include <stdint.h>#include <math.h> > typedef uint64_t xint;typedef unsigned long long ull; > xint tens[20]; > inline xint max(xint a, xint b) { return a > b ? a : b; }inline xint min(xint > a, xint b) { return a < b ? a : b; }inline int ndigits(xint x){ int n = 0; > while (x) n++, x /= 10; return n;} > inline xint dtally(xint x){ xint t = 0; while (x) t += 1<<((x%10) * 6), > x /= 10; > return t;} > int fangs(xint x, xint *f){ int n = 0; int nd = ndigits(x); if (nd > & 1) return 0; nd /= 2; > xint lo, hi; lo = max(tens[nd-1], (x + tens[nd] - 2)/ (tens[nd] - > 1)); hi = min(x / lo, sqrt(x)); > xint a, b, t = dtally(x); for (a = lo; a <= hi; a++) { > b = x / a; if (a * b == x && ((a%10) || (b%10)) && t == > dtally(a) + dtally(b)) f[n++] = a; } > return n;} > void show_fangs(xint x, xint *f, xint cnt){ printf("%llu", (ull)x); int i; > for (i = 0; i < cnt; i++) printf(" = %llu x %llu", (ull)f[i], > (ull)(x / f[i])); putchar('\n');} > int main(void){ int i, j, n; xint x, f[16], bigs[] = > {16758243290880ULL, 24959017348650ULL, 14593825548650ULL, 0}; > tens[0] = 1; for (i = 1; i < 20; i++) tens[i] = > tens[i-1] * 10; > for (x = 1, n = 0; n < 25; x++) { if (!(j = fangs(x, f))) > continue; printf("%2d: ", ++n); show_fangs(x, f, j); > } > putchar('\n'); for (i = 0; bigs[i]; i++) { if ((j = > fangs(bigs[i], f))) show_fangs(bigs[i], f, j); > else printf("%llu is not vampiric\n", (ull)bigs[i]); } > return 0;} > > So, what am I missing? > > What more information do you need to diagnose the problem? > > Thanks, > > Ken Wolcott > >
