On 14/08/2023 00:46, Bruno Haible wrote:
Building the current coreutils on GNU/kFreeBSD 7, I get link errors:CCLD src/cksum src/cksum-cksum.o: In function `pclmul_supported': /home/bruno/coreutils-2023-08-13/build-64/../src/cksum.c:149: undefined reference to `__builtin_cpu_supports' /home/bruno/coreutils-2023-08-13/build-64/../src/cksum.c:150: undefined reference to `__builtin_cpu_supports' collect2: error: ld returned 1 exit status make[2]: *** [src/cksum] Error 1 CCLD src/wc src/wc.o: In function `avx2_supported': /home/bruno/coreutils-2023-08-13/build-64/../src/wc.c:150: undefined reference to `__builtin_cpu_supports' collect2: error: ld returned 1 exit status make[2]: *** [src/wc] Error 1 The reason is that the __builtin_cpu_supports function does not exist (since the gcc version is 4.7.2 and __builtin_cpu_supports was only introduced in gcc 4.8), but the configure test succeeds: Compiling this file =========================== foo.c =========================== #include <x86intrin.h> int main (void) { return __builtin_cpu_supports ("pclmul"); } ============================================================= merely produces warnings: $ gcc -c -Wall foo.c foo.c: In function ‘main’: foo.c:6:3: warning: implicit declaration of function ‘__builtin_cpu_supports’ [-Wimplicit-function-declaration] The attached patch fixes it.
Pushed, thanks, Pádraig
