> On 5 Nov 2022, at 22:37, Sam James <s...@gentoo.org> wrote: > > > >> On 5 Nov 2022, at 05:07, Sam James <s...@gentoo.org> wrote: >> >> Hello, >> >> When working on Clang 16 (and presumably GCC 14) porting [0], I noticed the >> following >> when building GNU grep 3.8: >> ``` >> configure:6215: checking for clang-16 option to enable C11 features >> configure:6230: clang-16 -c -g -O2 conftest.c >&5 >> conftest.c:26:14: warning: a function definition without a prototype is >> deprecated in all versions of C and is not supported in C2x >> [-Wdeprecated-non-prototype] >> static char *e (p, i) >> ^ >> conftest.c:246:3: error: call to undeclared library function 'free' with >> type 'void (void *)'; ISO C99 and later do not support implicit function >> declarations [-Wimplicit-function-declaration] >> free (ia); >> ^ >> conftest.c:246:3: note: include the header <stdlib.h> or explicitly provide >> a declaration for 'free' >> 1 warning and 1 error generated. >> [...] >> ``` > > I would send a patch for the original issue but I'm wondering how to handle > freestanding (see big comment above _AC_C_C89_TEST_GLOBALS). > > We need another one (<assert.h>) I think for _Static_assert in > _AC_C_C11_TEST_GLOBALS too, up until C23? >
It looks like the original issue is fixed (https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=bf5a75953b6d504f0405b1ca33b039b8dd39eef4) but I think we still need treatment for _Static_assert?
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