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configure: test for pwritev

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MacOS doesn't have it apparently.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2019-09-11 09:22:52 +09:30
parent 8df27a7bbb
commit 8843ab4fb7
1 changed files with 23 additions and 0 deletions
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23
configure vendored
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@ -292,6 +292,29 @@ code=
#error "Not modern GCC"
#endif
/*END*/
var=HAVE_PWRITEV
desc=pwritev() defined
style=DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE
code=
#include <sys/uio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(void)
{
struct iovec iov[2];
int fd = open("/dev/null", O_WRONLY);
iov[0].iov_base = "hello";
iov[0].iov_len = 5;
iov[1].iov_base = " world";
iov[1].iov_len = 6;
if (pwritev(fd, iov, 2, 0) == 11)
return 0;
return 1;
}
/*END*/
EOF
mv $CONFIG_VAR_FILE.$$ $CONFIG_VAR_FILE