We're checking for various sizes in configure.ac, among them the size of the socklen_t type. If socklen_t's size is not found and thus reported to be zero, we will typedef our own socklen_t as "unsigned int". The check for socklen_t is insufficient, though. While the type is declared via <sys/socket.h>, we only search AC_INCLUDES_DEFAULT for its declaration, which doesn't include <sys/socket.h>. On musl libc, this causes us to not find the declaration and redeclare it with an incompatible type. Fix the issue by searching both the default includes as well as <sys/socket.h>. Signed-off-by: Patrick Steinhardt <ps@xxxxxx> --- configure.ac | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/configure.ac b/configure.ac index 50002b4a..37096944 100644 --- a/configure.ac +++ b/configure.ac @@ -545,7 +545,10 @@ AC_CHECK_SIZEOF(short) AC_CHECK_SIZEOF(int) AC_CHECK_SIZEOF(long) AC_CHECK_SIZEOF(size_t) -AC_CHECK_SIZEOF(socklen_t) +AC_CHECK_SIZEOF(socklen_t,, [AC_INCLUDES_DEFAULT + #ifdef HAVE_SYS_SOCKET_H + # include <sys/socket.h> + #endif]) dnl ************************************************************* -- 2.23.0
