kc3-lang/gnulib/m4/sys_un_h.m4
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Hash : d3a9a1f7
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Date : 2025-01-10T23:52:54
sys_un-h: Ensure that <sys/un.h> defines sa_family_t. * lib/sys_un.in.h: Include <sys/socket.h> or define sa_family_t explicitly. * m4/sys_socket_h.m4 (gl_PREREQ_SYS_SA_FAMILY): New macro, extracted from gl_SYS_SOCKET_H. (gl_SYS_SOCKET_H): Invoke it. (gl_SYS_SOCKET_H_DEFAULTS): Don't initialize HAVE_SA_FAMILY_T. * m4/sys_un_h.m4 (gl_SYS_UN_H): Invoke gl_PREREQ_SYS_SA_FAMILY. Test whether <sys/un.h> defines sa_family_t. If not, set GL_GENERATE_SYS_UN_H to true. * modules/sys_un-h (Makefile.am): Substitute HAVE_SA_FAMILY_T, HAVE_SA_FAMILY_T_IN_SYS_UN_H. * tests/test-sys_un-h.c: Include intprops.h. Verify that sa_family_t is defined and an unsigned integer type. * modules/sys_un-h-tests (Depends-on): Add intprops. * doc/posix-headers/sys_un.texi: Mention the problem with sa_family_t.
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m4/sys_un_h.m4
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# sys_un_h.m4 # serial 3 dnl Copyright 2024-2025 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. dnl This file is offered as-is, without any warranty. AC_DEFUN_ONCE([gl_SYS_UN_H], [ AC_REQUIRE([AC_CANONICAL_HOST]) dnl Check if UNIX domain sockets are supported. AC_REQUIRE([gl_SOCKET_FAMILY_UNIX]) gl_PREREQ_SYS_SA_FAMILY AC_CACHE_CHECK([whether <sys/un.h> defines sa_family_t], [gl_cv_type_sys_un_sa_family_t], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([[ #include <stddef.h> #include <string.h> #include <sys/un.h> ]], [[ sa_family_t f; ]]) ], [gl_cv_type_sys_un_sa_family_t=yes], [gl_cv_type_sys_un_sa_family_t=no]) ]) if test $gl_cv_type_sys_un_sa_family_t = yes; then HAVE_SA_FAMILY_T_IN_SYS_UN_H=1 else HAVE_SA_FAMILY_T_IN_SYS_UN_H=0 fi AC_SUBST([HAVE_SA_FAMILY_T_IN_SYS_UN_H]) GL_GENERATE_SYS_UN_H=false if test $gl_cv_socket_unix = yes; then dnl Check if using a Windows version that supports AF_UNIX. dnl See <https://devblogs.microsoft.com/commandline/af_unix-comes-to-windows/>. if test "$ac_cv_header_winsock2_h" = yes \ && test "$ac_cv_header_afunix_h" = yes; then GL_GENERATE_SYS_UN_H=true fi case "$host_os" in dnl On glibc systems, we need to include <string.h> before <sys/un.h>, dnl at least in C++ mode with clang. *-gnu* | gnu*) GL_GENERATE_SYS_UN_H=true ;; esac fi if test $HAVE_SA_FAMILY_T_IN_SYS_UN_H = 0; then GL_GENERATE_SYS_UN_H=true fi if $GL_GENERATE_SYS_UN_H; then AC_CHECK_HEADERS([sys/un.h]) gl_CHECK_NEXT_HEADERS([sys/un.h]) if test $ac_cv_header_sys_un_h = yes; then HAVE_SYS_UN_H=1 else HAVE_SYS_UN_H=0 fi AC_SUBST([HAVE_SYS_UN_H]) dnl Checked in gl_SOCKET_FAMILY_UNIX. if test "$ac_cv_header_afunix_h" = yes; then HAVE_AFUNIX_H=1 else HAVE_AFUNIX_H=0 fi AC_SUBST([HAVE_AFUNIX_H]) fi ])