From 5f59a34ab747dde8ede7357f3431bf06bd6002fe Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Sun, 8 Mar 2026 17:28:33 +0100 Subject: New upstream version 1.4.2 --- gnulib-m4/libdl.m4 | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 gnulib-m4/libdl.m4 (limited to 'gnulib-m4/libdl.m4') diff --git a/gnulib-m4/libdl.m4 b/gnulib-m4/libdl.m4 new file mode 100644 index 00000000..79d69063 --- /dev/null +++ b/gnulib-m4/libdl.m4 @@ -0,0 +1,46 @@ +# libdl.m4 +# serial 3 +dnl Copyright (C) 2024-2026 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. + +dnl From Bruno Haible. + +dnl Set LIBDL to '-ldl' if it is needed to use the functions declared +dnl in (dlopen, dlsym, etc.), or to empty otherwise. +AC_DEFUN([gl_LIBDL], +[ + dnl dlopen, dlsym are + dnl - in libc on glibc >= 2.34, musl libc, macOS, FreeBSD, NetBSD, OpenBSD, + dnl AIX, Solaris, Cygwin, Haiku, + dnl - in a separate libdl on glibc < 2.34, uClibc, Android. + AC_CACHE_CHECK([for library needed for dlopen and dlsym], + [gl_cv_lib_dl], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include + ]], + [[return ! dlsym (RTLD_DEFAULT, "main");]])], + [gl_cv_lib_dl=none], + [gl_cv_lib_dl=maybe]) + if test $gl_cv_lib_dl = maybe; then + saved_LIBS="$LIBS" + LIBS="$LIBS -ldl" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include + ]], + [[return ! dlsym (RTLD_DEFAULT, "main");]])], + [gl_cv_lib_dl='-ldl'], + [gl_cv_lib_dl=none]) + LIBS="$saved_LIBS" + fi + ]) + case "$gl_cv_lib_dl" in + none) LIBDL='' ;; + *) LIBDL="$gl_cv_lib_dl" ;; + esac + AC_SUBST([LIBDL]) +]) -- cgit v1.2.3