1dnl Check whether the linker supports --version-script. 2dnl 3dnl Probes whether the linker supports --version-script with a simple version 4dnl script that only defines a single version. Sets the Automake conditional 5dnl HAVE_LD_VERSION_SCRIPT based on whether it is supported. 6dnl 7dnl The canonical version of this file is maintained in the rra-c-util 8dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>. 9dnl 10dnl Written by Russ Allbery <eagle@eyrie.org> 11dnl Based on the gnulib ld-version-script macro from Simon Josefsson 12dnl Copyright 2010 13dnl The Board of Trustees of the Leland Stanford Junior University 14dnl Copyright 2008-2010 Free Software Foundation, Inc. 15dnl 16dnl This file is free software; the authors give unlimited permission to copy 17dnl and/or distribute it, with or without modifications, as long as this 18dnl notice is preserved. 19dnl 20dnl SPDX-License-Identifier: FSFULLR 21 22AC_DEFUN([RRA_LD_VERSION_SCRIPT], 23[AC_CACHE_CHECK([if -Wl,--version-script works], [rra_cv_ld_version_script], 24 [save_LDFLAGS="$LDFLAGS" 25 LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map" 26 cat > conftest.map <<EOF 27VERSION_1 { 28 global: 29 sym; 30 31 local: 32 *; 33}; 34EOF 35 AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], 36 [rra_cv_ld_version_script=yes], [rra_cv_ld_version_script=no]) 37 rm -f conftest.map 38 LDFLAGS="$save_LDFLAGS"]) 39 AM_CONDITIONAL([HAVE_LD_VERSION_SCRIPT], 40 [test x"$rra_cv_ld_version_script" = xyes])]) 41