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m4/ld-version-script.m4
48 строк
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Tom Parker
Non-GNU ld doesn't have --version-script support
11 июл 2018, 16:40
11 июл 2018, 16:40
a547959
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# ld-version-script.m4 serial 4 dnl Copyright (C) 2008-2016 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 From Simon Josefsson # FIXME: The test below returns a false positive for mingw # cross-compiles, 'local:' statements does not reduce number of # exported symbols in a DLL. Use --disable-ld-version-script to work # around the problem. # gl_LD_VERSION_SCRIPT # -------------------- # Check if LD supports linker scripts, and define automake conditional # HAVE_LD_VERSION_SCRIPT if so. AC_DEFUN([gl_LD_VERSION_SCRIPT], [ AC_ARG_ENABLE([ld-version-script], [AS_HELP_STRING([--enable-ld-version-script], [enable linker version script (default is enabled when possible)])], [have_ld_version_script=$enableval], [AC_CACHE_CHECK([if LD -Wl,--version-script works], [gl_cv_sys_ld_version_script], [gl_cv_sys_ld_version_script=no save_LDFLAGS=$LDFLAGS LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map" echo foo >conftest.map AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [], [cat > conftest.map <<EOF VERS_1 { global: sym; }; VERS_2 { global: sym; } VERS_1; EOF AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [gl_cv_sys_ld_version_script=yes])]) rm -f conftest.map LDFLAGS=$save_LDFLAGS]) have_ld_version_script=$gl_cv_sys_ld_version_script]) AM_CONDITIONAL([HAVE_LD_VERSION_SCRIPT], [test "$have_ld_version_script" = yes]) ])