54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
# ld-version-script.m4 serial 3
|
|
dnl Copyright (C) 2008-2014 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=$enableval], [])
|
|
if test -z "$have_ld_version_script"; then
|
|
AC_MSG_CHECKING([if LD -Wl,--version-script works])
|
|
save_LDFLAGS="$LDFLAGS"
|
|
LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
|
|
cat > conftest.map <<EOF
|
|
foo
|
|
EOF
|
|
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
|
|
[accepts_syntax_errors=yes], [accepts_syntax_errors=no])
|
|
if test "$accepts_syntax_errors" = no; then
|
|
cat > conftest.map <<EOF
|
|
VERS_1 {
|
|
global: sym;
|
|
};
|
|
|
|
VERS_2 {
|
|
global: sym;
|
|
} VERS_1;
|
|
EOF
|
|
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
|
|
[have_ld_version_script=yes], [have_ld_version_script=no])
|
|
else
|
|
have_ld_version_script=no
|
|
fi
|
|
rm -f conftest.map
|
|
LDFLAGS="$save_LDFLAGS"
|
|
AC_MSG_RESULT($have_ld_version_script)
|
|
fi
|
|
AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
|
|
])
|