Sync toplevel with upstream GCC.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
113
config/gcc-plugin.m4
Normal file
113
config/gcc-plugin.m4
Normal file
@ -0,0 +1,113 @@
|
||||
# gcc-plugin.m4 -*- Autoconf -*-
|
||||
# Check whether GCC is able to be built with plugin support.
|
||||
|
||||
dnl Copyright (C) 2014 Free Software Foundation, Inc.
|
||||
dnl This file is free software, distributed under the terms of the GNU
|
||||
dnl General Public License. As a special exception to the GNU General
|
||||
dnl Public License, this file may be distributed as part of a program
|
||||
dnl that contains a configuration script generated by Autoconf, under
|
||||
dnl the same distribution terms as the rest of that program.
|
||||
|
||||
# Check for plugin support.
|
||||
# Respects --enable-plugin.
|
||||
# Sets the shell variables enable_plugin and pluginlibs.
|
||||
AC_DEFUN([GCC_ENABLE_PLUGINS],
|
||||
[# Check for plugin support
|
||||
AC_ARG_ENABLE(plugin,
|
||||
[AS_HELP_STRING([--enable-plugin], [enable plugin support])],
|
||||
enable_plugin=$enableval,
|
||||
enable_plugin=yes; default_plugin=yes)
|
||||
|
||||
pluginlibs=
|
||||
|
||||
case "${host}" in
|
||||
*-*-darwin*)
|
||||
if test x$build = x$host; then
|
||||
export_sym_check="nm${exeext} -g"
|
||||
elif test x$host = x$target; then
|
||||
export_sym_check="$gcc_cv_nm -g"
|
||||
else
|
||||
export_sym_check=
|
||||
fi
|
||||
;;
|
||||
*)
|
||||
if test x$build = x$host; then
|
||||
export_sym_check="objdump${exeext} -T"
|
||||
elif test x$host = x$target; then
|
||||
export_sym_check="$gcc_cv_objdump -T"
|
||||
else
|
||||
export_sym_check=
|
||||
fi
|
||||
;;
|
||||
esac
|
||||
|
||||
if test x"$enable_plugin" = x"yes"; then
|
||||
|
||||
AC_MSG_CHECKING([for exported symbols])
|
||||
if test "x$export_sym_check" != x; then
|
||||
echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
|
||||
${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest$ac_exeext > /dev/null 2>&1
|
||||
if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
|
||||
: # No need to use a flag
|
||||
AC_MSG_RESULT([yes])
|
||||
else
|
||||
AC_MSG_RESULT([yes])
|
||||
AC_MSG_CHECKING([for -rdynamic])
|
||||
${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest$ac_exeext > /dev/null 2>&1
|
||||
if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
|
||||
plugin_rdynamic=yes
|
||||
pluginlibs="-rdynamic"
|
||||
else
|
||||
plugin_rdynamic=no
|
||||
enable_plugin=no
|
||||
fi
|
||||
AC_MSG_RESULT([$plugin_rdynamic])
|
||||
fi
|
||||
else
|
||||
AC_MSG_RESULT([unable to check])
|
||||
fi
|
||||
|
||||
# Check -ldl
|
||||
saved_LIBS="$LIBS"
|
||||
AC_SEARCH_LIBS([dlopen], [dl])
|
||||
if test x"$ac_cv_search_dlopen" = x"-ldl"; then
|
||||
pluginlibs="$pluginlibs -ldl"
|
||||
fi
|
||||
LIBS="$saved_LIBS"
|
||||
|
||||
# Check that we can build shared objects with -fPIC -shared
|
||||
saved_LDFLAGS="$LDFLAGS"
|
||||
saved_CFLAGS="$CFLAGS"
|
||||
case "${host}" in
|
||||
*-*-darwin*)
|
||||
CFLAGS=`echo $CFLAGS | sed s/-mdynamic-no-pic//g`
|
||||
CFLAGS="$CFLAGS -fPIC"
|
||||
LDFLAGS="$LDFLAGS -shared -undefined dynamic_lookup"
|
||||
;;
|
||||
*)
|
||||
CFLAGS="$CFLAGS -fPIC"
|
||||
LDFLAGS="$LDFLAGS -fPIC -shared"
|
||||
;;
|
||||
esac
|
||||
AC_MSG_CHECKING([for -fPIC -shared])
|
||||
AC_TRY_LINK(
|
||||
[extern int X;],[return X == 0;],
|
||||
[AC_MSG_RESULT([yes]); have_pic_shared=yes],
|
||||
[AC_MSG_RESULT([no]); have_pic_shared=no])
|
||||
if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
|
||||
pluginlibs=
|
||||
enable_plugin=no
|
||||
fi
|
||||
LDFLAGS="$saved_LDFLAGS"
|
||||
CFLAGS="$saved_CFLAGS"
|
||||
|
||||
# If plugin support had been requested but not available, fail.
|
||||
if test x"$enable_plugin" = x"no" ; then
|
||||
if test x"$default_plugin" != x"yes"; then
|
||||
AC_MSG_ERROR([
|
||||
Building GCC with plugin support requires a host that supports
|
||||
-fPIC, -shared, -ldl and -rdynamic.])
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
])
|
Reference in New Issue
Block a user