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/* Definitions of ELF target support for Altera Nios II.
Copyright (C) 2012-2017 Free Software Foundation, Inc.
Contributed by Jonah Graham (jgraham@altera.com),
Will Reece (wreece@altera.com), and Jeff DaSilva (jdasilva@altera.com).
Contributed by Mentor Graphics, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* Specs to support the additional command-line options for Nios II ELF
toolchains. */
/* -msmallc chooses an alternate C library.
-msys-lib= specifies an additional low-level system/hosting library and
is typically used to suck in a library provided by a HAL BSP. */
#undef LIB_SPEC
#define LIB_SPEC \
"--start-group %{msmallc: -lsmallc} %{!msmallc: -lc} -lgcc \
%{msys-lib=*: -l%*} \
--end-group \
"
/* Linking with -mhal suppresses inclusion of the GCC-provided crt* begin/end
code. Normally in this case you also link with -msys-crt0= to specify
the startup code provided by the HAL BSP instead. */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC \
"%{mhal:" \
"%{msys-crt0=*:%*} %{!msys-crt0=*:crt0%O%s} " \
"%{msys-crt0=:%eYou need a C startup file for -msys-crt0=};" \
":crti%O%s crtbegin%O%s}"
#undef ENDFILE_SPEC
#define ENDFILE_SPEC "%{!mhal:crtend%O%s crtn%O%s}"
/* The ELF target doesn't support the Nios II Linux ABI. */
#define TARGET_LINUX_ABI 0
/* Default -fdelete-null-pointer-checks to off, to prevent the compiler
from treating accesses to address zero as traps. On bare-metal Nios II
targets address zero may legitimately be mapped to memory (e.g., the
hardware description may specify this as the address of the interrupt
vector). Users can override this on the command line to get the
additional optimizations it enables. */
#define SUBTARGET_OVERRIDE_OPTIONS \
if (flag_delete_null_pointer_checks < 0) \
flag_delete_null_pointer_checks = 0
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