0cdf705cc6
-By adding MKGCC=yes and MKGCCCMDS=yes on the make commandline it is now possible to compile and install GCC on the system. Before doing this, if you are not using the build.sh script, you will need to call the fetch scripts in order to retrieve the sources of GCC and its dependencies. -Reduce difference with NetBSD share/mk Move Minix-specific parameters from bsd.gcc.mk to bsd.own.mk, which is anyway patched, so that bsd.gcc.mk is now aligned on the NetBSD version. -Clean libraries dependencies, compiles stdc++ only if gcc is also compiled (it is part of the gcc sources) -Correct minix.h header sequence, cleanup spec headers. -Fix cross-compilation from a 32bit host targeting MINIX/arm Change-Id: I1b234af18eed4ab5675188244e931b2a2b7bd943
117 lines
4.4 KiB
C
117 lines
4.4 KiB
C
/* Definitions for ARM running MINIX using the ELF format
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Copyright (C) 2001, 2004, 2007 Free Software Foundation, Inc.
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Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi.
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Adapted for MINIX by Lionel Sambuc <lionel@minix3.org>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#undef MINIX_TARGET_CPU_CPP_BUILTINS
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#define MINIX_TARGET_CPU_CPP_BUILTINS() \
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do \
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{ \
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TARGET_BPABI_CPP_BUILTINS(); \
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} \
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while (0)
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/* Define the actual types of some ANSI-mandated types.
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Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c,
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c-common.c, and config/<arch>/<arch>.h. */
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#undef SIZE_TYPE
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#define SIZE_TYPE "unsigned int"
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE "int"
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "int"
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/* VERY BIG NOTE: Change of structure alignment for NetBSD/arm.
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There are consequences you should be aware of...
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Normally GCC/arm uses a structure alignment of 32 for compatibility
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with armcc. This means that structures are padded to a word
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boundary. However this causes problems with bugged NetBSD kernel
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code (possibly userland code as well - I have not checked every
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binary). The nature of this bugged code is to rely on sizeof()
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returning the correct size of various structures rounded to the
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nearest byte (SCSI and ether code are two examples, the vm system
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is another). This code breaks when the structure alignment is 32
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as sizeof() will report a word=rounded size. By changing the
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structure alignment to 8. GCC will conform to what is expected by
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NetBSD.
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This has several side effects that should be considered.
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1. Structures will only be aligned to the size of the largest member.
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i.e. structures containing only bytes will be byte aligned.
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structures containing shorts will be half word aligned.
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structures containing ints will be word aligned.
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This means structures should be padded to a word boundary if
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alignment of 32 is required for byte structures etc.
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2. A potential performance penalty may exist if strings are no longer
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word aligned. GCC will not be able to use word load/stores to copy
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short strings.
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This modification is not encouraged but with the present state of the
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NetBSD source tree it is currently the only solution that meets the
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requirements. */
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#undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
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#define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
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/* Fixed-sized enum by default (-fno-short-enums) */
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#undef MINIX_CC1_SPEC
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#define MINIX_CC1_SPEC "%{!fshort-enums:%{!fno-short-enums:-fno-short-enums}} "
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/* Use by default the new abi and calling standard */
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#undef ARM_DEFAULT_ABI
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#define ARM_DEFAULT_ABI ARM_ABI_AAPCS
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/* LSC: FIXME: When activated, some programs crash on qemu with an illegal
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* instruction.
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* The cause is unknown (Missing support on MINIX, missing support
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* on the emulator, library error...).
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*/
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#if 0
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/* Make sure we use hard-floating point ABI by default */
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#undef TARGET_DEFAULT_FLOAT_ABI
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#define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
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#endif
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/* Default to full VFP if -mhard-float is specified. */
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#undef MINIX_SUBTARGET_ASM_FLOAT_SPEC
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#define MINIX_SUBTARGET_ASM_FLOAT_SPEC \
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"%{mhard-float:{!mfpu=*:-mfpu=vfpv3-d16}} \
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%{mfloat-abi=hard:{!mfpu=*:-mfpu=vfpv3-d16}}"
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#undef MINIX_SUBTARGET_EXTRA_ASM_SPEC
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#define MINIX_SUBTARGET_EXTRA_ASM_SPEC \
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"%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" \
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TARGET_FIX_V4BX_SPEC \
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"%{fpic|fpie:-k} %{fPIC|fPIE:-k}"
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/* Little endian by default */
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#undef TARGET_ENDIAN_DEFAULT
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#define TARGET_ENDIAN_DEFAULT 0
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#undef SUBTARGET_CPU_DEFAULT
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#define SUBTARGET_CPU_DEFAULT TARGET_CPU_cortexa8
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#undef TARGET_VERSION
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#define TARGET_VERSION fputs (" (MINIX/arm ELF EABI)", stderr);
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