2005-01-11 Marc Espie <espie@openbsd.org>

	* config.gcc (*-*-openbsd*): Set HAS_LIBC_R for OpenBSD <= 3.2.
	(i[34567]86-*-openbsd*): Switch to ELF for OpenBSD >= 3.4.
	* config/openbsd.h:  Fix C++ includes for native configurations.
	Add proper OS_CPP_BUILTINS.  Fix libspec for recent OpenBSD.
	Add trampoline support.
	* config/i386/openbsdelf.h: New.

okay Richard Earnshaw, Zack Weinberg, further changes in a separate patch.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@93694 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 130 insertions, 0 deletions

diff --git a/gcc/config/i386/openbsdelf.h b/gcc/config/i386/openbsdelf.h
new file mode 100644
index 00000000000..3088e849a35
--- /dev/null
+++ b/gcc/config/i386/openbsdelf.h
@@ -0,0 +1,130 @@
+/* Configuration for an OpenBSD i386 target.
+   
+   Copyright (C) 2005 Free Software Foundation, 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 2, 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 COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* This gets defined in tm.h->linux.h->svr4.h, and keeps us from using
+   libraries compiled with the native cc, so undef it. */
+#undef NO_DOLLAR_IN_LABEL
+
+/* Override the default comment-starter of "/".  */
+#undef ASM_COMMENT_START
+#define ASM_COMMENT_START "#"
+
+
+/* This goes away when the math-emulator is fixed */
+#undef TARGET_DEFAULT
+#define TARGET_DEFAULT \
+  (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
+
+/* Run-time target specifications */
+
+#define TARGET_OS_CPP_BUILTINS()		\
+  do						\
+    {						\
+    	OPENBSD_OS_CPP_BUILTINS_ELF();		\
+    }						\
+  while (0)
+
+/* As an elf system, we need crtbegin/crtend stuff.  */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC "\
+	%{!shared: %{pg:gcrt0%O%s} %{!pg:%{p:gcrt0%O%s} %{!p:crt0%O%s}} \
+	crtbegin%O%s} %{shared:crtbeginS%O%s}"
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
+
+/* Layout of source language data types.  */
+
+/* This must agree with <machine/ansi.h> */
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE BITS_PER_WORD
+
+/* Assembler format: overall framework.  */
+
+#undef ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+#undef ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+
+#undef SET_ASM_OP
+#define SET_ASM_OP	"\t.set\t"
+
+/* The following macros were originally stolen from i386v4.h.
+   These have to be defined to get PIC code correct.  */
+
+/* Assembler format: dispatch tables.  */
+
+/* Assembler format: sections.  */
+
+/* Stack & calling: aggregate returns.  */
+
+/* Don't default to pcc-struct-return, because gcc is the only compiler, and
+   we want to retain compatibility with older gcc versions.  */
+#define DEFAULT_PCC_STRUCT_RETURN 0
+
+/* Assembler format: alignment output.  */
+
+#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
+#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
+  if ((LOG) != 0) {\
+    if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
+    else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
+  }
+#endif
+
+/* Stack & calling: profiling.  */
+
+/* OpenBSD's profiler recovers all information from the stack pointer.
+   The icky part is not here, but in machine/profile.h.  */
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE, LABELNO)  \
+  fputs (flag_pic ? "\tcall __mcount@PLT\n": "\tcall __mcount\n", FILE);
+
+/* Assembler format: exception region output.  */
+
+/* our configuration still doesn't handle dwarf2 correctly */
+#define DWARF2_UNWIND_INFO 0
+
+/* Assembler format: alignment output.  */
+
+/* Note that we pick up ASM_OUTPUT_MAX_SKIP_ALIGN from i386/gas.h */
+
+/* Note that we pick up ASM_OUTPUT_MI_THUNK from unix.h.  */
+
+#undef LINK_SPEC
+#define LINK_SPEC \
+  "%{!shared:%{!nostdlib:%{!r*:%{!e*:-e __start}}}} \
+   %{shared:-shared} %{R*} \
+   %{static:-Bstatic} \
+   %{!static:-Bdynamic} \
+   %{assert*} \
+   %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so}"
+
+#define OBSD_HAS_CORRECT_SPECS