First cut at making a minimal intrusive munge of gcc to fit in a BSD

framework.  This means, provide a Makefile.bsd-wrapper.  Remove
intermediate files from the source dir.  Build them in the obj-dir.
Add some Makefile hooks so we can tune the std Makefile for our
purpose but still have it behave normal for out-of-tree
configurations.  Only i386 is supported for now.  The other archs will
follow soon.   This checkin requires an existing makeinfo and a yacc
that accepts -o.

2 files changed, 85 insertions, 0 deletions

diff --git a/gnu/usr.bin/gcc/config/i386/openbsd.h b/gnu/usr.bin/gcc/config/i386/openbsd.h
new file mode 100644
index 00000000000..b64352e15a7
--- /dev/null
+++ b/gnu/usr.bin/gcc/config/i386/openbsd.h
@@ -0,0 +1,81 @@
+/* This goes away when the math-emulator is fixed */
+#define TARGET_CPU_DEFAULT 0400		/* TARGET_NO_FANCY_MATH_387 */
+
+/* This is tested by i386gas.h.  */
+#define YES_UNDERSCORES
+
+#include <i386/gstabs.h>
+
+/* Get perform_* macros to build libgcc.a.  */
+#include <i386/perform.h>
+
+/* Get generic OpenBSD definitions.  */
+#include <openbsd.h>
+
+/* Keep __NetBSD__ until we diverge sufficiently from them.  */
+#undef CPP_PREDEFINES
+#define CPP_PREDEFINES "-Dunix -Di386 -D__OpenBSD__ -D__NetBSD__ -Asystem(unix) -Asystem(OpenBSD) -Acpu(i386) -Amachine(i386)"
+
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_UNSIGNED
+#define WCHAR_UNSIGNED 0
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+#define HANDLE_SYSV_PRAGMA
+
+/* There are conflicting reports about whether this system uses
+   a different assembler syntax.  wilson@cygnus.com says # is right.  */
+#undef COMMENT_BEGIN
+#define COMMENT_BEGIN "#"
+
+#undef ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+#undef ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+
+/* The following macros are stolen from i386v4.h */
+/* These have to be defined to get PIC code correct */
+
+/* This is how to output an element of a case-vector that is relative.
+   This is only used for PIC code.  See comments by the `casesi' insn in
+   i386.md for an explanation of the expression this outputs. */
+
+#undef ASM_OUTPUT_ADDR_DIFF_ELT
+#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
+  fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
+
+/* Indicate that jump tables go in the text section.  This is
+   necessary when compiling PIC code.  */
+
+#define JUMP_TABLES_IN_TEXT_SECTION
+
+/* 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
+
+/* Profiling routines, partially copied from i386/osfrose.h.  */
+
+/* Redefine this to use %eax instead of %edx.  */
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE, LABELNO)  \
+{									\
+  if (flag_pic)								\
+    {									\
+      fprintf (FILE, "\tcall mcount@PLT\n");				\
+    }									\
+  else									\
+    {									\
+      fprintf (FILE, "\tcall mcount\n");				\
+    }									\
+}
diff --git a/gnu/usr.bin/gcc/config/i386/xm-openbsd.h b/gnu/usr.bin/gcc/config/i386/xm-openbsd.h
new file mode 100644
index 00000000000..b01f2c29ca5
--- /dev/null
+++ b/gnu/usr.bin/gcc/config/i386/xm-openbsd.h
@@ -0,0 +1,4 @@
+/* Configuration for GCC for Intel i386 running OpenBSD as host.  */
+
+#include <i386/xm-i386.h>
+#include <xm-openbsd.h>