1 files changed, 96 insertions, 0 deletions
diff --git a/gcc/config/i386/isc.h b/gcc/config/i386/isc.h
new file mode 100755
index 0000000..6c1c4c7
--- /dev/null
+++ b/gcc/config/i386/isc.h
@@ -0,0 +1,96 @@
+/* Assembler-independent definitions for an Intel 386 running
+   Interactive Unix System V. Specifically, this is for recent versions
+   that support POSIX.  */
+
+/* Use crt1.o, not crt0.o, as a startup file, and crtn.o as a closing file. */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{!shlib:%{posix:%{pg:mcrtp1.o%s}%{!pg:%{p:mcrtp1.o%s}%{!p:crtp1.o%s}}}\
+   %{Xp:%{pg:mcrtp1.o%s}%{!pg:%{p:mcrtp1.o%s}%{!p:crtp1.o%s}}}\
+   %{!posix:%{!Xp:%{pg:mcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}\
+   %{p:-L/lib/libp} %{pg:-L/lib/libp}}}}\
+   %{shlib:%{Xp:crtp1.o%s}%{posix:crtp1.o%s}%{!posix:%{!Xp:crt1.o%s}}}\
+   crtbegin.o%s"
+  
+#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
+
+/* Library spec */
+#undef LIB_SPEC
+#define LIB_SPEC "%{shlib:-lc_s} %{posix:-lcposix} %{Xp:-lcposix} -lc -lg"
+
+#undef CPP_SPEC
+#define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} %{Xp:-D_POSIX_SOURCE}"
+
+/* ISC 2.2 uses `char' for `wchar_t'.  */
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "char"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE BITS_PER_UNIT
+
+#if 0
+/* This is apparently not true: ISC versions up to 3.0, at least, use
+   the standard calling sequence in which the called function pops the
+   extra arg.  */
+/* caller has to pop the extra argument passed to functions that return
+   structures. */
+
+#undef RETURN_POPS_ARGS
+#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE)   \
+  ((FUNDECL) && TREE_CODE (FUNDECL) == IDENTIFIER_NODE ? 0	\
+   : (TARGET_RTD						\
+      && (TYPE_ARG_TYPES (FUNTYPE) == 0				\
+	  || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE)))	\
+	      == void_type_node))) ? (SIZE)			\
+   : 0)
+/* On other 386 systems, the last line looks like this:
+   : (aggregate_value_p (TREE_TYPE (FUNTYPE))) ? GET_MODE_SIZE (Pmode) : 0)  */
+#endif
+
+/* Handle #pragma pack and #pragma weak.  */
+#define HANDLE_SYSV_PRAGMA
+
+/* By default, target has a 80387, uses IEEE compatible arithmetic,
+   and returns float values in the 387, ie,
+   (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387)
+
+   ISC's software emulation of a 387 fails to handle the `fucomp'
+   opcode.  fucomp is only used when generating IEEE compliant code.
+   So don't make TARGET_IEEE_FP default for ISC. */
+
+#undef TARGET_DEFAULT
+#define TARGET_DEFAULT (MASK_80387 | MASK_FLOAT_RETURNS)
+
+/* The ISC 2.0.2 software FPU emulator apparently can't handle
+   80-bit XFmode insns, so don't generate them.  */
+#undef LONG_DOUBLE_TYPE_SIZE
+#define LONG_DOUBLE_TYPE_SIZE 64
+
+/* The ISC assembler does not like a .file directive with a name
+   longer than 14 characters.  Truncating it will not permit
+   debugging to work properly, but at least we won't get an error
+   message.  */
+
+#undef ASM_FILE_START
+#define ASM_FILE_START(FILE)				\
+  do {							\
+    int len = strlen (main_input_filename);		\
+    char *na = main_input_filename + len;		\
+    char shorter[15];					\
+    /* NA gets MAIN_INPUT_FILENAME sans directory names.  */\
+    while (na > main_input_filename)			\
+      {							\
+	if (na[-1] == '/')				\
+	  break;					\
+	na--;						\
+      }							\
+    strncpy (shorter, na, 14);				\
+    shorter[14] = 0;					\
+    fprintf (FILE, "\t.file\t");			\
+    output_quoted_string (FILE, shorter);		\
+    fprintf (FILE, "\n");				\
+  } while (0)
+
+/* Work around assembler forward label references generated in exception
+   handling code. */
+#define DWARF2_UNWIND_INFO 0