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isc.h
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1994-02-06
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58 lines
/* 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}}}\
%{!posix:%{pg:mcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}\
%{p:-L/lib/libp} %{pg:-L/lib/libp}}}\
%{shlib:%{posix:crtp1.o%s}%{!posix:crt1.o%s}} crtbegin.o%s"
#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
/* Library spec */
#undef LIB_SPEC
#define LIB_SPEC "%{posix:-lcposix} %{shlib:-lc_s} -lc -lg"
/* 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(FUNTYPE,SIZE) \
(TREE_CODE (FUNTYPE) == 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 (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 0201