#! /bin/sh
#---------------------------------------------------------------------------#
# vim: ts=4 sw=4 expandtab ft=sh
#---------------------------------------------------------------------------#
# @configure_input@
#---------------------------------------------------------------------------#
# Copyright (C) 1995-2007, 2010-2012 The University of Melbourne.
# Copyright (C) 2013-2020, 2022-2023, 2025 The Mercury team.
# This file may only be copied under the terms of the GNU General
# Public License - see the file COPYING in the Mercury distribution.
#---------------------------------------------------------------------------#

# *************************************************************************
# *** IMPORTANT NOTE: any changes to this file may also require similar ***
# *** changes to compiler/compile_target_code.m                         ***
# *************************************************************************

FULLARCH=@FULLARCH@

DEFAULT_GRADE=${MERCURY_DEFAULT_GRADE=@DEFAULT_GRADE@}
CC=${MERCURY_C_COMPILER="@CC@"}
C_COMPILER_TYPE=${MERCURY_C_COMPILER_TYPE="@C_COMPILER_TYPE@"}
CFLAGS_FOR_REGS="@CFLAGS_FOR_REGS@"
CFLAGS_FOR_GOTOS="@CFLAGS_FOR_GOTOS@"
CFLAGS_FOR_THREADS="@CFLAGS_FOR_THREADS@"
CFLAGS_FOR_LTO="@CFLAGS_FOR_LTO@"
CFLAGS_FOR_NO_STRICT_ALIASING="@CFLAGS_FOR_NO_STRICT_ALIASING@"
CFLAGS_FOR_ANSI="@CFLAGS_FOR_ANSI@"
CFLAGS_FOR_SANITIZERS="@CFLAGS_FOR_SANITIZERS@"
BYTES_PER_WORD="@BYTES_PER_WORD@"
MKTEMP=@MKTEMP@
TMPDIR=${TMPDIR=/tmp}

case "${C_COMPILER_TYPE}" in
    gcc*)
        CHECK_OPTS="
            -Wall -Wwrite-strings
            -Wshadow -Wstrict-prototypes -Wmissing-prototypes -Wno-unused"

# XXX The following comment is *very* old.
# Note: we do not enable the following gcc warnings:
# -Wredundant-decls     causes too many complaints in system header files
# -Wpointer-arith       causes too many complaints in system header files
#                       (fixed in gcc 3.0, though, so at some point
#                       we should re-enable this)
# -Wtraditional         we don't care about compatibility with pre-ANSI C
# -Wconversion          really only intended to help people using \`unprotoize'
# -Waggregate-return    not useful, IMHO

# -Wcast-qual           causes LOTS of redundant warnings
# -Wcast-align          causes redundant warnings in memory.c
# -pedantic             causes unsuppressable warnings about LVALUE_CAST()
# -Wnested-externs      causes unsuppressable warnings about callentry()
# -Wid-clash-31         causes warnings about entry_mercury__xxx ...
#                       we don't care about compatibility with C compilers
#                       that have short fixed limits on identifier length
# -Wenum-clash          is for C++ only
# -Wunused              causes various spurious warnings

        # Enabling -fomit-frame-pointer causes setjmp/longjmp to misbehave
        # with MinGW on Windows XP.
        case "${FULLARCH}" in
            *mingw*)
              OPT_OPTS="-O2 ${CFLAGS_FOR_NO_STRICT_ALIASING}"
              ;;
            *)
              OPT_OPTS="-O2 ${CFLAGS_FOR_NO_STRICT_ALIASING} -fomit-frame-pointer"
              ;;
        esac
        DEBUG_OPTS="-g"
        DISABLE_OPTS_OPT="-O0"
        COMPILER_HALT_AT_WARN_OPT="-Werror"
        COMPILER=gcc
        ;;
    clang*)
        CHECK_OPTS="-w"
        OPT_OPTS="@OPT_FLAGS_FOR_CLANG@ ${CFLAGS_FOR_NO_STRICT_ALIASING} -fomit-frame-pointer"
        DEBUG_OPTS="-g"
        DISABLE_OPTS_OPT="-O0"
        COMPILER_HALT_AT_WARN_OPT="-Werror"
        COMPILER=clang
        ;;
    msvc*)
        CHECK_OPTS="-nologo"    # Suppress the MSVC banner message.
        OPT_OPTS="-O1"
        # See README.MS-VisualC for why we don't enable C level debugging.
        #DEBUG_OPTS="-Zi"
        DEBUG_OPTS=""
        DISABLE_OPTS_OPT="-Od"
        COMPILER_HALT_AT_WARN_OPT=""
        COMPILER=cl
        ;;
    *)
        CHECK_OPTS=
        OPT_OPTS="-O"
        DEBUG_OPTS="-g"
        DISABLE_OPTS_OPT="-O0"
        COMPILER_HALT_AT_WARN_OPT=""
        COMPILER=unknown
        ;;
esac

SPLIT_OPTS=""
INLINE_ALLOC_OPTS=""

verbose=false
mgnu_c_debug=false
c_optimize=true
use_activation_counts=false
preserve_tail_recursion=true
mercury_config_dir=${MERCURY_STDLIB_DIR-@LIBDIR@}
mercury_config_dir=${MERCURY_CONFIG_DIR=${mercury_config_dir}}
mercury_stdlib_dir=${MERCURY_STDLIB_DIR=@LIBDIR@}
do_filter_cc=true
halt_at_warn_if_possible=false

# include the file `init_grade_options.sh-subr'
@INIT_GRADE_OPTIONS@

# IMPORTANT: The manpage is produced automatically from this help message,
# so if you change it, do not forget to check that the manpage still looks OK.

Help="\
Name:   mgnuc - Mercury front-end to GNU C
Usage:  mgnuc [<options>] [-- <gcc/clang/msvc options>] files...
Options:
    -v, --verbose
        Echo gcc command before executing it.
    --no-ansi
        This option is deprecatd and no longer has any effect.
    --no-check
        Don't enable any of gcc's warnings.
    -g, --c-debug
        Generate object files that can debugged with C debuggers such as gdb.
    --no-c-optimize
        Disable optimization by the C compiler.
    --inline-alloc
        Inline calls to the memory allocator.
    --mercury-standard-library-directory <directory>
    --mercury-stdlib-dir <directory>
        The directory containing the installed Mercury standard library.
    --no-mercury-standard-library-directory, --no-mercury-stdlib-dir
        Don't use an installed Mercury standard library.
    --no-filter-cc
        Do not filter warnings from the C compiler.
    --halt-at-warn-if-possible
        Convert warnings into errors if (a) the C compiler supports this,
        and (b) the grade is an MLDS grade. (LLDS grades get some warnings
        that cannot be avoided.)

${grade_usage}

Description:
    This command runs the configured C compiler (usually gcc, clang, or msvc)
    with the appropriate options for compiling Mercury programs.
    Normally it invokes the C compiler with almost all warnings enabled,
    but this can be changed using \`--no-check' option.
Environment variables:
    MERCURY_DEFAULT_GRADE.
Files:
    If the current directory contains a file named .mgnuc_copts, then mgnuc
    will assume that it contains C compiler options that should be included
    on the C compiler's command line. This is usually used to specify C
    compiler search paths.
"

while true
do
    case "$1" in
        -h|--help|"-?")
            echo "${Help}"
            exit 0
            ;;

@MGNUC_FILE_OPTS@

        --mercury-standard-library-directory|--mercury-stdlib-dir)
            mercury_stdlib_dir="$2"
            mercury_config_dir="$2"
            shift
            ;;

        --mercury-config-directory|--mercury-config-dir)
            mercury_config_dir="$2"
            shift
            ;;

        # We don't allow `MERCURY_CONFIG_DIR' to be unset
        # without `MERCURY_STDLIB_DIR' also being unset.

        # include the file `parse_grade_options.sh-subr'
        @PARSE_GRADE_OPTIONS@

        --)
            shift
            break
            ;;

        *)
            break
            ;;
    esac
    shift
done

if test -r .mgnuc_opts
then
    for opt in `cat .mgnuc_opts`
    do
        case "${opt}" in

@MGNUC_FILE_OPTS@

            *)
                echo "unknown option ${opt} in .mgnuc_opts"
                exit 1
                ;;
        esac
    done
fi

# Include the file `final_grade_options.sh-subr'.
@FINAL_GRADE_OPTIONS@

# Compute the canonical grade name from the options settings.

# Include the file `canonical_grade.sh-subr'.
@CANONICAL_GRADE@

case "${mercury_stdlib_dir}" in
    "")
        MERC_ALL_C_INCL_DIRS=
        ;;
    *)
        # The option setting code above guarantees that if
        # `--mercury-stdlib-dir' is set, `--mercury-config-dir'
        # is also set.
        MERC_ALL_C_INCL_DIRS="-I${mercury_config_dir}/conf -I${mercury_stdlib_dir}/inc -I${mercury_stdlib_dir}/lib/${GRADE}/inc"
        ;;
esac

# Add /usr/local/include to the default search path, if needed.
ALL_LOCAL_C_INCL_DIRS=${MERCURY_ALL_LOCAL_C_INCL_DIRS=@ALL_LOCAL_C_INCL_DIRS@}

# Convert non-grade mgnuc options into gcc options.
#
# IMPORTANT: any changes here will require similar changes to
# compiler/compile_target_code.m.

case ${mgnu_c_debug} in
    # We set a variable named MGNUC_C_DEBUG_OPTS here, in the code that handles
    # a -g or a --c-debug option being given to mgnuc.

    true)
        # Because below we handle the related but nevertheless separate
        # target_debug grade component, and *that* code sets a variable
        # named TARGET_DEBUG_GRADE_OPTS, we have to zero out ${DEBUG_OPTS}
        # to prevent *that* code from including *another* copy of the
        # *original* ${DEBUG_OPTS} in the final list of C compiler options.
        MGNUC_C_DEBUG_OPTS="${DEBUG_OPTS}"
        DEBUG_OPTS=""
        ;;
    false)
        MGNUC_C_DEBUG_OPTS=""
        ;;
esac

case ${c_optimize} in
    true)       ;;
    false)      OPT_OPTS="" ;;
esac

# Convert grade mgnuc options into gcc options.
#
# IMPORTANT: any changes here may require similar changes to all the files
# mentioned in runtime/mercury_grade.h.

HALT_AT_WARN_OPT=""
case ${highlevel_code} in
    true)
        HLC_OPTS="-DMR_HIGHLEVEL_CODE"
        case ${halt_at_warn_if_possible} in
            true)
                HALT_AT_WARN_OPT="${COMPILER_HALT_AT_WARN_OPT}"
                ;;
        esac
        ;;
    false)
        HLC_OPTS=""
        ;;
esac

case ${asm_labels} in
    true)       ASM_OPTS="-DMR_USE_ASM_LABELS" ;;
    false)      ASM_OPTS="" ;;
esac

case ${non_local_gotos} in
    true)       GOTO_OPTS="-DMR_USE_GCC_NONLOCAL_GOTOS" ;;
    false)      GOTO_OPTS="" ;;
esac

case ${global_regs} in
    true)       REG_OPTS="-DMR_USE_GCC_GLOBAL_REGISTERS" ;;
    false)      REG_OPTS="" ;;
esac

case ${thread_safe} in
    true)
        THREAD_OPTS="-DMR_THREAD_SAFE ${CFLAGS_FOR_THREADS}"
        ;;
    false)
        THREAD_OPTS=""
        ;;
esac

case ${threadscope} in
    true)       THREADSCOPE_OPTS="-DMR_THREADSCOPE" ;;
    false)      THREADSCOPE_OPTS="" ;;
esac

# Set the correct flags if we are to use the MS Visual C runtime.
use_msvcrt=@USE_MSVCRT@
if test ${use_msvcrt} = "yes"
then
    case ${thread_safe} in
        # -MD states that we will use the MSVC runtime, the boehm_gc collector
        # assumes that the collector has been built as a DLL if we are using
        # the MSVC runtime so we need to define GC_NOT_DLL when the collector
        # isn't built as a DLL.
        true)   MSVCRT_OPTS="-MD" ;;
        false)  MSVCRT_OPTS="-DGC_NOT_DLL -MD" ;;
    esac
else
    MSVCRT_OPTS=""
fi

boehm_opts="-DMR_CONSERVATIVE_GC -DMR_BOEHM_GC "
case ${gc_method} in
    accurate)       GC_OPTS="-DMR_NATIVE_GC" ;;
    boehm)          GC_OPTS="${boehm_opts}" ;;
    boehm_debug)    GC_OPTS="${boehm_opts} -DMR_BOEHM_GC_DEBUG -DGC_DEBUG -DKEEP_BACK_PTRS" ;;
    hgc)            GC_OPTS="-DMR_CONSERVATIVE_GC -DMR_HGC" ;;
    conservative)   GC_OPTS="-DMR_CONSERVATIVE_GC -DMR_BOEHM_GC" ;;
    none)           GC_OPTS="" ;;
esac

case ${profile_time} in
    true)       PROF_TIME_OPTS="-DMR_MPROF_PROFILE_TIME" ;;
    false)      PROF_TIME_OPTS="" ;;
esac

case ${profile_calls} in
    true)       PROF_CALLS_OPTS="-DMR_MPROF_PROFILE_CALLS" ;;
    false)      PROF_CALLS_OPTS="" ;;
esac

case ${profile_memory} in
    true)       PROF_MEMORY_OPTS="-DMR_MPROF_PROFILE_MEMORY" ;;
    false)      PROF_MEMORY_OPTS="" ;;
esac

case ${use_activation_counts} in
    true)       ACTIVATION_COUNT_OPT="-DMR_USE_ACTIVATION_COUNTS" ;;
    false)      ACTIVATION_COUNT_OPT="";;
esac

case ${preserve_tail_recursion} in
    true)       PRESERVE_TAIL_RECURSION_OPT="-DMR_DEEP_PROFILING_TAIL_RECURSION" ;;
    false)      PRESERVE_TAIL_RECURSION_OPT="";;
esac

case ${profile_deep} in
    true)       PROF_DEEP_OPTS="-DMR_DEEP_PROFILING ${ACTIVATION_COUNT_OPT} ${PRESERVE_TAIL_RECURSION_OPT}" ;;
    false)      PROF_DEEP_OPTS="" ;;
esac

case ${record_term_sizes_as_words},${record_term_sizes_as_cells} in
    true,true)
        progname=`basename $0`
        echo "${progname}: we can't record both cell and word sizes"
        exit 1
        ;;
    true,false)
        RECORD_TERM_SIZE_OPTS="-DMR_RECORD_TERM_SIZES" ;;
    false,true)
        RECORD_TERM_SIZE_OPTS="-DMR_RECORD_TERM_SIZES -DMR_RECORD_TERM_SIZES_AS_CELLS" ;;
    false,false)
        RECORD_TERM_SIZE_OPTS="" ;;
esac

case ${use_trail} in
    true)
        TRAIL_OPTS="-DMR_USE_TRAIL"
        # See the comment in compile_c_file/7 in compiler/compile_target_code.m
        # for an explanation of this.
        case ${COMPILER} in
            gcc|clang) FN_ALIGN_OPTS="-falign-functions=${BYTES_PER_WORD}" ;;
            *)         FN_ALIGN_OPTS="" ;;
        esac
        ;;
    false)
        TRAIL_OPTS=""
        ;;
esac

case ${use_minimal_model_stack_copy},${use_minimal_model_own_stacks} in
    true,true)
        progname=`basename $0`
        echo "${progname}: can't enable both forms of minimal model tabling at once"
        exit 1
        ;;
    true,false)
        MINIMAL_MODEL_OPTS="-DMR_USE_MINIMAL_MODEL_STACK_COPY"
        ;;
    false,true)
        MINIMAL_MODEL_OPTS="-DMR_USE_MINIMAL_MODEL_OWN_STACKS"
        ;;
    false,false)
        MINIMAL_MODEL_OPTS=""
        ;;
esac

case ${use_minimal_model},${minimal_model_debug} in
    true,false)     ;; # MINIMAL_MODEL_OPTS is already set
    true,true)      MINIMAL_MODEL_OPTS="${MINIMAL_MODEL_OPTS} -DMR_MINIMAL_MODEL_DEBUG" ;;
    *)              MINIMAL_MODEL_OPTS="" ;;
esac

case ${pregenerated_dist},${single_prec_float} in
    true,true)
        progname=`basename $0`
        echo "${progname}: cannot enable both pregenerated dist and single-prec float"
        exit 1
        ;;
    true,false)
        PREGEN_SPF_OPTS="-DMR_PREGENERATED_DIST"
        ;;
    false,true)
        PREGEN_SPF_OPTS="-DMR_USE_SINGLE_PREC_FLOAT"
        ;;
    false,false)
        PREGEN_SPF_OPTS=""
        ;;
esac

case ${debug} in
    true)           TRACE_OPTS="-DMR_EXEC_TRACE" ;;
    false)          TRACE_OPTS="" ;;
esac

case ${decl_debug} in
    true)           DECL_DEBUG_OPTS="-DMR_DECL_DEBUG" ;;
    false)          DECL_DEBUG_OPTS="" ;;
esac

case ${ss_debug} in
    true)           SS_DEBUG_OPTS="-DMR_SS_DEBUG" ;;
    false)          SS_DEBUG_OPTS="" ;;
esac

case ${target_debug_grade} in
    true)           TARGET_DEBUG_GRADE_OPTS="-DMR_TARGET_DEBUG_GRADE ${DEBUG_OPTS} ${DISABLE_OPTS_OPT}" ;;
    false)          TARGET_DEBUG_GRADE_OPTS="" ;;
esac

case ${extend_stacks} in
    true)           EXTEND_STACKS_OPTS="-DMR_EXTEND_STACKS_WHEN_NEEDED" ;;
    false)          EXTEND_STACKS_OPTS="" ;;
esac

case ${stack_segments} in
    true)           STACK_SEGMENTS_OPTS="-DMR_STACK_SEGMENTS" ;;
    false)          STACK_SEGMENTS_OPTS="" ;;
esac

case ${use_regions} in
    true)
        REGION_OPTS_0="-DMR_USE_REGIONS"
        case ${use_regions_debug} in
            true)   REGION_OPTS_1="${REGION_OPTS_0} -DMR_RBMM_DEBUG" ;;
            false)  REGION_OPTS_1="${REGION_OPTS_0}" ;;
        esac
        case ${use_regions_profiling} in
            true)   REGION_OPTS="${REGION_OPTS_1} -DMR_RBMM_PROFILING" ;;
            false)  REGION_OPTS="${REGION_OPTS_1}" ;;
        esac
        ;;
    false)
        REGION_OPTS=""
        ;;
esac

GCC_OPTS="${ASM_OPTS} ${GOTO_OPTS} ${REG_OPTS}"

# check that special grades are only used with gcc
case ${COMPILER} in
    gcc|unknown)
        ;;
    *)  case "${GCC_OPTS}" in
            *USE_GCC*)
                progname=`basename $0`
                echo "${progname}: For compilers other than GNU C, the only" 1>&2
                echo "${progname}: base grade allowed is \`none'" 1>&2
                ;;
        esac
        ;;
esac

# If we are using global registers, add CFLAGS_FOR_REGS.
case ${global_regs} in
    true)       GCC_OPTS="${GCC_OPTS} ${CFLAGS_FOR_REGS}" ;;
    false)      ;;
esac

# If we are using non-local gotos, add CFLAGS_FOR_GOTOS.
case ${non_local_gotos} in
    true)       GCC_OPTS="${GCC_OPTS} ${CFLAGS_FOR_GOTOS}" ;;
    false)      ;;
esac

# If sanitizers were enabled at configure time, add CFLAGS_FOR_SANITIZERS.
SANITIZER_OPTS="${CFLAGS_FOR_SANITIZERS}"

# Use any applicable LTO options
LTO_OPTS="${CFLAGS_FOR_LTO}"

#
# Special case hacks for particular architectures
# Any code here needs to be duplicated in ../configure.ac.
#

ARCH_OPTS=""

# XXX gcc generates warnings about possibly uninitialized variables in
# high-level C code. clang would, too, if we did not suppress all warnings.
case "${COMPILER},${highlevel_code}" in
    gcc,true)
        CHECK_OPTS="${CHECK_OPTS} -Wno-uninitialized"
        ;;
esac

case "${FULLARCH}" in
    i*86-*|x86_64*)
        # The use of stack_pointer in the ASM_JUMP macro defined in
        # runtime/mercury_goto.h causes lots of warnings about using possibly
        # uninitialized variables; there's no easy way to suppress them except
        # by disabling the warning.
        case "${COMPILER},${highlevel_code}" in
            gcc,false)
                CHECK_OPTS="${CHECK_OPTS} -Wno-uninitialized"
                ;;
        esac
        ;;
esac
# gcc versions 9-12 replace calls to strcmp and related functions with
# specialised code when some of the arguments are string constants.
# The above versions of gcc emit spurious warnings about the code they
# introduce when -Warray-bounds is enabled.
# We currently disable the warning for all versions of GCC > 8 since
# the problem is not known to have been fixed in any later version (as of
# 2022-06-18).

case "${C_COMPILER_TYPE}" in
    gcc_9_*|gcc_1[0-9]_*)
        CHECK_OPTS="${CHECK_OPTS} -Wno-array-bounds"
    ;;
esac

case ${COMPILER} in gcc)
    case "${FULLARCH}" in
        i*86*)
            case "$*" in
            # Workarounds for internal problems with GCC in asm_fast.gc
            # on i*86. Reported against gcc 4.4.5 and 4.6.0.
            *" ml_backend.ml_closure_gen.c "*)
                ARCH_OPTS="${ARCH_OPTS} -O0"
                ;;
            *" ml_backend.ml_unify_gen.c "*)
                ARCH_OPTS="${ARCH_OPTS} -O0"
                ;;
            *" ml_backend.rtti_to_mlds.c "*)
                ARCH_OPTS="${ARCH_OPTS} -O0"
                ;;
            *" display_report.c "*)
                ARCH_OPTS="${ARCH_OPTS} -O0"
                ;;
            # Workaround for a internal compiler error with GCC 4.8
            # in grades that use global registers.
            *" mercury_ho_call.c "*)
                case ${global_regs} in true)
                    ARCH_OPTS="${ARCH_OPTS} -O0"
                    ;;
                esac
                ;;
            esac
            ;;
    esac
    ;;
esac

# On sparc-sun-solaris2, we need to use -fPIC rather than -fpic,
# because otherwise the Mercury standard library overflows the fixed limit
# on the number of "small pic" references.
# Similarly, on sparc64 OpenBSD, no grades fit into the 13-bit GOT.

case "${FULLARCH}" in
    sparc-sun-solaris2*|sparc64*-openbsd*)
        case "$*" in
            *-fpic*)
                echo "mgnuc: using -fPIC rather than -fpic"
                OVERRIDE_OPTS="${OVERRIDE_OPTS} -fPIC"
                ;;
        esac
        ;;
esac

# Using global register variables triggers an internal error in the LRA pass of
# GCC 9.1 and 9.2 on x86_64 systems in debug grades unless we compile at -O0.
# See: <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91430>
#
# Changes to this need to be reflected in the predicate
# gather_c_compiler_flags/3 in compiler/compile_target_code.m.

case "${FULLARCH}" in x86_64*)
    case ${global_regs},${debug} in
        true,true)
            case "${C_COMPILER_TYPE}" in
                gcc_9_*)
                    ARCH_OPTS="${ARCH_OPTS} -O0"
                    ;;
            esac
            ;;
    esac
    ;;
esac

# At -O2 compilation times on Mac OS X are extremely slow for
# Apple GCC 4.{0,2}. We must force GCC to use -O0 here in order
# to get acceptable compilation times.
# Changes to this need to be reflected in the predicate 
# gather_c_compiler_flags/3 in compiler/compile_target_code.m.

case ${FULLARCH} in
    *apple*darwin*)
        case ${debug} in
            true)
                case ${COMPILER} in
                    gcc)
                        OVERRIDE_OPTS="${OVERRIDE_OPTS} -O0"
                        ;;
                esac
                ;;
        esac
        ;;
esac

if test -r .mgnuc_copts
then
    INVISIBLE_OPTS=`cat .mgnuc_copts`
else
    INVISIBLE_OPTS=""
fi

FILTERCC=""
case ${asm_labels},${do_filter_cc} in
    true,true)
        # Check if mfiltercc is available, as we may be bootstrapping with
        # an older compiler which did not have it.
        if test -n "${MKTEMP}" && mfiltercc </dev/null 2>/dev/null
        then
            FILTERCC="mfiltercc"
        fi
    ;;
esac

ALL_CC_OPTS="${MERC_ALL_C_INCL_DIRS}\
    ${CHECK_OPTS}\
    ${OPT_OPTS}\
    ${LTO_OPTS}\
    ${HLC_OPTS}\
    ${GCC_OPTS}\
    ${HALT_AT_WARN_OPT}\
    ${MSVCRT_OPTS}\
    ${GC_OPTS}\
    ${DEFINE_OPTS}\
    ${STACK_TRACE_OPTS}\
    ${TRACE_OPTS}\
    ${DECL_DEBUG_OPTS}\
    ${SS_DEBUG_OPTS}\
    ${TARGET_DEBUG_GRADE_OPTS}\
    ${EXTEND_STACKS_OPTS}\
    ${STACK_SEGMENTS_OPTS}\
    ${MGNUC_C_DEBUG_OPTS}\
    ${PROF_TIME_OPTS}\
    ${PROF_CALLS_OPTS}\
    ${PROF_MEMORY_OPTS}\
    ${PROF_DEEP_OPTS}\
    ${INLINE_ALLOC_OPTS}\
    ${TRAIL_OPTS}\
    ${RECORD_TERM_SIZE_OPTS}\
    ${MINIMAL_MODEL_OPTS}\
    ${PREGEN_SPF_OPTS}\
    ${SANITIZER_OPTS}\
    ${SPLIT_OPTS}\
    ${THREAD_OPTS}\
    ${THREADSCOPE_OPTS}\
    ${REGION_OPTS}\
    ${ARCH_OPTS}\
    ${FN_ALIGN_OPTS}\
    ${INVISIBLE_OPTS}"

case $# in
    0)
        set ${CC} ${ALL_CC_OPTS} ${OVERRIDE_OPTS}
        ;;
    *)
        set ${CC} ${ALL_CC_OPTS} "$@" ${OVERRIDE_OPTS} ${ALL_LOCAL_C_INCL_DIRS}
        ;;
esac

case ${verbose} in
    true)
        echo "$@"
        ;;
esac

if test -z "${FILTERCC}"
then
    exec "$@"
fi

# mktemp should give its own error message.
tmp=`${MKTEMP} ${TMPDIR}/mgnuc.XXXXXX` || exit 1
trap 'status=$?; rm -f ${tmp}; exit ${status}' 0 1 2 3 13 15
"$@" 2> ${tmp}
status=$?
"${FILTERCC}" < ${tmp} >&2
exit ${status}