configure.sh - platform/external/bc - Gitiles

 #! /bin/sh
 #
 # Copyright 2018 Gavin D. Howard
 #
 # Permission to use, copy, modify, and/or distribute this software for any
 # purpose with or without fee is hereby granted.
 #
 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
 # REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 # AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
 # INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 # LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 # OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 # PERFORMANCE OF THIS SOFTWARE.
 #

 usage() {

 	if [ $# -gt 0 ]; then

 		val=1

 		echo "$1"
 		echo ""

 	else
 		val=0
 	fi

 	echo "usage: $0 [-b|-d|-c] [-hHS] [-g(-m|-r)|-N] [-k KARATSUBA_LEN]"
 	echo ""
 	echo "    -b"
 	echo "        Build bc only. It is an error if \"-d\" is specified too."
 	echo "    -c"
 	echo "        Generate test coverage code. Requires gcov and regcovr."
 	echo "        It is an error if either \"-b\" or \"-d\" is specified."
 	echo "        Implies \"-N\"."
 	echo "    -d"
 	echo "        Build dc only. It is an error if \"-b\" is specified too."
 	echo "    -g"
 	echo "        Build in debug mode."
 	echo "    -h"
 	echo "        Print this help message and exit."
 	echo "    -H"
 	echo "        Disable history (currently not implemented)."
 	echo "    -k KARATSUBA_LEN"
 	echo "        Set the karatsuba length to KARATSUBA_LEN (default is 32)."
 	echo "        It is an error if KARATSUBA_LEN is not a number or is less than 2."
 	echo "    -m"
 	echo "        Enable minimum-size release flags (-Os -DNDEBUG -s)."
 	echo "        It is an error if \"-r\" or \"-g\" are specified too."
 	echo "    -N"
 	echo "        Disable default CFLAGS. It is an error to specify this option"
 	echo "        with any of \"-g\", \"-m\", or \"-r\"."
 	echo "    -r"
 	echo "        Enable default release flags (-O3 -DNDEBUG -s). On by default."
 	echo "        If given with \"-g\", a debuggable release will be built."
 	echo "        It is an error if \"-m\" is specified too."
 	echo "    -S"
 	echo "        Disable signal handling. On by default."
 	echo ""
 	echo "In addition, the following environment variables are used:"
 	echo ""
 	echo "    CC        C compiler. Must be either gcc or clang."
 	echo "    HOSTCC    Host C compiler."
 	echo "    CFLAGS    C compiler flags. You can use this for extra optimization flags."
 	echo "    CPPFLAGS  C preprocessor flags."
 	echo "    LDFLAGS   Linker flags."
 	echo "    PREFIX    the prefix to install to. Default is /usr/local."
 	echo "              If PREFIX is \"/usr\", install path will be \"/usr/bin\"."
 	echo "    DESTDIR   For package creation."
 	echo "    GEN_EMU   Emulator to run string generator code under"
 	echo "              (leave empty if not necessary)."
 	exit "$val"
 }

 err_exit() {

 	if [ "$#" -ne 1 ]; then
 		echo "Invalid number of args to err_exit"
 		exit 1
 	fi

 	echo "$1"
 	exit 1
 }

 replace_ext() {

 	if [ "$#" -ne 3 ]; then
 		err_exit "Invalid number of args to $0"
 	fi

 	file="$1"
 	ext1="$2"
 	ext2="$3"

 	result=$(echo "$file" | sed -e "s@\.$ext1@\.$ext2@")

 	echo "$result"
 }

 replace_exts() {

 	if [ "$#" -ne 3 ]; then
 		err_exit "Invalid number of args to $0"
 	fi

 	files="$1"
 	ext1="$2"
 	ext2="$3"

 	for file in $files; do
 		new_name=$(replace_ext "$file" "$ext1" "$ext2")
 		result="$result $new_name"
 	done

 	echo "$result"
 }

 replace() {

 	if [ "$#" -ne 3 ]; then
 		err_exit "Invalid number of args to $0"
 	fi

 	str="$1"
 	needle="$2"
 	replacement="$3"

 	result=$(printf '%s' "$str" | sed -e "s!%%$needle%%!$replacement!g")

 	echo "$result"
 }

 gen_file_lists() {

 	if [ "$#" -ne 3 ]; then
 		err_exit "Invalid number of args to $0"
 	fi

 	contents="$1"
 	filedir="$2"
 	typ="$3"

 	needle="${typ}SRC"
 	replacement=$(ls $filedir/*.c | tr '\n' ' ')

 	contents=$(replace "$contents" "$needle" "$replacement")

 	needle="${typ}OBJ"
 	replacement=$(replace_exts "$replacement" "c" "o")

 	contents=$(replace "$contents" "$needle" "$replacement")

 	needle="${typ}GCDA"
 	replacement=$(replace_exts "$replacement" "o" "gcda")

 	contents=$(replace "$contents" "$needle" "$replacement")

 	needle="${typ}GCNO"
 	replacement=$(replace_exts "$replacement" "gcda" "gcno")

 	contents=$(replace "$contents" "$needle" "$replacement")

 	echo "$contents"
 }

 bc_only=0
 dc_only=0
 coverage=0
 karatsuba_len=32
 min_size=0
 debug=0
 release=0
 signals=1
 hist=1
 none=0

 while getopts "bcdghHk:mNrS" opt; do

 	case "$opt" in
 		b) bc_only=1 ;;
 		c) coverage=1 ; none=1 ;;
 		d) dc_only=1 ;;
 		g) debug=1 ;;
 		h) usage ;;
 		H) hist=0 ;;
 		k) karatsuba_len="$OPTARG" ;;
 		m) min_size=1 ;;
 		N) none=1 ;;
 		r) release=1 ;;
 		S) signals=0 ;;
 		t) hist=1 ;;
 		?) usage "Invalid option" ;;
 	esac

 done

 if [ "$bc_only" -eq 1 -a "$dc_only" -eq 1 ]; then
 	usage "Can only specify one of -b or -d"
 fi

 case $karatsuba_len in
 	(*[!0-9]*|'') usage "KARATSUBA_LEN is not a number" ;;
 	(*) ;;
 esac

 if [ "$karatsuba_len" -lt 2 ]; then
 	usage "KARATSUBA_LEN is less than 2"
 fi

 if [ "$release" -eq 1 -a "$min_size" -eq 1 ]; then
 	usage "Can only specify one of -r or -m"
 fi

 if [ "$none" -eq 1 ]; then

 	if [ "$release" -eq 1 -o "$min_size" -eq 1 -o "$debug" -eq 1 ]; then
 		usage "Cannot specify -N (or -c) with -r, -m, or -g"
 	fi

 fi

 set -e

 script="$0"

 scriptdir=$(dirname "$script")

 contents=$(cat "$scriptdir/Makefile.in")

 needle="WARNING"
 replacement="# *** WARNING: Autogenerated from Makefile.in. DO NOT MODIFY ***\n#"

 contents=$(replace "$contents" "$needle" "$replacement")

 contents=$(gen_file_lists "$contents" "$scriptdir/src" "")
 contents=$(gen_file_lists "$contents" "$scriptdir/src/bc" "BC_")
 contents=$(gen_file_lists "$contents" "$scriptdir/src/dc" "DC_")

 link="@echo \"No link necessary\""
 main_exec="BC_EXEC"

 bc_test="tests/all.sh bc"
 dc_test="tests/all.sh dc"

 timeconst="tests/bc/timeconst.sh"

 # In order to have cleanup at exit, we need to be in
 # debug mode, so don't run valgrind without that.
 if [ "$debug" -ne 0 ]; then
 	vg_bc_test="tests/all.sh bc valgrind \$(VALGRIND_ARGS) \$(BC_EXEC)"
 	vg_dc_test="tests/all.sh dc valgrind \$(VALGRIND_ARGS) \$(DC_EXEC)"
 	timeconst_vg="echo \"100\" | valgrind \$(VALGRIND_ARGS) \$(BC_EXEC) tests/bc/scripts/timeconst.bc"
 else
 	vg_bc_test="@echo \"Cannot run valgrind without debug flags\""
 	vg_dc_test="@echo \"Cannot run valgrind without debug flags\""
 	timeconst_vg="@echo \"Cannot run valgrind without debug flags\""
 fi

 karatsuba="@echo \"karatsuba cannot be run because one of bc or dc is not built\""
 karatsuba_test="@echo \"karatsuba cannot be run because one of bc or dc is not built\""

 if [ "$bc_only" -eq 1 ]; then

 	bc=1
 	dc=0

 	executables="bc"

 	dc_test="@echo \"No dc tests to run\""
 	vg_dc_test="@echo \"No dc tests to run\""

 elif [ "$dc_only" -eq 1 ]; then

 	bc=0
 	dc=1

 	executables="dc"

 	main_exec="DC_EXEC"

 	bc_test="@echo \"No bc tests to run\""
 	vg_bc_test="@echo \"No bc tests to run\""

 	timeconst="@echo \"timeconst cannot be run because bc is not built\""
 	timeconst_vg="@echo \"timeconst cannot be run because bc is not built\""

 else

 	bc=1
 	dc=1

 	executables="bc and dc"

 	link="\$(LINK) \$(BIN) \$(DC)"

 	karatsuba="\$(KARATSUBA)"
 	karatsuba_test="\$(KARATSUBA) 100 \$(BC_EXEC)"

 fi

 if [ "$debug" -eq 1 ]; then

 	CFLAGS="$CFLAGS -g -fno-omit-frame-pointer"

 	if [ "$release" -ne 1 -a "$min_size" -ne 1 ]; then
 		CFLAGS="$CFLAGS -O0"
 	fi
 else
 	CPPFLAGS="$CPPFLAGS -DNDEBUG"
 	LDFLAGS="$LDFLAGS -s"
 fi

 if [ "$release" -eq 1 -o "$none" -eq 0 ]; then
 	if [ "$debug" -ne 1 ]; then
 		CFLAGS="$CFLAGS -O3"
 	fi
 fi

 if [ "$min_size" -eq 1 ]; then
 	CFLAGS="$CFLAGS -Os"
 fi

 if [ "$coverage" -eq 1 ]; then

 	if [ "$bc_only" -eq 1 -o "$dc_only" -eq 1 ]; then
 		usage "Can only specify -c without -b or -d"
 	fi

 	CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage -g -O0"
 	CPPFLAGS="$CPPFLAGS -DNDEBUG"

 	COVERAGE="gcov -pabcdf \$(GCDA) \$(BC_GCDA) \$(DC_GCDA)"
 	COVERAGE="$COVERAGE;\$(RM) -f \$(GEN)*.gc*"
 	COVERAGE="$COVERAGE;regcovr --html-details --output index.html"
 	COVERAGE_PREREQS="all test_all"

 else

 	COVERAGE="@echo \"Coverage not generated\""
 	COVERAGE_PREREQS=""

 fi

 if [ "$PREFIX" = "" ]; then
 	PREFIX="/usr/local"
 fi

 gcc="gcc"
 clang="clang"

 if [ "$CC" = "" ]; then
 	CC="c99"
 fi

 if [ "$HOSTCC" = "" ]; then
 	HOSTCC="$CC"
 fi

 contents=$(replace "$contents" "BC_ENABLED" "$bc")
 contents=$(replace "$contents" "DC_ENABLED" "$dc")
 contents=$(replace "$contents" "LINK" "$link")

 contents=$(replace "$contents" "SIGNALS" "$signals")
 contents=$(replace "$contents" "HISTORY" "$hist")
 contents=$(replace "$contents" "KARATSUBA_LEN" "$karatsuba_len")

 contents=$(replace "$contents" "PREFIX" "$PREFIX")
 contents=$(replace "$contents" "DESTDIR" "$DESTDIR")
 contents=$(replace "$contents" "CFLAGS" "$CFLAGS")
 contents=$(replace "$contents" "CPPFLAGS" "$CPPFLAGS")
 contents=$(replace "$contents" "LDFLAGS" "$LDFLAGS")
 contents=$(replace "$contents" "CC" "$CC")
 contents=$(replace "$contents" "HOSTCC" "$HOSTCC")
 contents=$(replace "$contents" "COVERAGE" "$COVERAGE")
 contents=$(replace "$contents" "COVERAGE_PREREQS" "$COVERAGE_PREREQS")

 contents=$(replace "$contents" "EXECUTABLES" "$executables")
 contents=$(replace "$contents" "MAIN_EXEC" "$main_exec")

 contents=$(replace "$contents" "BC_TEST" "$bc_test")
 contents=$(replace "$contents" "DC_TEST" "$dc_test")

 contents=$(replace "$contents" "VG_BC_TEST" "$vg_bc_test")
 contents=$(replace "$contents" "VG_DC_TEST" "$vg_dc_test")

 contents=$(replace "$contents" "TIMECONST_TARGET" "$timeconst_target")
 contents=$(replace "$contents" "TIMECONST" "$timeconst")

 contents=$(replace "$contents" "TIMECONST_VG_TARGET" "$timeconst_vg_target")
 contents=$(replace "$contents" "TIMECONST_VG" "$timeconst_vg")

 contents=$(replace "$contents" "KARATSUBA" "$karatsuba")
 contents=$(replace "$contents" "KARATSUBA_TEST" "$karatsuba_test")

 contents=$(printf '%s' "$contents" | sed -e "s!\n\n!\n!g")

 echo "$contents" > "$scriptdir/Makefile"

 cd "$scriptdir"

 make clean > /dev/null

 echo "Testing C compilers..."

 libname=$(make libcname)

 set +e

 make "$libname" > /dev/null 2>&1

 err="$?"

 if [ "$err" -ne 0 ]; then
 	usage "\nHOSTCC ($HOSTCC) is not compatible with gcc/clang options"
 fi

 make > /dev/null 2>&1

 err="$?"

 if [ "$err" -ne 0 ]; then
 	usage "\nCC ($HOSTCC) is not compatible with gcc/clang options"
 fi
	#! /bin/sh
	#
	# Copyright 2018 Gavin D. Howard
	#
	# Permission to use, copy, modify, and/or distribute this software for any
	# purpose with or without fee is hereby granted.
	#
	# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
	# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
	# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
	# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
	# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
	# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
	# PERFORMANCE OF THIS SOFTWARE.
	#

	usage() {

	if [ $# -gt 0 ]; then

	val=1

	echo "$1"
	echo ""

	else
	val=0
	fi

	echo "usage: $0 [-b\|-d\|-c] [-hHS] [-g(-m\|-r)\|-N] [-k KARATSUBA_LEN]"
	echo ""
	echo " -b"
	echo " Build bc only. It is an error if \"-d\" is specified too."
	echo " -c"
	echo " Generate test coverage code. Requires gcov and regcovr."
	echo " It is an error if either \"-b\" or \"-d\" is specified."
	echo " Implies \"-N\"."
	echo " -d"
	echo " Build dc only. It is an error if \"-b\" is specified too."
	echo " -g"
	echo " Build in debug mode."
	echo " -h"
	echo " Print this help message and exit."
	echo " -H"
	echo " Disable history (currently not implemented)."
	echo " -k KARATSUBA_LEN"
	echo " Set the karatsuba length to KARATSUBA_LEN (default is 32)."
	echo " It is an error if KARATSUBA_LEN is not a number or is less than 2."
	echo " -m"
	echo " Enable minimum-size release flags (-Os -DNDEBUG -s)."
	echo " It is an error if \"-r\" or \"-g\" are specified too."
	echo " -N"
	echo " Disable default CFLAGS. It is an error to specify this option"
	echo " with any of \"-g\", \"-m\", or \"-r\"."
	echo " -r"
	echo " Enable default release flags (-O3 -DNDEBUG -s). On by default."
	echo " If given with \"-g\", a debuggable release will be built."
	echo " It is an error if \"-m\" is specified too."
	echo " -S"
	echo " Disable signal handling. On by default."
	echo ""
	echo "In addition, the following environment variables are used:"
	echo ""
	echo " CC C compiler. Must be either gcc or clang."
	echo " HOSTCC Host C compiler."
	echo " CFLAGS C compiler flags. You can use this for extra optimization flags."
	echo " CPPFLAGS C preprocessor flags."
	echo " LDFLAGS Linker flags."
	echo " PREFIX the prefix to install to. Default is /usr/local."
	echo " If PREFIX is \"/usr\", install path will be \"/usr/bin\"."
	echo " DESTDIR For package creation."
	echo " GEN_EMU Emulator to run string generator code under"
	echo " (leave empty if not necessary)."
	exit "$val"
	}

	err_exit() {

	if [ "$#" -ne 1 ]; then
	echo "Invalid number of args to err_exit"
	exit 1
	fi

	echo "$1"
	exit 1
	}

	replace_ext() {

	if [ "$#" -ne 3 ]; then
	err_exit "Invalid number of args to $0"
	fi

	file="$1"
	ext1="$2"
	ext2="$3"

	result=$(echo "$file" \| sed -e "s@\.$ext1@\.$ext2@")

	echo "$result"
	}

	replace_exts() {

	if [ "$#" -ne 3 ]; then
	err_exit "Invalid number of args to $0"
	fi

	files="$1"
	ext1="$2"
	ext2="$3"

	for file in $files; do
	new_name=$(replace_ext "$file" "$ext1" "$ext2")
	result="$result $new_name"
	done

	echo "$result"
	}

	replace() {

	if [ "$#" -ne 3 ]; then
	err_exit "Invalid number of args to $0"
	fi

	str="$1"
	needle="$2"
	replacement="$3"

	result=$(printf '%s' "$str" \| sed -e "s!%%$needle%%!$replacement!g")

	echo "$result"
	}

	gen_file_lists() {

	if [ "$#" -ne 3 ]; then
	err_exit "Invalid number of args to $0"
	fi

	contents="$1"
	filedir="$2"
	typ="$3"

	needle="${typ}SRC"
	replacement=$(ls $filedir/*.c \| tr '\n' ' ')

	contents=$(replace "$contents" "$needle" "$replacement")

	needle="${typ}OBJ"
	replacement=$(replace_exts "$replacement" "c" "o")

	contents=$(replace "$contents" "$needle" "$replacement")

	needle="${typ}GCDA"
	replacement=$(replace_exts "$replacement" "o" "gcda")

	contents=$(replace "$contents" "$needle" "$replacement")

	needle="${typ}GCNO"
	replacement=$(replace_exts "$replacement" "gcda" "gcno")

	contents=$(replace "$contents" "$needle" "$replacement")

	echo "$contents"
	}

	bc_only=0
	dc_only=0
	coverage=0
	karatsuba_len=32
	min_size=0
	debug=0
	release=0
	signals=1
	hist=1
	none=0

	while getopts "bcdghHk:mNrS" opt; do

	case "$opt" in
	b) bc_only=1 ;;
	c) coverage=1 ; none=1 ;;
	d) dc_only=1 ;;
	g) debug=1 ;;
	h) usage ;;
	H) hist=0 ;;
	k) karatsuba_len="$OPTARG" ;;
	m) min_size=1 ;;
	N) none=1 ;;
	r) release=1 ;;
	S) signals=0 ;;
	t) hist=1 ;;
	?) usage "Invalid option" ;;
	esac

	done

	if [ "$bc_only" -eq 1 -a "$dc_only" -eq 1 ]; then
	usage "Can only specify one of -b or -d"
	fi

	case $karatsuba_len in
	([!0-9]\|'') usage "KARATSUBA_LEN is not a number" ;;
	(*) ;;
	esac

	if [ "$karatsuba_len" -lt 2 ]; then
	usage "KARATSUBA_LEN is less than 2"
	fi

	if [ "$release" -eq 1 -a "$min_size" -eq 1 ]; then
	usage "Can only specify one of -r or -m"
	fi

	if [ "$none" -eq 1 ]; then

	if [ "$release" -eq 1 -o "$min_size" -eq 1 -o "$debug" -eq 1 ]; then
	usage "Cannot specify -N (or -c) with -r, -m, or -g"
	fi

	fi

	set -e

	script="$0"

	scriptdir=$(dirname "$script")

	contents=$(cat "$scriptdir/Makefile.in")

	needle="WARNING"
	replacement="# * WARNING: Autogenerated from Makefile.in. DO NOT MODIFY *\n#"

	contents=$(replace "$contents" "$needle" "$replacement")

	contents=$(gen_file_lists "$contents" "$scriptdir/src" "")
	contents=$(gen_file_lists "$contents" "$scriptdir/src/bc" "BC_")
	contents=$(gen_file_lists "$contents" "$scriptdir/src/dc" "DC_")

	link="@echo \"No link necessary\""
	main_exec="BC_EXEC"

	bc_test="tests/all.sh bc"
	dc_test="tests/all.sh dc"

	timeconst="tests/bc/timeconst.sh"

	# In order to have cleanup at exit, we need to be in
	# debug mode, so don't run valgrind without that.
	if [ "$debug" -ne 0 ]; then
	vg_bc_test="tests/all.sh bc valgrind \$(VALGRIND_ARGS) \$(BC_EXEC)"
	vg_dc_test="tests/all.sh dc valgrind \$(VALGRIND_ARGS) \$(DC_EXEC)"
	timeconst_vg="echo \"100\" \| valgrind \$(VALGRIND_ARGS) \$(BC_EXEC) tests/bc/scripts/timeconst.bc"
	else
	vg_bc_test="@echo \"Cannot run valgrind without debug flags\""
	vg_dc_test="@echo \"Cannot run valgrind without debug flags\""
	timeconst_vg="@echo \"Cannot run valgrind without debug flags\""
	fi

	karatsuba="@echo \"karatsuba cannot be run because one of bc or dc is not built\""
	karatsuba_test="@echo \"karatsuba cannot be run because one of bc or dc is not built\""

	if [ "$bc_only" -eq 1 ]; then

	bc=1
	dc=0

	executables="bc"

	dc_test="@echo \"No dc tests to run\""
	vg_dc_test="@echo \"No dc tests to run\""

	elif [ "$dc_only" -eq 1 ]; then

	bc=0
	dc=1

	executables="dc"

	main_exec="DC_EXEC"

	bc_test="@echo \"No bc tests to run\""
	vg_bc_test="@echo \"No bc tests to run\""

	timeconst="@echo \"timeconst cannot be run because bc is not built\""
	timeconst_vg="@echo \"timeconst cannot be run because bc is not built\""

	else

	bc=1
	dc=1

	executables="bc and dc"

	link="\$(LINK) \$(BIN) \$(DC)"

	karatsuba="\$(KARATSUBA)"
	karatsuba_test="\$(KARATSUBA) 100 \$(BC_EXEC)"

	fi

	if [ "$debug" -eq 1 ]; then

	CFLAGS="$CFLAGS -g -fno-omit-frame-pointer"

	if [ "$release" -ne 1 -a "$min_size" -ne 1 ]; then
	CFLAGS="$CFLAGS -O0"
	fi
	else
	CPPFLAGS="$CPPFLAGS -DNDEBUG"
	LDFLAGS="$LDFLAGS -s"
	fi

	if [ "$release" -eq 1 -o "$none" -eq 0 ]; then
	if [ "$debug" -ne 1 ]; then
	CFLAGS="$CFLAGS -O3"
	fi
	fi

	if [ "$min_size" -eq 1 ]; then
	CFLAGS="$CFLAGS -Os"
	fi

	if [ "$coverage" -eq 1 ]; then

	if [ "$bc_only" -eq 1 -o "$dc_only" -eq 1 ]; then
	usage "Can only specify -c without -b or -d"
	fi

	CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage -g -O0"
	CPPFLAGS="$CPPFLAGS -DNDEBUG"

	COVERAGE="gcov -pabcdf \$(GCDA) \$(BC_GCDA) \$(DC_GCDA)"
	COVERAGE="$COVERAGE;\$(RM) -f \$(GEN).gc"
	COVERAGE="$COVERAGE;regcovr --html-details --output index.html"
	COVERAGE_PREREQS="all test_all"

	else

	COVERAGE="@echo \"Coverage not generated\""
	COVERAGE_PREREQS=""

	fi

	if [ "$PREFIX" = "" ]; then
	PREFIX="/usr/local"
	fi

	gcc="gcc"
	clang="clang"

	if [ "$CC" = "" ]; then
	CC="c99"
	fi

	if [ "$HOSTCC" = "" ]; then
	HOSTCC="$CC"
	fi

	contents=$(replace "$contents" "BC_ENABLED" "$bc")
	contents=$(replace "$contents" "DC_ENABLED" "$dc")
	contents=$(replace "$contents" "LINK" "$link")

	contents=$(replace "$contents" "SIGNALS" "$signals")
	contents=$(replace "$contents" "HISTORY" "$hist")
	contents=$(replace "$contents" "KARATSUBA_LEN" "$karatsuba_len")

	contents=$(replace "$contents" "PREFIX" "$PREFIX")
	contents=$(replace "$contents" "DESTDIR" "$DESTDIR")
	contents=$(replace "$contents" "CFLAGS" "$CFLAGS")
	contents=$(replace "$contents" "CPPFLAGS" "$CPPFLAGS")
	contents=$(replace "$contents" "LDFLAGS" "$LDFLAGS")
	contents=$(replace "$contents" "CC" "$CC")
	contents=$(replace "$contents" "HOSTCC" "$HOSTCC")
	contents=$(replace "$contents" "COVERAGE" "$COVERAGE")
	contents=$(replace "$contents" "COVERAGE_PREREQS" "$COVERAGE_PREREQS")

	contents=$(replace "$contents" "EXECUTABLES" "$executables")
	contents=$(replace "$contents" "MAIN_EXEC" "$main_exec")

	contents=$(replace "$contents" "BC_TEST" "$bc_test")
	contents=$(replace "$contents" "DC_TEST" "$dc_test")

	contents=$(replace "$contents" "VG_BC_TEST" "$vg_bc_test")
	contents=$(replace "$contents" "VG_DC_TEST" "$vg_dc_test")

	contents=$(replace "$contents" "TIMECONST_TARGET" "$timeconst_target")
	contents=$(replace "$contents" "TIMECONST" "$timeconst")

	contents=$(replace "$contents" "TIMECONST_VG_TARGET" "$timeconst_vg_target")
	contents=$(replace "$contents" "TIMECONST_VG" "$timeconst_vg")

	contents=$(replace "$contents" "KARATSUBA" "$karatsuba")
	contents=$(replace "$contents" "KARATSUBA_TEST" "$karatsuba_test")

	contents=$(printf '%s' "$contents" \| sed -e "s!\n\n!\n!g")

	echo "$contents" > "$scriptdir/Makefile"

	cd "$scriptdir"

	make clean > /dev/null

	echo "Testing C compilers..."

	libname=$(make libcname)

	set +e

	make "$libname" > /dev/null 2>&1

	err="$?"

	if [ "$err" -ne 0 ]; then
	usage "\nHOSTCC ($HOSTCC) is not compatible with gcc/clang options"
	fi

	make > /dev/null 2>&1

	err="$?"

	if [ "$err" -ne 0 ]; then
	usage "\nCC ($HOSTCC) is not compatible with gcc/clang options"
	fi