radare2/configure

#!/bin/sh
# This script was automatically generated by ACR v1.2
# @author: pancake <nopcode.org>
# @url:    http://www.nopcode.org
# @repo:   git clone https://github.com/radare/acr

do_remove() {
if [ "${ACR_RMFILES}" ]; then
  printf "cleaning temporally files... "
  rm -f ${ACR_RMFILES}
  echo "done"
fi
}
control_c() {
  printf "\n\n^C control-c : script execution interrupted.\n"
  do_remove
  exit 1
}
trap control_c 2
DEBUGGER=1
USE_MAGIC=0
LOADLIBS=1
HAVE_FORK=1
HAVE_JEMALLOC=1
WITH_CAPSTONE=0
USE_ZIP=0
WITH_GPL=1
WANT_OPENSSL=0
USE_RPATH=0
[ -z "${USERCC}" ] && USERCC="gcc"
[ -z "${USEROSTYPE}" ] && USEROSTYPE="auto"
WITHPIC=1
WITHNONPIC=0
[ -z "${LIBVERSION}" ] && LIBVERSION="xxx"
split_host() {
S="$"
while : ; do
ENVWORDS="${ENVWORDS} $1_CPU $1_OS"
STR=`eval "echo ${S}$1"`
SPLIT_CPU="`echo "$STR" | cut -d - -f 1`"
SPLIT_OS="`echo "$STR" | awk -F - '{
	if ($2=="unknown"){
		if (NF<3) { print $2; } else { print $3; }
	} else {
		if ($2=="linux") { print $2; } else
		if (NF<3) { print $2; } else { print $3; }
	}
}'`"
eval "$1_CPU=\"$SPLIT_CPU\""
eval "$1_OS=\"$SPLIT_OS\""
shift
[ -z "$1" ] && break
done
}

VPATH=`dirname ${0}`
if [ "${VPATH}" = "." ]; then 
	WODIS=current
else
	if [ "${VPATH}" = "${PWD}" ]; then
		VPATH=.
		WODIS=current
	else
		WODIS=crosspath
		CURDIR=$PWD
		cd $VPATH
		VPATH="${PWD}/"
		cd $CURDIR
	fi
fi

guess_os() {
if [ -e "${VPATH}/config.guess" ]; then
	sh ${VPATH}/config.guess
	return
fi
CPU="`uname -m|sed -e 's, ,,g'|cut -d - -f 1`"
OS="`uname -s|tr A-Z a-z`"
GNU="`uname --help 2>&1 | grep gnu`"
[ "${GNU}" ] && OS="${OS}-gnu"
[ "${CPU}" = ppc ] && CPU="powerpc"
echo "${CPU}-unknown-${OS}"
}

SEARCHPATH="/usr /usr/local /usr/pkg /sw"

: ${PREFIX:=/usr/local}
CROSSBUILD=0
BUILD=`guess_os`
HOST="${BUILD}"
TARGET="${HOST}"
SYSCONFDIR=""

create_environ() {
: ${EPREFIX:="${PREFIX}"}
: ${SPREFIX:="${PREFIX}"}
: ${BINDIR:="${SPREFIX}/bin"}
: ${SBINDIR:="${PREFIX}/sbin"}
: ${SYSCONFDIR:="${SPREFIX}/etc"}
: ${LIBDIR:="${SPREFIX}/lib"}
: ${LIBEXECDIR:="${SPREFIX}/libexec"}
: ${INCLUDEDIR:="${SPREFIX}/include"}
: ${DATADIR:="${SPREFIX}/share"}
: ${INFODIR:="${DATADIR}/info"}
: ${MANDIR:="${DATADIR}/man"}
: ${DOCDIR:="${DATADIR}/doc/radare2"}
: ${LOCALSTATEDIR:="${SPREFIX}/var"}
for A in `echo ${PATH} | sed -e 's,:, ,g'` ; do
  [ -e "$A"/ginstall ] && : ${INSTALL:="$A"/ginstall} && break
  [ -e "$A"/install ] && : ${INSTALL:="$A"/install} && break
done
: ${INSTALL_DIR:=${INSTALL} -d}
: ${INSTALL_DATA:=${INSTALL} -m 644}
: ${INSTALL_SCRIPT:=${INSTALL} -m 755}
: ${INSTALL_PROGRAM:=${INSTALL} -m 755}
: ${INSTALL_PROGRAM_STRIP:=${INSTALL} -m 755 -s}
: ${INSTALL_MAN:=${INSTALL} -m 444}
: ${INSTALL_LIB:=${INSTALL} -m 755 -c}
 PKGNAME='radare2' ; VERSION='1.7.0-git' ; CONTACT_MAIL="pancake@nopcode.org" ; CONTACT_NAME="pancake" ; CONTACT="pancake <pancake@nopcode.org>" ;
}
                
show_usage() {
cat <<EOF2
'configure' configures radare2-1.7.0-git to adapt to many kinds of systems.

Usage: ./configure [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.

Configuration:
  -h, --help              display this help and exit
  -r, --report            show what libs/programs require to work
  -V, --version           display version information and exit

Installation directories:
  --exec-prefix=EPREFIX  install arch-dependent files in EPREFIX [PREFIX]
  --prefix=PREFIX        install arch-independent files in PREFIX [/usr/local]
  --sandbox=SPREFIX      sandbox prefix directory: SPREFIX [PREFIX]

Fine tuning of the installation directories:
  --bindir=DIR           user executables [EPREFIX/bin]
  --datadir=DIR          read-only architecture-independent data [PREFIX/share]
  --docdir=DIR           documentation directory [DATADIR/doc/radare2]
  --includedir=DIR       C header files [PREFIX/include]
  --infodir=DIR          info documentation [DATADIR/info]
  --libexecdir=DIR       program executables [EPREFIX/libexec]
  --libdir=DIR           object code libraries [EPREFIX/lib]
  --libpath=DIR          set rpath/libname-path to linker
  --localstatedir=DIR    modifiable single-machine data [PREFIX/var]
  --mandir=DIR           man documentation [DATADIR/man]
  --sbindir=DIR          system admin executables [EPREFIX/sbin]
  --sysconfdir=DIR       read-only single-machine data [PREFIX/etc]
  --sharedstatedir=DIR   modifiable architecture-independent data [PREFIX/com]

System types:
  --build=BUILD          configure for building on BUILD [guessed]
  --host=HOST            cross-compile to build programs to run on HOST [BUILD]
  --target=TARGET        configure for building compilers for TARGET [HOST]
EOF2

printf "
Optional Features:
  --disable-debugger     disable native debugger features 
  --with-sysmagic        force to use system's magic 
  --disable-loadlibs     disable loading plugins 
  --without-fork         disable fork 
  --with-syscapstone     force to use system-wide capstone 
  --with-syszip          force to use system's libzip and zlib 
  --without-gpl          do not build GPL code (grub, cxx, ... ) 
  --with-openssl         build with openssl if possible 
  --with-rpath           use rpath to build 
  --with-compiler        Define compiler to use (see mk/)  (USERCC=gcc)
  --with-ostype          Choose OS type ( gnulinux windows darwin haiku )  (USEROSTYPE=auto)
  --without-pic          do not build libr as a program independent location 
  --with-nonpic          build the library archives .a 
  --with-libversion      specify different libversion  (LIBVERSION=xxx)
"
printf "
Some influential environment variables:
  CC          C compiler command
  CFLAGS      C compiler flags
  CPPFLAGS    C preprocessor flags
  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
              nonstandard directory <lib dir>
  CPPFLAGS    C/C++ preprocessor flags, e.g. -I<include dir> if you have
              headers in a nonstandard directory <include dir>
  CPP         C preprocessor
"
printf "
Report bugs to: pancake <pancake@nopcode.org>"
echo ""
exit 0
}

take_environ() {
: ${SH:=/bin/sh}
: ${CPP:=cpp}
: ${CC:=gcc}
: ${PREFIX:=/usr/local/}
}

show_version() {
echo "radare2-1.7.0-git configuration script done with acr v1.2.
The 'Free Software Foundation' message is only for autodetection.
Originally written by pancake <nopcode.org>."
exit 0
}

parse_options() {
flag=`echo $1| cut -d = -f 1`
value=`echo $1| awk 'BEGIN{FS="=";}{print $2}'`
flag2=`echo $flag|cut -f2- -d -| sed -e 's,-,_,g' -e 's,^_,,g'|tr '[a-z]' '[A-Z]'`

if [ "${TARGET_OS}" = "darwin" ]; then
	LIBPATH=-Wl,-install_name,
else
	LIBPATH=-Wl,-R
fi

case $flag in
-h|--help|--hel|--h|--he|-help)
	show_usage ; ;;
-V|-version|--version)
	show_version ; ;;
-r|--r|--report)
echo "PKGNAME:   radare2"
echo "VERSION:   1.7.0-git"
echo "LANGS:     c"
echo "REQUIRED:  libdl"
echo "OPTIONAL:  libmagic"
echo "PKG-CONFIG:  capstone openssl"
echo "FLAGS:     --disable-debugger --with-sysmagic --disable-loadlibs --without-fork --with-syscapstone --with-syszip --without-gpl --with-openssl --with-rpath --with-compiler=gcc --with-ostype=auto --without-pic --with-nonpic --with-libversion=xxx"
	exit 0
	;;
--cache-file) 
	# ignored: acr have no cache
	;;
--build)
	BUILD="$value"; split_host BUILD ; ;;
--host)
	CROSSBUILD=1 # XXX
	HOST="$value"; split_host HOST ; ;;
--target)
	TARGET="$value"; split_host TARGET ; ;;
--prefix)
	PREFIX="$value"; ;;
--exec-prefix)
	EPREFIX="$value"; ;;
--sandbox|--sprefix)
	SPREFIX="$value"; ;;
--bindir)
	BINDIR="$value"; ;;
--sbindir)
	SBINDIR="$value"; ;;
--libexecdir)
	LIBEXECDIR="$value"; ;;
--docdir)
	DOCDIR="$value"; ;;
--datadir)
	DATADIR="$value"; ;;
--sysconfdir)
	SYSCONFDIR="$value"; ;;
--sharedstatedir)
	SHAREDSTATEDIR="$value"; ;;
--localstatedir)
	LOCALSTATEDIR="$value"; ;;
--libdir)
	LIBDIR="$value"; ;;
--libpath)
	LDFLAGS="${LDFLAGS} ${LIBPATH}$value"; ;;
--includedir)
	INCLUDEDIR="$value"; CFLAGS="${CFLAGS} -I$value"; ;;
--infodir)
	INFODIR="$value"; ;;
--mandir)
	MANDIR="$value"; ;;

"--disable-debugger") DEBUGGER="0"; ;;
"--with-sysmagic") USE_MAGIC="1"; ;;
"--disable-loadlibs") LOADLIBS="0"; ;;
"--without-fork") HAVE_FORK="0"; ;;
"--without-jemalloc") HAVE_JEMALLOC="0"; ;;
"--with-syscapstone") WITH_CAPSTONE="1"; ;;
"--with-syszip") USE_ZIP="1"; ;;
"--without-gpl") WITH_GPL="0"; ;;
"--with-openssl") WANT_OPENSSL="1"; ;;
"--with-rpath") USE_RPATH="1"; ;;
--with-compiler) if [ -z "${value}" ]; then USERCC="gcc"; else USERCC="${value}" ; fi ;;
--with-ostype) if [ -z "${value}" ]; then USEROSTYPE="auto"; else USEROSTYPE="${value}" ; fi ;;
"--without-pic") WITHPIC="0"; ;;
"--with-nonpic") WITHNONPIC="1"; ;;
--with-libversion) if [ -z "${value}" ]; then LIBVERSION="xxx"; else LIBVERSION="${value}" ; fi ;;
*) if [ "$value" ]; then eval "`echo $flag2=$value`" ; 
else echo ; echo "WARNING: Unknown flag '$flag'." >&2 ; echo ; fi ;;
esac
}

# MAIN #
take_environ
split_host BUILD HOST TARGET
[ -z "$ACRHOOK" ] && ACRHOOK=./configure.hook
[ -e "$ACRHOOK" ] && . ${ACRHOOK}

while : ; do
[ -z "$1" ] && break
parse_options "$1"
shift
done

ENVWORDS="MANDIR INFODIR LIBDIR INCLUDEDIR LOCALSTATEDIR SYSCONFDIR DATADIR DOCDIR LIBEXECDIR SBINDIR BINDIR EPREFIX PREFIX SPREFIX TARGET HOST BUILD INSTALL INSTALL_LIB INSTALL_MAN INSTALL_PROGRAM INSTALL_PROGRAM_STRIP INSTALL_DIR INSTALL_SCRIPT INSTALL_DATA HOST_OS HOST_CPU BUILD_OS BUILD_CPU TARGET_OS TARGET_CPU PKGNAME VPATH VERSION CONTACT CONTACT_NAME CONTACT_MAIL CC CFLAGS CPPFLAGS LDFLAGS HAVE_LANG_C DEBUGGER HAVE_LIB_DL DL_LIBS HAVE_PATCH PATCH HAVE_GIT GIT HAVE_LIB_MAGIC USE_MAGIC USE_LIB_MAGIC LIBMAGIC LOADLIBS HAVE_FORK HAVE_JEMALLOC WITH_CAPSTONE CAPSTONE_CFLAGS CAPSTONE_LDFLAGS HAVE_PKGCFG_CAPSTONE USE_CAPSTONE HAVE_LIB_Z HAVE_LIB_ZIP USE_ZIP USE_LIB_ZIP LIBZIP WITH_GPL HAVE_LIB_GMP HAVE_LIB_SSL SSL_CFLAGS SSL_LDFLAGS HAVE_PKGCFG_OPENSSL HAVE_OPENSSL WANT_OPENSSL USE_RPATH USERCC USEROSTYPE WITHPIC WITHNONPIC LIBVERSION"

create_environ

echo "checking build system type... ${BUILD}"
echo "checking host system type... ${HOST}"
echo "checking target system type... ${TARGET}"
[ "${CROSSBUILD}" = 1 ] && echo "using crosscompilation mode."

#split_host BUILD HOST TARGET
[ -n "${prefix}" ] && PREFIX="${prefix}"
echo "checking for working directories... ${WODIS}"
echo "using prefix '${PREFIX}'"
ACR_RMFILES=" test.c a.out a.exe"

: 
COMPILER=CC
printf "checking for c compiler... "
HAVE_LANG_C=1
if [ "${CROSSBUILD}" = 1 ]; then
 (command -v ${HOST}-${CC} >/dev/null 2>&1)
 if [ $? = 0 ]; then CC="${HOST}-${CC}"; fi
fi
echo "int main(int argc, char **argv){return 0;}" > test.c
 (exec ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} test.c >/dev/null 2>&1)
if [ $? = 0 ]; then echo ${CC}; else
 echo no ; HAVE_LANG_C=0
do_remove
echo "ERROR: ${CC} cannot create executables" >&2 ;
exit 1 ; fi
printf "checking for dynamic library... "
HAVE_LIB_DL=0
for OS in gnulinux linux gnu/kfreebsd syllable sunos darwin beos solaris ; do
if [ "${HOST_OS}" = "${OS}" ]; then
	HAVE_LIB_DL=1
	break;
fi
done
if [ "${HAVE_LIB_DL}" = 1 ]; then
	DL_LIBS="-ldl"
	echo "required"
else
	DL_LIBS=""
	echo "libc"
fi
printf "checking for patch... "
if [ -x "${PATCH}" ]; then
	FIND=${PATCH}
else
	FIND=""
	IFS=:
	for A in ${PATH} ; do
		if [ -x "${A}/patch" ]; then
			FIND="${A}/patch"
			break;
		fi
	done
	unset IFS
fi
if [ -n "${FIND}" ]; then
	echo ${FIND};
HAVE_PATCH=1
	PATCH=${FIND}
else
	HAVE_PATCH=0
	PATCH=patch
echo no
	echo "error: This program is required." >&2
	exit 1 ; fi
printf "checking for git... "
if [ -x "${GIT}" ]; then
	FIND=${GIT}
else
	FIND=""
	IFS=:
	for A in ${PATH} ; do
		if [ -x "${A}/git" ]; then
			FIND="${A}/git"
			break;
		fi
	done
	unset IFS
fi
if [ -n "${FIND}" ]; then
	echo ${FIND};
HAVE_GIT=1
	GIT=${FIND}
else
	HAVE_GIT=0
	GIT=git
echo no ; fi
check_library() {
VAR=$1
S="$"
_REQUIRED=$3
_CHKLIB_NAME=$2
_CHKLIB_LIBS=$(echo "-l${_CHKLIB_NAME}" | sed 's,+, -l,g')
printf "checking for lib${_CHKLIB_NAME} ... "
echo "int main(int ac, char **av){return 0;}" > test.c
eval ${S}${COMPILER} ${CFLAGS} ${CPPFLAGS} ${CXXFLAGS} ${LDFLAGS} ${_CHKLIB_LIBS} test.c >/dev/null 2>&1
if [ $? = 0 ]; then
	eval ${VAR}=1
	echo yes
else
	eval ${VAR}=0
	echo no  ; fi }
check_library HAVE_LIB_MAGIC magic 0 
if [ 11 = "$HAVE_LIB_MAGIC$USE_MAGIC" ]; then

USE_LIB_MAGIC="1"
LIBMAGIC="-lmagic"
else
USE_LIB_MAGIC="0"
LIBMAGIC="-lr_magic"; fi
[ -z "${PKGCONFIG}" ] && PKGCONFIG=pkg-config
echo 'Using PKGCONFIG: '${PKGCONFIG}
printf 'checking pkg-config flags for capstone... '
tmp=`${PKGCONFIG} --cflags capstone 2>/dev/null`
if [ $? != 0 ]; then echo no ; HAVE_PKGCFG_CAPSTONE=0; 
else 
CAPSTONE_CFLAGS=$tmp; 
tmp=`${PKGCONFIG} --libs capstone 2>/dev/null`
if [ $? = 0 ]; then 
echo yes; HAVE_PKGCFG_CAPSTONE=1; 
CAPSTONE_LDFLAGS=$tmp; fi; fi
if [ 11 = "$WITH_CAPSTONE$HAVE_PKGCFG_CAPSTONE" ]; then

USE_CAPSTONE="1"
else
USE_CAPSTONE="0"; fi
check_library HAVE_LIB_Z z 0 
check_library HAVE_LIB_ZIP zip 0 
if [ 11 = "$HAVE_LIB_Z$USE_ZIP" ]; then

if [ "$HAVE_LIB_ZIP" = "1" ]; then
USE_LIB_ZIP="1"
LIBZIP="-lz -lzip"
else
USE_LIB_ZIP="0"
LIBZIP="-lrz"; fi
else
USE_LIB_ZIP="0"
LIBZIP="-lrz"; fi
HAVE_LIB_GMP="0"
check_library HAVE_LIB_SSL ssl 0 
[ -z "${PKGCONFIG}" ] && PKGCONFIG=pkg-config
echo 'Using PKGCONFIG: '${PKGCONFIG}
printf 'checking pkg-config flags for openssl... '
tmp=`${PKGCONFIG} --cflags openssl 2>/dev/null`
if [ $? != 0 ]; then echo no ; HAVE_PKGCFG_OPENSSL=0; 
else 
SSL_CFLAGS=$tmp; 
tmp=`${PKGCONFIG} --libs openssl 2>/dev/null`
if [ $? = 0 ]; then 
echo yes; HAVE_PKGCFG_OPENSSL=1; 
SSL_LDFLAGS=$tmp; fi; fi
if [ ! "$SSL_LDFLAGS" = "" ]; then
HAVE_OPENSSL="1"; fi
if [ 11 = "$WANT_OPENSSL$HAVE_OPENSSL" ]; then

HAVE_OPENSSL="1"
else
HAVE_OPENSSL="0"; fi
if [ "$SSL_LDFLAGS" = "" ]; then
if [ "$HAVE_LIB_SSL" = "0" ]; then
HAVE_OPENSSL="0"
else
SSL_LDFLAGS="-lssl"; fi; fi
if [ "$USEROSTYPE" = "auto" ]; then
if [ "$HOST_OS" = "mingw32_nt-6.2" ]; then
USEROSTYPE="mingw32"
else
if [ "$HOST_OS" = "mingw32_nt" ]; then
USEROSTYPE="mingw32"
else
if [ "$HOST_OS" = "linux" ]; then
USEROSTYPE="gnulinux"
else
if [ "$HOST_OS" = "gnu" ]; then
USEROSTYPE="gnulinux"
HAVE_LIB_DL="1"
DL_LIBS="-ldl"
else
if [ "$HOST_OS" = "sunos" ]; then
USEROSTYPE="solaris"
else
if [ "$HOST_OS" = "gnu/kfreebsd" ]; then
USEROSTYPE="bsd"
else
if [ "$HOST_OS" = "netbsd" ]; then
USEROSTYPE="bsd"
else
if [ "$HOST_OS" = "freebsd" ]; then
USEROSTYPE="bsd"
else
if [ "$HOST_OS" = "openbsd" ]; then
USEROSTYPE="bsd"
else
if [ "$HOST_OS" = "darwin" ]; then
USEROSTYPE="darwin"; fi; fi; fi; fi; fi; fi; fi; fi; fi; fi; fi
if [ "$LIBVERSION" = "xxx" ]; then
LIBVERSION="$VERSION"; fi
SEDFLAGS=" -e '"
COUNT=0
for A in ${ENVWORDS} ; do
	[ "${A}" = VPATH ] && continue
	[ "${A}" = srcdir ] && continue 
	eval "VAR=\$${A}"
	VAR="`echo ${VAR} | sed -e 's/\,/\\\,/g'`"
	[ $COUNT = 10 ] && COUNT=0 && SEDFLAGS="${SEDFLAGS}' -e '"
	COUNT=$(($COUNT+1))
	SEDFLAGS="${SEDFLAGS}s,@${A}@,${VAR},g;"
done
SEDFLAGS="${SEDFLAGS}'"
for A in ./config-user.mk libr/include/r_userconf.h pkgcfg/r_io.pc pkgcfg/r_magic.pc pkgcfg/r_asm.pc pkgcfg/r_bin.pc pkgcfg/r_anal.pc pkgcfg/r_hash.pc pkgcfg/r_cons.pc pkgcfg/r_core.pc pkgcfg/r_lang.pc pkgcfg/r_socket.pc pkgcfg/r_debug.pc pkgcfg/r_reg.pc pkgcfg/r_config.pc pkgcfg/r_flag.pc pkgcfg/r_syscall.pc pkgcfg/r_util.pc pkgcfg/r_search.pc pkgcfg/r_bp.pc pkgcfg/r_parse.pc pkgcfg/r_fs.pc  ; do # SUBDIRS
if [ -f "${VPATH}/${A}.acr" ]; then
  SD_TARGET=${A}
 else
  if [ -d "${VPATH}/${A}" ]; then
   SD_TARGET=${A}/Makefile
   mkdir -p ${A}
  else
   echo "ERROR: Cannot find ${VPATH}/${A}.acr" >&2
   exit 1
  fi
 fi
 echo "creating ${SD_TARGET}"
mkdir -p $(echo ${A} | sed -e "s,/`basename ${A}`$,,g")
 cat ${VPATH}/${SD_TARGET}.acr | \
eval sed -e "s,@VPATH@,${VPATH}/${A},g" ${SEDFLAGS} > ${SD_TARGET}.tmp

for A in ${ENVWORDS}; do
VALUE=`eval echo "$"${A}`
if [ "$VALUE" = 0 ]; then ## FALSE
 MARK="##${A}##"
if [ -n "`grep \"${MARK}\" ${SD_TARGET}.tmp`" ]; then
 mv ${SD_TARGET}.tmp ${SD_TARGET}.tmp2
 cat ${SD_TARGET}.tmp2 | MARK=$MARK awk 'BEGIN{a=0;}{if($1==ENVIRON["MARK"]){if(a)a=0;else a=1}else{if(!a)print;}}' > ${SD_TARGET}.tmp
 fi
fi
done
 mv ${SD_TARGET}.tmp ${SD_TARGET} && rm -f ${SD_TARGET}.tmp2
 if [ ! $? = 0 ]; then echo Cannot write target file ; control_c ; fi
done

do_remove
echo
echo "Final report:"
for A in  PREFIX HAVE_LIB_GMP HAVE_OPENSSL USE_CAPSTONE HAVE_FORK HAVE_JEMALLOC VERSION USE_LIB_ZIP USE_LIB_MAGIC DEBUGGER CC USERCC USEROSTYPE LIBVERSION BUILD HOST TARGET ; do # REPORT
eval VAL="\$${A}"
[ -z "${VAL}" ] && VAL="(null)"
echo " - ${A} = ${VAL}"
done