#! /bin/sh

# defaults
cc=cc
cross_prefix=
shared=

prefix=/usr/local
exec_prefix='${prefix}'
bindir='${exec_prefix}/bin'
libdir='${exec_prefix}/lib'
includedir='${prefix}/include'

for opt in "$@"; do

  optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`

  case "$opt" in
  --cross-prefix=*) cross_prefix="$optarg" ;;
  --enable-shared) shared=yes ;;
  --disable-shared) shared=no ;;

  --prefix=*) prefix="$optarg" ;;
  --exec-prefix=*) exec_prefix="$optarg" ;;
  --libdir=*) libdir="$optarg" ;;
  --includedir=*) includedir="$optarg" ;;
  --libexecdir=*|\
  --mandir=*|\
  --datadir=*|\
  --docdir=*|\
  --sysconfdir=*|\
  --localstatedir=*|\
  --sbindir=*|\
  --sharedstatedir=*|\
  --oldincludedir=*|\
  --datarootdir=*|\
  --infodir=*|\
  --localedir=*|\
  --htmldir=*|\
  --dvidir=*|\
  --pdfdir=*|\
  --psdir=*)
    ;; # These autoconf switches are silently ignored
  --help)
    cat <<EOF
Usage: ./configure [options]
Options (defaults shown in brackets):
 --help			print this help and exit
 --cross-prefix=PFX	use PFX for compile tools
 --prefix=PFX		install data in PFX [$prefix]
 --exec-prefix=EPFX	install binaries in EPFX [$exec_prefix]
 --bindir=BINDIR	install binaries in BINDIR [$bindir]
 --libdir=LIBDIR	install libraries in LIBDIR [$libdir]
 --includedir=INCDIR	install includesin INCDIR [$includedir]
 --disable-shared, --enable-shared
			disable or enable shared library build
			(a working libtool is needed for shared)
Environment variables:
 CC, CFLAGS	the C compiler [$cc]
 LD, LDFLAGS	linker [\$CC]
 PKG_CONFIG	pkg-config
 LIBTOOL	libtool
 AR		ar (the archiver)
EOF
    exit 0;;

  *) echo "E: unknown option \`$opt'" >&2; exit 1 ;;
  esac

done

# Preferred compiler
if [ -z "${CC}${cross_prefix}" ]; then
  CC="$cc"
else
  : ${CC:-${cross_prefix}gcc}
fi
: ${LD:='${CC}'}
: ${LIBTOOL:=${cross_prefix}libtool}
: ${PKG_CONFIG:=${cross_prefix}pkg-config}

cleanup() {
  rm -f conftest.* libconftest.la
}
cleanup
rm -f config.log
exec 3>config.log

error() {
  echo "E: $*" >&2
  echo "E: $*" >&3
  cleanup
  exit 1
}
warning() {
  echo "W: $*" >&2
  echo "W: $*" >&3
}

has() {
  type "$1" >/dev/null 2>&1
}

pkg_config() {
  # Run pkg-config, capturing its output to the log
  echo "== running: $PKG_CONFIG $@" >&3
  $PKG_CONFIG "$@" >&3 2>&1
}

if ! has $PKG_CONFIG ; then
  error "pkg-config binary $PKG_CONFIG not found"
fi

glib=glib-2.0
min_glib_ver=2.22
if ! pkg_config --atleast-version=$min_glib_ver $glib ; then
  error "required glib-$min_glib_ver not found"
fi
GLIB_CFLAGS=`$PKG_CONFIG --cflags $glib`
GLIB_LIBS=`$PKG_CONFIG --libs $glib`

# check for smartcard support
if ! pkg_config --atleast-version=3.12.8 nss ; then
  error "NSS package not found"
fi
NSS_CFLAGS=`$PKG_CONFIG --cflags nss`
NSS_LIBS=`$PKG_CONFIG --libs nss`

do_libtool() {
  tmp=$1; shift
  # Run the compiler under libtool, capturing its output to the log.
  echo "$LIBTOOL $tmp --tag=CC $CC $@" >&3
  $LIBTOOL $tmp --tag=CC $CC "$@" >&3 2>&1
}

if [ "$shared" = no ]; then
  LIBTOOL=
else
  cat > conftest.c <<EOF
void *f(unsigned char *buf, int len);
void *g(unsigned char *buf, int len);
void *f(unsigned char *buf, int len) { return (void*)0L; }
void *g(unsigned char *buf, int len) { return f(buf, len); }
EOF
  if do_libtool --mode=compile $CFLAGS -c -fPIE -DPIE -o conftest.lo conftest.c && \
     do_libtool --mode=link $LDFLAGS -o libconftest.la conftest.lo
  then
    :
  elif [ "$shared" = yes ]; then
     error "libtool can not be used, can not build shared libraries"
  else
    warning "disabling shared library support, no working libtool found"
    LIBTOOL=
  fi
fi

cleanup

cat >Makefile.tmp - Makefile.in <<EOF || exit 1
# Makefile for libcacard
# @configure_output@

prefix = $prefix
exec_prefix = $exec_prefix
bindir = $bindir
libdir = $libdir
includedir = $includedir

CC = $CC
CFLAGS = $CFLAGS
LD = $LD
LDFLAGS = $LDFLAGS
LIBTOOL = $LIBTOOL
AR = ${AR:-${cross_prefix}ar}
RANLIB = ${RANLIB:-${cross_prefix}ranlib}

INSTALL = install
SED = sed

GLIB_CFLAGS = $GLIB_CFLAGS
GLIB_LIBS = $GLIB_LIBS
NSS_CFLAGS = $NSS_CFLAGS
NSS_LIBS = $NSS_LIBS

# end configuration section
EOF

mv Makefile.tmp Makefile