#!/bin/sh -e

#####################################################
# this configure-script searches for the needed includes
# and libraries.
#
# it is MUCH faster, smaller and does what I want. :-)
#
# If you have openssl installed in
# an unusual directory like /home/me/install/ssl
# just give it as argument to ./configure
# it then searches for headers in /home/me/install/ssl/include
# and librarys in /home/me/install/ssl/lib
#
# if you have a very unusual setup or you are cross-compiling
# you can edit "Local.mak" to fit your needs and to reflect your setup
#
# The Makefiles should support parallel builds.
#
#######################################################

DIRS=""
HOST=linux
cygcheck.exe -V >/dev/null 2>&1 && HOST=w32

for dir in $@; do
  DIRS="$DIRS `cd $dir; pwd`"
done

DIRS="$QTDIR $DIRS"
if test "$HOST" = "linux"; then
  DIRS="$DIRS /usr /usr/X11R6 /usr/local"
  STDINC="-I/usr/include"
  STDLIB="-L/usr/lib"
  prefix=${prefix:=/usr/local}
  CFLAGS=${CFLAGS:=-Wall -ggdb -O2}
fi
if test "$HOST" = "w32"; then
  LIBS="-lQtCore4 -lstdc++ -lqtmain -lws2_32 -lwsock32 -lgdi32"
  SUFFIX=.exe
  CFLAGS="-Wall -g -ggdb -mthreads -mno-cygwin"
  LDFLAGS="-Wl,-enable-stdcall-fixup -Wl,-enable-auto-import \
	-Wl,-enable-runtime-pseudo-reloc"
fi

CC=${CC:=gcc}
CF="-I. -I.. -I\$(TOPDIR)/ui"
LDIRS=
MOC=moc
UIC=uic
LRELEASE=lrelease

err() {
  echo
  echo ERROR: $1
  echo
  err_occ=Y
}

#adds an includedir to $CF
add_include() {
  for _dir in $STDINC ${CF}; do
    if test "-I$1" = "${_dir}"; then
      return 0
    fi
  done

  CF="${CF} -I$1"
}

add_lib() {
  if test "$3" = "a"; then
    SLIBS="$SLIBS -l$2"
  else
    LIBS="$LIBS -l$2"
  fi
  for _libs in -L/usr/lib ${LDIRS}; do
    if test "-L$1" = "${_libs}"; then
      return 0
    fi
  done

  LDIRS="${LDIRS} -L$1"
}

# check for includes
search_includes() {
  for dir in ${DIRS};  do
    for dbn in "" ${subdirs}; do
      for include in outinc include; do
        if test -r "${dir}/${include}${dbn}/$1"; then
          add_include ${dir}/${include}${dbn}
	  test -z "${dbn}" || add_include ${dir}/${include}
          echo "Found: $1 at ${dir}/${include}${dbn}"
          return 0
        fi
      done
    done
  done
  return 1
}

# check for libs
search_lib() {
  for dir in ${DIRS};  do
    for dbn in $@; do
      for suffix in so dylib obj a; do
        for lib in lib out; do
          if test -r "${dir}/${lib}/lib${dbn}.${suffix}"; then
            add_lib "${dir}/${lib}" "${dbn}" "${suffix}"
	    echo "Found: lib${dbn}.${suffix} at ${dir}/${lib}"
            return 0
	  fi
	done
      done
    done
  done
  return 1
}

echo -e "\n\nConfiguring XCA `cat VERSION`\n----------------------------"

######################### QT
subdirs="/qt /qt4"
search_includes Qt/qobject.h || err "The QT Library headerfiles were not found. Set QTDIR appropriately."
subdirs="/qt/Qt /qt4/Qt"
search_includes qobject.h || err "The QT Library headerfiles were not found. Set QTDIR appropriately."
search_lib QtGui4 QtGui || err "The QT library was not found."
search_lib c_r || true

###################### OpenSSL
subdirs=""
search_includes openssl/opensslv.h || err "The OpenSSL library headerfiles were not found."
search_lib crypto || err "The OpenSSL library was not found."

export LD_LIBRARY_PATH
##### Try to compile them all together and show the versions.
cat >conftest.c <<EOF
#include <stdio.h>
#include <openssl/opensslv.h>
#include <Qt/qglobal.h>

int main(){
  printf("\nThe Versions of the used libraries are:\n\t%s\n\tQT: %s\n",
	 OPENSSL_VERSION_TEXT, QT_VERSION_STR );
  if (QT_VERSION < 0x040001) {
	printf("You need Qt 4 or higher\n");
	return 1;
  }
  return 0;
}
EOF

echo "${CC} $LIBS $LDIRS $CF $CFLAGS conftest.c -o conftest${SUFFIX}" >conftest.log
if ${CC} $LIBS $LDIRS $CF $CFLAGS conftest.c -o conftest${SUFFIX} >> conftest.log 2>&1; then
  ./conftest${SUFFIX} || err "Unable to execute a freshly compiled application, maybe you have to adjust your LD_LIBRARY_PATH or /etc/ld.so.conf" && rm -f conftest.c conftest conftest.log
else
  err "Unable to compile a minimal application look at 'conftest.log' for errors"
fi

findapp() {
  for app in `which $@ 2>/dev/null`; do
    if test -x "$app"; then
      echo "$app"
      break
    fi
  done
}

if test "$HOST" = "w32"; then
  LIBS="-lQtGui4 -lQtCore4 -lqtmain -lstdc++ -lws2_32 -lcrypto -lwsock32 -lgdi32"
  SLIBS=""
fi

MOC=`findapp $QTDIR/bin/moc moc4 moc-qt4 moc`
UIC=`findapp $QTDIR/bin/uic uic4 uic-qt4 uic`
RCC=`findapp $QTDIR/bin/rcc rcc4 rcc-qt4 rcc`
LRELEASE=`findapp $QTDIR/bin/lrelease lrelease4 lrelease-qt4 lrelease`


cat >Local.mak <<EOF
CPPFLAGS=$CF
CFLAGS=${CFLAGS}

LDFLAGS=$LDFLAGS $LDIRS

# List of all libs to be compiled statically
SLIBS=$SLIBS

# list of dynamic libraries
LIBS=$LIBS

MOC=$MOC
UIC=$UIC
RCC=$RCC
LRELEASE=$LRELEASE

CC=${CC}
LD=${LD:=ld}
STRIP=${STRIP:=strip}
WINDRES=${WINDRES:=windres}
MAKENSIS=${MAKENSIS:=makensis.exe}
LINUXDOC=${LINUXDOC:=linuxdoc}

SUFFIX=${SUFFIX}
HOST=${HOST}
prefix=${prefix}

EOF
test -z "$etc" && etc=/etc/xca

cat >local.h <<EOF
#define PREFIX "$prefix"
#define ETC "$etc"
#define VER "`cat VERSION`"
EOF

find_make() {
  for dirs in /usr/local/bin /sw/bin /bin /usr/bin; do
    for make in gmake make; do
      if "${dirs}/${make}" -v 2>/dev/null | grep GNU; then
	mak="${dirs}/${make}"
	return
      fi
    done
  done
}

find_make

echo
if test ! -z "${mak}"; then
  echo "A usable 'make' executable was found in ${mak}"
else
  echo "No usable 'make' executable found."
fi
echo

if test "x${err_occ}" = "xY"; then
  echo
  echo "An error occured. Please edit 'Local.mak' manually if compiling fails."
fi