#!/bin/sh
# vi: set sw=4 ts=4:
#set -x

echo ""
echo "Checking build system dependencies:"
export LC_ALL=C

#############################################################
#
# check build system 'environment'
#
#############################################################
if test -n "$BUILDROOT_DL_DIR" ; then
	/bin/echo -e "Overriding \$(DL_DIR) in '.config'.		Ok"
	/bin/echo -e "External download directory:			Ok ($BUILDROOT_DL_DIR)"
else
	echo "BUILDROOT_DL_DIR clean:				Ok"
fi

if test -n "$CC" ; then
	echo "CC clean:						FALSE"
	/bin/echo -e "\n\nYou must run 'unset CC' so buildroot can run with";
	/bin/echo -e "a clean environment on your build machine\n";
	exit 1;
fi;
echo "CC clean:					Ok"

if test -n "$CXX" ; then
	echo "CXX clean:					FALSE"
	/bin/echo -e "\n\nYou must run 'unset CXX' so buildroot can run with";
	/bin/echo -e "a clean environment on your build machine\n";
	exit 1;
fi;
echo "CXX clean:					Ok"


if test -n "$CPP" ; then
	echo "CPP clean:					FALSE"
	/bin/echo -e "\n\nYou must run 'unset CPP' so buildroot can run with";
	/bin/echo -e "a clean environment on your build machine\n";
	exit 1;
fi;
echo "CPP clean:					Ok"


if test -n "$CFLAGS" ; then
	echo "CFLAGS clean:					FALSE"
	/bin/echo -e "\n\nYou must run 'unset CFLAGS' so buildroot can run with";
	/bin/echo -e "a clean environment on your build machine\n";
	exit 1;
fi;
echo "CFLAGS clean:					Ok"

if test -n "$INCLUDES" ; then
	echo "INCLUDES clean:					FALSE"
	/bin/echo -e "WARNING: INCLUDES contains:\n\t'$INCLUDES'"
else
	echo "INCLUDES clean:					Ok"
fi

if test -n "$CXXFLAGS" ; then
	echo "CXXFLAGS clean:					FALSE"
	/bin/echo -e "\n\nYou must run 'unset CXXFLAGS' so buildroot can run with";
	/bin/echo -e "a clean environment on your build machine\n";
	exit 1;
fi;
echo "CXXFLAGS clean:					Ok"

if test -n "$GREP_OPTIONS" ; then
        echo "GREP_OPTIONS clean:                               FALSE"
        /bin/echo -e "\n\nYou must run 'unset GREP_OPTIONS' so buildroot can run with";
        /bin/echo -e "a clean environment on your build machine\n";
        exit 1;
fi;

if test -n "$CROSS_COMPILE" ; then
        echo "CROSS_COMPILE clean:                               FALSE"
        /bin/echo -e "\n\nYou must run 'unset CROSS_COMPILE' so buildroot can run with";
        /bin/echo -e "a clean environment on your build machine\n";
        exit 1;
fi;

if test -n "$ARCH" ; then
        echo "ARCH clean:                               FALSE"
        /bin/echo -e "\n\nYou must run 'unset ARCH' so buildroot can run with";
        /bin/echo -e "a clean environment on your build machine\n";
        exit 1;
fi;


echo "WORKS" | grep "WORKS" >/dev/null 2>&1
if test $? != 0 ; then
	echo "grep works:				FALSE"
	exit 1
fi

# sanity check for CWD in LD_LIBRARY_PATH
# try not to rely on egrep..
if test -n "$LD_LIBRARY_PATH" ; then
	/bin/echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | /bin/grep ':.:' >/dev/null 2>&1 ||
	/bin/echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | /bin/grep 'TRiGGER_start:' >/dev/null 2>&1 ||
	/bin/echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | /bin/grep ':TRiGGER_end' >/dev/null 2>&1 ||
	/bin/echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | /bin/grep '::' >/dev/null 2>&1
	if test $? = 0; then
		echo "LD_LIBRARY_PATH sane:				FALSE"
		echo "You seem to have the current working directory in your"
		echo "LD_LIBRARY_PATH environment variable. This doesn't work."
		exit 1;
	else
		echo "LD_LIBRARY_PATH sane:				Ok"
	fi
fi;


#############################################################
#
# check build system 'which'
#
#############################################################
if ! which which > /dev/null ; then
	echo "which installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'which' on your build machine\n";
	exit 1;
fi;
echo "which installed:				Ok"


#############################################################
#
# check build system 'sed'
#
#############################################################
SED=$(toolchain/dependencies/check-host-sed.sh)

if [ -z "$SED" ] ; then
	XSED=$HOST_SED_DIR/bin/sed
	echo "sed works:					No, using buildroot version instead"
else
	XSED=$SED
	echo "sed works:					Ok ($SED)"
fi


#############################################################
#
# check build system 'make'
#
#############################################################
MAKE=$(which make 2> /dev/null)
if [ -z "$MAKE" ] ; then
	echo "make installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'make' on your build machine\n";
	exit 1;
fi;
MAKE_VERSION=$($MAKE --version 2>&1 | $XSED -e 's/^.* \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q')
if [ -z "$MAKE_VERSION" ] ; then
	echo "make installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'make' on your build machine\n";
	exit 1;
fi;
MAKE_MAJOR=$(echo $MAKE_VERSION | $XSED -e "s/\..*//g")
MAKE_MINOR=$(echo $MAKE_VERSION | $XSED -e "s/^$MAKE_MAJOR\.//g" -e "s/\..*//g" -e "s/[a-zA-Z].*//g")
if [ $MAKE_MAJOR -lt 3 ] || [ $MAKE_MAJOR -eq 3 -a $MAKE_MINOR -lt 80 ] ; then
	echo "You have make '$MAKE_VERSION' installed.  GNU make >=3.80 is required"
	exit 1;
fi;
echo "GNU make version '$MAKE_VERSION':			Ok"


#############################################################
#
# check build system 'gcc'
#
#############################################################
COMPILER=$(which $HOSTCC 2> /dev/null)
if [ -z "$COMPILER" ] ; then
	COMPILER=$(which cc 2> /dev/null)
fi;
if [ -z "$COMPILER" ] ; then
	echo "C Compiler installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'gcc' on your build machine\n";
	exit 1;
fi;

COMPILER_VERSION=$($COMPILER -v 2>&1 | $XSED -n '/^gcc version/p' |
	$XSED -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q')
if [ -z "$COMPILER_VERSION" ] ; then
	echo "gcc installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'gcc' on your build machine\n";
	exit 1;
fi;
COMPILER_MAJOR=$(echo $COMPILER_VERSION | $XSED -e "s/\..*//g")
COMPILER_MINOR=$(echo $COMPILER_VERSION | $XSED -e "s/^$COMPILER_MAJOR\.//g" -e "s/\..*//g")
if [ $COMPILER_MAJOR -lt 3 -o $COMPILER_MAJOR -eq 2 -a $COMPILER_MINOR -lt 95 ] ; then
	echo "You have gcc '$COMPILER_VERSION' installed.  gcc >= 2.95 is required"
	exit 1;
fi;
echo "C compiler '$COMPILER'"
echo "C compiler version '$COMPILER_VERSION':			Ok"


# check for host CXX
CXXCOMPILER=$(which $HOSTCXX 2> /dev/null)
if [ -z "$CXXCOMPILER" ] ; then
	CXXCOMPILER=$(which c++ 2> /dev/null)
fi
if [ -z "$CXXCOMPILER" ] ; then
	echo "C++ Compiler installed:		    FALSE"
	/bin/echo -e "\nYou may have to install 'g++' on your build machine\n"
	#exit 1
fi
if [ ! -z "$CXXCOMPILER" ] ; then
	CXXCOMPILER_VERSION=$($CXXCOMPILER -v 2>&1 | $XSED -n '/^gcc version/p' |
		$XSED -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q')
	if [ -z "$CXXCOMPILER_VERSION" ] ; then
		echo "c++ installed:		    FALSE"
		/bin/echo -e "\nYou may have to install 'g++' on your build machine\n"
		#exit 1
	fi

	CXXCOMPILER_MAJOR=$(echo $CXXCOMPILER_VERSION | $XSED -e "s/\..*//g")
	CXXCOMPILER_MINOR=$(echo $CXXCOMPILER_VERSION | $XSED -e "s/^$CXXCOMPILER_MAJOR\.//g" -e "s/\..*//g")
	if [ $CXXCOMPILER_MAJOR -lt 3 -o $CXXCOMPILER_MAJOR -eq 2 -a $CXXCOMPILER_MINOR -lt 95 ] ; then
		echo "You have g++ '$CXXCOMPILER_VERSION' installed.  g++ >= 2.95 is required"
		exit 1
	fi
	echo "C++ compiler '$CXXCOMPILER'"
	echo "C++ compiler version '$CXXCOMPILER_VERSION':			Ok"
fi

#############################################################
#
# check build system 'awk'
#
#############################################################
if ! which awk > /dev/null ; then
	echo "awk installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'awk' on your build machine\n";
	exit 1;
fi;
echo "awk installed:					Ok"

#############################################################
#
# check build system 'bash'
#
#############################################################
if ! $SHELL --version 2>&1 | grep -q '^GNU bash'; then
	echo "bash installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'bash' on your build machine\n";
	exit 1;
fi;
echo "bash installed:					Ok"

#############################################################
#
# check build system 'bison'
#
#############################################################
if ! which bison > /dev/null ; then
	echo "bison installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'bison' on your build machine\n";
	exit 1;
fi;
echo "bison installed:				Ok"


#############################################################
#
# check build system 'flex'
#
#############################################################
if ! which flex > /dev/null ; then
	echo "flex installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'flex' on your build machine\n";
	exit 1;
fi;
echo "flex installed:					Ok"


#############################################################
#
# check build system 'gettext'
#
#############################################################
if ! which msgfmt > /dev/null ; then \
	echo "gettext installed:		    FALSE"
	/bin/echo -e "\n\nYou must install 'gettext' on your build machine\n"; \
	exit 1; \
fi;
echo "gettext installed:				Ok"


if ! which makeinfo > /dev/null ; then \
	echo "makeinfo installed:		    FALSE"
	/bin/echo -e "\n\nMost likely some packages will fail to build their documentation"
	echo "Either install 'makeinfo' on your host or fix the respective packages."
	echo "Makeinfo can usually be found in the texinfo package for your host."
else
	echo "makeinfo installed:				Ok"
fi


#############################################################
#
# All done
#
#############################################################
echo "Build system dependencies:			Ok"
echo ""