# brace environment

# some useful env variables you can set to 1:
#  BX_DEBUG
#  DEBUG
#  BRACE_STANDALONE
#  BR_FIX
#  BRACE_LINE_NUMBERS
#  BR_CLEAN
#  BRACE_PLAIN
#  OPTIMIZE    (set to desired -O level)

export CFLAGS LDFLAGS LDLIBS LDLIBS_PLAIN CC BRACE_LANGUAGE BRACE_LIB BRACE_USE

MINGW=
EXE=
if [ -n "$WINDIR" -o -n "$windir" ]; then
	MINGW=1
	EXE=.exe
fi

USER_CFLAGS="$CFLAGS" ; CFLAGS=""
USER_LDFLAGS="$LDFLAGS" ; LDFLAGS=""
USER_LDLIBS="$LDLIBS" ; LDLIBS=""

CFLAGS="$CFLAGS -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT"  # WTF needs --shared??
CFLAGS="$CFLAGS -I/usr/local/include -I/usr/include/SDL"
LDLIBS="$LDLIBS -L/usr/local/lib"

# msys 'which' is a shell script which for some reason won't run from here :/
# this should be a bit faster anyway
which() {
	# this unfortunately depends on the shell
	A=`type "$@" 2>/dev/null || true`
	B="${A%: not found}"
	if [ "$A" != "$B" ]; then
		A=""
	fi
	if [ -n "$A" ]; then
		A="/${A#*/}"
		echo "$A"
	else
		return 1
	fi
}

BRACE_DIR=`which brace$EXE`
BRACE_DIR=`dirname "$BRACE_DIR"`
BRACE_DIR=`dirname "$BRACE_DIR"`
if [ -z "$BRACE_SO" ]; then
	BRACE_SO="$BRACE_DIR/lib"
fi
if [ -z "$BRACE_LIB" ]; then
	BRACE_LIB="$BRACE_DIR/include"
	if [ \! -d "$BRACE_LIB" ]; then
		BRACE_LIB="$BRACE_SO"
	fi
fi
if [ -z "$BRACE_STANDALONE" -a -z "$LIBB_BUILD" ]; then
	LB="-lb"
	if [ -n "$BRACE_PLAIN" ]; then
		LB="${LB}_plain"
	fi
	if [ -n "$BRACE_DEBUG" ]; then
		LB="${LB}_debug"
	fi
	LDLIBS="$LDLIBS $LB"
	BRACE_L_SO="-L\"$BRACE_SO\""
else
	BRACE_L_SO=
fi

if [ -z "$BRACE_USE" ]; then
	LDLIBS="$LDLIBS -lm"
	LDLIBS_FANCY="$LDLIBS_FANCY -lpng -lSDL -lSDL_mixer"
	if [ -n "$MINGW" ]; then
		BRACE_USE="cz- mingw gnu- bsd- linux- modern- pc"
		BRACE_USE="$BRACE_USE io-select"
		LDFLAGS="$LDFLAGS -Wl,--enable-auto-import,--enable-runtime-pseudo-reloc"
		LDLIBS="$LDLIBS -lws2_32"
		LDLIBS_FANCY="$LDLIBS_FANCY -lopengl32 -lglu32 -lgdi32"
	else
#		LDLIBS_FANCY="$LDLIBS_FANCY -lz -lxcb -ldl -lXau -lXdmcp"
#		  # XXX This is nonsense, shouldn't be needed, something wrong with my eee pc!
		BRACE_USE="cz- unix mingw-"
		if [ -e /usr/include/X11/Xlib.h -o -e /usr/X11R6/include/X11/Xlib.h -o -e /usr/pkg/include/X11/Xlib.h -o -e /usr/local/include/X11/Xlib.h ]; then
			BRACE_USE="$BRACE_USE x"
			LDLIBS_FANCY="$LDLIBS_FANCY -L/usr/X11R6/lib -lX11 -lXext"
			CFLAGS="$CFLAGS -I/usr/X11R6/include"
		else
			BRACE_USE="$BRACE_USE gr_dummy"  # XXX this is bogus
		fi
		LDLIBS="$LDLIBS -lcrypt"
		UNAME=`uname | tr 'A-Z' 'a-z'`
		case "$UNAME" in
		*bsd*|sunos|dragonfly|darwin)
			BRACE_USE="$BRACE_USE bsd"
			case "$UNAME" in
			*netbsd*|*openbsd*)
				BRACE_USE="$BRACE_USE modern-" ;;
			# modern is about sendfile and tcp cork
			# not sure about openbsd ? probably doesn't have them
			*)
				BRACE_USE="$BRACE_USE modern" ;;
			esac ;;
		*)
			BRACE_USE="$BRACE_USE bsd-" ;;
		esac
		BRACE_USE="$BRACE_USE $UNAME"
#		echo "$UNAME"
		if [ "$UNAME" = "linux" ]; then
			V=`uname -r`
			V="${V%%-*}"
			A=`uname -m`
			case "$A" in
			arm*) ARM=1;;
			*) ARM=0;;
			esac
			while [ "${V#*.*.*.}" != "$V" ]; do
				V="${V%.*}"
			done
			major="${V%.*}"
			minor="${V##*.}"
#			echo "$major $minor"
			if [ "$major" = 2.6 -a "$minor" -ge 20 ]; then
				# XXX allegedly this is included in 2.6.19,
				# but it's not in knoppix, perhaps glibc was old
				# not sure exactly when "modern"
				# (sendfile / cork) entered Linux
				BRACE_USE="$BRACE_USE modern"
				BRACE_USE="$BRACE_USE io-select"
#				
#				!! epoll doesn't work on regular files ??
#				if [ "$ARM" = 0 ]; then
#					BRACE_USE="$BRACE_USE io-epoll"
#				else
#					BRACE_USE="$BRACE_USE io-select"
#				fi
			else
				BRACE_USE="$BRACE_USE modern- io-select"
			fi
		else
			BRACE_USE="$BRACE_USE linux- io-select"
		fi
		if [ "$UNAME" != "linux" -a "$UNAME" != "hurd" -a "$UNAME" != "gnu" ]; then
			BRACE_USE="$BRACE_USE gnu-"
		fi

		# devices: TODO N900, etc.
		if [ -e '/proc/pandora' ]; then
			DEVICE=pandora
			DEVICE_EXTRA=gles
			LDLIBS_FANCY="$LDLIBS_FANCY -lEGL -lGLES_CM -lpvrPVR2D_X11WSEGL"
		else
			DEVICE="pc"
			DEVICE_EXTRA=
			LDLIBS_FANCY="$LDLIBS_FANCY -lGL"
		fi
		BRACE_USE="$BRACE_USE $DEVICE $DEVICE_EXTRA"

	fi
	BU=""
	for A in $BRACE_USE; do
		[ -e "$BRACE_LIB/$A" ] && BU="$BU $A"
	done
	BRACE_USE="${BU# }"
fi

if [ -z "$BRACE_LANGUAGE" ]; then BRACE_LANGUAGE=C; fi

if [ "$BRACE_LANGUAGE" = C++ ]; then
	c=cc
	if [ -z "$CXX" ]; then
		for CC in g++ c++ gcc tcc cc; do
			if [ -n "`which $CC$EXE`" ]; then
				break
			fi
		done
		if [ "$CC" = g++ ]; then
			CC="g++ -std=gnu++0x"
		fi
	else
		CC="$CXX"
	fi
	USER_CFLAGS="$USER_CFLAGS $CXXFLAGS"
	CFLAGS="$CFLAGS -Weffc++"
	LDLIBS="$LDLIBS -lstdc++"
else
	c=c
	if [ -z "$CC" ]; then
		for CC in gcc tcc cc; do
			if [ -n "`which $CC$EXE`" ]; then
				break
			fi
		done
		if [ "$CC" = gcc ]; then
			CC="$CC -pedantic -std=gnu99"
		fi
	fi
fi

LDLIBS="$BRACE_L_SO $LDLIBS"
LDLIBS_PLAIN="$LDLIBS"
LDLIBS="$LDLIBS_PLAIN $LDLIBS_FANCY"
CFLAGS="-Wall -Wextra -Wno-long-long $CFLAGS"  # -I. -Werror
CINCLUDE="-I\"$BRACE_LIB\""
if [ -n "$DEBUG" ]; then
	CFLAGS="$CFLAGS -ggdb"
#	CFLAGS="$CFLAGS -g"
else
	LDFLAGS="$LDFLAGS -s"
fi
if [ "$OPTIMIZE" != "0" ] && [ -z "$DEBUG" -o -n "$OPTIMIZE" ]; then
	if [ -z "$OPTIMIZE" ]; then OPTIMIZE=2; fi
	CFLAGS="$CFLAGS -O$OPTIMIZE"
fi
if [ -n "$PROFILE" ]; then
	CFLAGS="$CFLAGS -pg"
	LDFLAGS="$LDFLAGS -pg"
fi
CFLAGS="${CFLAGS## }"
LDFLAGS="${LDFLAGS## }"
LDLIBS="${LDLIBS## }"
LDLIBS_PLAIN="${LDLIBS_PLAIN## }"
if [ -n "$BRACE_PLAIN" ]; then
	LDLIBS="$LDLIBS_PLAIN"
fi
CFLAGS="$CFLAGS $USER_CFLAGS"
LDFLAGS="$LDFLAGS $USER_LDFLAGS"
LDLIBS="$LDLIBS $USER_LDLIBS"