# cause the fancy $${@D} directory rules to work out
.SECONDEXPANSION:

B_DEBUG    := DEBUG
B_FINAL    := FINAL
B_WIN32    := WIN32

# set this on the command line to get a WIN32 or a FINAL build
G_BUILD    := ${B_DEBUG}

ifeq (${G_BUILD},${B_DEBUG})
else
ifeq (${G_BUILD},${B_FINAL})
else
ifeq (${G_BUILD},${B_WIN32})
else
    $(error 'G_BUILD = ${G_BUILD}' is invalid. Valid types are '${B_DEBUG}', '${B_FINAL}' or '${B_WIN32}')
endif
endif
endif


T_OPTFLAGS := -O2
T_DBGFLAGS := -ggdb
T_PRFFLAGS := ${T_DBGFLAGS} -pg
T_WARFLAGS := -Wall -Wextra -pedantic -ansi

G_CXXFLAGS := ${T_WARFLAGS}
ifeq (${G_BUILD},${B_DEBUG})
    G_CXXFLAGS    += ${T_DBGFLAGS}
else
ifeq (${G_BUILD},${B_FINAL})
    G_CXXFLAGS    += ${T_OPTFLAGS}
else
ifeq (${G_BUILD},${B_WIN32})
    G_CXXFLAGS    += ${T_OPTFLAGS}
else
    $(error 'G_BUILD = ${G_BUILD}' is invalid.)
endif
endif
endif

T_OPTFLAGS :=
T_DBGFLAGS :=
T_PRFFLAGS :=
T_WARFLAGS :=

G_LNKFLAGS :=

ifeq (${G_BUILD},${B_WIN32})
    G_CXX := mingw32-g++
else
    G_CXX := g++
endif

ifeq (${G_BUILD},${B_WIN32})
    G_LIBGL   := -lopengl32 -lglu32
    G_LIBSDL  := `/usr/mingw32/bin/sdl-config --libs`
else
    G_LIBGL   := -lGL -lGLU
    G_LIBSDL  := `sdl-config --libs`
endif

G_SRCSDIR := src/
G_DEPSDIR := deps/

ifeq (${G_BUILD},${B_DEBUG})
    G_OBJSDIR := objsd/
    G_BINDIR  := bind/
else
ifeq (${G_BUILD},${B_FINAL})
    G_OBJSDIR := objs/
    G_BINDIR  := bin/
else
ifeq (${G_BUILD},${B_WIN32})
    G_OBJSDIR := objs-mingw32/
    G_BINDIR  := bin-mingw32/
else
    $(error 'G_BUILD = ${G_BUILD}' is invalid.)
endif
endif
endif


ifeq (${G_BUILD},${B_WIN32})
    PRNTFMT := printf "%-12s: %s\n"
else
    PRNTFMT := printf "%-8s: %s\n"
endif

VERBOSE := 0

ifeq (${VERBOSE},0)
    # quiet the printf command
    Q1 := @
    # quiet the command that is `replaced' by an echo
    Q2 := @
else
    # EAT the printf command as if it was not there
    Q1 := @true # NOTE: the space between @true and the # is VERY important!!
    # do not quiet the command output
    Q2 :=
endif


ifeq (${G_BUILD},${B_WIN32})
    prefix      := /usr/mingw32
else
    prefix      := /usr
endif
exec_prefix := ${prefix}
includedir  := ${prefix}/include
libdir      := ${exec_prefix}/lib
INSTALL     := install