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# Desc:   Environment initialization for webcc
# Author: ksg
# Date:   2016
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# This file reads default Make vars and environment vars to produce a standard
# set of variables to compile with
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# Source languages handled by this build system.  These languages are capable of
# being compiled to an intermediary format for binary output by one of the
# provided compilers for each language
LANGS       := c cpp go
# Language-specific compilers and flags passed in from environment
c_C         := $(strip $(notdir $(CC)))
c_FLAGS     := $(strip $(CFLAGS)) -I$(SRC_DIR)
c_SRCL      := y
cpp_C       := $(strip $(notdir $(CXX)))
cpp_FLAGS   := $(strip $(CXXFLAGS)) $(c_FLAGS)
go_C        := gccgo
go_FLAGS    := $(c_FLAGS)
# Source-to-source languages handled by this build system
SLANGS      := y rl
# Yacc
y_C         := bison
y_FLAGS     := -d
y_TRG       := c h
y_STEM      := tab
# Ragel
rl_C        := ragel
rl_FLAGS    := -C
rl_TRG      := c
rl_STEM     := fsm
# Compiler-specific associations.  Each compiler has a binary object suffix
# (OBJ), an archiver (AR), and an archiver object suffix (AROBJ).  Each compiler
# may optionally have defined a linker (LD), and a binary output suffix (OUT).
cc_OBJ      := o
cc_LD       := $(LD)
cc_AR       := $(AR)
cc_AROBJ    := a
cc_DBG      := gdb
$(cpp_C)_LD := $(cc_LD)
gcc_OBJ     := $(cc_OBJ)
gcc_LD      := $(cc_LD)
ngcc_AR     := $(cc_AR)
gcc_AROBJ   := $(cc_AROBJ)
gcc_DBG     := $(cc_DBG)
emcc_OBJ    := bc
emcc_AR     := emar
emcc_AROBJ  := $(emcc_OBJ) #emar is just a python script that reparses shit for emcc
emcc_OUT    := .js
g++_OBJ     := $(cc_OBJ)
em++_OBJ    := $(emcc_OBJ)
em++_AR     := $(emcc_AR)
em++_AROBJ  := $(emcc_AROBJ)
em++_OUT    := $(emcc_OUT)
gccgo_OBJ   := o
gccgo_LD    := $(cc_LD)
gccgo_AR    := $(cc_AR)
gccgo_AROBJ := $(cc_AROBJ)
# Shell functions to determine what libraries can be linked by the compiler
cc_LDLIBS   := $(shell ldconfig -p | sed -e 's@\-*[0-9\.]*\.so.*$$@@g' -e 's@\tlib@@g' -e '/[\t ]/d')
gcc_LDLIBS  := $(cc_LDLIBS)
emcc_LDLIBS := 
g++_LDLIBS  := $(cc_LDLIBS)
em++_LDLIBS := 
go_LDLIBS   := $(cc_LDLIBS)
# location to build cross-compilation libraries in, not intended to be installed
# in the host system
LIB_DIR     := $(ROOT_DIR)/lib$(shell uname -m)/$($(c_C)_OBJ)
LIBDL_DIR   := $(LIB_DIR)/.cache
LIBINC_DIR  := $(ROOT_DIR)/include
# The makefile MUST be capable of generating these directories and all of their
# contents.  These directories are removed during the 'scrub' rule
MAKE_DIRS   := $(LIB_DIR) $(LIBDL_DIR)
# Set up lib inclusions, and scan for built libs
c_FLAGS     += -I$(LIBINC_DIR)
c_OBJ       := $($(c_C)_OBJ)
# Modules are any directories other than 'DRIVER_MODULE' in 'SRC_DIR' and
# produce a single archive in 'SRC_DIR' containing all of the module's symbols
MODULES     := $(patsubst $(SRC_DIR)/%/,%,$(filter-out $(DRIVER_DIR)/%,$(shell ls -d $(SRC_DIR)/*/)))