##################################################
#Desc:   C Compiler Setup
#Author: Mihrtec LLC
#Date:   2016
##################################################
#Included from ./build.mk
#Defines variables used in the make process to
#compile C files either to native bc through gcc,
#or web through emscripten
##################################################
#expand the app source dir last as a module to build
CMODULES := $(MODULES) $(APPSRC)
CLIBS    := $(patsubst %,-l%,$(LIBS))
CSRC     := $(wildcard $(patsubst %,%/*.c,$(CMODULES)))
CTARG    := $(CSRC:.c=.o)

##################################################
#Global CFlags
##################################################
#Warn Level
CFLAGS := -Wall
#Include each module's root directory and src/
CFLAGS += $(patsubst %,-I%, $(CMODULES)) -I.
#Precompiler Flags
CFLAGS += -DAPPNAME=$(APPNAME)

##################################################
#Missing Lib Handler
##################################################
LDPIPE := ld $(CLIBS) 2>&1 >/dev/null
LDGREP := grep "cannot find"
LDSED  := sed -e 's@ld:.*-l\([^ ]*\).*@\1@'
MISSINGLIBS := $(shell $(LDPIPE) | $(LDGREP) | $(LDSED))
#Automake vars for building libs
AMGEN  := ./autogen.sh
AMCONF := ./configure
AMMAKE := make

##################################################
#Override C Environment for compiler-specific
#or OS specific requirements, if present
##################################################
-include .make/buildc_$(strip $(notdir $(CC))).mk
ifdef OS
-include .make/buildc_$(strip $(OS)).mk
endif

#Determine suffix (possibly overridden by includes)
COBJSUF := $(suffix $(firstword $(CTARG)))

##################################################
#C Dependency Generator
##################################################
CGENDEP := $(strip $(CC) -MM -MG $(CXXFLAGS) $(CFLAGS)) $BASE.c
CGENDEP += | sed -e 's@^.*\.o:@@'
CGENDEP += | tr '\\' ' '

#Set up all missing libs to be made in the source directory
ifdef MISSINGLIBS
$(info Static libraries to be built in $(XTLIBDIR):)
$(info $(patsubst %,lib%.so,$(MISSINGLIBS)))
STATICLIBS := $(patsubst %,$(XTLIBDIR)/lib%.so,$(MISSINGLIBS))
CFLAGS     += -L$(XTLIBDIR) $(patsubst %,-I$(XTDIR)/%,$(MISSINGLIBS))
#Ensure that C files depend on the creation of these static libs
CDEPS      += $(STATICLIBS)
#Modify the dependency generator to find the right directory for
#missing libs (they are in XTDIR/libname)
CGENDEP    += $(patsubst %, | sed -e 's@ \(%\)/@$(XTDIR)/\1/\1/@',$(MISSINGLIBS))
endif

CFLAGS += $(CLIBS)