src/.make/buildc.mk

   1 ##################################################
   2 #Desc:   C Compiler Setup
   3 #Author: Mihrtec LLC
   4 #Date:   2016
   5 ##################################################
   6 #Included from ./build.mk
   7 #Defines variables used in the make process to
   8 #compile C files either to native bc through gcc,
   9 #or web through emscripten
  10 ##################################################
  11 #Manually defined resources
  12 ##################################################
  13 #Libraries to link for the build
  14 CLIBS    := wolfssl SDL2 SDL2_image SDL2_ttf
  15 #Modules for C (directories in src/ with C code)
  16 CMODULES := $(APPMODULE)
  17 #CFlag defaults
  18 CFLAGS   := -Wall
  19
  20
  21 ##################################################
  22 #Allow compiler-specific and OS-specific
  23 #makefiles to override C environment vars
  24 ##################################################
  25 -include .make/buildc_$(strip $(notdir $(CC))).mk
  26 ifdef OS
  27 -include .make/buildc_$(strip $(OS)).mk
  28 endif
  29
  30 #Link each CLIB with -l
  31 CFLAGS += $(patsubst %,-l%,$(CLIBS))
  32 #Include each module's root directory and .
  33 CFLAGS += $(patsubst %,-I%, $(CMODULES)) -I.
  34 #C Preprocessor defines
  35 CFLAGS += -DAPPNAME=$(APPNAME)
  36
  37 ##################################################
  38 #Conditional (may be set in buildc_*.mk files)
  39 ##################################################
  40 #Sources are found in any CMODULE subdir
  41 CSRC     ?= $(wildcard $(patsubst %,%/*.c,$(CMODULES)))
  42 #Output format suffix
  43 COBJSUF  ?= .o
  44 #Architecture
  45 CARCH    ?= $(shell uname -m)
  46 #Application suffix
  47 APPSUF   ?= .$(CARCH)
  48 #C binary distribution directory
  49 CDISTDIR ?= $(DISTDIR)
  50 #Directory for C binary/executable output files
  51 CBINDIR  ?= $(CDISTDIR)/bin
  52 #Set up the final C build targets
  53 CTARG    ?= $(CSRC:.c=$(COBJSUF))
  54
  55 #Set of shell functions used to determine dependencies
  56 #for building each c source file
  57 #$BASE is a keyword replaced in the main Makefile iteratively
  58 #for each source file.
  59 CDPIPE ?= $(strip $(CC)) -MM -MG $(CXXFLAXS) $(CFLAGS) $BASE.c
  60 CDSED  ?= sed -e 's@^.*\.o:@@'
  61 CDTR   ?= tr '\\' ' '
  62 #The shell command to execute and evaluate for deps
  63 CDEPSCOMMAND ?= $(CDPIPE) | $(CDSED) | $(CDTR)
  64
  65 #Set of shell functions used to determine the
  66 #name of each library the compiler/LD can't find
  67 LDPIPE ?= $(CC) $(patsubst %,-l%,$(CLIBS)) 2>&1 >/dev/null
  68 LDGREP ?= grep "cannot find"
  69 LDSED  ?= sed -e 's@^.*cannot find -l\([a-zA-Z0-9\.]*\).*@\1@g'
  70 #Calculate missing libs
  71 MISSINGLIBS ?= $(strip $(shell $(LDPIPE) | $(LDGREP) | $(LDSED)))
  72
  73 #Missing libraries will be downloaded
  74 #to MLSRCDIR and installed at MLLIBDIR
  75 MLDIR    := /usr/local
  76 MLSRCDIR := $(MLDIR)/src
  77 #If we aren't compiling for our own environment,
  78 #we need to create a directory for that type of
  79 #transpiled library
  80 ARCHLOCAL := $(shell uname -m | grep "$(CARCH)")
  81 MLLIBDIR  := $(if $(ARCHLOCAL),$(MLDIR)/lib,$(MLDIR)/lib$(CARCH))
  82
  83 CFLAGS += -L$(MLLIBDIR)
  84 CFLAGS += $(patsubst %,-I$(MLSRCDIR)/%,$(CLIBS))
  85
  86 #Include handler for building missing libs, if any
  87 ifdef MISSINGLIBS
  88 include .make/buildclibs.mk
  89 endif
  90