I am currently failing to write a good makefile and don't know the reason why.. -.-
This is my main.c:
#include <windows.h>
#include <stdio.h>
int main(int argc, char *argv[])
{
printf("MEEEEEP");
return (0);
}
This is my makefile:
# make SYSTEM= OS= ENVIRONMENT=
# Binaries to use
ifeq ($(ENVIRONMENT),MINGW)
CXX = i686-pc-mingw32-g++
else
CXX = g++
endif
REMOVE = rm -vf
RC = windres
EXE = .exe
#############################################################
# Info
ifeq ($(CXX),g++)
INFO_CXX = g++ -dumpversion; g++ -dumpmachine
endif
#############################################################
# Flags
DEBUG = -DDEBUG -g
OPTIMIZATION = -O2 #-Winline -finline-functions
CFLAGS = -Wall -Wextra -W -static $(DEBUG) $(OPTIMIZATION) -D$(SYSTEM) -D$(OS) -D$(ENVIRONMENT) $(PRGFLAGS)
ifeq ($(SYSTEM),I686)
CFLAGS += -m32
ifeq ($(OS),WIN32)
CFLAGS += -D_WIN32
endif
ifeq ($(ENVIRONMENT),MINGW)
CFLAGS += -fexceptions
endif
endif
LFLAGS =
#############################################################
# Files
CFILES = main.c
OBJS = ${CFILES:.c=.o}
#############################################################
# Include
INCLUDES = -I.
#############################################################
# Library
LIBRARIES =
#############################################################
# Targets
.PHONY: all
all:
@echo == Standard build: make SYSTEM=I686 OS=WIN32 ENVIRONMENT=MINGW
@echo
@echo
make SYSTEM=I686 OS=WIN32 ENVIRONMENT=MINGW gyro
#############################################################
# Implicit rules and filename extensions...
.SUFFIXES: .h .o .c
.c.o: %.h
@echo Compiling $< for $(SYSTEM) $(OS) $(ENVIRONMENT) ...
@echo MEEP
$(CXX) $(CFLAGS) $(INCLUDES) -c $< -o $@
@echo MEEP2
#############################################################
# Target rules
gyro: $(OBJS)
@echo Building software for $(SYSTEM) ...
@echo
$(CXX) $(CFLAGS) $(LFLAGS) -o $@$(EXE) $(OBJS) $(LIBRARIES)
#############################################################
# Clean
.PHONY: clean
clean:
$(REMOVE) $(OBJS)
#############################################################
# Info
.PHONY: info
info:
@echo
@echo Information about C++ Compiler/Linker:
@echo
$(INFO_CXX)
When i type in make gyro, i receive the output:
Compiling main.c for Windows_NT ...
MEEP
g++ -Wall -Wextra -W -static -DDEBUG -g -O2 -D -DWindows_NT -D -I. -c main.c -o main.o
makeNew.mak:83: recipe for target `main.o' failed
make: *** [main.o] Error 1
But Line number 83 is behind .c.o: %.h. And i don’t understand why. Does anyone have a solution for me?
You see the two empty -D entries in the g++ command line? They're causing the problem. You must have values in the -D items e.g. -DWIN32
if you're insistent on using something like -D$(SYSTEM) -D$(ENVIRONMENT) then you can use something like:
SYSTEM ?= generic
ENVIRONMENT ?= generic
in the makefile which gives them default values.
Your output looks to be missing the all important output:
<command-line>:0:1: error: macro names must be identifiers
<command-line>:0:1: error: macro names must be identifiers
just to clarify, what actually got sent to g++ was -D -DWindows_NT, i.e. define a preprocessor macro called -DWindows_NT; which is of course not a valid identifier (similarly for -D -I.)
Source: Stackoverflow.com