Why is the Makefile not generating the objects? - c

When I compilate the library (4 folders: 1 inc -> mylib.h, lib, obj, src -> mylib.c) with this makefile:
makefile:
CC = gcc
AR = ar
CFLAGS = -c -Wall
all: Release
Release: my
my: my.o
$(AR) rc lib/libmy.a obj/my.o
bash gen_pc.sh
obj/my.o: src/my.c
$(CC) $(CFLAGS) src/my.c -o obj/my.o
clean:
rm -f obj/my.o lib/libmy.a lib/libmy.pc
gen_pc:
current_path=`readlink -e .`
cat > lib/libmy.pc << EOM
prefix=$current_path
includedir=\${prefix}/inc
libdir=\${prefix}/lib
Name: my
Description: My library
Version: 1.0
Cflags: -I\${includedir}
Libs: -L\${libdir} -lmy
Libs.private: -lm
EOM
no .o files / objects are generated in lib folder even if when running make in terminal I don't receive any errors:
make
gcc -c -Wall src/my.c -o obj/my.o
ar rc lib/libmy.a obj/my.o
Any idea why this happens?

Related

Makefile - Compile object with different library

I´m trying to create a Makefile that build a lib and compile the file. My problem is that depending on the %.c file I need to compile with different lib.
The SRC_MLX need the $(LFLAGS) and the SRC don´t. So the gcc compiler don´t allow me to compile the SRC with the LFLAGS. That´s the reason I need to separate.
I´ve tried this way:
SRCS = $(DIR_SRC)/ft_utils.c \
$(DIR_SRC)/ft_adt.c \
$(DIR_SRC)/ft_circle.c \
$(DIR_SRC)/ft_line.c \
$(DIR_SRC)/ft_trgb.c \
$(DIR_SRC)/ft_quadrilateral.c \
$(DIR_SRC)/ft_player.c \
$(DIR_SRC)/ft_color.c
SRCS_MLX = $(DIR_SRC)/win_update.c \
$(DIR_SRC)/ft_vars.c \
$(DIR_SRC)/ft_image.c \
$(DIR_SRC)/ft_map.c
$(NAME): $(LIB_NAME)
$(CC) $(CFLAGS) main.c -I. -I$(DIR_MLX) -L$(DIR_MLX) -L. $(LFLAGS) $(LIB_FLAG) -o $# -g
$(DIR_OBJ)/$(OBJ).o: $(DIR_SRC)/$(SRCS).c
mkdir -p $(DIR_OBJ)
$(CC) $(CFLAGS) -c $< -I. -I$(DIR_MLX) -o $#
$(DIR_OBJ)/$(OBJ_MLX).o: $(DIR_SRC)/$(SRCS_MLX).c
mkdir -p $(DIR_OBJ)
$(CC) $(CFLAGS) -c $< -I. -I$(DIR_MLX) -L$(DIR_MLX) $(LFLAGS) -o $#
$(LIB_NAME): $(OBJ_MLX) LIB_OBJ
$(AR) $(LIB_NAME) $(OBJ)
ranlib $(LIB_NAME)
LIB_OBJ: $(OBJ)
$(AR) $(LIB_NAME) $(OBJ)
In the example above I´ve tried to create a lib with one kind of files and after that create a lib with the first lib with the others files. But I keep getting this error:
Makefile:41: warning: overriding recipe for target '.objs/'
Makefile:37: warning: ignoring old recipe for target '.objs/'
make: Warning: File 'Makefile' has modification time 454 s in the future
rm -f .objs/ft_utils.o .objs/ft_adt.o .objs/ft_circle.o .objs/ft_line.o .objs/ft_trgb.o .objs/ft_quadrilateral.o .objs/ft_player.o .objs/ft_color.o
rm -f libcub3d.a
rm -f main
make: *** No rule to make target 'src/src/win_update.c', needed by '.objs/win_update.o'. Stop.
How can I compile this objects with different lib?
P.S. Those are my variables:
DIR_OBJ = .objs
DIR_SRC = src
DIR_LIB = lib
DIR_MLX = ./minilibx-linux
NAME = main
LIB_NAME = libcub3d.a
OBJ = $(patsubst $(DIR_SRC)/%.c, $(DIR_OBJ)/%.o, $(SRCS))
OBJ_MLX = $(patsubst $(DIR_SRC)/%.c, $(DIR_OBJ)/%.o, $(SRCS_MLX))
CC = clang
CFLAGS = -Wall -Werror -Wextra
LFLAGS = -lmlx -lm -lX11 -lXext -lbsd
LIB_FLAG = -lcub3d
AR = ar -rc
RM = rm -f
These lines are definitely not right:
$(DIR_OBJ)/$(OBJ).o: $(DIR_SRC)/$(SRCS).c
...
$(DIR_OBJ)/$(OBJ_MLX).o: $(DIR_SRC)/$(SRCS_MLX).c
along with the way you've defined SRCS and SRCS_MLX and these:
OBJ = $(patsubst $(DIR_SRC)/%.c, $(DIR_OBJ)/%.o, $(SRCS))
OBJ_MLX = $(patsubst $(DIR_SRC)/%.c, $(DIR_OBJ)/%.o, $(SRCS_MLX))
Just expand the variables in the rule in your head, or else ask make to expand it for you with the info function, and you'll see it's definitely not right:
$(info output is '$(DIR_OBJ)/$(OBJ).o: $(DIR_SRC)/$(SRCS).c')

Make file in C giving fatal error

I am trying to create a makefile in C but i am facing some issues.
I have my main .c, one .c which keeps the functions implementations and one .h which keeps the functions declarations.
When i try to run the makefile, i get a fatal error.
here is my makefile:
INCL = prog.h
SRC = prog.c prog_fun.c
OBJ = $(SRC:.c=.o)
EXE = prog
CC = gcc
CFLAGS = -c
RM = rm -rf
all: prog
prog: prog.o prog_fun.o
gcc -o prog prog.o prog_fun.o
prog.o: prog.c
gcc -c prog.c
prog_fun.o: prog_fun.c prog.h
gcc -c prog.c
clean:
$(RM) $(OBJ) $(EXE)
The error i get is this:
gcc -c prog.c
prog.c:11:19: fatal error: prog.h: No such file or directory
compilation terminated.
Makefile:17: recipe for target 'prog.o' failed
make: *** [prog.o] Error 1
Can anyone please help me with this?
What you are trying to do by using this
prog_fun.o: prog_fun.c header.h
It should be only
prog_fun.o: prog_fun.c
Modify your make file as
xyz#xyz-PC:~$ vi makefile
INCL = header.h
SRC = prog.c prog_fun.c
OBJ = $(SRC:.c=.o)
EXE = prog
CC = gcc
CFLAGS = -c
RM = rm -rf
all: prog
prog: prog.o prog_fun.o
gcc -o prog prog.o prog_fun.o
prog.o: prog.c
gcc -c prog.c header.h
prog_fun.o: prog_fun.c
gcc -c prog_fun.c header.h
clean:
$(RM) $(OBJ) $(EXE)
next run it
xxyz#xyz-PC:~$ make
gcc -c prog.c header.h
gcc -c prog_fun.c header.h
gcc -o prog prog.o prog_fun.o
I hope it will work now and make sure indention is correct(not manual spaces, it should be tab key)

GCC symbol lookup error

I try to launch my executable but i got this error:
.dudac/stage/monkey/lib/hello.duda: undefined symbol: DDS_sequence_BoardGlobalParameters_BoardGPSoftState__alloc
Whereas link and compile work fine
Here is my makefile:
# ====================================
# Date : Tue 21, Feb 2017 at 10:15
NAME = hello
CC = /opt/windriver/wrlinux-small/7.0-xxxxxx-3543dr/sysroots/x86_64-wrlinuxsdk-linux/usr/bin/arm-wrs-linux-gnueabi/arm-wrs-linux-gnueabi-gcc
CFLAGS = -g -Wall -DDEBUG -L/opt/PrismTech/Vortex_v2/Device/VortexOpenSpliceRTE/6.7.1p2/RTS/armv7at2_vfp_neon.WRlinux7_gcc/lib -ldcpssac -ldcpsisocpp2
#-g -Wall -DDEBUG -fPIC
LDFLAGS =
DEFS =
INCDIR = -I/home/T0181049/.dudac/stage/monkey//include/ -I/home/T0181049/.dudac/stage/monkey//src/include -I/home/T0181049/.dudac/stage/monkey//plugins/duda/src -I/home/T0181049/.dudac/stage/monkey//plugins/duda/ -I/opt/PrismTech/Vortex_v2/Device/VortexOpenSpliceRTE/6.7.1p2/HDE/armv7at2_vfp_neon.WRlinux7_gcc/include -I/opt/PrismTech/Vortex_v2/Device/VortexOpenSpliceRTE/6.7.1p2/HDE/armv7at2_vfp_neon.WRlinux7_gcc/include/dcps/C/SAC -I/opt/PrismTech/Vortex_v2/Device/VortexOpenSpliceRTE/6.7.1p2/HDE/armv7at2_vfp_neon.WRlinux7_gcc/include/sys -I/opt/PrismTech/Vortex_v2/Device/VortexOpenSplice/6.7.1p1/HDE/x86_64.linux/include -I/opt/PrismTech/Vortex_v2/Device/VortexOpenSplice/6.7.1p1/HDE/x86_64.linux/include/sys -I/opt/windriver/wrlinux-small/7.0-xxxxx-3543dr/sysroots/armv7at2-vfp-neon-wrs-linux-gnueabi/usr/include -I/opt/windriver/wrlinux-small/7.0-xxxxx-3543dr/sysroots/armv7at2-vfp-neon-wrs-linux-gnueabi/usr/include/c++ -I/opt/windriver/wrlinux-small/7.0-xxxxxx-3543dr/sysroots/armv7at2-vfp-neon-wrs-linux-gnueabi/usr/include/c++/4.9.1 -I/opt/windriver/wrlinux-small/7.0-xxxxxx-3543dr/sysroots/armv7at2-vfp-neon-wrs-linux-gnueabi/usr/include/c++/4.9.1/arm-windriverv7atneon-linux-gnueabi -I/opt/windriver/wrlinux-small/7.0-xxxxx-3543dr/sysroots/armv7at2-vfp-neon-wrs-linux-gnueabi/usr/include/c++/4.9.1/backward -I/opt/windriver/wrlinux-small/7.0-xxxxx-3543dr/sysroots/armv7at2-vfp-neon-wrs-linux-gnueabi/usr/include/dtc -I/opt/windriver/wrlinux-small/7.0-xxxxxx-3543dr/sysroots/x86_64-wrlinuxsdk-linux/usr/lib/arm-wrs-linux-gnueabi/gcc/arm-wrs-linux-gnueabi/4.9.1/include -I/opt/windriver/wrlinux-small/7.0-xxxxx-3543dr/sysroots/x86_64-wrlinuxsdk-linux/usr/lib/arm-wrs-linux-gnueabi/gcc/arm-wrs-linux-gnueabi/4.9.1/include-fixed
OBJECTS = main.o
_PATH = $(patsubst /%, %, $(CURDIR))
_CC = #/bin/echo -e " [\033[33mCC\033[0m] $#"; $(CC)
_DD = #/bin/echo -e " [\033[32mDD\033[0m] $#"; $(CC)
_CC_QUIET = #/bin/echo -n; $(CC)
all: $(NAME).duda
$(NAME).duda: $(OBJECTS)
$(_DD) $(CFLAGS) $(DEFS) -shared -o $# $^ -lc $(LDFLAGS)
.c.o:
$(_CC) -c $(CFLAGS) $(DEFS) $(INCDIR) -fPIC $<
$(_CC_QUIET) -MM -MP $(CFLAGS) $(DEFS) $(INCDIR) $*.c -o $*.d > /dev/null &2>&1
clean:
rm -rf *.o *.d *~ $(NAME).duda
How do i resolve that ?
Thanks
During linking you have specified libraries that are not in the standard path
Solutions
link statically
Use LD_LIBRARY_PATH
Use LD_PRELOAD
Use rpath
I try to use rpath just like this but got the same error:
CFLAGS = -g -Wall -DDEBUG -L/opt/PrismTech/Vortex_v2/Device/VortexOpenSpliceRTE/6.7.1p2/HDE/armv7at2_vfp_neon.WRlinux7_gcc/lib -Wl,-rpath,/opt/PrismTech/Vortex_v2/Device/VortexOpenSpliceRTE/6.7.1p2/HDE/armv7at2_vfp_neon.WRlinux7_gcc/lib -ldcpssac -ldcpsisocpp2

Bloodshed Error 1 in C program (newbie, first C program)

So i just started learning C using bloodshed as my compiler and stuff....
i am using book "C for dummies".
So this is what i did->
File>New>Source File
Then wrote this code->
#include <stdio.h>
int main()
{
printf("Goodbye, cruel world!\n");
return(0);
}
Then went to Execute>Compile and Run.
But it says me in compiler as->
" C:\Users\Jaskaran\Documents\Makefile.win [Build Error] [Project1.exe] Error 1 "
Please help. This is basically my first C program.
My makefile.win content->
# Project: Project1
# Makefile created by Dev-C++ 4.9.9.2
CPP = g++.exe
CC = gcc.exe
WINDRES = windres.exe
RES =
OBJ = main.o $(RES)
LINKOBJ = main.o $(RES)
LIBS = -L"D:/Programs/Dev-Cpp/lib"
INCS = -I"D:/Programs/Dev-Cpp/include"
CXXINCS = -I"D:/Programs/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"D:/Programs/Dev-Cpp/include/c++/3.4.2/backward" -I"D:/Programs/Dev-Cpp/include/c++/3.4.2/mingw32" -I"D:/Programs/Dev-Cpp/include/c++/3.4.2" -I"D:/Programs/Dev-Cpp/include"
BIN = Project1.exe
CXXFLAGS = $(CXXINCS)
CFLAGS = $(INCS)
RM = rm -f
.PHONY: all all-before all-after clean clean-custom
all: all-before Project1.exe all-after
clean: clean-custom
${RM} $(OBJ) $(BIN)
$(BIN): $(OBJ)
$(CC) $(LINKOBJ) -o "Project1.exe" $(LIBS)
main.o: main.c
$(CC) -c main.c -o main.o $(CFLAGS)
Use regular double-quotes like this: "

Makefile Error : Command Not Found- while creating a shared library

I have 4 .c files hello.c,here.c,bye.c and main.c.
One header file mylib.h
The contents are as follows
hello.c
#include<stdio.h>
void hello()
{
printf("Hello!\n");
}
here.c
#include<stdio.h>
void here()
{
printf("I am here \n");
}
bye.c
#include<stdio.h>
void bye()
{
printf("Bye,Bye");
}
main.c
#include<stdio.h>
#include "mylib.h"
int main()
{
hello();
here();
bye();
return 1;
}
mylib.h
#ifndef _mylib_
#define _mylib_
void hello();
void here();
void bye();
#endif
The makefile for creating a static lib is :
Makefile
#Which Compiler
CC = gcc
#Compiler Flags
CFLAGS = - Wall -c -fPIC
DYNLINKFLAGS = -shared -W1,-soname,$#.0
PROG = main
PROG_OBJS = main.c
LIB = mylib
LIB_FILES = libmylib.so
LIB_MINOR = $(LIB_FILES).0.1
LIB_RELEASE = $(LIB_MINOR).0
LIB_OBJS = hello.o here.o bye.o
PATH = /home/srinivasa/cspp51081/labs/srinivasa.lab2.1
all: $(LIB_FILES) $(PROG)
#Create Lib with this file
$(LIB_FILES): $(LIB_OBJS)
$(CC) $(DYNLINKFLAGS) $^
ln -sf $(LIB_RELEASE) $(LIB_MINOR)
ln -sf $(LIB_MINOR) $#
ln -sf $# $#.0
#Compiling main program and link with shared library
$(PROG): $(PROG_OBJS)
$(CC) -o $(PROG) $(PORG_OBJS) -l$(LIB) -L$(PATH)
main.o: main.c
hello.o: hello.c
here.o: here.c
bye.o: bye.c
#clean files
clean:
rm -rf $(LIB_OBJS) $(LIB_FILES) $(LIB_RELEASE) $(LIB_MINOR) libmylib.so.0
Problem: When I execute the command
make -f Makefile all
I get the error:
gcc -Wall -fPIC -c -o hello.o hello.c
make: gcc: Command not found
make: * [hello.o] Error 127
Questions : How do I resolve this?
+++++
OK. Lets revert to your original code, but with a small difference.
Change DYNLINKFLAGS back to:
DYNLINKFLAGS = -shared -Wl,-soname,$#.0
Then change the library link to:
$(CC) $(DYNLINKFLAGS) -o $(LIB_RELEASE) $^
ln -sf $(LIB_RELEASE) $(LIB_MINOR)
ln -sf $(LIB_MINOR) $#
ln -sf $# $#.0
Do "rm -f lib*", build and then post make output.
There are a few bugs (just typos) I can see is:
space between - and Wall:
CFLAGS = - Wall -c -fPIC
^
PORG_OBJS should be PROG_OBJS
$(CC) -o $(PROG) $(PORG_OBJS) -L$(PATH)
^^^^
You are doing an absolute assignment to PATH. Now every executable called in makefile will be search in that directory. Since gcc is not found in that directory you get this error. To fix this you can either use a different variable name or add your directory to current path as:
PATH := $(PATH):/home/srinivasa/cspp51081/labs/srinivasa.lab2.1
^ ^^^^^^^^
Try changing this line from:
$(CC) -o $(PROG) $(PORG_OBJS) -l$(LIB) -L$(LIBPATH)
to:
$(CC) -o $(PROG) $(PORG_OBJS) -L$(LIBPATH) -l$(LIB)
The -L flag needs to precede the -l flags.
OK. First change:
DYNLINKFLAGS = -shared -W1,-soname,$#.0
to
DYNLINKFLAGS = -shared -W1,-soname,$#
Then change:
ln -sf $(LIB_RELEASE) $(LIB_MINOR)
ln -sf $(LIB_MINOR) $#
ln -sf $# $#.0
To:
ln -sf $# $(LIB_RELEASE)
ln -sf $# $(LIB_MINOR)
ln -sf $# $#.0
Then post the library links and the final executable link.

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