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Full Discussion: A question about Makefile run by GNU make
Top Forums Programming A question about Makefile run by GNU make Post 302423067 by jharish on Thursday 20th of May 2010 05:54:55 AM
Old 05-20-2010
In simple words the error means there are two main functions since you have included file1.c twice here
Code:
gcc file1.c mathfun1.o file1.c -o file1

What you can do to solve your problem is build two object files mathfun1.o and file1.o and build the executable "file1" including both these object files. Your makefile would look something like this
Code:
CCFLAGS=-c -Wall
CC=gcc

file1:mathfun1.o file1.o
        $(CC) $^ -o $@

file1.o:file1.c
        $(CC) $(CCFLAGS) file1.c
mathfun1.o:mathfun1.c
        $(CC) $(CCFLAGS) mathfun1.c

clean:
        rm *.o file1

Regards,
Harish J
This User Gave Thanks to jharish For This Post:
dariyoosh
 

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LEARN ABOUT REDHAT

xmkmf

XMKMF(1)						      General Commands Manual							  XMKMF(1)

NAME

       xmkmf - create a Makefile from an Imakefile

SYNOPSIS

       xmkmf [ -a ] [ topdir [ curdir ] ]

DESCRIPTION

       The xmkmf command is the normal way to create a Makefile from an Imakefile shipped with third-party software.

       When  invoked with no arguments in a directory containing an Imakefile, the imake program is run with arguments appropriate for your system
       (configured into xmkmf when X was built) and generates a Makefile.

       When invoked with the -a option, xmkmf builds the Makefile in the current directory, and then automatically executes ``make Makefiles'' (in
       case  there are subdirectories), ``make includes'', and ``make depend'' for you.  This is the normal way to configure software that is out-
       side the X Consortium build tree.

       If working inside the X Consortium build tree (unlikely unless you are an X developer, and even then this option is never really used), the
       topdir  argument  should be specified as the relative pathname from the current directory to the top of the build tree.	Optionally, curdir
       may be specified as a relative pathname from the top of the build tree to the current directory.  It is necessary to supply curdir  if  the
       current	directory  has	subdirectories, or the Makefile will not be able to build the subdirectories.  If a topdir is given, xmkmf assumes
       nothing is installed on your system and looks for files in the build tree instead of using the installed versions.

SEE ALSO

       imake(1)

X Version 11							    Release 6.6 							  XMKMF(1)
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