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File was created for an unsupported file format that is not architecture related (x86_64)

I have a build file on OSX Lion

VPATH = src include
CFLAGS ="-I include -std=gnu99"

hello: hello.o
    gcc $^ -o $@

hello.o: hello.h hello.c
    gcc $(CFLAGS) -c $< -o $@

But when I try to run this make file, I get the following error:

    ld: warning: ignoring file hello.o, file was built for unsupported file format which is not the architecture being linked (x86_64)
Undefined symbols for architecture x86_64:
  "_main", referenced from:
      start in crt1.10.6.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

I tried using the flag -arch x86_64, but still getting the same error.

Running this archyields i386.

uname -a tells me: Darwin Kernel Version 11.3.0: Thu Jan 12 18:47:41 PST 2012; root:xnu-1699.24.23~1/RELEASE_X86_64 x86_64

I also tried to add a switch -march=x86-64, as described in this answer, the file was created for i386, which is not related to architecture (x86_64) when compiling OpenCV2.2 for iOS 4.2 on Mac OSX 10.6 , but this did not work for me.

Exit from the command line:

gcc -I include -std=gnu99 -m64  -c include/hello.h -o hello.o  
gcc -I include -std=gnu99 -m64  hello.o -o hello
ld: warning: ignoring file hello.o, file was built for unsupported file format which is not the architecture being linked (x86_64)
Undefined symbols for architecture x86_64:
  "_main", referenced from:
      start in crt1.10.6.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [hello] Error 1
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3 answers
  • Delete all object files.

  • Repeat the makefile as:

    VPATH   = src include
CFLAGS  = -I include -std=gnu99 -m64
CC      = gcc
LDLIBS  =
LDFLAGS =

hello: hello.o
    $(CC) $(CFLAGS) $^ -o $@

hello.o: hello.c hello.h
    $(CC) $(CFLAGS) -c $< -o $@ $(LDFLAGS) $(LDLIBS)

, . CFLAGS . . -m64 64- ; , . LDFLAGS LDLIBS ( , ), , , .

make , :

IFLAGS = -Iinclude
WFLAG1 = -Wall
WFLAG2 = -Werror
WFLAG3 = -Wextra
WFLAGS = $(WFLAG1) $(WFLAG2) $(WFLAG3)
OFLAGS = -g -O3
SFLAG1 = -std=c99
SFLAG2 = -m64
SFLAGS = $(SFLAG1) $(SFLAG2)
DFLAGS = # -Doptions
UFLAGS = # Set on make command line only
CFLAGS = $(SFLAGS) $(DFLAGS) $(IFLAGS) $(OFLAGS) $(WFLAGS) $(UFLAGS)

, C . , 32- , :

make SFLAG2=-m32

Etc. , , xFLAGn . , make , , make .

( CC="gcc -m64" 64- .)

+3

, .h ...

+1

-M . , - .

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