Make file problem?

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http://stackoverflow.com/questions/5528958/make-file-problem Why when i compile my program with my makefile I obtain that : gcc -Wall -pedantic src/main.c -o _wk/main.o src/main.c:9:11: warning: C++ style comments are not allowed in ISO C90 src/main.c:9:11: warning: (this will be reported only once per input file) src/main.c: In function ‘initialiseStructItimerval’: src/main.c:46: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘__suseconds_t’ src/main.c: In function ‘stockeRetard’: src/main.c:71: warning: ISO C90 forbids mixed declarations and code src/main.c: In function ‘main’: src/main.c:141: warning: ISO C90 forbids mixed declarations and code src/main.c:139: warning: unused variable ‘i’ Debut de l'edition des liens... cd _wk ; gcc -o ../test main.o main.o: In function `_start': (.text+0x0): multiple definition of `_start' /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 0 has invalid symbol index 12 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 1 has invalid symbol index 13 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 2 has invalid symbol index 2 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 3 has invalid symbol index 2 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 4 has invalid symbol index 12 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 5 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 6 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 7 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 8 has invalid symbol index 2 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 9 has invalid symbol index 2 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 10 has invalid symbol index 13 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 11 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 12 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 13 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 14 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 15 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 16 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 17 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 18 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 19 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 20 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 21 has invalid symbol index 14 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_info): relocation 22 has invalid symbol index 22 /usr/bin/ld: /usr/lib/debug/usr/lib/crt1.o(.debug_line): relocation 0 has invalid symbol index 2 /usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/crt1.o:/build/buildd/eglibc-2.11.1/csu/../sysdeps/i386/elf/start.S:119: first defined here main.o:(.rodata+0x0): multiple definition of `_fp_hw' /usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/crt1.o:(.rodata+0x0): first defined here main.o: In function `_fini': (.fini+0x0): multiple definition of `_fini' /usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/crti.o:(.fini+0x0): first defined here main.o:(.rodata+0x4): multiple definition of `_IO_stdin_used' /usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/crt1.o:(.rodata.cst4+0x0): first defined here main.o: In function `__data_start': (.data+0x0): multiple definition of `__data_start' /usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/crt1.o:(.data+0x0): first defined here main.o: In function `__data_start': (.data+0x4): multiple definition of `__dso_handle' /usr/lib/gcc/i486-linux-gnu/4.4.3/crtbegin.o:(.data+0x0): first defined here main.o: In function `_init': (.init+0x0): multiple definition of `_init' /usr/lib/gcc/i486-linux-gnu/4.4.3/../../../../lib/crti.o:(.init+0x0): first defined here /usr/lib/gcc/i486-linux-gnu/4.4.3/crtend.o:(.dtors+0x0): multiple definition of `__DTOR_END__' main.o:(.dtors+0x4): first defined here collect2: ld returned 1 exit status make: *** [all] Erreur 1 My makefile is this : CC=gcc LD=gcc C_FLAGS= -Wall -pedantic #Dossier de workarea pour la generation RWK=_wk #Liste des dossier dans lesquels effectuer la recherche ordonnee DIRS= \ src \ bin \ $(RWK) #Definition de la liste des sources C a compiler SRC_C=$(shell (for src in $$(find . -type f -name *.c) ; do basename $$src ; done)) #Liste des fichiers objets C_OBJS=$(SRC_C:.c=.o) vpath %.c $(DIRS) #Regle principale all: init_wk $(C_OBJS) @echo "Debut de l'edition des liens..." cd $(RWK) ; $(LD) -o test $(C_OBJS) @echo "Compilation terminee." #Regle de generation des fichier c->o %.o : %.c @echo "Compilation des .c : $<" $(CC) $(C_FLAGS) $< -o $(RWK)/$@ #Regle a appeler pour le nettoyage de RWK clean: @echo "Nettoyage du dossier de travail" @if [ -d $(RWK) ] ; then rm -rf $(RWK) ; fi #Regle d'initialisation de la workarea init_wk: clean @echo "Creation du dossier de travail..." @mkdir $(RWK) @if [ -e ./out ]; then echo "Existe deja"; else mkdir ./out; fi But when i try with a simple makefile like that and with no folder inclusion i've no errors: CC=gcc LD=gcc BIN = hello SRCS=$(wildcard *.c) OBJS = $(SRCS:.c=.o) DEPS = $(SRCS:.c=.d) CFLAGS = -W -Wall -pedantic all: $(BIN) $(BIN): $(OBJS) $(LD) -o $@ $(OBJS) %.o: %.c $(CC) -o $@ -c $< $(CFLAGS) %.d: %.c $(CC) $(CFLAGS) -MM -MD -o $@ $< -include $(DEPS) .PHONY: clean distclean clean: rm -rf $(OBJS) Sorry for this long post but i don't understand my mistake :/ c  makefile  compiler-errors share | improve this question asked  Apr 3 '11 at 10:15 Liszto 33 1 1 3

You could also add -std=c99 to get rid of some of the warnings. –  Bo Persson  Apr 3 '11 at 10:50 Was this post useful to you?

3 Answers

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up vote 8 down vote accepted	When compiling single modules only (not linking them), add -c as a compiler parameter to keep it from linking the c/c++ runtime every time. When you'd like to get a executable or library file, don't add -c. If you'd like to get a .o file, add -c. share | improve this answer answered  Apr 3 '11 at 10:21 Mario 10k 1 5 23
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up vote 5 down vote	%.o : %.c @echo "Compilation des .c : $<" $(CC) $(C_FLAGS) $< -o $(RWK)/$@ There is a problem here: without the -c option, gcc will compile and link. Try with this: $(CC) $(C_FLAGS) -c $< -o $(RWK)/$@ Also, it is much more common to have $(CFLAGS) than $(C_FLAGS) share | improve this answer answered  Apr 3 '11 at 10:21 Mat 71.9k 9 70 116
	Indeed. Thanks for your help. How can I forgot that -_-. Thanks you again for that ;) –  Liszto  Apr 3 '11 at 10:28 feedback

up vote 0 down vote	I had the same problem. I had accedentally deleted my main function. You might check that yours is still there. share | improve this answer answered  Mar 31 '12 at 21:28 qwerty9967 81 5
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