Re: Newbie Automake Problem

[JASON TILLEY]

I have been editing my Makefile since the original post, so the linker is no 
longer getting ‘-lm -lcsa’. The final lines now look like this:

/bin/sh ./libtool  --tag=CC   --mode=link /opt/local/bin/gcc  -O2 -m64 -fPIC -g 
-Wall  -L/opt/local/lib -o csabathy src/csabathy-csa.o src/csabathy-svd.o 
src/csabathy-minell.o libcsa.la -lm -L/opt/local/lib
libtool: link: /opt/local/bin/gcc -O2 -m64 -fPIC -g -Wall -o .libs/csabathy 
src/csabathy-csa.o src/csabathy-svd.o src/csabathy-minell.o  -L/opt/local/lib 
./.libs/libcsa.dylib -lm
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
make: *** [csabathy] Error 1

My Makefile.am contains this currently:

ACLOCAL_AMFLAGS = -I m4 --install

lib_LTLIBRARIES = libcsa.la
libcsa_la_SOURCES = src/csa.c \
                    src/svd.c \
                    src/minell.c
libcsa_la_LIBADD = -lm

include_HEADERS = src/csa.h src/svd.h src/minell.h src/nan.h

bin_PROGRAMS = csabathy
csabathy_SOURCES = src/csa.c \
                   src/csa.h \
                   src/svd.c \
                   src/svd.h \
                   src/minell.c \
                   src/minell.h \
                   src/nan.h
csabathy_CFLAGS = $(AM_CFLAGS)
csabathy_LDADD = libcsa.la -lm
csabathy_DEPENDENCIES = src/csa.lo \
                        src/svd.lo \
                        src/minell.lo

EXTRA_DIST = /src/m4/NOTES

Thanks for the help.



> On Jun 30, 2016, at 11:57 PM, Václav Haisman <address@hidden> wrote:
> 
> On 30 June 2016 at 03:03, JASON TILLEY <address@hidden> wrote:
>> I am trying to create a Makefile.am for a package on github in order to make 
>> it more friendly to packaging (https://github.com/sakov/csa-c). I am having 
>> linking problems on my Mac. I’m sure its my complete lack of understanding 
>> of Automake. My make command executes the following:
>> 
>> depbase=`echo src/csa.lo | sed 's|[^/]*$|.deps/&|;s|\.lo$||'`;\
>>        /bin/sh ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. 
>> -I./src     -g -O2 -MT src/csa.lo -MD -MP -MF $depbase.Tpo -c -o src/csa.lo 
>> src/csa.c &&\
>>        mv -f $depbase.Tpo $depbase.Plo
>> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I./src -g -O2 -MT src/csa.lo -MD 
>> -MP -MF src/.deps/csa.Tpo -c src/csa.c  -fno-common -DPIC -o src/.libs/csa.o
>> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I./src -g -O2 -MT src/csa.lo -MD 
>> -MP -MF src/.deps/csa.Tpo -c src/csa.c -o src/csa.o >/dev/null 2>&1
>> depbase=`echo src/svd.lo | sed 's|[^/]*$|.deps/&|;s|\.lo$||'`;\
>>        /bin/sh ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. 
>> -I./src     -g -O2 -MT src/svd.lo -MD -MP -MF $depbase.Tpo -c -o src/svd.lo 
>> src/svd.c &&\
>>        mv -f $depbase.Tpo $depbase.Plo
>> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I./src -g -O2 -MT src/svd.lo -MD 
>> -MP -MF src/.deps/svd.Tpo -c src/svd.c  -fno-common -DPIC -o src/.libs/svd.o
>> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I./src -g -O2 -MT src/svd.lo -MD 
>> -MP -MF src/.deps/svd.Tpo -c src/svd.c -o src/svd.o >/dev/null 2>&1
>> depbase=`echo src/minell.lo | sed 's|[^/]*$|.deps/&|;s|\.lo$||'`;\
>>        /bin/sh ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. 
>> -I./src     -g -O2 -MT src/minell.lo -MD -MP -MF $depbase.Tpo -c -o 
>> src/minell.lo src/minell.c &&\
>>        mv -f $depbase.Tpo $depbase.Plo
>> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I./src -g -O2 -MT src/minell.lo 
>> -MD -MP -MF src/.deps/minell.Tpo -c src/minell.c  -fno-common -DPIC -o 
>> src/.libs/minell.o
>> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I./src -g -O2 -MT src/minell.lo 
>> -MD -MP -MF src/.deps/minell.Tpo -c src/minell.c -o src/minell.o >/dev/null 
>> 2>&1
>> /bin/sh ./libtool  --tag=CC   --mode=link gcc  -g -O2   -o libcsa.la -rpath 
>> /usr/local/lib src/csa.lo src/svd.lo src/minell.lo
>> libtool: link: gcc -dynamiclib -Wl,-undefined -Wl,dynamic_lookup -o 
>> .libs/libcsa.0.dylib  src/.libs/csa.o src/.libs/svd.o src/.libs/minell.o    
>> -g -O2   -install_name  /usr/local/lib/libcsa.0.dylib -compatibility_version 
>> 1 -current_version 1.0 -Wl,-single_module
>> libtool: link: (cd ".libs" && rm -f "libcsa.dylib" && ln -s "libcsa.0.dylib" 
>> "libcsa.dylib")
>> libtool: link: ar cru .libs/libcsa.a  src/csa.o src/svd.o src/minell.o
>> libtool: link: ranlib .libs/libcsa.a
>> libtool: link: ( cd ".libs" && rm -f "libcsa.la" && ln -s "../libcsa.la" 
>> "libcsa.la" )
>> gcc -DHAVE_CONFIG_H -I. -I./src     -g -O2 -MT src/csabathy-csa.o -MD -MP 
>> -MF src/.deps/csabathy-csa.Tpo -c -o src/csabathy-csa.o `test -f 'src/csa.c' 
>> || echo './'`src/csa.c
>> mv -f src/.deps/csabathy-csa.Tpo src/.deps/csabathy-csa.Po
>> gcc -DHAVE_CONFIG_H -I. -I./src     -g -O2 -MT src/csabathy-svd.o -MD -MP 
>> -MF src/.deps/csabathy-svd.Tpo -c -o src/csabathy-svd.o `test -f 'src/svd.c' 
>> || echo './'`src/svd.c
>> mv -f src/.deps/csabathy-svd.Tpo src/.deps/csabathy-svd.Po
>> gcc -DHAVE_CONFIG_H -I. -I./src     -g -O2 -MT src/csabathy-minell.o -MD -MP 
>> -MF src/.deps/csabathy-minell.Tpo -c -o src/csabathy-minell.o `test -f 
>> 'src/minell.c' || echo './'`src/minell.c
>> mv -f src/.deps/csabathy-minell.Tpo src/.deps/csabathy-minell.Po
>> /bin/sh ./libtool  --tag=CC   --mode=link gcc  -g -O2 '-lm -lcsa'  -o 
>> csabathy src/csabathy-csa.o src/csabathy-svd.o src/csabathy-minell.o 
>> libcsa.la
>> libtool: link: gcc -g -O2 -o .libs/csabathy src/csabathy-csa.o 
>> src/csabathy-svd.o src/csabathy-minell.o  -lm 
>> /Users/username/Downloads/csa-c-master/.libs/libcsa.dylib 
>> ./.libs/libcsa.dylib
>> Undefined symbols for architecture x86_64:
>>  "_main", referenced from:
>>     implicit entry/start for main executable
>> ld: symbol(s) not found for architecture x86_64
>> collect2: error: ld returned 1 exit status
>> make: *** [csabathy] Error 1
>> 
>> Does anyone know what this error means? Thanks.
> 
> Where is the Makefile.am? We need to see that to be able to diagnose your 
> issue.
> 
> At least the '-lm -lcsa' argument on the linking command looks fishy.
> 
> -- 
> VH