undefined reference to "..."

[zqiang320]

Hello:

I execute make ,then get error:

$ make
Making all in libsbml/src
make[1]: Entering directory `/home/internet/mydoc/test_pj/libsbml/src'
........
/bin/sh ./libtool --tag=CC --mode=link gcc -g -O2 -o test test.o
libsbml/src/libsbml.la -lsbml -lstdc++ -lm
mkdir .libs
gcc -g -O2 -o .libs/test test.o libsbml/src/.libs/libsbml.so -lstdc++
-lm -Wl,--rpath -Wl,/usr/local/lib
libsbml/src/.libs/libsbml.so: undefined reference to `safe_strdup'
libsbml/src/.libs/libsbml.so: undefined reference to
`util_bsearchSt ringsI'
libsbml/src/.libs/libsbml.so: undefined reference to `safe_malloc'
libsbml/src/.libs/libsbml.so: undefined reference to `util_PosInf'
libsbml/src/.libs/libsbml.so: undefined reference to `util_isInf'
libsbml/src/.libs/libsbml.so: undefined reference to `util_NaN'
libsbml/src/.libs/libsbml.so: undefined reference to `safe_calloc'
libsbml/src/.libs/libsbml.so: undefined reference to
`strcmp_insensi tive'
libsbml/src/.libs/libsbml.so: undefined reference to `c_locale_strto d'

Why system can not find these function ,they are system file
<stdlib.h<new<c math>
which has been included in my app.c.
What should I do?
Eager to receive your reply!

my configure.in file:

AC_INIT(main, 0.1, zqiang320@gmail .com)
AM_INIT_AUTOMAK E(foreign)
AC_PROG_CC
AC_PROG_CXX
AM_PROG_LIBTOOL
AC_OUTPUT(Makef ile libsbml/src/Makefile)

my Makefile.am file:

bin_PROGRAMS = test
SUBDIRS = libsbml/src .
test_SOURCES = test.c

test_LDADD = libsbml/src/libsbml.la -lsbml -lstdc++ -lm

AM_CPPFLAGS = -Ilibsbml/include

my libsbml/src/Makefile.am

AUTOMAKE_OPTS = gnu
lib_LTLIBRARIES = libsbml.la
libsbml_la_SOUR CES = common/libsbml-version.cpp math/ASTNode.cpp math/
FormulaTokenize r.c util/List.cpp
AM_CPPFLAGS = -I../include -lsbml -lstdc++ -lm

[Ian Collins]

Re: undefined reference to &quot;...&qu ot;

zqiang320 wrote:

Hello:
>
I execute make ,then get error:
>
$ make
Making all in libsbml/src
make[1]: Entering directory `/home/internet/mydoc/test_pj/libsbml/src'
........
/bin/sh ./libtool --tag=CC --mode=link gcc -g -O2 -o test test.o
libsbml/src/libsbml.la -lsbml -lstdc++ -lm
mkdir .libs

>
Why system can not find these function ,they are system file
<stdlib.h<new<c math>
which has been included in my app.c.

You are building something as C++ and this is a C group. If you should
be building as C, fix things so you do, if you are building C++ code,
try a platform or gnu list where you will get better help. Tool
problems are as off topic on c.l.c++ as they are here.

--
Ian Collins.

[William Pursell]

Re: undefined reference to &quot;...&qu ot;

On 27 Sep, 04:08, zqiang320 <zqiang...@gmai l.comwrote:

I execute make ,then get error:

<snip>

libsbml/src/.libs/libsbml.so: undefined reference to `safe_strdup'

<snip>

>
Why system can not find these function ,they are system file
<stdlib.h<new<c math>
which has been included in my app.c.
What should I do?

Your questions are not about the C language, and you will
get better answers if you ask elsewhere. However, this
question indicates a fundamental misunderstandin g about
header files and libraries. If a function is declared
in the header and you include that header, then the
compiler has a declaration of the function, but
the linker does not necessarily have a definition
of the function. Consider this example:

/* BROKEN CODE */
extern int foo( int );
int main( void )
{
return foo( 5 );
}

Would you expect this to build? Chances are good you'll
get an error something like:

Undefined symbols:
"_foo", referenced from:
_main in cc46tCIn.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

The situation is the same if foo is declared in foo.h and
you write:
#include <foo.h>
int main( void ) { return foo(); }

Declarations appearing in the header files have (almost)
absolutely nothing to do with the error you are seeing.