I want to use a library created by libtool in an autoconf subproject but I get:
$ make
[...]
gcc -g -O2 -o test test.o liba/liba.la
liba/liba.la: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:417: test] Error 1
configure.ac
AC_INIT([test], [1.0.0])
AM_INIT_AUTOMAKE([foreign subdir-objects])
AC_CONFIG_SUBDIRS([liba])
AC_PROG_CC
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
Makefile.am
SUBDIRS = liba
bin_PROGRAMS = test
test_SOURCES = test.c
test_LDADD = liba/liba.la
test.c
int main()
{
}
liba/configure.ac
AC_INIT([liba], [1.0.0])
AM_INIT_AUTOMAKE([foreign subdir-objects])
LT_INIT
AC_CONFIG_FILES([Makefile])
AC_CONFIG_MACRO_DIRS([m4])
AC_OUTPUT
liba/Makefile.am
ACLOCAL_AMFLAGS = -I m4
lib_LTLIBRARIES = liba.la
liba_la_SOURCES = liba.c
liba/liba.c
mkdir -p liba/m4
autoreconf -i
[...]
./configure
[...]
make
[...]
gcc -g -O2 -o test test.o liba/liba.la
liba/liba.la: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:417: test] Error 1
It should be something like:
gcc -g -O2 -o test test.o liba/.libs/liba.so
When I put the library and the program in the same autoconf/automake project it works but not if I use a sub project.
As workaroud it works if I use:
test_LDADD = liba/.libs/liba.so
but I think it's a workaround not a proper solution.
To fix the error just add LT_INIT in the configure.ac.