LinuxQuestions.org - Problems building SpatiaLite

I try to build SpatiaLite 3.0.1 (spatial data support for SQLite) on the top of system SQLite library. My system is 32bit Slackware 13.37. Also I have next packages (dependencies) installed:

SQLite 3.7.5 (shipped with distro)
Proj 4.7.0 (self-compiled)
GEOS 3.3.1 (self-compiled)

The first problem is that configure script failed with message:

Code:

checking for sqlite3_prepare_v2 in -lsqlite3... no

configure: error: 'libsqlite3' is required but it doesn't seem to be installed on this system.

That's strange because Slackware comes with SQLite 3.7.5. In configure.log I found next lines

Code:

configure:16925: checking for sqlite3_prepare_v2 in -lsqlite3

configure:16950: gcc -o conftest -g -O2   conftest.c -lsqlite3 -lm  >&5

/usr/lib/gcc/i486-slackware-linux/4.5.2/../../../libsqlite3.so: undefined reference to `dlsym'

/usr/lib/gcc/i486-slackware-linux/4.5.2/../../../libsqlite3.so: undefined reference to `dlerror'

/usr/lib/gcc/i486-slackware-linux/4.5.2/../../../libsqlite3.so: undefined reference to `dlopen'

/usr/lib/gcc/i486-slackware-linux/4.5.2/../../../libsqlite3.so: undefined reference to `dlclose'

collect2: ld returned 1 exit status

configure:16950: $? = 1

configure: failed program was:

For me this looks like dynamic linker is not used. I "fix" this by modifying configure script and adding "-ldl" to LIBS variable. After this changes all necessary libraries are found except iconv.

Code:

checking for iconv.h... yes

checking for library containing iconv... no

checking for library containing libiconv... no

configure: error: 'libiconv' is required but it doesn't seem to be installed on this system.

Running

Code:

nm /lib/libc.so.6 | grep iconv

gives me

Code:

000179a0 T iconv

00017b40 T iconv_close

00017610 T iconv_open

So this functionality available in C-runtime library, but for some reasons configure didn't find it.

Any ideas what is wrong? Is this Slackware issue or there is something wrong with my installation?