On Mon, 30 Oct 2000, kason wong wrote:
> I guess I finally understand. but i still have problem in compiling one lib:
>libutil.so which
> used the libpthread.a lib in c. I try to convert libpthread.a to .so, it seems
>strange but
> when i load it:
>
> ld -shared -o libpthread.so --whole-archive /local/usr/lib/libpthread.a
> ldd -r libpthread.so
> statically linked
>
> I think this is the main problem when i convert libutil.a to libutil.so and i try to
>load
> libutil.so
Where is libutil.a coming from? if that's your code, then you aren't linking
it properly. Convert any lib*.a files it depends upon to lib*.so, then use
the g++ -shared -o libutil.so command to create it. Then ldd -r libutil.so
and make sure it found everything it needed. If it didn't, add the missing
library to the g++ command and try again until it finds every symbol it needs.
Then you will be able to loadLibrary("util") and see it work.
If you're creating a .a file, by definition that doesn't include all the
dependent routines.
Here's my entire Makefile. It has exactly the stuff you need, I suggest
you use a copy of it and edit appropriately. Mass-replace libjsystem.so
with your libutil.so. Stick -lpthread into LINKLIBS. Stuff in LINKLIBS
is system libs which already have *.so files. Edit paths to refer to your
directories instead of mine.
Any libs you possess which are only in lib*.a form should be placed
in APILIBS. Put their *.so forms in APISOLIBS. Place your final
library, libutil.so, in JAPILIBS. Then edit the build rule for
libjsystem.so to name it libutil.so, and adjust the *.c and *.h filenames
appropriately. Don't change anything else on the line.
I've also attached my bash script which returns an error code if the ldd -r
command returns undefined errors. That causes make to stop and whine
if the build fails, otherwise make doesn't know it's a bad build.
------------------------------------------------------------------------
.SUFFIXES : .h .c .a .so .java .class
.a.so:
ld -shared -o $*.so --whole-archive $<
nm $*.so >$*.symbols
.java.class:
true
#
# location of JVM we're linking to
#
# Sun's 1.2.2
#
JAVA_HOME=/usr/local/java/jdk1.2.2
JAVA_INC= -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux
JAVAH=/usr/local/java/jdk1.2.2/bin/javah
#
# gcc configurable compile options
# -H list include header names
# -g debugging code enabled
GCCOPT= -g
LDOPT=-Xlinker -t -Xlinker -Map -Xlinker /tmp/linkmap -Xlinker -cref
GCCDEF=-DIP_SUPPORT -DUNIX
#
# Where the library.so file is written
#
LIBOUT=$(HOME)/lib
#
# Carol's C api libraries in their converted form
# These start as .a files, I have to convert them to
# shareable .so files for JNI to access them.
#
JAPILIBS=\
$(LIBOUT)/libjsystem.so
# $(LIBOUT)/libjnat.so \
# $(LIBOUT)/libjudpmsg.so \
# $(LIBOUT)/libjuser.so \
# $(LIBOUT)/libjvoip.so
APISOLIBS=$(LIBOUT)/libnat.so \
$(LIBOUT)/libsystem.so \
$(LIBOUT)/libudpmsg.so \
$(LIBOUT)/libuser.so \
$(LIBOUT)/libvoip.so
APILIBS=$(LIBOUT)/libnat.a \
$(LIBOUT)/libsystem.a \
$(LIBOUT)/libudpmsg.a \
$(LIBOUT)/libuser.a \
$(LIBOUT)/libvoip.a
LINKLIBS=-L$(LIBOUT) -lnat -lsystem -ludpmsg -luser -lvoip -lc
#
# Project's root directory
#
PROJ=$(HOME)/jbproject/NSApi
#
# Project's source root and classpath root
#
SRC=$(PROJ)/src
CLASSES=$(PROJ)/classes
#
# base name of the library
#
LIBNAME=jsubsystem
#
# C Source files for gcc command
#
CSRC=$(SRC)/JNsApiSubsystemInterfaces.c
#
# Java Class files
#
JCLASSES= $(CLASSES)/com/aravox/nsapi/*.class \
$(CLASSES)/com/aravox/nsapi/subsystem/*.class
#
# all sources lib depends upon
#
ALLSRC= $(SRC)/*.h $(SRC)/*.c $(JCLASSES)
all: $(APISOLIBS) $(JAPILIBS) $(ALLSRC) $(CLASSES)/md5_sha1
$(LIBOUT)/libjsystem.so: \
$(SRC)/JNsApiSubsystemInterfaces.h \
$(SRC)/JNsApiSubsystemInterfaces.c \
$(CLASSES)/com/aravox/nsapi/subsystem/JNsApiSubsystemInterfaces.class
- rm -f $@
@echo Creating $@...
gcc $(GCCOPT) $(GCCDEF) $(JAVA_INC) -I$(SRC) \
$(LDOPT) \
-shared -o $@ $(SRC)/JNsApiSubsystemInterfaces.c \
$(LIBOUT)/lib*.so
/home/joi/bin/anyUndefined $(LIBOUT)/lib*.so
$(SRC)/JNsApiSubsystemInterfaces.h:
$(SRC)/com/aravox/nsapi/subsystem/JNsApiSubsystemInterfaces.java
- ls -lart $(SRC)/com/aravox/nsapi/subsystem/JNsApiSubsystemInterfaces.java
$(SRC)/JNsApiSubsystemInterfaces.h $(SRC)/JNsApiSubsystemInterfaces.h
$(JAVAH) \
-classpath $(CLASSES) \
-o $(SRC)/JNsApiSubsystemInterfaces.h \
com.aravox.nsapi.subsystem.JNsApiSubsystemInterfaces
echo "$(SRC)/JNsApiSubsystemInterfaces.h regenerated";
$(SRC)/com/aravox/nsapi/JNsApiSubsystemInterfaces.java:
@echo "Nothing to do."
------------------------------------------------------------------------
--
Joi Ellis Software Engineer
Aravox Technologies [EMAIL PROTECTED], [EMAIL PROTECTED]
No matter what we think of Linux versus FreeBSD, etc., the one thing I
really like about Linux is that it has Microsoft worried. Anything
that kicks a monopoly in the pants has got to be good for something.
- Chris Johnson
#!/bin/bash
tmp=/tmp/anyUndefined.$$
ldd -r $1 >$tmp 2>&1
echo "----------"
cat $tmp
echo "----------"
if
grep undefined $tmp;
then
exit 1
else
exit 0
fi
