linux 创建动态库

参考 http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html

gcc -fPIC -g -c -Wall a.c
gcc -fPIC -g -c -Wall b.c
gcc -shared -Wl,-soname,libmystuff.so.1 \
    -o libmystuff.so.1.0.1 a.o b.o –lc

makefile

CC            = gcc
CXX           = g++
DEFINES       = -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED
CFLAGS        = -pipe -O2 -Wall -W -D_REENTRANT -fPIC $(DEFINES)
CXXFLAGS      = -pipe -O2 -Wall -W -D_REENTRANT -fPIC $(DEFINES)
INCPATH       = -I../../../../x86/mkspecs/qws/linux-x86-g++ -I. -I../../../../x86/include/QtCore -I../../../../x86/include/QtNetwork
-I../../../../x86/include/QtGui -I../../../../x86/include -I. -I.
LINK          = g++
LFLAGS        = -Wl,-O1 -Wl,-rpath,/opt/qt-everywhere/x86/lib -shared -Wl,-soname,libclient.so.1
LIBS          = $(SUBLIBS)  -L/opt/qt-everywhere/x86/lib -lQtGui -L/opt/qt-everywhere/x86/lib -lQtNetwork -lQtCore –lpthread

####### Implicit rules

.SUFFIXES: .o .c .cpp .cc .cxx .C

.cpp.o:
    $(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.cc.o:
    $(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.cxx.o:
    $(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.C.o:
    $(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"

.c.o:
    $(CC) -c $(CFLAGS) $(INCPATH) -o "$@" "$<"

$(TARGET):  $(OBJECTS)

    -$(DEL_FILE) $(TARGET)

    $(LINK) $(LFLAGS) -o $(TARGET) $(OBJECTS) $(LIBS) $(OBJCOMP)