lstdc++ cannot be found by compiling both dynamic and static librarie? - c

Question

Now I cross-compile and link my code with both dynamic and static libraries, but the following error occurs: can't find lstdc + +(make error 1);
If I changed $LD to $CC, another issues occured: can't find -lpaho-mqtt3a(make error 2), what's going on?
change $(LD)
$(TARGET):$(OBJS)
$(LD) -o $(OUTPUT_DIR)/$(TARGET) $(OBJS) $(CFLAGS_OTHERS_LIB)
$(LIB_FOR_SRS) $(LINK_OPTION)
$(STRIP) $(OUTPUT_DIR)/$(TARGET)
to $(CC)
$(TARGET):$(OBJS)
$(CC) -o $(OUTPUT_DIR)/$(TARGET) $(OBJS) $(CFLAGS_OTHERS_LIB)
$(LIB_FOR_SRS) $(LINK_OPTION)
$(STRIP) $(OUTPUT_DIR)/$(TARGET)
I use these dynamic and static libraries to compile links：
paho-mqtt3a.so libjson-c.a libjson-c.la libsqlite3.so libsqlite3.la libsqlite3.a srs_librtmp.a
libssl.a libcrypto.a
Makefile :
COMPILE = aarch64-linux-gnu-
CC = $(COMPILE)gcc
STRIP = $(COMPILE)strip
LD = $(COMPILE)ld
COMPILE_OPTION = -Wall -Wcomment -Wformat -Wmissing-braces -Wswitch -Wuninitialized
\
-Wbad-function-cast -Waggregate-return -Wmultichar -Wsign-compare -
Wshadow
#COMPILE_OPTION_DEBUG = -gdwarf-2 -g
COMPILE_ALL_OPTION += $(COMPILE_OPTION) $(COMPILE_OPTION_DEBUG)
LINK_OPTION = -lpaho-mqtt3a -ljson-c -lsqlite3 -lm -lc -lpthread -ldl -lstdc++ -static
LIB_FOR_JSON = ./lib/json_lib/*
LIB_FOR_MQTT = ./lib/mqtt_lib/*
LIB_FOR_SQLITE3 = ./lib/sqlite3_lib/*
LIB_FOR_SRS = ./lib/srslibrtmp_lib/*
SRC_DIR = ./src
OUTPUT_DIR = ./output
SYS_LOCAL_LIB_DIR = /usr/local/lib
OBJS_MAIN = main.o
OBJS_EC_UART_232 = ec_uart_232.o
OBJS_EC_UART_485 = ec_uart_485.o
OBJS_EC_MANAGE_PLCE = ec_manage_plce.o
OBJS_EC_SOCKET_VIDEO = ec_socket_video.o
OBJS_EC_MQTT_ANDROID = ec_mqtt_android.o
OBJS_EC_SQLITE = ec_sqlite.o
OBJS_EC_STORE_INFO = ec_store_info.o
OBJS_EC_MANAGE_CAMERA = ec_manage_camera.o
OBJS_DEAL_REQUEST_LOOP = deal_request_loop.o
OBJS_PUSH_VIDEO = push_video.o
TARGET = ecSmartFire
RM = rm -rf
MV = mv
CP = cp -r
LDCONFIG = ldconfig
OBJS = $(OBJS_MAIN) $(OBJS_EC_UART_232) $(OBJS_EC_UART_485) $(OBJS_EC_MANAGE_PLCE)
$(OBJS_EC_SOCKET_VIDEO) \
$(OBJS_EC_MQTT_ANDROID) $(OBJS_EC_SQLITE) $(OBJS_EC_STORE_INFO) $(OBJS_EC_MANAGE_CAMERA)
$(OBJS_DEAL_REQUEST_LOOP) \
$(OBJS_PUSH_VIDEO)
$(TARGET):$(OBJS)
$(LD) -o $(OUTPUT_DIR)/$(TARGET) $(OBJS) $(CFLAGS_OTHERS_LIB) $(LIB_FOR_SRS) $(LINK_OPTION)
$(STRIP) $(OUTPUT_DIR)/$(TARGET)
$(OBJS_MAIN):
$(CC) -c $(SRC_DIR)/main.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_UART_232):
$(CC) -c $(SRC_DIR)/ec_uart_232.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_UART_485):
$(CC) -c $(SRC_DIR)/ec_uart_485.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_MANAGE_PLCE):
$(CC) -c $(SRC_DIR)/ec_manage_plce.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_SOCKET_VIDEO):
$(CC) -c $(SRC_DIR)/ec_socket_video.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_MQTT_ANDROID):
$(CC) -c $(SRC_DIR)/ec_mqtt_android.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_SQLITE):
$(CC) -c $(SRC_DIR)/ec_sqlite.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_STORE_INFO):
$(CC) -c $(SRC_DIR)/ec_store_info.c $(COMPILE_ALL_OPTION)
$(OBJS_EC_MANAGE_CAMERA):
$(CC) -c $(SRC_DIR)/ec_manage_camera.c $(COMPILE_ALL_OPTION)
$(OBJS_DEAL_REQUEST_LOOP):
$(CC) -c $(SRC_DIR)/deal_request_loop.c $(COMPILE_ALL_OPTION)
$(OBJS_PUSH_VIDEO):
$(CC) -c $(SRC_DIR)/push_video.c $(COMPILE_ALL_OPTION)
.PHONY:clean copylib
clean:
-$(RM) $(OUTPUT_DIR)/* $(OBJS)
copylib:
$(CP) $(LIB_FOR_MQTT) $(SYS_LOCAL_LIB_DIR)/
$(CP) $(LIB_FOR_JSON) $(SYS_LOCAL_LIB_DIR)/
$(CP) $(LIB_FOR_SQLITE3) $(SYS_LOCAL_LIB_DIR)/
$(LDCONFIG)
make error 1:
...
no errors
...
aarch64-linux-gnu-gcc -c ./src/ec_store_info.c -Wall -Wcomment -Wformat -Wmissing-braces -
Wswitch -Wuninitialized -Wbad-function-cast -Waggregate-return -Wmultichar -Wsign-compare -
Wshadow
aarch64-linux-gnu-gcc -c ./src/ec_manage_camera.c -Wall -Wcomment -Wformat -Wmissing-braces -
Wswitch -Wuninitialized -Wbad-function-cast -Waggregate-return -Wmultichar -Wsign-compare -
Wshadow
aarch64-linux-gnu-gcc -c ./src/deal_request_loop.c -Wall -Wcomment -Wformat -Wmissing-braces -
Wswitch -Wuninitialized -Wbad-function-cast -Waggregate-return -Wmultichar -Wsign-compare -
Wshadow
aarch64-linux-gnu-gcc -c ./src/push_video.c -Wall -Wcomment -Wformat -Wmissing-braces -Wswitch
-Wuninitialized -Wbad-function-cast -Waggregate-return -Wmultichar -Wsign-compare -Wshadow
./src/push_video.c: In function 'PushVideoToServer':
./src/push_video.c:21:43: warning: pointer targets in passing argument 2 of
'srs_h264_write_raw_frames' differ in signedness [-Wpointer-sign]
ret = srs_h264_write_raw_frames(Rtmp, data, dataSize, DTS, PTS);
^~~~
In file included from ./src/push_video.c:2:
./src/../head/srs_librtmp/srs_librtmp.h:465:12: note: expected 'char *' but argument is of type
'unsigned char *'
extern int srs_h264_write_raw_frames(srs_rtmp_t rtmp, char* frames, int frames_size, uint32_t
dts, uint32_t pts);
^~~~~~~~~~~~~~~~~~~~~~~~~
./src/push_video.c: In function 'PushVideoFunction':
./src/push_video.c:86:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
aarch64-linux-gnu-ld -o ./output/ecSmartFire main.o ec_uart_232.o ec_uart_485.o ec_manage_plce.o
ec_socket_video.o ec_mqtt_android.o ec_sqlite.o ec_store_info.o ec_manage_camera.o
deal_request_loop.o push_video.o ./lib/srslibrtmp_lib/* -lpaho-mqtt3a -ljson-c -lsqlite3 -lm
-lc -lpthread -ldl -lstdc++ -static
aarch64-linux-gnu-ld: cannot find -lstdc++
make: *** [Makefile:51: ecSmartFire] Error 1
make error 2:
...
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-
gnu/bin/ld: cannot find -lpaho-mqtt3a
/usr/lib/gcc-cross/aarch64-linux-gnu/8/../../../../aarch64-linux-
gnu/bin/ld: ./lib/srslibrtmp_lib/srs_librtmp.a(srs_lib_simple_socket.o):
in function `srs_hijack_io_connect(void*, char const*, int)':

Answer 1

solved it.
1,as MadScientist said, I always use gcc to compile not ld.
2,I use option -Wl,-Bstatic and -Wl,-Bdynamic to separte static library and dynamic library.
$(TARGET):$(OBJS)
$(CC) -L $(LIB_FOR_SRS) -o $(OUTPUT_DIR)/$(TARGET) $(OBJS) -Wl,-Bstatic -lssl -
lcrypto \
-Wl,-Bdynamic $(DYNAMIC_LINK_OPTION) $(STATIC_LINK_OPTION)
$(STRIP) $(OUTPUT_DIR)/$(TARGET)