ntpclient on Trident pnx84xx

0. Prepare trident build environment
# cd /PATH/TO/TRIDENT/SRC
# source pnx8400_MP_env.sh


1. Download latest ntpclient source codes from official website.



# wget http://doolittle.icarus.com/ntpclient/ntpclient_2010_365.tar.gz

# tar -zxvf ntpclient_2010_365.tar.gz

# cd ntpclient-2010

2. Modify the Makefile for Trident pnx84xx.

# vi Makefile

# A long time ago, far, far away, under Solaris, you needed to

#    CFLAGS += -xO2 -Xc

#    LDLIBS += -lnsl -lsocket

# To cross-compile

CC = arm-linux-gcc

CFLAGS += --sysroot=$(_TMSYSROOT)

LDFLAGS+= --sysroot=$(_TMSYSROOT)

# To check for lint

#    CFLAGS += -Wpointer-arith -Wcast-align -Wcast-qual -Wshadow -Wundef \

#     -Waggregate-return -Wnested-externs -Winline -Wwrite-strings -Wstrict-prototypes

# This is old-school networking code, making the traditional cast between

# struct sockaddr* and struct sockaddr_in*.  Thus a modern gcc needs:

CFLAGS += -fno-strict-aliasing

CFLAGS += -std=c89

CFLAGS += -W -Wall

CFLAGS += -O2

# CFLAGS += -DPRECISION_SIOCGSTAMP

CFLAGS += -DENABLE_DEBUG

CFLAGS += -DENABLE_REPLAY

# CFLAGS += -DUSE_OBSOLETE_GETTIMEOFDAY

LDFLAGS += -lrt

all: ntpclient

test: ntpclient

        ./ntpclient -d -r <test.dat

ntpclient: ntpclient.o phaselock.o

ntpclient.o phaselock.o: ntpclient.h

adjtimex: adjtimex.o

clean:

        rm -f ntpclient adjtimex *.o

# make

arm-linux-gcc --sysroot=/usr/local/apollo/SRC/open_source_archive/linux/toolchains/gnu_cortex-a9_tools -fno-strict-aliasing -std=c89 -W -Wall -O2 -DENABLE_DEBUG -DENABLE_REPLAY   -c -o ntpclient.o ntpclient.c

arm-linux-gcc --sysroot=/usr/local/apollo/SRC/open_source_archive/linux/toolchains/gnu_cortex-a9_tools -fno-strict-aliasing -std=c89 -W -Wall -O2 -DENABLE_DEBUG -DENABLE_REPLAY   -c -o phaselock.o phaselock.c

arm-linux-gcc --sysroot=/usr/local/apollo/SRC/open_source_archive/linux/toolchains/gnu_cortex-a9_tools -lrt  ntpclient.o phaselock.o   -o ntpclient

/usr/local/apollo/SRC/open_source_archive/linux/toolchains/gnu_cortex-a9_tools/lib/libpthread.so.0: warning: the use of `mktemp' is dangerous, better use `mkstemp'

# file ntpclient

ntpclient: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped

DONE !

PS.

In case you have to use some earlier version, you may have below issue.

ntpclient.o: In function `set_freq':

ntpclient.c:(.text+0x18): undefined reference to `__adjtimex'

ntpclient.o: In function `main':

ntpclient.c:(.text+0xc58): undefined reference to `__adjtimex'

collect2: ld returned 1 exit status

make: *** [ntpclient] Error 1

Try to replace __adjtimex by adjtimex in ntpclient.c

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REF: http://blog.sina.com.cn/s/blog_602f87700100nyda.html