Error when cross compiling libndpi package

For Developers
1

I'm a beginner to openwrt and cross compiling,
i'm trying to compile libndpi package with the following steps:
first i put the libndpi Makefile in ~/buildbot/mypackages/network/NETWORK/libndpi/
then i added too feeds.conf
src-link mypackages ~/buildbot/mypackages/network/NETWORK/libndpi/
then i perform

./scripts/feeds update -a
./scripts/feeds install -a -p mypackages
make menuconfig

then go to NETWORK submenu and press y for libndpi
then
make package/libndpi/compile V=99
and i got a long output including this:

ERROR: Missing libpcap(-dev) library required to compile the example application
ERROR: Please install it and try again

and this

cc1: note: someone does not honour COPTS correctly, passed 0 times

here's the Makefile:


#
# Copyright (C) 2018 - ntop.org
#

include $(TOPDIR)/rules.mk

PKG_NAME:=libndpi
PKG_VERSION:=1333.ab2f3ce
PKG_RELEASE:=1

PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=https://github.com/ntop/nDPI.git
PKG_SOURCE_VERSION:=ab2f3cefc89017d73e67faa4eb4011e7e3f2044d
PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
PKG_SOURCE_PROTO:=git

PKG_MAINTAINER:=Emanuele Faranda <faranda@ntop.org>
PKG_LICENSE:=GPL3
PKG_BUILD_DEPENDS:=+libpcap
PKG_BUILD_PARALLEL:=1

# autogen fix
PKG_FIXUP:=autoreconf

include $(INCLUDE_DIR)/package.mk

define Package/libndpi
  SECTION:=network
  CATEGORY:=Network
  #DEPENDS:=+libc +libjson-c +libpthread 
  TITLE:=nDPI Deep Packet Inspection Library
  URL:=https://www.ntop.org
endef

define Package/libndpi/description
 Open and Extensible GPLv3 Deep Packet Inspection Library
endef

CONFIGURE_ARGS += \
        --with-pic \
	--disable-json-c \

define Build/Prepare
	$(call Build/Prepare/Default)
endef

define Build/Configure
	( cd $(PKG_BUILD_DIR); ./autogen.sh )
	$(call Build/Configure/Default)
endef

define Build/InstallDev
	$(INSTALL_DIR) $(STAGING_DIR)/usr/local/include/libndpi
	$(CP) $(PKG_BUILD_DIR)/src/include/* $(STAGING_DIR)/usr/local/include/libndpi
	$(INSTALL_DIR) $(STAGING_DIR)/usr/local/lib
	$(CP) $(PKG_BUILD_DIR)/src/lib/libndpi.* $(STAGING_DIR)/usr/local/lib
endef

$(eval $(call BuildPackage,libndpi))
2

build depends should not have a +

3

Thanks for reply, i removed it and still not working.
i've searched for libpcap and found it in
/home/omarnagah/buildbot/source/staging_dir/target-mipsel_24kc_musl-1.1.16/usr/lib
and
/home/omarnagah/buildbot/source/build_dir/target-mipsel_24kc_musl-1.1.16
and also noticed it was mentioned through compiling before that error several times like this:

mipsel-openwrt-linux-musl-gcc -fPIC -Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -Wall -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -mips16 -minterlink-mips16 -iremap/home/omarnagah/buildbot/source/build_dir/target-mipsel_24kc_musl-1.1.16/libpcap-1.8.1:libpcap-1.8.1 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -ffunction-sections -fdata-sections -I/home/omarnagah/buildbot/source/build_dir/target-mipsel_24kc_musl-1.1.16/linux/include -I.  -DBUILDING_PCAP -D_BSD_SOURCE -DHAVE_CONFIG_H  -D_U_="__attribute__((unused))" -Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -Wall -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -mips16 -minterlink-mips16 -iremap/home/omarnagah/buildbot/source/build_dir/target-mipsel_24kc_musl-1.1.16/libpcap-1.8.1:libpcap-1.8.1 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -ffunction-sections -fdata-sections      -c bpf_filter.c -o bpf_filter_pic.o
mipsel-openwrt-linux-musl-gcc -fPIC -Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -Wall -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -mips16 -minterlink-mips16 -iremap/home/omarnagah/buildbot/source/build_dir/target-mipsel_24kc_musl-1.1.16/libpcap-1.8.1:libpcap-1.8.1 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -ffunction-sections -fdata-sections -I/home/omarnagah/buildbot/source/build_dir/target-mipsel_24kc_musl-1.1.16/linux/include -I.  -DBUILDING_PCAP -D_BSD_SOURCE -DHAVE_CONFIG_H  -D_U_="__attribute__((unused))" -Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -Wall -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -mips16 -minterlink-mips16 -iremap/home/omarnagah/buildbot/source/build_dir/target-mipsel_24kc_musl-1.1.16/libpcap-1.8.1:libpcap-1.8.1 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -ffunction-sections -fdata-sections      -c version.c -o version_pic.o
mipsel-openwrt-linux-musl-gcc -shared -Wl,-soname,libpcap.so.1 -L/home/omarnagah/buildbot/source/staging_dir/target-mipsel_24kc_musl-1.1.16/usr/lib -L/home/omarnagah/buildbot/source/staging_dir/target-mipsel_24kc_musl-1.1.16/lib -L/home/omarnagah/buildbot/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/usr/lib -L/home/omarnagah/buildbot/source/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/lib -znow -zrelro   -o libpcap.so.1 pcap-linux_pic.o fad-getad_pic.o pcap_pic.o inet_pic.o fad-helpers_pic.o gencode_pic.o optimize_pic.o nametoaddr_pic.o etherent_pic.o savefile_pic.o sf-pcap_pic.o sf-pcap-ng_pic.o pcap-common_pic.o bpf_image_pic.o bpf_dump_pic.o  scanner_pic.o grammar_pic.o bpf_filter_pic.o version_pic.o -lc 
ln -s libpcap.so.1 libpcap.so
./config.status --file=pcap-config.tmp:./pcap-config.in
config.status: creating pcap-config.tmp
mv pcap-config.tmp pcap-config
chmod a+x pcap-config

and

config.status: creating pcap-filter.manmisc
config.status: creating pcap-linktype.manmisc
config.status: creating pcap-tstamp.manmisc
config.status: creating pcap-savefile.manfile
config.status: creating pcap.3pcap
config.status: creating pcap_compile.3pcap
config.status: creating pcap_datalink.3pcap
config.status: creating pcap_dump_open.3pcap
config.status: creating pcap_get_tstamp_precision.3pcap
config.status: creating pcap_list_datalinks.3pcap
config.status: creating pcap_list_tstamp_types.3pcap
config.status: creating pcap_open_dead.3pcap
config.status: creating pcap_open_offline.3pcap
config.status: creating pcap_set_tstamp_precision.3pcap
config.status: creating pcap_set_tstamp_type.3pcap

and the ERROR part is here:

configure: WARNING: unrecognized options: --disable-nls
configure: loading site script /home/omarnagah/buildbot/source/include/site/mipsel
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for mipsel-openwrt-linux-strip... mipsel-openwrt-linux-musl-strip
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking build system type... x86_64-pc-linux-gnu
checking host system type... mipsel-openwrt-linux-gnu
checking how to print strings... printf
checking for style of include used by make... GNU
checking for mipsel-openwrt-linux-gcc... mipsel-openwrt-linux-musl-gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... yes
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether mipsel-openwrt-linux-musl-gcc accepts -g... yes
checking for mipsel-openwrt-linux-musl-gcc option to accept ISO C89... none needed
checking whether mipsel-openwrt-linux-musl-gcc understands -c and -o together... yes
checking dependency style of mipsel-openwrt-linux-musl-gcc... none
checking for a sed that does not truncate output... /home/omarnagah/buildbot/source/staging_dir/host/bin/sed
checking for grep that handles long lines and -e... /home/omarnagah/buildbot/source/staging_dir/host/bin/grep
checking for egrep... /home/omarnagah/buildbot/source/staging_dir/host/bin/grep -E
checking for fgrep... /home/omarnagah/buildbot/source/staging_dir/host/bin/grep -F
checking for ld used by mipsel-openwrt-linux-musl-gcc... mipsel-openwrt-linux-musl-ld
checking if the linker (mipsel-openwrt-linux-musl-ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... mipsel-openwrt-linux-musl-gcc-nm
checking the name lister (mipsel-openwrt-linux-musl-gcc-nm) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking how to convert x86_64-pc-linux-gnu file names to mipsel-openwrt-linux-gnu format... func_convert_file_noop
checking how to convert x86_64-pc-linux-gnu file names to toolchain format... func_convert_file_noop
checking for mipsel-openwrt-linux-musl-ld option to reload object files... -r
checking for mipsel-openwrt-linux-objdump... mipsel-openwrt-linux-musl-objdump
checking how to recognize dependent libraries... pass_all
checking for mipsel-openwrt-linux-dlltool... no
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for mipsel-openwrt-linux-ar... mipsel-openwrt-linux-musl-gcc-ar
checking for archiver @FILE support... @
checking for mipsel-openwrt-linux-strip... (cached) mipsel-openwrt-linux-musl-strip
checking for mipsel-openwrt-linux-ranlib... mipsel-openwrt-linux-musl-gcc-ranlib
checking command to parse mipsel-openwrt-linux-musl-gcc-nm output from mipsel-openwrt-linux-musl-gcc object... ok
checking for sysroot... no
checking for mipsel-openwrt-linux-mt... no
checking for mt... mt
configure: WARNING: using cross tools not prefixed with host triplet
checking if mt is a manifest tool... no
checking how to run the C preprocessor... mipsel-openwrt-linux-musl-gcc -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if mipsel-openwrt-linux-musl-gcc supports -fno-rtti -fno-exceptions... no
checking for mipsel-openwrt-linux-musl-gcc option to produce PIC... -fPIC -DPIC
checking if mipsel-openwrt-linux-musl-gcc PIC flag -fPIC -DPIC works... yes
checking if mipsel-openwrt-linux-musl-gcc static flag -static works... yes
checking if mipsel-openwrt-linux-musl-gcc supports -c -o file.o... yes
checking if mipsel-openwrt-linux-musl-gcc supports -c -o file.o... (cached) yes
checking whether the mipsel-openwrt-linux-musl-gcc linker (mipsel-openwrt-linux-musl-ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking for mipsel-openwrt-linux-gcc... (cached) mipsel-openwrt-linux-musl-gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether mipsel-openwrt-linux-musl-gcc accepts -g... (cached) yes
checking for mipsel-openwrt-linux-musl-gcc option to accept ISO C89... (cached) none needed
checking whether mipsel-openwrt-linux-musl-gcc understands -c and -o together... (cached) yes
checking dependency style of mipsel-openwrt-linux-musl-gcc... (cached) none
checking whether mipsel-openwrt-linux-musl-gcc is Clang... no
checking whether pthreads work with -pthread... yes
checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE
checking whether more special flags are required for pthreads... no
checking for PTHREAD_PRIO_INHERIT... yes
checking netinet/in.h usability... yes
checking netinet/in.h presence... yes
checking for netinet/in.h... yes
checking for stdint.h... (cached) yes
checking for stdlib.h... (cached) yes
checking for string.h... (cached) yes
checking for unistd.h... (cached) yes
checking for numa_available in -lnuma... no
checking for pcap_open_live in -lpcap... no

ERROR: Missing libpcap(-dev) library required to compile the example application
ERROR: Please install it and try again