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I have this small piece of code which uses `libpacp` library:

ifacelookup.c

 #include <stdio.h>
    #include <pcap.h>

    int main(int argc, char *argv[])
    {
        char *dev, errbuf[PCAP_ERRBUF_SIZE];

        dev = pcap_lookupdev(errbuf);
        if (dev == NULL) {
            fprintf(stderr, "Couldn't find default device: %s\n", errbuf);
            return(2);
        }
        printf("Device: %s\n", dev);
        return(0);
    }

makefile for this is:

 LIBS=-lpcap 
    ifacelookup: ifacelookup.o
        $(CC) opensniff.o -o ifacelookup $(LDFLAGS) $(LIBS)
    ifacelookupf.o: ifacelookup.c
        $(CC) $(CFLAGS) -c ifacelookup.c
    clean:
        rm *.o ifacelookup

I compiled it on OpenWrt SDK and build a `.ipk` package successfully. Makefile for it is

 include $(TOPDIR)/rules.mk

    PKG_NAME:=ifacelookup
    PKG_VERSION:=1.0.1
    PKG_MAINTAINER:=MDK 
    PKG_LICENSE:=GPL-2
    PKG_BUILD_DEPENDS:=libpcap
    
    include $(INCLUDE_DIR)/package.mk
    include $(INCLUDE_DIR)/kernel.mk
    
    PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
   
    define Package/ifacelookup
        SECTION:=utils
        CATEGORY:=Utilities
        DEPENDS:=+libpcap
        TITLE:=Test raditap header fields.
    endef
    
    define Package/$(PKG_NAME)/description
        Test the network card for the radiotap fields it supports.
    endef
    
    define Build/Prepare
        mkdir -p $(PKG_BUILD_DIR)
        $(CP) ./src/* $(PKG_BUILD_DIR)/
    endef
    
    define Build/Configure
    endef
    
    define Build/Compile
        $(MAKE) -C $(PKG_BUILD_DIR) $(TARGET_CONFIGURE_OPTS)
    endef
    
    define Package/$(PKG_NAME)/install
        $(INSTALL_DIR) $(1)/bin
        $(INSTALL_BIN) $(PKG_BUILD_DIR)/$(PKG_NAME) $(1)/bin
    endef
    
    $(eval $(call BuildPackage,$(PKG_NAME)))

When tried to install this package on OpenWrt device using

     opkg install /tmp/ifacelookup_1.0.1_ar71xx.ipk

I got this error message:

    Installing ifacelookup (1.0.1) to root...
    Collected errors:
     * satisfy_dependencies_for: Cannot satisfy the following dependencies for ifacelookup:
     *     libpcap * 
     * opkg_install_cmd: Cannot install package ifacelookup.

What gone wrong?

(Last edited by haccks on 8 Jun 2017, 16:49)