[bitbake-devel] need help to write a recipe to link a static library to my application

[Viditha Murahari]

Hello Khem Raj,

I did a bitbake -e -c compile -f rttapp  , and this is how my  do_c0mpile
command looks

do_compile() {
        arm-poky-linux-gnueabi-gcc  -march=armv7ve -mfpu=neon
 -mfloat-abi=hard -mcpu=cortex-a7
--sysroot=/home/jeesu/viditha/imx6ul-evk-audio/build/tmp/sysroots/imx6ulevk
 -I/home/jeesu/viditha/imx6ul-evk-audio/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/rttapp/1.0-r1/include
-DPJ_AUTOCONF=1 -DPJ_IS_BIG_ENDIAN=0 -DPJ_IS_LITTLE_ENDIAN=1 -O2 -pipe -g
-feliminate-unused-debug-types
-fdebug-prefix-map=/home/jeesu/viditha/imx6ul-evk-audio/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/rttapp/1.0-r1=/usr/src/debug/rttapp/1.0-r1
-fdebug-prefix-map=/home/jeesu/viditha/imx6ul-evk-audio/build/tmp/sysroots/x86_64-linux=
-fdebug-prefix-map=/home/jeesu/viditha/imx6ul-evk-audio/build/tmp/sysroots/imx6ulevk=
 -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed
-L/home/jeesu/viditha/imx6ul-evk-audio/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/rttapp/1.0-r1/lib
-lpjsua2-arm-poky-linux-gnueabi -lstdc++ -lpjsua-arm-poky-linux-gnueabi -lm
-lrt -lpthread -lasound rttapp.c -o rttapp
}

and i tried

ls
/home/jeesu/viditha/imx6ul-evk-audio/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/rttapp/1.0-r1/lib

jeesu at MPCLinux:~/viditha/imx6ul-evk-audio/build/tmp/work/cortexa7hf-neon-poky-linux-gnueabi/rttapp/1.0-r1/lib$
ls

libg7221codec-arm-poky-linux-gnueabi.a
libgsmcodec-arm-poky-linux-gnueabi.a
libilbccodec-arm-poky-linux-gnueabi.a
libpj-arm-poky-linux-gnueabi.a
libpjlib-util-arm-poky-linux-gnueabi.a
libpjmedia-arm-poky-linux-gnueabi.a
libpjmedia-audiodev-arm-poky-linux-gnueabi.a
libpjmedia-codec-arm-poky-linux-gnueabi.a
libpjmedia-videodev-arm-poky-linux-gnueabi.a
libpjnath-arm-poky-linux-gnueabi.a
libpjsip-arm-poky-linux-gnueabi.a
libpjsip-simple-arm-poky-linux-gnueabi.a
libpjsip-ua-arm-poky-linux-gnueabi.a
libpjsua2-arm-poky-linux-gnueabi.a
libpjsua-arm-poky-linux-gnueabi.a
libresample-arm-poky-linux-gnueabi.a
libspeex-arm-poky-linux-gnueabi.a
libsrtp-arm-poky-linux-gnueabi.a
pkgconfig

It looks like -L in my compile command is pointing to the right location
for my libraries. So im not clear what im missing. Please help.





On Fri, Jul 21, 2017 at 7:25 PM, Khem Raj <raj.khem at gmail.com> wrote:

>
> On Fri, Jul 21, 2017 at 6:43 PM Andre McCurdy <armccurdy at gmail.com> wrote:
>
>> On Fri, Jul 21, 2017 at 12:11 PM, Viditha Murahari
>> <viditha at mpconsultants.org> wrote:
>> > I'm new to yocto and bitbake and I'm building a voip application for a
>> > custom imx6 board. I want to use  pjsip libraries to build my
>> application, I
>> > have compiled pjsip in my yocto build and generated pjsip libraries (
>> all
>> > pjsip libraries r static). I'm having issues building a recipe for my
>> > application that calls the pjsip functions. Below is how my recipe looks
>> >
>> >
>> > Filename: rttapp.bb
>> >
>> > DESCRIPTION = "Simple voip application"
>> > SECTION = "examples"
>> > LICENSE = "MIT"
>> > LIC_FILES_CHKSUM
>> > ="file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f3
>> 02"
>> > PR = "r1"
>> >
>> > SRC_URI += "file://rttapp.c"
>> > SRC_URI += "file://include"
>> > SRC_URI += "file://lib"
>> >
>> > S = "${WORKDIR}"
>> >
>> > CFLAGS_prepend += "-I${WORKDIR}/include -DPJ_AUTOCONF=1
>> -DPJ_IS_BIG_ENDIAN=0
>> > -DPJ_IS_LITTLE_ENDIAN=1"
>> > LDFLAGS_append += "-L${WORKDIR}/lib -lpjsua2-arm-poky-linux-gnueabi
>> -lstdc++
>> > -lpjsua-arm-poky-linux-gnueabi -lm -lrt -lpthread -lasound"
>> >
>> > do_compile() {
>> > ${CC} ${CFLAGS} ${LDFLAGS} rttapp.c -o rttapp
>>
>> Try splitting this into two commands. First compile rttapp.c to
>> rttapp.o and then link the final application as a second step. When
>> linking the application, ensure that rttapp.o is listed on the command
>> line before the libraries which provide the symbols it requires.
>>
>> > }
>> >
>> >
>> > When i do bitbake rttapp, the error i see is as below
>> >
>> >
>> > Log data follows:
>> > DEBUG: Executing shell function do_compile
>> > /tmp/cc6nn4Dp.o: In function `main':
>> > /usr/src/debug/rttapp/1.0-r1/rttapp.c:159: undefined reference to
>> > `pjsua_create'
>> > collect2: error: ld returned 1 exit status
>> > WARNING: exit code 1 from a shell command.
>> >
>> >
>> > Please advise
>
>
> You are not having the said libraries in your workdir ensure that either
> you have them via fetcher or via depends
>
>>
>> >
>> > --
>> > _______________________________________________
>> > bitbake-devel mailing list
>> > bitbake-devel at lists.openembedded.org
>> > http://lists.openembedded.org/mailman/listinfo/bitbake-devel
>> >
>> --
>> _______________________________________________
>> bitbake-devel mailing list
>> bitbake-devel at lists.openembedded.org
>> http://lists.openembedded.org/mailman/listinfo/bitbake-devel
>>
>
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