＃包括<botan botan.h> Yocto 编译中没有这样的文件或目录</botan>

Question

HI i have include botan_2.14.0.bb from http://cgit.openembedded.org/meta-openembedded/tree/meta-oe/recipes-crypto/botan/botan_2.14.0.bb?h=master and i have bitbake it into my yocto build. below is the rpm outcome:

-rw-r--r-- 2 kjlau kjlau   155436 Jul   7 11:12 libbotan-2-bin-2.14.0-r0.cortexa8hf_neon.rpm
-rw-r--r-- 2 kjlau kjlau   246916 Jul   7 11:12 libbotan-2-doc-2.14.0-r0.cortexa8hf_neon.rpm
-rw-r--r-- 2 kjlau kjlau    16376 Jul   7 11:12 libbotan-2-python3-2.14.0-r0.cortexa8hf_neon.rpm
-rw-r--r-- 2 kjlau kjlau   255764 Jul   7 11:12 libbotan-2-dev-2.14.0-r0.cortexa8hf_neon.rpm
-rw-r--r-- 2 kjlau kjlau  1443276 Jul   7 11:12 libbotan-2-13-2.14.0-r0.cortexa8hf_neon.rpm
-rw-r--r-- 2 kjlau kjlau 19660652 Jul   7 11:13 libbotan-2-dbg-2.14.0-r0.cortexa8hf_neon.rpm

i try build a application with include the botan header #include <botan/botan.h>, i am getting error no such file or directory. Below is botanapp.bb contents

DECRIPTION = "Simple helloworld application"
LICENSE = "CLOSED"
DEPENDS = "botan"
PACKAGES = "${PN} ${PN}-dbg"
SRC_URI = "file://app.cpp"

S = "${WORKDIR}"
CXXFLAGS = "-g -std=gnu++11"
inherit pkgconfig autotools

do_compile() {
    
     ${CXX} ${CXXFLAGS} ${LDFLAGS} -I ${includedir}/botan-2/botan   ${S}/app.cpp -lbotan-2  -o ${S}/myBotan
}

do_install() {
    install -d ${D}${bindir}
    install -m 0755  ${WORKDIR}/myBotan ${D}${bindir}
}

FILES_${PN} += " \
        ${bindir}/myBotan \
"

i have check my botanapp recipe-sysroot of botanapp

$build/tmp/work/cortexa8hf-neon-poky-linux-gnueabi/botanapp/1.0-r0/recipe-sysroot/usr/include/botan-2/botan
$ ls botan*
    botan.h

The header is available, i am not sure what wrong.To my knowledge, i need do something like this

g++ app.cpp -I/usr/local/include/botan-2 -lbotan-2

to compile botan code in ubuntu. Kindly let me know if i do anything wrong.

Answer 1

What you needed is STAGING_INCDIR . The ${includedir} is where the files will be at the image. And so on the target.

But with DEPENDS, you ask Yocto to prepare a sysroot with everything there to build the recipe. And STAGING_INCDIR is pointing to that sysroot.

A includedir can be used eg to tell the install command where to put the files in the image.

It's rather easy to find out how all others recipes are doing it. A grep -r ' -I' in you sources will point to many recipes where a compiler command is used.

Answer 2

do_compile() {
     ${CXX} ${CXXFLAGS} ${LDFLAGS}  -o ${S}/botanBinary -I ${STAGING_DIR_TARGET}/${includedir}/botan-2 ${S}/app.cpp  -lbotan-2 
}

This work for me, let me know if anything does not make sense. thanks