How to get gps.h into a Yocto recipe build? - gcc

Question

I've built a simple recipe which works as long as I don't need gps.h:
recipes/foo (dunfell) $ cat foo_3.0.0.bb
DESCRIPTION = "FOO Daemon"
LICENSE = "CLOSED"
SRC_URI = " file://*.* \
"
S = "${WORKDIR}"
INSANE_SKIP_${PN} = "ldflags"
INHIBIT_PACKAGE_DEBUG_SPLIT = "1"
INHIBIT_PACKAGE_STRIP = "1"
do_compile() {
cd ${S}/src
make
cp foo ~/
cd -
}
do_install() {
install -d ${D}${bindir}
install -m 0755 foo ${D}${bindir}
}
gps.h is in /usr/include on my local machine, but as Yocto is cross-compiling it provides a reasonable explanation of why it can't use the local /usr/include/gps.h:
cc1: error: include location "/usr/include" is unsafe for cross-compilation [-Werror=poison-system-directories]
foo.c:54:10: fatal error: gps.h: No such file or directory
54 | #include <gps.h>
| ^~~~~~~
cc1: all warnings being treated as errors
I've tried IMAGE_INSTALL_append " libgps-dev" and " gps-lib-dev" in my layer.conf but neither of those work.
How can I get the gps.h header into my Yocto project/recipe at build time?

Answer 1

Let me copy your recipe and add some comments first:
DESCRIPTION = "FOO Daemon"
LICENSE = "CLOSED"
# --- COMMENT ---
# It is not recommended to use "*" with SRC_URI,
# as Yocto will not keep track of your files if you edit them
# so it will never rebuild automaticall after a change
# Best practice is to sepecify the local files like:
# SRC_URI = "file://src"
# This will make bitbake unpacks the "src" folder into ${WORKDIR}
# --- COMMENT ---
SRC_URI = " file://*.* \
"
# --- COMMENT ---
# The ${S} variable is the defautl workind directory for compilation tasks,
# do_configure, do_compile, ...,
# So, if you have "src" folder that will be unpacked into ${WORKDIR}
# you need to set S to that:
# S = "${WORKDIR}/src"
# --- COMMENT ---
S = "${WORKDIR}"
INSANE_SKIP_${PN} = "ldflags"
INHIBIT_PACKAGE_DEBUG_SPLIT = "1"
INHIBIT_PACKAGE_STRIP = "1"
# --- COMMENT ---
# If your project has a "Makefile" you can use the "autotools" class
# it runs oe_runmake automatically
# inherit autotools
# If you want to copy the output to your home directory you can do it in "do_install"
# If you use autotools you do not need do_compile
# --- COMMENT ---
do_compile() {
cd ${S}/src
make
cp foo ~/
cd -
}
do_install() {
install -d ${D}${bindir}
install -m 0755 foo ${D}${bindir}
}
# --- COMMENT ---
# Do not forget to specify your output files into FILES for do_package to work well
# FILES_${PN} = "${bindir}/foo"
# --- COMMENT ---
Now, after dealing with that, if your recipe requires something at build-time, than the dependency needs to exist in the same recipe's workding directory, because if you are adding libgps into IMAGE_INSTALL it will be present in the rootfs but not during your build time.
So, to do that, you need to specify the dependencies recipe with DEPENDS.
I have looked for gps.h and I found it packages with gpsd recipe.
So, try:
DEPENDS += "gpsd"
So, the final recipe would look like the following:
DESCRIPTION = "FOO Daemon"
LICENSE = "CLOSED"
SRC_URI = "file://src"
S = "${WORKDIR}/src"
DEPENDS += "gpsd"
inherit autotools
do_install(){
install -d ${D}${bindir}
install -m 0755 foo ${D}${bindir}
cp foo ~/
}
FILES_${PN} = "${bindir}/foo"
The only thing left is to test.