[yocto] pkg-config not found

[Ross Burton]

On 12/11/2019 21:06, Mark Hawthorne wrote:
> I have an autotools build that uses the following autoconfig file:
> --------------------
> AC_INIT([my-program], [1])
> AM_INIT_AUTOMAKE([-Wall -Werror foreign])
> AC_LANG(C++)
> AC_PROG_CXX
> AX_PTHREAD()
> PKG_CHECK_MODULES(LIBPNG, libpng >= 1.6.34)
> PKG_CHECK_MODULES(FREETYPE2, freetype2 >= 21.0.15)
> PKG_CHECK_MODULES(EGL, egl > 0)
> PKG_CHECK_MODULES(GLES2, glesv2 > 0)
> PKG_CHECK_MODULES(GLM, glm >= 0.9.9)
> PKG_CHECK_MODULES(SPATIALITE, spatialite >= 4.3.0)
> AC_CONFIG_FILES([Makefile])
> AC_OUTPUT
> --------------------
> 
> I have made the following bitbake recipe file
> 
> --------------------
> SUMMARY = "my program"
> HOMEPAGE = ""
> DESCRIPTION = ""
> LICENSE = "MIT"
> LIC_FILES_CHKSUM = 
> "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
> 
> SRC_URI = "git://user@bitbucket.org/user/myrepo.git 
> <http://user@bitbucket.org/user/myrepo.git>"
> 
> SRCREV = "dc1391dbc82702fd0126d4156d4ab59571427efe"
> 
> DEPENDS_${PN} = "libpng freetype glm libegl libgles2 libspatialite"
> 
> S = "${WORKDIR}/git"
> 
> inherit pkgconfig autotools
> --------------------
> 
> The build fails with this error:
> --------------------
> configure: error: in 
> `/home/user/Documents/tisdk/build/arago-tmp-external-arm-toolchain/work/armv7at2hf-neon-linux-gnueabi/my-program/1.0-r0/build':
> configure: error: The pkg-config script could not be found or is too 
> old.  Make sure it is in your PATH or set the PKG_CONFIG environment 
> variable to the full path to pkg-config.
> 
> Alternatively, you may set the environment variables LIBPNG_CFLAGS and 
> LIBPNG_LIBS to avoid the need to call pkg-config.
> --------------------

That *should* work.  The config.log in the build directory might have 
more useful information.

Ross