[vbox-dev] Package glib-2.0 was not found in the pkg-config search path

[John Lumby]

Building 6.1.38 on a linux system running kernel 5.9.16 and glibc-2.35,
and with glib-2.0 2.58.3 installed and working,
and with 

PKG_CONFIG_PATH=/opt/openssl/lib/pkgconfig:/usr/local/xorg-git-current/xorg-build/lib/pkgconfig:/usr/local/xorg-git-current/xorg-build/share/pkgconfig:/usr/local/lib/pkgconfig:/usr/lib/x86_64-linux-gnu/pkgconfig:/usr/share/pkgconfig:/usr/lib/pkgconfig

and glib-2.0 pkg conf file here
-rw-r--r-- 1 root root 425 Nov  6  2019 /usr/lib/x86_64-linux-gnu/pkgconfig/glib-2.0.pc

and pkg-config reporting

pkg-config --modversion glib-2.0
2.58.3


the kmk command spits this out :


build debug: VBOX_WITH_NO_GCC_WARNING_POLICY is enabled
Package glib-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `glib-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'glib-2.0' found

Any idea why it is doing this?     I could not find where in the build jungle it is checking this.    But I do note that the config.log from configure does not mention glib at all.    Why is kmk doing this instead of configure?    All very strange.

I eventually figured out a very horrible way of forcing the build to go through using the CFLAGS and LIBS from the /usr/lib/x86_64-linux-gnu/pkgconfig/glib-2.0.pc,  i.e. using the run-time  glib-2.0 2.58.3  ,   and  --  it works just fine.     So the problem is not with the installed glib-2.0.

Cheers,    John Lumby