PATCH: Detect missing pkg.m4

[John Darrington]

configure.ac depends on pkg-config 

I try to avoid pkg-config if at all possible.  It is a source of constant 
aggrevation.

However, if it is absolutely unavoidable I recommend the attached patch.  It 
detects
pkg-config problems early in the bootstrap process, rather than delaying their 
discovery
till halfway through the build.

J'

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0001-configure.ac-Added-macros-to-help-detect-missing-pkg.patch
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