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5f35ec35
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2012-05-03T13:27:56
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m4: provide additional pkg-config macros
The macros provide a succint way to run a pkg-config check over modules
depending on a --with-name configure option.
There is a flexible variant to have custom behaviour if the package is
found or not and two more limited ones that just set HAVE_NAME make and
preprocessor variables.
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