Allow easy cross-compiling #21
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When cross-compiling we need to specify a compiler different from "gcc". So let's make possible to override CC while calling make like: ``` CC=arm-linux-gcc make ``` Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
When cross-compiling we need to specify a pkg-config different from host pkg-config. So let's make possible to override CC while calling make like: ``` PKG_CONFIG=/path/path/pkg-config make ``` Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
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Allow to override CC and PKG_CONFIG