FLAG is added to the front of the FLAGS-VARIABLE shell variable, with a space added in between.
If FLAGS-VARIABLE is not specified, the current language’s flags (e.g. CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly FLAG.
NOTE: Implementation based on AX_APPEND_FLAG.
Download the latest version of ax_prepend_flag.m4 or browse the macro’s revision history.
Copyright © 2008 Guido U. Draheim firstname.lastname@example.org
Copyright © 2011 Maarten Bosmans email@example.com
Copyright © 2018 John Zaitseff J.Zaitseff@zap.org.au
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