tree f789439ad1b7543f402545b1a59be735011d885c
parent c479e4fa3bdd2a31693b6a84bf72992d25d6f37f
author Stefan Sperling <ssperling@sysmocom.de> 1522505980 +0200
committer Harald Welte <laforge@gnumonks.org> 1523033926 +0000

support ccache to speed up ttcn3 test compilation

By default, if ccache is found in PATH when regen-makefile.sh runs,
use cached compiled C++ object files during the build (or populate
the cache in case an object is not cached yet). Objects are cached
in ccache's default cache directory (~/.ccache) unless overriden by
the CCACHE_DIR environment variable.

The USE_CCACHE environment variable overrides auto-detection
in regen-makefile.sh and disables (USE_CCACHE=0) or enables
(USE_CCACHE=1) use of ccache.

Rebuilding the test suite from scratch with a populated cache
is an order of magnitude faster than doing an initial build.
ccache only speeds up C++ (.cc) to object file (.o) compilation.
Linking object (.o) files into shared object (.so) files is still
performed by the real compiler during every build.

Change-Id: Ibb538f602206535c06980f88191c1dabe3c4cd82