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osmo-ttcn3-hacks
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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
This commit is contained in:
Stefan Sperling 2018-03-31 16:19:40 +02:00 committed by Harald Welte
parent c479e4fa3b
commit 526895e7d4
1 changed files with 18 additions and 0 deletions
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18
regen-makefile.sh
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@ -12,6 +12,16 @@
test -x "$(which ttcn3_makefilegen 2>/dev/null)" || { echo "ERROR: ttcn3_makefilegen not in PATH"; exit 1; }
# Enable ccache if it can be found in path.
# This speeds up repeated builds of the TTCN3 tests by an order of magnitude
# since most of the generated C++ source files don't change very often.
# Roughly, for an initial build which takes N minutes, a complete rebuild
# after 'make clean' will only take N seconds with ccache.
# Note that ccache cannot speed up compilation of .o files to .so files.
if [ -z "$USE_CCACHE" ] && which ccache 2>/dev/null; then
USE_CCACHE=1
fi
ttcn3_makefilegen -p -l -f $*
sed -i -e 's/# TTCN3_DIR = /TTCN3_DIR = \/usr/' Makefile
sed -i -e 's/LDFLAGS = /LDFLAGS = -L \/usr\/lib\/titan /' Makefile
@ -32,3 +42,11 @@ else
sed -i -e 's/TTCN3_DIR = $/TTCN3_DIR = \/usr/' Makefile
fi
sed -i -e 's/\/bin\/compiler/\/bin\/ttcn3_compiler/' Makefile
if [ "x$USE_CCACHE" = "x1" ]; then
# enable ccache
sed -i -e 's/^CXX = g++ $/CXX = env CCACHE_SLOPPINESS=time_macros ccache g++/' Makefile
# Append the -D option to compiler flags. This option disables timestamps
# inside comments in the generated C++ code which interfere with ccache.
sed -i -e 's/^COMPILER_FLAGS = \(.*\)/&-D/' Makefile
fi