commit a74e44f6ef7db43d38eb600fbfee152b31b30514
author Lukasz Kazmierczak <lukasz.kazmierczak@intel.com> Fri Jul 23 15:02:20 2021 +0200
committer Szymon Dompke <szymon.dompke@intel.com> Wed Aug 04 14:52:46 2021 +0000
tree 103c33cc2cfa03c698d7462a779680166bdada9f
parent 3a617023eacf8a7fcc49e15d5767b35f47c7c089

Extending meson build system to support fast compilation during development stage

Tested compilation against 3 build configurations
- with lto for src and tests/src (for release sw):
  all: ~3 min; change in cpp file: ~2 min
- with lto for src and no_lto for tests/src (for release sw):
  all: ~2 min; change in cpp file:~ 40 sec
- after using scripts/configure_fast_compilation.sh (for development only):
  all: ~1.75 min; change in cpp file: ~20 sec

Signed-off-by: Lukasz Kazmierczak <lukasz.kazmierczak@intel.com>
Change-Id: Idf435d8455260d2d988cb7286d71401f21fd03e2

meson.build

diff --git a/meson.build b/meson.build
index 0e36ac6..622043c 100644
--- a/meson.build
+++ b/meson.build
@@ -15,6 +15,9 @@
     license: 'Apache-2.0',
 )
 
+summary({'Fast build with link-time optimizer disabled':
+            not get_option('b_lto')}, section: 'General')
+
 cpp = meson.get_compiler('cpp')
 add_project_arguments(
     cpp.get_supported_arguments([

scripts/configure_fast_compilation.sh

diff --git a/scripts/configure_fast_compilation.sh b/scripts/configure_fast_compilation.sh
new file mode 100755
index 0000000..b737615
--- /dev/null
+++ b/scripts/configure_fast_compilation.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+PARAMNAME=b_lto
+PARAMVAL=false
+FLAGTOMOD="-D${PARAMNAME}=$PARAMVAL"
+
+function _apply_mod()
+{
+  local BUILDDIR=$1
+  local RETCODE=1
+
+  if [ -n "$BUILDDIR" ]; then
+    if [ -d $BUILDDIR ]; then
+      meson configure $FLAGTOMOD $BUILDDIR
+      if [ $? -eq 0 ]; then
+        meson --reconfigure $BUILDDIR
+        RETCODE=$?
+      fi
+    else
+      meson $FLAGTOMOD $BUILDDIR
+      RETCODE=$?
+    fi
+  fi
+  return $RETCODE
+}
+
+function _help()
+{
+  local SCRIPTDIR=scripts
+  local SCRIPT="$SCRIPTDIR/$(basename $0)"
+
+  echo "##################### SCRIPT USAGE #####################"
+  echo "Please call this script from telemetry main directory"
+  echo "with parameter specifying name of your build directory"
+  echo "example:"
+  echo "./$SCRIPT BUILDDIRNAME"
+  echo "./$SCRIPT build"
+  echo "########################################################"
+}
+trap _help ERR
+
+### main ###
+
+_apply_mod $@
+exit $?
+
+### end ###
+

tests/meson.build

diff --git a/tests/meson.build b/tests/meson.build
index 17cd369..a3a78ec 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -56,7 +56,8 @@
             phosphor_logging,
             sdbusplus,
         ],
-        include_directories: ['../src', 'src']
+        include_directories: ['../src', 'src'],
+        cpp_args: '-fno-lto'
     ),
     timeout: 120,
 )