[Buildroot] [PATCH] qt5: use ccache for building host code
Peter Seiderer
ps.report at gmx.net
Sun Nov 4 21:12:20 UTC 2018
Hello Thomas,
On Sat, 20 Oct 2018 15:25:35 +0200, Thomas Petazzoni <thomas.petazzoni at bootlin.com> wrote:
> qt5 currently doesn't use HOSTCC/HOSTCXX, so it doesn't use ccache
> when building all its host code (especially qmake). This means that
> even with ccache enabled and a hot cache, it still takes a long time
> to build qt5base.
>
> Before this patch, building qt5base takes:
>
> - 446 seconds with a cold ccache
> - 185 seconds with a hot ccache
>
> This is because the ccache is not used for host code.
>
> After this patch, building qt5base takes:
>
> - 450 seconds with a cold ccache
> - 15 seconds with a hot ccache
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
> ---
> package/qt5/qt5base/qt5base.mk | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/package/qt5/qt5base/qt5base.mk b/package/qt5/qt5base/qt5base.mk
> index ab2b883fc4..d9f7af7196 100644
> --- a/package/qt5/qt5base/qt5base.mk
> +++ b/package/qt5/qt5base/qt5base.mk
> @@ -264,6 +264,13 @@ define QT5BASE_CONFIGURE_ARCH_CONFIG
> endef
> endif
>
> +# This allows to use ccache when available
> +define QT5BASE_CONFIGURE_HOSTCC
> + $(SED) 's,^QMAKE_COMPILER\s*=.*,QMAKE_COMPILER=$(HOSTCC),' $(@D)/mkspecs/common/g++-base.conf
> + $(SED) 's,^QMAKE_CC\s*=.*,QMAKE_CC=$(HOSTCC),' $(@D)/mkspecs/common/g++-base.conf
> + $(SED) 's,^QMAKE_CXX\s*=.*,QMAKE_CXX=$(HOSTCXX),' $(@D)/mkspecs/common/g++-base.conf
> +endef
> +
With this sed commands applied, a qmake host compile is always using ccache (same
behavior already for the cross/target compile?)?
Regards,
Peter
> define QT5BASE_CONFIGURE_CMDS
> mkdir -p $(@D)/mkspecs/devices/linux-buildroot-g++/
> sed 's/@EGLFS_DEVICE@/$(QT5BASE_EGLFS_DEVICE)/g' \
> @@ -274,6 +281,7 @@ define QT5BASE_CONFIGURE_CMDS
> $(QT5BASE_CONFIGURE_CONFIG_FILE)
> touch $(QT5BASE_ARCH_CONFIG_FILE)
> $(QT5BASE_CONFIGURE_ARCH_CONFIG)
> + $(QT5BASE_CONFIGURE_HOSTCC)
> (cd $(@D); \
> $(TARGET_MAKE_ENV) \
> PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
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