Re: [Qemu-devel] [PATCH v4 9/9] disas: Add capstone as submodule

["Alex Bennée" <alex.bennee@linaro.org>]

Richard Henderson <richard.henderson@linaro.org> writes:

> Do not require the submodule, but use it if present (in preference
> even to a system copy).  This will allow us to easily use capstone
> in older systems for which a package is not available, and also
> easily track bug fixes from upstream.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  Makefile    | 13 +++++++++++++
>  .gitmodules |  3 +++
>  capstone    |  1 +
>  configure   | 12 +++++++++++-
>  4 files changed, 28 insertions(+), 1 deletion(-)
>  create mode 160000 capstone
>
> diff --git a/Makefile b/Makefile
> index cee6e28659..7ff366f6ca 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -336,6 +336,19 @@ subdir-dtc:dtc/libfdt dtc/tests
>  dtc/%:
>  	mkdir -p $@
>
> +# Overriding CFLAGS causes us to lose defines added in the sub-makefile.
> +# Not overriding CFLAGS leads to mis-matches between compilation modes.
> +# Therefore we replicate some of the logic in the sub-makefile.
> +CAP_CFLAGS = $(subst -Werror,,$(CFLAGS) $(QEMU_CFLAGS))
> +CAP_CFLAGS += -DCAPSTONE_USE_SYS_DYN_MEM
> +CAP_CFLAGS += -DCAPSTONE_HAS_ARM
> +CAP_CFLAGS += -DCAPSTONE_HAS_ARM64
> +CAP_CFLAGS += -DCAPSTONE_HAS_POWERPC
> +CAP_CFLAGS += -DCAPSTONE_HAS_X86
> +
> +subdir-capstone:
> +	$(call quiet-command,$(MAKE) -C $(SRC_PATH)/capstone CAPSTONE_SHARED=no BUILDDIR="$(BUILD_DIR)/capstone" CC="$(CC)" AR="$(AR)" LD="$(LD)" CFLAGS="$(CAP_CFLAGS)" $(SUBDIR_MAKEFLAGS) $(BUILD_DIR)/capstone/libcapstone.a)
> +
>  $(SUBDIR_RULES): libqemuutil.a $(common-obj-y) $(chardev-obj-y) \
>  	$(qom-obj-y) $(crypto-aes-obj-$(CONFIG_USER_ONLY))
>
> diff --git a/.gitmodules b/.gitmodules
> index 84c54cdc49..bcb80d701a 100644
> --- a/.gitmodules
> +++ b/.gitmodules
> @@ -34,3 +34,6 @@
>  [submodule "roms/QemuMacDrivers"]
>  	path = roms/QemuMacDrivers
>  	url = git://git.qemu.org/QemuMacDrivers.git
> +[submodule "capstone"]
> +	path = capstone
> +	url = https://github.com/aquynh/capstone.git
> diff --git a/capstone b/capstone
> new file mode 160000
> index 0000000000..a279481dbf
> --- /dev/null
> +++ b/capstone
> @@ -0,0 +1 @@
> +Subproject commit a279481dbfd54bb1e2336d771e89978cc6d43176
> diff --git a/configure b/configure
> index 3777db91b6..a6cf0a5a15 100755
> --- a/configure
> +++ b/configure
> @@ -4380,7 +4380,14 @@ fi
>  # capstone
>
>  if test "$capstone" != no; then
> -  if $pkg_config capstone; then
> +  if test -f ${source_path}/capstone/Makefile ; then
> +    # have submodule capstone - use it
> +    capstone=yes
> +    capstone_internal=yes
> +    mkdir -p capstone

Having a mkdir -p here seems a little out of place. Shouldn't the build
directory creation be handled by the make recipe?

> +    QEMU_CFLAGS="$QEMU_CFLAGS -I\$(SRC_PATH)/capstone/include"
> +    LIBS="\$(BUILD_DIR)/capstone/libcapstone.a $LIBS"
> +  elif $pkg_config capstone; then
>      capstone=yes
>      QEMU_CFLAGS="$QEMU_CFLAGS $($pkg_config --cflags capstone)"
>      LIBS="$($pkg_config --libs capstone) $LIBS"
> @@ -6596,6 +6603,9 @@ done # for target in $targets
>  if [ "$dtc_internal" = "yes" ]; then
>    echo "config-host.h: subdir-dtc" >> $config_host_mak
>  fi
> +if [ "$capstone_internal" = "yes" ]; then
> +  echo "config-host.h: subdir-capstone" >> $config_host_mak
> +fi
>
>  if test "$numa" = "yes"; then
>    echo "CONFIG_NUMA=y" >> $config_host_mak


--
Alex Bennée