Re: Issues with cross-compiling

[João Valverde <j () v6e pt>]

Hi,

You would have a better chance of receiving helpful feedback on the 
CMake side of things if you also described the actual error in detail.

On 17/01/22 02:01, Glen Huang wrote:
> Hi,
>
> I’m trying to create an OpenWrt package for Wireshark.
>
> I think I’m pretty close. However, I got stuck at lemon, which if I’m not wrong, should be compiled by my build 
> machine’s compiler. From the source code, I found out it supports the LEMON_C_COMPILER variable, which I assigned with 
> the build machine’s compiler, but after compiling, CMAKE used the target platform’s linking flags for linking, which 
> apparently failed. I’m not very familiar with CMAKE, so would appreciate some help.
>
> Cross-compiling has cropped up here a few times in the past decades, but the ones I managed to find are all pertaining 
> to Wireshark’s autotools era, so they’re not particularly helpful, at least for my limited knowledge in this area.
>
> Here is the OpenWrt package’s Makefile I have come up with so far:
>
> include $(TOPDIR)/rules.mk
>
> PKG_NAME:=wireshark
> PKG_VERSION:=3.6.1
> PKG_RELEASE:=1
>
> PKG_SOURCE_URL:=https://www.wireshark.org/download/src/
> PKG_SOURCE:=wireshark-$(PKG_VERSION).tar.xz
> PKG_HASH:=0434eda8fb6bf88e2b42a67eb5d1de254a67d505bec3bb51fee9d7cad7925a38
>
> PKG_BUILD_PARALLEL:=1
> CMAKE_INSTALL:=1
>
> include $(INCLUDE_DIR)/package.mk
> include $(INCLUDE_DIR)/cmake.mk
>
> define Package/wireshark
>    SECTION:=net
>    CATEGORY:=Network
>    TITLE:=Network protocol analyzer
>    URL:=https://www.wireshark.org/
>    DEPENDS:=+libpcap +glib2 +libgcrypt +libcares
> endef
>
> define Package/wireshark/description
>          Network protocol analyzer
> endef
>
> CMAKE_OPTIONS += \
>          -DCMAKE_CROSSCOMPILING=1 \
>          -DHAVE_C99_VSNPRINTF=TRUE \
>          -DLEMON_C_COMPILER=$(CMAKE_HOST_C_COMPILER) \
>          -DBUILD_wireshark=OFF \
>          -DBUILD_androiddump=OFF \
>          -DBUILD_ciscodump=OFF \
>          -DBUILD_idl2wrs=OFF
>
> define Package/wireshark/install
>          # figure out later
> endef
>
> $(eval $(call BuildPackage,wireshark))
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