Re: Issues with cross-compiling

[Glen Huang <heyhgl () gmail com>]

Sure,

This is the compilation error I got

gcc -DNDEBUG -L/sdk/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/usr/lib 
-L/sdk/staging_dir/toolchain-x86_64_gcc-8.4.0_musl/lib -znow -zrelro -fPIE -pie CMakeFiles/lemon.dir/lemon.c.o -o 
../../run/lemon 
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x12): undefined reference to `__libc_csu_fini'
/usr/bin/ld: (.text+0x19): undefined reference to `__libc_csu_init'
collect2: error: ld returned 1 exit status

I don’t think musl should show up here, since my build machine is Debian.

> On Jan 17, 2022, at 10:09 PM, João Valverde <j () v6e pt> wrote:
>
> 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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>
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