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Bug 507226

Summary: dev-libs/tinyxml2 - cmake: x86_64-w64-mingw32-gcc: error: unrecognized command line option ‘-rdynamic’
Product: Gentoo Linux Reporter: J.Borme <gentoo_bugs.nu_q5v>
Component: [OLD] LibraryAssignee: Gentoo Media-video project <media-video>
Status: RESOLVED OBSOLETE    
Severity: normal CC: sam
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Whiteboard:
Package list:
Runtime testing required: ---

Description J.Borme 2014-04-09 10:56:05 UTC 
I prepared a toolchain to cross-compile for mingw using the command:
crossdev --ov-output /usr/local/portage mingw64

(I could cross-emerge several packages with it). Cross-compiling tinyxml2 however stops in the configure step with the following error: 

-- Check for working C compiler: /usr/bin/x86_64-w64-mingw32-gcc -- broken
x86_64-w64-mingw32-gcc: erreur: unrecognized command line option ‘-rdynamic’

-rdynamic has to be removed for mingw. I'm just beginning with cmake, but I think this option is removed by cmake when it has CMAKE_SYSTEM_NAME="Windows" (or "generic").

The cmake command-line for gentoo is complex… After a failed build, if I go to:
/usr/x86_64-w64-mingw32/tmp/portage/dev-libs/tinyxml2-2.0.2/work/tinyxml2-2.0.2_build

and then add a personal toolchain file on the command-line with the option: -DCMAKE_TOOLCHAIN_FILE=/tmp/Toolchain_gentoo_crossdev_mingw.cmake (I found out the option has to appear before -DCMAKE_USER_MAKE_RULES_OVERRIDE), then cmake correctly configures and builds tinyxml2 using the cross-compiler.

Full configure command is then:

cmake -C /usr/x86_64-w64-mingw32/tmp/portage/dev-libs/tinyxml2-2.0.2/work/tinyxml2-2.0.2_build/gentoo_common_config.cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_STATIC_LIBS=ON -DBUILD_TEST=OFF -DCMAKE_INSTALL_DO_STRIP=OFF -DCMAKE_TOOLCHAIN_FILE=/tmp/Toolchain_gentoo_crossdev_mingw.cmake -DCMAKE_USER_MAKE_RULES_OVERRIDE=/usr/x86_64-w64-mingw32/tmp/portage/dev-libs/tinyxml2-2.0.2/work/tinyxml2-2.0.2_build/gentoo_rules.cmake /usr/x86_64-w64-mingw32/tmp/portage/dev-libs/tinyxml2-2.0.2/work/tinyxml2-2.0.2 

Contents of my personal toolchain file is 
cat /tmp/Toolchain_gentoo_crossdev_mingw.cmake

set (CMAKE_SYSTEM_NAME Windows)
set (CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++)
set (CMAKE_RC_COMPILER x86_64-w64-mingw32-windres)

Then one would need to integrate the correct options within the ebuild or crossdev itself, and I don't know how to do that.

Reproducible: Always

Steps to Reproduce:
1. crossdev --ov-output /usr/local/portage mingw64
2. add arch="amd64" to the file /usr/portage/profiles/embedded/make.defaults
3. emerge-x86_64-w64-mingw32 tinyxml2