[oe] [meta-clang] [PATCH] clang: fix nativesdk build

[Ming Liu]

Hi, Khem:

I have not tested that with gcc7, will do that and let you know.

//Ming Liu

2017-08-23 21:23 GMT+02:00 Khem Raj <raj.khem at gmail.com>:

> On 8/23/17 12:26 AM, liu.ming50 at gmail.com wrote:
> > From: Ming Liu <peter.x.liu at external.atlascopco.com>
> >
> > I could not manage to build nativesdk-clang, I encountered errors as
> > follows: (trimmed for purpose)
> > | ../gcc/x86_64-pokysdk-linux/6.3.0/ld::
> > | cannot find crt1.o: No such file or directory
> > | cannot find crtbegin.o: No such file or directory
> > | cannot find -lgcc
> > | cannot find -lgcc_s
> >
> > After some investigation, I found it's caused by the llvm native tools
> > could not compile with crosssdk toolchains. (special linking flags
> > are needed)
> >
> > So we introduce a cmake-native class with a task to generate a native
> > toolchain file, it will be used to build llvm native tools by passed
> > with CROSS_TOOLCHAIN_FLAGS_NATIVE.
>
> I have applied it. But does this happen when you use gcc7 for gcc as well ?
> >
> > Signed-off-by: Ming Liu <peter.x.liu at external.atlascopco.com>
> > ---
> >  classes/cmake-native.bbclass        | 47 ++++++++++++++++++++++++++++++
> +++++++
> >  recipes-devtools/clang/clang_git.bb |  3 ++-
> >  2 files changed, 49 insertions(+), 1 deletion(-)
> >  create mode 100644 classes/cmake-native.bbclass
> >
> > diff --git a/classes/cmake-native.bbclass b/classes/cmake-native.bbclass
> > new file mode 100644
> > index 0000000..911476e
> > --- /dev/null
> > +++ b/classes/cmake-native.bbclass
> > @@ -0,0 +1,47 @@
> > +# We need to unset CCACHE otherwise cmake gets too confused
> > +CCACHE = ""
> > +
> > +# Native C/C++ compiler (without cpu arch/tune arguments)
> > +OECMAKE_NATIVE_C_COMPILER ?= "`echo ${BUILD_CC} | sed 's/^\([^
> ]*\).*/\1/'`"
> > +OECMAKE_NATIVE_CXX_COMPILER ?= "`echo ${BUILD_CXX} | sed 's/^\([^
> ]*\).*/\1/'`"
> > +OECMAKE_NATIVE_AR ?= "${BUILD_AR}"
> > +
> > +# Native compiler flags
> > +OECMAKE_NATIVE_C_FLAGS ?= "${BUILD_CC_ARCH} ${BUILD_CFLAGS}"
> > +OECMAKE_NATIVE_CXX_FLAGS ?= "${BUILD_CC_ARCH} ${BUILD_CXXFLAGS}"
> > +OECMAKE_NATIVE_C_FLAGS_RELEASE ?= "-DNDEBUG"
> > +OECMAKE_NATIVE_CXX_FLAGS_RELEASE ?= "-DNDEBUG"
> > +OECMAKE_NATIVE_C_LINK_FLAGS ?= "${BUILD_CC_ARCH} ${BUILD_CPPFLAGS}
> ${BUILD_LDFLAGS}"
> > +OECMAKE_NATIVE_CXX_LINK_FLAGS ?= "${BUILD_CC_ARCH} ${BUILD_CXXFLAGS}
> ${BUILD_LDFLAGS}"
> > +BUILD_CXXFLAGS += "${BUILD_CC_ARCH}"
> > +BUILD_CFLAGS += "${BUILD_CC_ARCH}"
> > +
> > +do_generate_native_toolchain_file() {
> > +        cat > ${WORKDIR}/toolchain-native.cmake <<EOF
> > +set( CMAKE_SYSTEM_NAME `echo ${BUILD_OS} | sed -e 's/^./\u&/' -e
> 's/^\(Linux\).*/\1/'` )
> > +set( CMAKE_SYSTEM_PROCESSOR ${BUILD_ARCH} )
> > +set( CMAKE_C_COMPILER ${OECMAKE_NATIVE_C_COMPILER} )
> > +set( CMAKE_CXX_COMPILER ${OECMAKE_NATIVE_CXX_COMPILER} )
> > +set( CMAKE_ASM_COMPILER ${OECMAKE_NATIVE_C_COMPILER} )
> > +set( CMAKE_AR ${OECMAKE_NATIVE_AR} CACHE FILEPATH "Archiver" )
> > +set( CMAKE_C_FLAGS "${OECMAKE_NATIVE_C_FLAGS}" CACHE STRING "CFLAGS" )
> > +set( CMAKE_CXX_FLAGS "${OECMAKE_NATIVE_CXX_FLAGS}" CACHE STRING
> "CXXFLAGS" )
> > +set( CMAKE_ASM_FLAGS "${OECMAKE_NATIVE_C_FLAGS}" CACHE STRING "ASM
> FLAGS" )
> > +set( CMAKE_C_FLAGS_RELEASE "${OECMAKE_NATIVE_C_FLAGS_RELEASE}" CACHE
> STRING "Additional CFLAGS for release" )
> > +set( CMAKE_CXX_FLAGS_RELEASE "${OECMAKE_NATIVE_CXX_FLAGS_RELEASE}"
> CACHE STRING "Additional CXXFLAGS for release" )
> > +set( CMAKE_ASM_FLAGS_RELEASE "${OECMAKE_NATIVE_C_FLAGS_RELEASE}" CACHE
> STRING "Additional ASM FLAGS for release" )
> > +set( CMAKE_C_LINK_FLAGS "${OECMAKE_NATIVE_C_LINK_FLAGS}" CACHE STRING
> "LDFLAGS" )
> > +set( CMAKE_CXX_LINK_FLAGS "${OECMAKE_NATIVE_CXX_LINK_FLAGS}" CACHE
> STRING "LDFLAGS" )
> > +
> > +set( CMAKE_FIND_ROOT_PATH ${STAGING_DIR_NATIVE} )
> > +set( CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY )
> > +set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH )
> > +set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
> > +set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
> > +
> > +# Use native cmake modules
> > +list(APPEND CMAKE_MODULE_PATH "${STAGING_DATADIR_NATIVE}/
> cmake/Modules/")
> > +EOF
> > +}
> > +
> > +addtask generate_native_toolchain_file after do_patch before
> do_configure
> > diff --git a/recipes-devtools/clang/clang_git.bb
> b/recipes-devtools/clang/clang_git.bb
> > index fb7854c..c226093 100644
> > --- a/recipes-devtools/clang/clang_git.bb
> > +++ b/recipes-devtools/clang/clang_git.bb
> > @@ -27,7 +27,7 @@ INHIBIT_DEFAULT_DEPS = "1"
> >
> >  S = "${WORKDIR}/git"
> >
> > -inherit cmake
> > +inherit cmake cmake-native
> >
> >  OECMAKE_FIND_ROOT_PATH_MODE_PROGRAM = "BOTH"
> >
> > @@ -85,6 +85,7 @@ EXTRA_OECMAKE_append_class-native = "\
> >  "
> >  EXTRA_OECMAKE_append_class-nativesdk = "\
> >                    -DCMAKE_CROSSCOMPILING:BOOL=ON \
> > +                  -DCROSS_TOOLCHAIN_FLAGS_NATIVE='-DCMAKE_TOOLCHAIN_
> FILE=${WORKDIR}/toolchain-native.cmake' \
> >                    -DLLVM_TARGETS_TO_BUILD='${LLVM_TARGETS_TO_BUILD}' \
> >                    -DLLVM_TABLEGEN=${STAGING_BINDIR_NATIVE}/llvm-tblgen
> \
> >                    -DCLANG_TABLEGEN=${STAGING_BINDIR_NATIVE}/clang-tblgen
> \
> >
>
>