Re: [PATCH bpf-next v2] samples/bpf: Update README.rst and Makefile for manually compiling LLVM and clang
On Mon, Jan 18, 2021 at 11:56 PM Tiezhu Yang wrote: > > The current llvm/clang build procedure in samples/bpf/README.rst is > out of date. See below that the links are not accessible any more. > > $ git clone http://llvm.org/git/llvm.git > Cloning into 'llvm'... > fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) > redirects followed > $ git clone --depth 1 http://llvm.org/git/clang.git > Cloning into 'clang'... > fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) > redirects followed > > The llvm community has adopted new ways to build the compiler. There are > different ways to build llvm/clang, the Clang Getting Started page [1] has > one way. As Yonghong said, it is better to just copy the build procedure > in Documentation/bpf/bpf_devel_QA.rst to keep consistent. > > I verified the procedure and it is proved to be feasible, so we should > update README.rst to reflect the reality. At the same time, update the > related comment in Makefile. > > [1] https://clang.llvm.org/get_started.html There's also https://www.kernel.org/doc/html/latest/kbuild/llvm.html#getting-llvm (could cross link in rst/sphinx). > > Signed-off-by: Tiezhu Yang > Acked-by: Yonghong Song > --- > > v2: Update the commit message suggested by Yonghong, > thank you very much. > > samples/bpf/Makefile | 2 +- > samples/bpf/README.rst | 17 ++--- > 2 files changed, 11 insertions(+), 8 deletions(-) > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > index 26fc96c..d061446 100644 > --- a/samples/bpf/Makefile > +++ b/samples/bpf/Makefile > @@ -208,7 +208,7 @@ TPROGLDLIBS_xdpsock += -pthread -lcap > TPROGLDLIBS_xsk_fwd+= -pthread > > # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on > cmdline: > -# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc > CLANG=~/git/llvm/build/bin/clang > +# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc > CLANG=~/git/llvm-project/llvm/build/bin/clang > LLC ?= llc > CLANG ?= clang > OPT ?= opt > diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst > index dd34b2d..d1be438 100644 > --- a/samples/bpf/README.rst > +++ b/samples/bpf/README.rst > @@ -65,17 +65,20 @@ To generate a smaller llc binary one can use:: > Quick sniplet for manually compiling LLVM and clang > (build dependencies are cmake and gcc-c++):: > > - $ git clone http://llvm.org/git/llvm.git > - $ cd llvm/tools > - $ git clone --depth 1 http://llvm.org/git/clang.git > - $ cd ..; mkdir build; cd build > - $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" Is the BPF target not yet on by default? I frown upon disabling other backends. > - $ make -j $(getconf _NPROCESSORS_ONLN) > + $ git clone https://github.com/llvm/llvm-project.git > + $ mkdir -p llvm-project/llvm/build/install > + $ cd llvm-project/llvm/build > + $ cmake .. -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ > +-DLLVM_ENABLE_PROJECTS="clang"\ > +-DBUILD_SHARED_LIBS=OFF \ > +-DCMAKE_BUILD_TYPE=Release\ > +-DLLVM_BUILD_RUNTIME=OFF > + $ ninja > > It is also possible to point make to the newly compiled 'llc' or > 'clang' command via redefining LLC or CLANG on the make command line:: > > - make M=samples/bpf LLC=~/git/llvm/build/bin/llc > CLANG=~/git/llvm/build/bin/clang > + make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc > CLANG=~/git/llvm-project/llvm/build/bin/clang > > Cross compiling samples > --- > -- > 2.1.0 > > -- > You received this message because you are subscribed to the Google Groups > "Clang Built Linux" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clang-built-linux+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/clang-built-linux/1611042978-21473-1-git-send-email-yangtiezhu%40loongson.cn. -- Thanks, ~Nick Desaulniers
Re: [PATCH bpf-next v2] samples/bpf: Update README.rst and Makefile for manually compiling LLVM and clang
On 1/19/21 6:32 PM, Tiezhu Yang wrote: On 01/20/2021 05:58 AM, Fangrui Song wrote: On 2021-01-19, Tiezhu Yang wrote: The current llvm/clang build procedure in samples/bpf/README.rst is out of date. See below that the links are not accessible any more. $ git clone http://llvm.org/git/llvm.git Cloning into 'llvm'... fatal: unable to access 'http://llvm.org/git/llvm.git/ ': Maximum (20) redirects followed $ git clone --depth 1 http://llvm.org/git/clang.git Cloning into 'clang'... fatal: unable to access 'http://llvm.org/git/clang.git/ ': Maximum (20) redirects followed The llvm community has adopted new ways to build the compiler. There are different ways to build llvm/clang, the Clang Getting Started page [1] has one way. As Yonghong said, it is better to just copy the build procedure in Documentation/bpf/bpf_devel_QA.rst to keep consistent. I verified the procedure and it is proved to be feasible, so we should update README.rst to reflect the reality. At the same time, update the related comment in Makefile. [1] https://clang.llvm.org/get_started.html Signed-off-by: Tiezhu Yang Acked-by: Yonghong Song --- v2: Update the commit message suggested by Yonghong, thank you very much. samples/bpf/Makefile | 2 +- samples/bpf/README.rst | 17 ++--- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 26fc96c..d061446 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -208,7 +208,7 @@ TPROGLDLIBS_xdpsock += -pthread -lcap TPROGLDLIBS_xsk_fwd += -pthread # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: -# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang +# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang LLC ?= llc CLANG ?= clang OPT ?= opt diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst index dd34b2d..d1be438 100644 --- a/samples/bpf/README.rst +++ b/samples/bpf/README.rst @@ -65,17 +65,20 @@ To generate a smaller llc binary one can use:: Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):: - $ git clone http://llvm.org/git/llvm.git - $ cd llvm/tools - $ git clone --depth 1 http://llvm.org/git/clang.git - $ cd ..; mkdir build; cd build - $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" - $ make -j $(getconf _NPROCESSORS_ONLN) + $ git clone https://github.com/llvm/llvm-project.git + $ mkdir -p llvm-project/llvm/build/install llvm-project/llvm/build/install is not used. Yes, just mkdir -p llvm-project/llvm/build is OK. + $ cd llvm-project/llvm/build + $ cmake .. -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ + -DLLVM_ENABLE_PROJECTS="clang" \ + -DBUILD_SHARED_LIBS=OFF \ -DBUILD_SHARED_LIBS=OFF is the default. It can be omitted. I search the related doc [1] [2], remove this option is OK for me. BUILD_SHARED_LIBS:BOOL Flag indicating if each LLVM component (e.g. Support) is built as a shared library (ON) or as a static library (OFF). Its default value is OFF. [1] https://www.llvm.org/docs/CMake.html [2] https://cmake.org/cmake/help/latest/variable/BUILD_SHARED_LIBS.html + -DCMAKE_BUILD_TYPE=Release \ + -DLLVM_BUILD_RUNTIME=OFF -DLLVM_BUILD_RUNTIME=OFF can be omitted if none of compiler-rt/libc++/libc++abi is built. I am not very sure about it because the default value of LLVM_BUILD_RUNTIME is ON? [3] option(LLVM_BUILD_RUNTIME "Build the LLVM runtime libraries." ON) [3] https://github.com/llvm/llvm-project/blob/main/llvm/CMakeLists.txt If anyone has any more suggestions, please let me know. I will send v3 after waiting for other feedback. By the way, Documentation/bpf/bpf_devel_QA.rst maybe need a separate patch to remove some cmake options? Please submit updated this patch and Documentation/bpf/bpf_devel_QA.rst together. This way, it is easy to cross check. Thanks. Thanks, Tiezhu [...]
Re: [PATCH bpf-next v2] samples/bpf: Update README.rst and Makefile for manually compiling LLVM and clang
On 01/20/2021 10:43 AM, Nick Desaulniers wrote: On Mon, Jan 18, 2021 at 11:56 PM Tiezhu Yang wrote: The current llvm/clang build procedure in samples/bpf/README.rst is out of date. See below that the links are not accessible any more. $ git clone http://llvm.org/git/llvm.git Cloning into 'llvm'... fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) redirects followed $ git clone --depth 1 http://llvm.org/git/clang.git Cloning into 'clang'... fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) redirects followed The llvm community has adopted new ways to build the compiler. There are different ways to build llvm/clang, the Clang Getting Started page [1] has one way. As Yonghong said, it is better to just copy the build procedure in Documentation/bpf/bpf_devel_QA.rst to keep consistent. I verified the procedure and it is proved to be feasible, so we should update README.rst to reflect the reality. At the same time, update the related comment in Makefile. [1] https://clang.llvm.org/get_started.html There's also https://www.kernel.org/doc/html/latest/kbuild/llvm.html#getting-llvm (could cross link in rst/sphinx). Signed-off-by: Tiezhu Yang Acked-by: Yonghong Song --- v2: Update the commit message suggested by Yonghong, thank you very much. samples/bpf/Makefile | 2 +- samples/bpf/README.rst | 17 ++--- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 26fc96c..d061446 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -208,7 +208,7 @@ TPROGLDLIBS_xdpsock += -pthread -lcap TPROGLDLIBS_xsk_fwd+= -pthread # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: -# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang +# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang LLC ?= llc CLANG ?= clang OPT ?= opt diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst index dd34b2d..d1be438 100644 --- a/samples/bpf/README.rst +++ b/samples/bpf/README.rst @@ -65,17 +65,20 @@ To generate a smaller llc binary one can use:: Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):: - $ git clone http://llvm.org/git/llvm.git - $ cd llvm/tools - $ git clone --depth 1 http://llvm.org/git/clang.git - $ cd ..; mkdir build; cd build - $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" Is the BPF target not yet on by default? The default value includes BPF. I frown upon disabling other backends. I think the initial aim of the build procedure in samples/bpf/README.rst [1] is a simple and quick start guide: [ To generate a smaller llc binary one can use: -DLLVM_TARGETS_TO_BUILD="BPF" ] [1] https://github.com/torvalds/linux/blob/master/samples/bpf/README.rst - $ make -j $(getconf _NPROCESSORS_ONLN) + $ git clone https://github.com/llvm/llvm-project.git + $ mkdir -p llvm-project/llvm/build/install + $ cd llvm-project/llvm/build + $ cmake .. -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ +-DLLVM_ENABLE_PROJECTS="clang"\ +-DBUILD_SHARED_LIBS=OFF \ +-DCMAKE_BUILD_TYPE=Release\ +-DLLVM_BUILD_RUNTIME=OFF + $ ninja It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:: - make M=samples/bpf LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang + make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang Cross compiling samples --- -- 2.1.0 -- You received this message because you are subscribed to the Google Groups "Clang Built Linux" group. To unsubscribe from this group and stop receiving emails from it, send an email to clang-built-linux+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/clang-built-linux/1611042978-21473-1-git-send-email-yangtiezhu%40loongson.cn.
Re: [PATCH bpf-next v2] samples/bpf: Update README.rst and Makefile for manually compiling LLVM and clang
On 01/20/2021 05:58 AM, Fangrui Song wrote: On 2021-01-19, Tiezhu Yang wrote: The current llvm/clang build procedure in samples/bpf/README.rst is out of date. See below that the links are not accessible any more. $ git clone http://llvm.org/git/llvm.git Cloning into 'llvm'... fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) redirects followed $ git clone --depth 1 http://llvm.org/git/clang.git Cloning into 'clang'... fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) redirects followed The llvm community has adopted new ways to build the compiler. There are different ways to build llvm/clang, the Clang Getting Started page [1] has one way. As Yonghong said, it is better to just copy the build procedure in Documentation/bpf/bpf_devel_QA.rst to keep consistent. I verified the procedure and it is proved to be feasible, so we should update README.rst to reflect the reality. At the same time, update the related comment in Makefile. [1] https://clang.llvm.org/get_started.html Signed-off-by: Tiezhu Yang Acked-by: Yonghong Song --- v2: Update the commit message suggested by Yonghong, thank you very much. samples/bpf/Makefile | 2 +- samples/bpf/README.rst | 17 ++--- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 26fc96c..d061446 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -208,7 +208,7 @@ TPROGLDLIBS_xdpsock+= -pthread -lcap TPROGLDLIBS_xsk_fwd+= -pthread # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: -# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang +# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang LLC ?= llc CLANG ?= clang OPT ?= opt diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst index dd34b2d..d1be438 100644 --- a/samples/bpf/README.rst +++ b/samples/bpf/README.rst @@ -65,17 +65,20 @@ To generate a smaller llc binary one can use:: Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):: - $ git clone http://llvm.org/git/llvm.git - $ cd llvm/tools - $ git clone --depth 1 http://llvm.org/git/clang.git - $ cd ..; mkdir build; cd build - $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" - $ make -j $(getconf _NPROCESSORS_ONLN) + $ git clone https://github.com/llvm/llvm-project.git + $ mkdir -p llvm-project/llvm/build/install llvm-project/llvm/build/install is not used. Yes, just mkdir -p llvm-project/llvm/build is OK. + $ cd llvm-project/llvm/build + $ cmake .. -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ +-DLLVM_ENABLE_PROJECTS="clang"\ +-DBUILD_SHARED_LIBS=OFF \ -DBUILD_SHARED_LIBS=OFF is the default. It can be omitted. I search the related doc [1] [2], remove this option is OK for me. BUILD_SHARED_LIBS:BOOL Flag indicating if each LLVM component (e.g. Support) is built as a shared library (ON) or as a static library (OFF). Its default value is OFF. [1] https://www.llvm.org/docs/CMake.html [2] https://cmake.org/cmake/help/latest/variable/BUILD_SHARED_LIBS.html + -DCMAKE_BUILD_TYPE=Release\ +-DLLVM_BUILD_RUNTIME=OFF -DLLVM_BUILD_RUNTIME=OFF can be omitted if none of compiler-rt/libc++/libc++abi is built. I am not very sure about it because the default value of LLVM_BUILD_RUNTIME is ON? [3] option(LLVM_BUILD_RUNTIME "Build the LLVM runtime libraries." ON) [3] https://github.com/llvm/llvm-project/blob/main/llvm/CMakeLists.txt If anyone has any more suggestions, please let me know. I will send v3 after waiting for other feedback. By the way, Documentation/bpf/bpf_devel_QA.rst maybe need a separate patch to remove some cmake options? Thanks, Tiezhu + $ ninja It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:: - make M=samples/bpf LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang + make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang Cross compiling samples --- -- 2.1.0 -- You received this message because you are subscribed to the Google Groups "Clang Built Linux" group. To unsubscribe from this group and stop receiving emails from it, send an email to clang-built-linux+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/clang-built-linux/1611042978-21473-1-git-send-email-yangtiezhu%40loongson.cn.
Re: [PATCH bpf-next v2] samples/bpf: Update README.rst and Makefile for manually compiling LLVM and clang
On 2021-01-19, Tiezhu Yang wrote: The current llvm/clang build procedure in samples/bpf/README.rst is out of date. See below that the links are not accessible any more. $ git clone http://llvm.org/git/llvm.git Cloning into 'llvm'... fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) redirects followed $ git clone --depth 1 http://llvm.org/git/clang.git Cloning into 'clang'... fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) redirects followed The llvm community has adopted new ways to build the compiler. There are different ways to build llvm/clang, the Clang Getting Started page [1] has one way. As Yonghong said, it is better to just copy the build procedure in Documentation/bpf/bpf_devel_QA.rst to keep consistent. I verified the procedure and it is proved to be feasible, so we should update README.rst to reflect the reality. At the same time, update the related comment in Makefile. [1] https://clang.llvm.org/get_started.html Signed-off-by: Tiezhu Yang Acked-by: Yonghong Song --- v2: Update the commit message suggested by Yonghong, thank you very much. samples/bpf/Makefile | 2 +- samples/bpf/README.rst | 17 ++--- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 26fc96c..d061446 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -208,7 +208,7 @@ TPROGLDLIBS_xdpsock += -pthread -lcap TPROGLDLIBS_xsk_fwd += -pthread # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: -# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang +# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang LLC ?= llc CLANG ?= clang OPT ?= opt diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst index dd34b2d..d1be438 100644 --- a/samples/bpf/README.rst +++ b/samples/bpf/README.rst @@ -65,17 +65,20 @@ To generate a smaller llc binary one can use:: Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):: - $ git clone http://llvm.org/git/llvm.git - $ cd llvm/tools - $ git clone --depth 1 http://llvm.org/git/clang.git - $ cd ..; mkdir build; cd build - $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" - $ make -j $(getconf _NPROCESSORS_ONLN) + $ git clone https://github.com/llvm/llvm-project.git + $ mkdir -p llvm-project/llvm/build/install llvm-project/llvm/build/install is not used. + $ cd llvm-project/llvm/build + $ cmake .. -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ +-DLLVM_ENABLE_PROJECTS="clang"\ +-DBUILD_SHARED_LIBS=OFF \ -DBUILD_SHARED_LIBS=OFF is the default. It can be omitted. +-DCMAKE_BUILD_TYPE=Release\ +-DLLVM_BUILD_RUNTIME=OFF -DLLVM_BUILD_RUNTIME=OFF can be omitted if none of compiler-rt/libc++/libc++abi is built. + $ ninja It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:: - make M=samples/bpf LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang + make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang Cross compiling samples --- -- 2.1.0 -- You received this message because you are subscribed to the Google Groups "Clang Built Linux" group. To unsubscribe from this group and stop receiving emails from it, send an email to clang-built-linux+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/clang-built-linux/1611042978-21473-1-git-send-email-yangtiezhu%40loongson.cn.
[PATCH bpf-next v2] samples/bpf: Update README.rst and Makefile for manually compiling LLVM and clang
The current llvm/clang build procedure in samples/bpf/README.rst is out of date. See below that the links are not accessible any more. $ git clone http://llvm.org/git/llvm.git Cloning into 'llvm'... fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) redirects followed $ git clone --depth 1 http://llvm.org/git/clang.git Cloning into 'clang'... fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) redirects followed The llvm community has adopted new ways to build the compiler. There are different ways to build llvm/clang, the Clang Getting Started page [1] has one way. As Yonghong said, it is better to just copy the build procedure in Documentation/bpf/bpf_devel_QA.rst to keep consistent. I verified the procedure and it is proved to be feasible, so we should update README.rst to reflect the reality. At the same time, update the related comment in Makefile. [1] https://clang.llvm.org/get_started.html Signed-off-by: Tiezhu Yang Acked-by: Yonghong Song --- v2: Update the commit message suggested by Yonghong, thank you very much. samples/bpf/Makefile | 2 +- samples/bpf/README.rst | 17 ++--- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 26fc96c..d061446 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -208,7 +208,7 @@ TPROGLDLIBS_xdpsock += -pthread -lcap TPROGLDLIBS_xsk_fwd+= -pthread # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: -# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang +# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang LLC ?= llc CLANG ?= clang OPT ?= opt diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst index dd34b2d..d1be438 100644 --- a/samples/bpf/README.rst +++ b/samples/bpf/README.rst @@ -65,17 +65,20 @@ To generate a smaller llc binary one can use:: Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):: - $ git clone http://llvm.org/git/llvm.git - $ cd llvm/tools - $ git clone --depth 1 http://llvm.org/git/clang.git - $ cd ..; mkdir build; cd build - $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" - $ make -j $(getconf _NPROCESSORS_ONLN) + $ git clone https://github.com/llvm/llvm-project.git + $ mkdir -p llvm-project/llvm/build/install + $ cd llvm-project/llvm/build + $ cmake .. -G "Ninja" -DLLVM_TARGETS_TO_BUILD="BPF;X86" \ +-DLLVM_ENABLE_PROJECTS="clang"\ +-DBUILD_SHARED_LIBS=OFF \ +-DCMAKE_BUILD_TYPE=Release\ +-DLLVM_BUILD_RUNTIME=OFF + $ ninja It is also possible to point make to the newly compiled 'llc' or 'clang' command via redefining LLC or CLANG on the make command line:: - make M=samples/bpf LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang + make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang Cross compiling samples --- -- 2.1.0
