Accepting request 424333 from home:scarabeus_iv:branches:devel:tools:compiler

- Convert to use %cmake macros

- Start conversion to use cmake macros with now introduced
  compatibility for ninja
- Reduce number of threads if we don't have enough memory
- Add patch for the nonvoid returns:
  * llvm-nonvoid-return.patch

OBS-URL: https://build.opensuse.org/request/show/424333
OBS-URL: https://build.opensuse.org/package/show/devel:tools:compiler/llvm?expand=0&rev=466

llvm.spec

@@ -77,6 +77,7 @@ Patch8:         revert-cmake-soname.patch
 Patch9:         lldb-cmake.patch
 Patch10:        glibc-2.23-libcxx.patch
 Patch11:        glibc-2.24-libcxx.patch
+Patch12:        llvm-nonvoid-return.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  binutils-devel >= 2.21.90
 BuildRequires:  bison
@@ -91,6 +92,7 @@ BuildRequires:  libstdc++-devel
 BuildRequires:  libtool
 BuildRequires:  ncurses-devel
 BuildRequires:  ninja
+BuildRequires:  procps
 BuildRequires:  python-base
 BuildRequires:  python-xml
 # llvm does not work on ppc or s390
@@ -193,6 +195,7 @@ disassembler.
 %patch10
 %patch11
 %endif
+%patch12 -p1
 
 # Move into right place
 mv cfe-%{version}.src tools/clang
@@ -235,88 +238,93 @@ EOF
 %endif
 
 %build
-TOPLEVEL=$PWD
-mkdir stage1 stage2
-pushd stage1
-
-export CC=gcc
-export CXX=g++
-
-cmake -G "Ninja" \
-      -DBUILD_SHARED_LIBS=ON \
-      -DCMAKE_BUILD_TYPE=Release \
-      -DLLVM_ENABLE_ASSERTIONS=OFF \
-      -DLLVM_TARGETS_TO_BUILD=host \
-      -DLLDB_DISABLE_PYTHON=ON \
-      ..
-
-ninja %{?_smp_mflags} clang -v
-
-popd
-pushd stage2
-
-export CC=$TOPLEVEL/stage1/bin/clang
-export CXX=$TOPLEVEL/stage1/bin/clang++
-
-cmake -G "Ninja" \
-      -DBUILD_SHARED_LIBS=ON \
-%ifarch %arm ppc64 ppc64le
-      -DCMAKE_BUILD_TYPE=Release \
-%else
-      -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-%endif
-      -DCMAKE_INSTALL_PREFIX=%{_prefix} \
+# Disable c/xx/flags as the clang fails to build with hardening right now 
+#flags="%{optflags} -fno-strict-aliasing"
+flags="-fno-strict-aliasing"
 %ifarch armv6hl
-      -DCMAKE_C_FLAGS="-mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp" \
-      -DCMAKE_CXX_FLAGS="-mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp" \
+flags+=" -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp"
 %endif
 %ifarch armv7hl
-      -DCMAKE_C_FLAGS="-mfloat-abi=hard -march=armv7-a -mtune=cortex-a9 -mfpu=vfpv3-d16" \
-      -DCMAKE_CXX_FLAGS="-mfloat-abi=hard -march=armv7-a -mtune=cortex-a9 -mfpu=vfpv3-d16" \
+flags+=" -mfloat-abi=hard -march=armv7-a -mtune=cortex-a9 -mfpu=vfpv3-d16"
+%endif
+# do not eat all memory
+ninjaproc="%{?jobs:%{jobs}}"
+echo "Available memory:"
+free
+echo "System limits:"
+ulimit -a
+if test -n "$ninjaproc" -a "$ninjaproc" -gt 1 ; then
+    mem_per_process=1000
+    max_mem=`LANG=C free -t -m | sed -n "s|^Mem: *\([0-9]*\).*$|\1|p"`
+    max_jobs="$(($max_mem / $mem_per_process))"
+    test "$ninjaproc" -gt "$max_jobs" && ninjaproc="$max_jobs" && echo "Warning: Reducing number of jobs to $max_jobs because of memory limits"
+    test "$ninjaproc" -le 0 && ninjaproc=1 && echo "Warning: Do not use the parallel build at all becuse of memory limits"
+fi
+
+%define __builder ninja
+%define __builddir stage1
+# -z,now is breaking now, it needs to be fixed
+%cmake \
+    -DCMAKE_C_FLAGS="$flags" \
+    -DCMAKE_CXX_FLAGS="$flags" \
+    -DLLVM_ENABLE_ASSERTIONS=OFF \
+    -DLLVM_TARGETS_TO_BUILD=host \
+    -DLLDB_DISABLE_PYTHON=ON \
+    -DCMAKE_SKIP_RPATH:BOOL=OFF \
+    -DCMAKE_EXE_LINKER_FLAGS="-Wl,--as-needed" \
+    -DCMAKE_MODULE_LINKER_FLAGS="-Wl,--as-needed" \
+    -DCMAKE_SHARED_LINKER_FLAGS="-Wl,--as-needed"
+ninja -v -j $ninjaproc
+cd ..
+
+%define __builddir build
+export CC=${PWD}/stage1/bin/clang
+export CXX=${PWD}/stage1/bin/clang++
+# -z,now is breaking now, it needs to be fixed
+%cmake \
+    -DCMAKE_C_FLAGS="$flags" \
+    -DCMAKE_CXX_FLAGS="$flags" \
+    -DLLVM_REQUIRES_RTTI=ON \
+    -DLLVM_ENABLE_TIMESTAMPS=OFF \
+    -DLLVM_ENABLE_ASSERTIONS=OFF \
+    -DLLVM_ENABLE_PIC=ON \
+    -DLLVM_BINUTILS_INCDIR=/usr/include \
+%ifarch %{ix86} x86_64
+    -DLLVM_TARGETS_TO_BUILD="all" \
+%else
+    -DLLVM_TARGETS_TO_BUILD=host \
 %endif
 %if "%{_lib}" == "lib64"
-      -DLLVM_LIBDIR_SUFFIX=64 \
-%endif
-      -DLLVM_REQUIRES_RTTI=ON \
-      -DLLVM_ENABLE_TIMESTAMPS=OFF \
-      -DLLVM_ENABLE_ASSERTIONS=OFF \
-      -DLLVM_ENABLE_PIC=ON \
-      -DLLVM_BINUTILS_INCDIR=/usr/include \
-%ifarch %{ix86} x86_64
-      -DLLVM_TARGETS_TO_BUILD="all" \
-%else
-      -DLLVM_TARGETS_TO_BUILD=host \
+    -DLLVM_LIBDIR_SUFFIX=64 \
 %endif
 %if %{build_lldb}
-      -DLLDB_DISABLE_PYTHON=ON \
+    -DLLDB_DISABLE_PYTHON=ON \
 %endif
-      ..
-
-ninja %{?_smp_mflags} -v
+    -DCMAKE_SKIP_RPATH:BOOL=OFF \
+    -DCMAKE_EXE_LINKER_FLAGS="-Wl,--as-needed" \
+    -DCMAKE_MODULE_LINKER_FLAGS="-Wl,--as-needed" \
+    -DCMAKE_SHARED_LINKER_FLAGS="-Wl,--as-needed"
+ninja -v -j $ninjaproc
 
 %check
-cd stage2
+cd build
 %ifnarch armv7hl armv7l
 %if 0%{!?qemu_user_space_build:1}
 # we just do not have enough memory with qemu emulation
 
-ninja check
-ninja clang-test
+ninja -v %{?_smp_mflags} check
+ninja -v %{?_smp_mflags} clang-test
 
 %if %{build_libcxx}
-
-ninja check-libcxx
-ninja check-libcxxabi
+ninja -v %{?_smp_mflags} check-libcxx
+ninja -v %{?_smp_mflags} check-libcxxabi
 %endif
 
 %endif
 %endif
 
 %install
-cd stage2
-DESTDIR=%{buildroot} ninja install
-cd ..
-
+%cmake_install
 # Build man/html pages
 cd docs
 # Docs are prebuilt due to sphinx dependency