docs: add instructions to specify LLVM version for basic testing

The "Perform basic testing" and "Use the release.sh script from xorg
util-modular" sections provide some instructions to do so. We add now
some comments in order to use a recent enough LLVM version to run
dist/distcheck and the automake generated binaries.

v2: Suggested the need to define LLVM_CONFIG also before running the
    release.sh script.

Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

diff --git a/docs/releasing.html b/docs/releasing.html
index 99707bee3f5f03f245150a63be18e0231fe997b5..85ab6ae8cb1b4b5f47f448877d8927f39cb9e9e4 100644 (file)
--- a/docs/releasing.html
+++ b/docs/releasing.html
@@ -437,6 +437,8 @@ Here is one solution that I've been using.
        chmod 755 -fR $__build_root; rm -rf $__build_root
        mkdir -p $__build_root && cd $__build_root
 
+       # For the distcheck, you may want to specify which LLVM to use:
+       # export LLVM_CONFIG=/usr/lib/llvm-3.9/bin/llvm-config
        $__mesa_root/autogen.sh && make -j2 distcheck
 
        # Build check the tarballs (scons, linux)
@@ -445,18 +447,22 @@ Here is one solution that I've been using.
        cd .. && rm -rf mesa-$__version
 
        # Build check the tarballs (scons, windows/mingw)
+       # You may need to unset LLVM if you set it before:
+       # unset LLVM_CONFIG
        tar -xaf mesa-$__version.tar.xz && cd mesa-$__version
        scons platform=windows toolchain=crossmingw
        cd .. && rm -rf mesa-$__version
 
        # Test the automake binaries
        tar -xaf mesa-$__version.tar.xz && cd mesa-$__version
+       # You may want to specify which LLVM to use:
        ./configure \
                --with-dri-drivers=i965,swrast \
                --with-gallium-drivers=swrast \
                --with-vulkan-drivers=intel \
                --enable-llvm-shared-libs \
                --enable-llvm \
+               --with-llvm-prefix=/usr/lib/llvm-3.9 \
                --enable-glx-tls \
                --enable-gbm \
                --enable-egl \
@@ -540,6 +546,8 @@ Start the release process.
 </p>
 
 <pre>
+       # For the dist/distcheck, you may want to specify which LLVM to use:
+       # export LLVM_CONFIG=/usr/lib/llvm-3.9/bin/llvm-config
        ../relative/path/to/release.sh . # append --dist if you've already done distcheck above
 </pre>