[Mesa-dev] [PATCH 2/2] travis: make Meson find the proper llvm-config

[Andres Gomez]

Travis CI has moved to LLVM 5.0, and meson is detecting automatically
the available version in /usr/local/bin based on the PATH env variable
order preference.

As for 0.44.x, Meson cannot receive the path to the llvm-config binary
as a configuration parameter. See
https://github.com/mesonbuild/meson/issues/2887 and
https://github.com/dcbaker/meson/commit/7c8b6ee3fa42f43c9ac7dcacc61a77eca3f1bcef

We want to use the custom (APT) installed version. Therefore, let's
make Meson find our wanted version sooner than the one at
/usr/local/bin

Once this is corrected, we would still need a patch similar to:
https://lists.freedesktop.org/archives/mesa-dev/2017-December/180217.html

Cc: Eric Engestrom <eric.engestrom at imgtec.com>
Cc: Dylan Baker <dylan at pnwbakers.com>
Cc: Emil Velikov <emil.velikov at collabora.com>
Cc: Juan A. Suarez Romero <jasuarez at igalia.com>
Cc: Gert Wollny <gw.fossdev at gmail.com>
Cc: Jon Turney <jon.turney at dronecode.org.uk>
Signed-off-by: Andres Gomez <agomez at igalia.com>
---
 .travis.yml | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 0ec08e5bff7..5081bfc5d28 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -573,8 +573,28 @@ script:
       scons $SCONS_TARGET && eval $SCONS_CHECK_COMMAND;
     fi
 
-  - if test "x$BUILD" = xmeson; then
-      export CFLAGS="$CFLAGS -isystem`pwd`";
-      meson _build $MESON_OPTIONS;
-      ninja -C _build;
+  - |
+    if test "x$BUILD" = xmeson; then
+
+      # Travis CI has moved to LLVM 5.0, and meson is detecting
+      # automatically the available version in /usr/local/bin based on
+      # the PATH env variable order preference.
+      #
+      # As for 0.44.x, Meson cannot receive the path to the
+      # llvm-config binary as a configuration parameter. See
+      # https://github.com/mesonbuild/meson/issues/2887 and
+      # https://github.com/dcbaker/meson/commit/7c8b6ee3fa42f43c9ac7dcacc61a77eca3f1bcef
+      #
+      # We want to use the custom (APT) installed version. Therefore,
+      # let's make Meson find our wanted version sooner than the one
+      # at /usr/local/bin
+      #
+      # Once this is corrected, we would still need a patch similar
+      # to:
+      # https://lists.freedesktop.org/archives/mesa-dev/2017-December/180217.html
+      test -f /usr/bin/llvm-config && ln -s /usr/bin/llvm-config $HOME/prefix/bin
+
+      export CFLAGS="$CFLAGS -isystem`pwd`"
+      meson _build $MESON_OPTIONS
+      ninja -C _build
     fi
-- 
2.15.1