ninjabackend: List PDBs in output list for targets

This is more correct, and forces the target(s) to be rebuilt if the
PDB files are missing. Increases the minimum required Ninja to 1.7,
which is available in Ubuntu 16.04 under backports.

We can't do the same for import libraries, because it is impossible
for us to know at configure time whether or not an import library will
be generated for a given DLL.

1 files changed, 10 insertions, 0 deletions

diff --git a/docs/markdown/snippets/ninja_version_bump.md b/docs/markdown/snippets/ninja_version_bump.md
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+## Ninja version requirement bumped to 1.7
+
+Meson now uses the [Implicit outputs](https://ninja-build.org/manual.html#ref_outputs)
+feature of Ninja for some types of targets that have multiple outputs which may
+not be listed on the command-line. This feature requires Ninja 1.7+.
+
+Note that the latest version of [Ninja available in Ubuntu 16.04](https://packages.ubuntu.com/search?keywords=ninja-build&searchon=names&suite=xenial-backports&section=all)
+(the oldest Ubuntu LTS at the time of writing) is 1.7.1. If your distro does
+not ship with a new-enough Ninja, you can download the latest release from
+Ninja's GitHub page: https://github.com/ninja-build/ninja/releases