Fix gcc warning -Wmissing-field-initializers

The approach that was taken here was to add default values to the type
definitions rather than specify them whenever they are missing.

Now the only remaining warning is '-Wunused-parameter' which @jade said
is usually counterproductive and that we can just disable it:
https://git.lix.systems/lix-project/lix/issues/456#issuecomment-6617

So this change adds the flags '-Wall', '-Wextra' and
'-Wno-unused-parameter', so that all warnings are enabled except for
'-Wunused-parameter'.

Change-Id: Ic223a964d67ab429e8da804c0721ba5e25d53012

1 files changed, 5 insertions, 5 deletions

diff --git a/src/libutil/processes.hh b/src/libutil/processes.hh
index dc09a9ba4..dd6e2978e 100644
--- a/src/libutil/processes.hh
+++ b/src/libutil/processes.hh
@@ -78,11 +78,11 @@ struct RunOptions
 {
     Path program;
     bool searchPath = true;
-    Strings args;
-    std::optional<uid_t> uid;
-    std::optional<uid_t> gid;
-    std::optional<Path> chdir;
-    std::optional<std::map<std::string, std::string>> environment;
+    Strings args = {};
+    std::optional<uid_t> uid = {};
+    std::optional<uid_t> gid = {};
+    std::optional<Path> chdir = {};
+    std::optional<std::map<std::string, std::string>> environment = {};
     bool captureStdout = false;
     bool mergeStderrToStdout = false;
     bool isInteractive = false;