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Fix gcc warning -Wsign-compare

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Add the compile flag '-Wsign-compare' and adapt the code to fix all
cases of this warning.

Change-Id: I26b08fa5a03e4ac294daf697d32cf9140d84350d
This commit is contained in:
Lulu 2024-10-06 20:47:32 +02:00
parent ed9b7f4f84
commit d6e1b11d3e
3 changed files with 4 additions and 2 deletions
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1
meson.build
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@ -485,6 +485,7 @@ add_project_arguments(
# TODO(Qyriad): Yes this is how the autoconf+Make system did it. # TODO(Qyriad): Yes this is how the autoconf+Make system did it.
# It would be nice for our headers to be idempotent instead. # It would be nice for our headers to be idempotent instead.
'-include', 'config.h', '-include', 'config.h',
'-Wsign-compare',
'-Wno-deprecated-declarations', '-Wno-deprecated-declarations',
'-Wimplicit-fallthrough', '-Wimplicit-fallthrough',
'-Werror=switch', '-Werror=switch',

2
src/libstore/build/worker.cc
View file

@ -247,7 +247,7 @@ Worker::Results Worker::run(std::function<Targets (GoalFactory &)> req)
.exclusiveJoin(std::move(onInterrupt.promise)); .exclusiveJoin(std::move(onInterrupt.promise));
// TODO GC interface? // TODO GC interface?
if (auto localStore = dynamic_cast<LocalStore *>(&store); localStore && settings.minFree != 0) { if (auto localStore = dynamic_cast<LocalStore *>(&store); localStore && settings.minFree != 0u) {
// Periodically wake up to see if we need to run the garbage collector. // Periodically wake up to see if we need to run the garbage collector.
promise = promise.exclusiveJoin(boopGC(*localStore)); promise = promise.exclusiveJoin(boopGC(*localStore));
} }

3
tests/unit/libutil/compression.cc
View file

@ -1,4 +1,5 @@
#include "compression.hh" #include "compression.hh"
#include <cstddef>
#include <gtest/gtest.h> #include <gtest/gtest.h>
namespace nix { namespace nix {
@ -147,7 +148,7 @@ TEST_P(PerTypeNonNullCompressionTest, truncatedValidInput)
/* n.b. This also tests zero-length input, which is also invalid. /* n.b. This also tests zero-length input, which is also invalid.
* As of the writing of this comment, it returns empty output, but is * As of the writing of this comment, it returns empty output, but is
* allowed to throw a compression error instead. */ * allowed to throw a compression error instead. */
for (int i = 0; i < compressed.length(); ++i) { for (size_t i = 0u; i < compressed.length(); ++i) {
auto newCompressed = compressed.substr(compressed.length() - i); auto newCompressed = compressed.substr(compressed.length() - i);
try { try {
decompress(method, newCompressed); decompress(method, newCompressed);