From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Sat, 9 Jun 2018 11:12:52 +0000 (+0200)
Subject: meson: do not allow bit-shift overflows
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=ec4b18ddb9cc1df4ac410614308c6f520d6c6c81;p=elogind.git

meson: do not allow bit-shift overflows

The primary motivation is to catch enum values created through a shift that is
too big:

../src/test/test-sizeof.c:26:29: error: left shift count >= width of type [-Werror=shift-count-overflow]
         enum_with_shift = 1 << 32,
                             ^~
cc1: some warnings being treated as errors

The compiler will now reject those.

This is an alternative to #9224.
---

diff --git a/meson.build b/meson.build
index 1356ae996..fe014eda7 100644
--- a/meson.build
+++ b/meson.build
@@ -386,6 +386,7 @@ endif
 #         '-Wstrict-aliasing=2',
 #         '-Wwrite-strings',
 #         '-Werror=overflow',
+#         '-Werror=shift-count-overflow',
 #         '-Wdate-time',
 #         '-Wnested-externs',
 #         '-ffast-math',
@@ -1927,6 +1928,7 @@ executable('elogind-user-runtime-dir',
 executable('elogind-user-runtime-dir',
 executable('elogind-user-runtime-dir',
 executable('elogind-user-runtime-dir',
+executable('elogind-user-runtime-dir',
 executable('elogind-user-runtime-dir',
            user_runtime_dir_sources,
            include_directories : includes,