From a3576d312c4346423e7e1152871ede05ab843fe3 Mon Sep 17 00:00:00 2001
From: Thomas Haller <thaller@redhat.com>
Date: Mon, 23 Nov 2020 18:47:54 +0100
Subject: [PATCH] build/meson: fix build to always set "-W" compiler flags

We must set these compiler flags independent as to whether this
is a release build or a debug build.

In most cases, we don't differentiate between release and debug build
anyway. Granted, we have "-D more_asserts=100" and set "-O" CFLAGS,
but that is more granular and not a simple "buildtype".

In particular, these compiler flags apply to all kinds of builds.

This is important, because otherwise we get build failures, because
also in release build we want to build with `-Werror` and `-Wall`.

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/692
(cherry picked from commit c0c6470e4d21cc7dfa6db27bb78b316304ff0756)
(cherry picked from commit 6b316a1991e28430e551269affaac1508904cfcf)
(cherry picked from commit 805c9fa8d439a37d16d5fef6dee8fb83648eb074)
---
 meson.build | 117 +++++++++++++++++++++++++---------------------------
 1 file changed, 56 insertions(+), 61 deletions(-)

diff --git a/meson.build b/meson.build
index 94f110e50b..2edd103322 100644
--- a/meson.build
+++ b/meson.build
@@ -67,8 +67,6 @@ libnm_version = '@0@.@1@.@2@'.format(current - age, age, revision)
 
 libnm_pkgincludedir = join_paths(nm_includedir, libnm_name)
 
-nm_debug = get_option('buildtype').contains('debug')
-
 gnome = import('gnome')
 i18n = import('i18n')
 pkg = import('pkgconfig')
@@ -175,67 +173,64 @@ if enable_lto
   common_ldflags += lto_flag
 endif
 
-if nm_debug
-  common_flags += cc.get_supported_arguments([
-    '-Wall',
-    '-Wextra',
-    '-Wdeclaration-after-statement',
-    '-Wfloat-equal',
-    '-Wformat-nonliteral',
-    '-Wformat-security',
-    '-Wimplicit-function-declaration',
-    '-Winit-self',
-    '-Wlogical-op',
-    '-Wmissing-declarations',
-    '-Wmissing-include-dirs',
-    '-Wmissing-prototypes',
-    '-Wpointer-arith',
-    '-Wshadow',
-    '-Wshift-negative-value',
-    '-Wstrict-prototypes',
-    '-Wundef',
-    '-Wvla',
-    '-Wno-duplicate-decl-specifier',
-    '-Wno-format-truncation',
-    '-Wno-format-y2k',
-    '-Wno-gnu-variable-sized-type-not-at-end',
-    '-Wno-missing-field-initializers',
-    '-Wno-pragmas',
-    '-Wno-sign-compare',
-    '-Wno-tautological-constant-out-of-range-compare',
-    '-Wno-unknown-pragmas',
-    '-Wno-unused-parameter',
-    '-Wparentheses-equality',
-    '-Wpointer-arith',
-    '-Wshadow',
-    '-Wstrict-prototypes',
-    '-Wtypedef-redefinition',
-    '-Wundef',
-    '-Wunknown-attributes',
-    '-fno-strict-aliasing',
-  ])
+common_flags += cc.get_supported_arguments([
+  '-Wall',
+  '-Wextra',
+  '-Wdeclaration-after-statement',
+  '-Wfloat-equal',
+  '-Wformat-nonliteral',
+  '-Wformat-security',
+  '-Wimplicit-function-declaration',
+  '-Winit-self',
+  '-Wlogical-op',
+  '-Wmissing-declarations',
+  '-Wmissing-include-dirs',
+  '-Wmissing-prototypes',
+  '-Wpointer-arith',
+  '-Wshadow',
+  '-Wshift-negative-value',
+  '-Wstrict-prototypes',
+  '-Wundef',
+  '-Wvla',
+  '-Wno-duplicate-decl-specifier',
+  '-Wno-format-truncation',
+  '-Wno-format-y2k',
+  '-Wno-gnu-variable-sized-type-not-at-end',
+  '-Wno-missing-field-initializers',
+  '-Wno-pragmas',
+  '-Wno-sign-compare',
+  '-Wno-tautological-constant-out-of-range-compare',
+  '-Wno-unknown-pragmas',
+  '-Wno-unused-parameter',
+  '-Wparentheses-equality',
+  '-Wpointer-arith',
+  '-Wshadow',
+  '-Wstrict-prototypes',
+  '-Wtypedef-redefinition',
+  '-Wundef',
+  '-Wunknown-attributes',
+  '-fno-strict-aliasing',
+])
 
-  if cc.has_argument('-Wimplicit-fallthrough')
-    if cc.compiles('''
-                   int main(int argc, char **argv) {
-                       int r = 0;
-                       switch (argc) {
-                       case 0:
-                           r++;
-                           /* fall-through */
-                       case 1:
-                           r++;
-                           break;
-                       }
-                       return r;
-                   }
-                   ''',
-                   args: '-Werror=implicit-fallthrough',
-                   name: '-Werror=implicit-fallthrough')
-      common_flags += '-Wimplicit-fallthrough'
-    endif
+if cc.has_argument('-Wimplicit-fallthrough')
+  if cc.compiles('''
+                 int main(int argc, char **argv) {
+                     int r = 0;
+                     switch (argc) {
+                     case 0:
+                         r++;
+                         /* fall-through */
+                     case 1:
+                         r++;
+                         break;
+                     }
+                     return r;
+                 }
+                 ''',
+                 args: '-Werror=implicit-fallthrough',
+                 name: '-Werror=implicit-fallthrough')
+    common_flags += '-Wimplicit-fallthrough'
   endif
-
 endif
 
 add_project_arguments(common_flags, language: 'c')