docs/meson: Update notes on using CFLAGS and -Dc_args

v2: - Use ${} to denote variables instead of just $
    - fix spelling error

bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107313
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

diff --git a/docs/meson.html b/docs/meson.html
index ea8fc98598290cc69139616a7495f3683c90e8bd..dcad062c0a1982bd001063750c00b6f57b6ae693 100644 (file)
--- a/docs/meson.html
+++ b/docs/meson.html
@@ -99,29 +99,29 @@ recommended in the documentation</a>
 <dt><code>Environment Variables</code></dt>
 <dd><p>Meson supports the standard CC and CXX environment variables for
 changing the default compiler, and CFLAGS, CXXFLAGS, and LDFLAGS for setting
-options to the compiler and linker.
+options to the compiler and linker during the initial configuration.
 
-The default compilers depends on your operating system. Meson supports most of
-the popular compilers, a complete list is available
-<a href="http://mesonbuild.com/Reference-tables.html#compiler-ids">here</a>.
-
-These arguments are consumed and stored by meson when it is initialized or
-re-initialized. Therefore passing them to meson configure will not do anything,
-and passing them to ninja will only do something if ninja decides to
-re-initialize meson, for example, if a meson.build file has been changed.
-Changing these variables will not cause all targets to be rebuilt, so running
-ninja clean is recommended when changing CFLAGS or CXXFLAGS. Meson will never
-change compiler in a configured build directory.
+These arguments are consumed and stored by meson when it is initialized. To
+change these flags after the build is initialized (or when doing a first
+initialization), consider using <code>-D${lang}_args</code> and
+<code>-D${lang}_link_args</code> instead. Meson will never change compiler in a
+configured build directory.
 </p>
 
 <pre>
     CC=clang CXX=clang++ meson build-clang
     ninja -C build-clang
     ninja -C build-clang clean
-    touch meson.build
-    CFLAGS=-Wno-typedef-redefinition ninja -C build-clang
+    meson configure build -Dc_args="-Wno-typedef-redefinition"
+    ninja -C build-clang
 </pre>
 
+<p>
+The default compilers depends on your operating system. Meson supports most of
+the popular compilers, a complete list is available
+<a href="http://mesonbuild.com/Reference-tables.html#compiler-ids">here</a>.
+</p>
+
 <p>Meson also honors <code>DESTDIR</code> for installs</p>
 </dd>