meson: backport fix for builds with -Werror=return-type

(From OE-Core rev: de623085039111d9988918ae95e07e48108a9ff1)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 101 insertions, 0 deletions

diff --git a/meta/recipes-devtools/meson/meson.inc b/meta/recipes-devtools/meson/meson.inc
index 662368e219..14e5f8a610 100644
--- a/meta/recipes-devtools/meson/meson.inc
+++ b/meta/recipes-devtools/meson/meson.inc
@@ -16,6 +16,7 @@ SRC_URI = "https://github.com/mesonbuild/meson/releases/download/${PV}/meson-${P
            file://0001-mesonbuild-environment.py-check-environment-for-vari.patch \
            file://0001-modules-python.py-do-not-substitute-python-s-install.patch \
            file://vala-cross-compile.patch \
+           file://0001-Fix-missing-return-statements-that-are-seen-with-Wer.patch \
            "
 SRC_URI[sha256sum] = "f27b7a60f339ba66fe4b8f81f0d1072e090a08eabbd6aa287683b2c2b9dd2d82"
 SRC_URI[md5sum] = "48787e391ec5c052799a3dd491f73909"
diff --git a/meta/recipes-devtools/meson/meson/0001-Fix-missing-return-statements-that-are-seen-with-Wer.patch b/meta/recipes-devtools/meson/meson/0001-Fix-missing-return-statements-that-are-seen-with-Wer.patch
new file mode 100644
index 0000000000..16c6d90761
--- /dev/null
+++ b/meta/recipes-devtools/meson/meson/0001-Fix-missing-return-statements-that-are-seen-with-Wer.patch
@@ -0,0 +1,100 @@
+From 15f44be1c7f71cb0a8c6863917acbbc301c621fe Mon Sep 17 00:00:00 2001
+From: Martin Liska <mliska@suse.cz>
+Date: Mon, 15 Jul 2019 10:06:17 +0200
+Subject: [PATCH] Fix missing return statements that are seen with
+ -Werror=return-type.
+
+Error example:
+
+Code:
+
+        #include <locale.h>
+        int main () {
+            /* If it's not defined as a macro, try to use as a symbol */
+            #ifndef LC_MESSAGES
+                LC_MESSAGES;
+            #endif
+        }
+Compiler stdout:
+
+Compiler stderr:
+ In file included from /usr/include/locale.h:25,
+                 from /tmp/tmpep_i4iwg/testfile.c:2:
+/usr/include/features.h:382:4: warning: #warning _FORTIFY_SOURCE
+requires compiling with optimization (-O) [-Wcpp]
+  382 | #  warning _FORTIFY_SOURCE requires compiling with optimization
+(-O)
+      |    ^~~~~~~
+/tmp/tmpep_i4iwg/testfile.c: In function 'main':
+/tmp/tmpep_i4iwg/testfile.c:8:9: error: control reaches end of non-void
+function [-Werror=return-type]
+    8 |         }
+      |         ^
+cc1: some warnings being treated as errors
+
+Upstream-Status: Backport
+Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
+---
+ mesonbuild/compilers/c.py     | 1 +
+ mesonbuild/compilers/clike.py | 5 +++++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/mesonbuild/compilers/c.py b/mesonbuild/compilers/c.py
+index 3b58a076..9ef92077 100644
+--- a/mesonbuild/compilers/c.py
++++ b/mesonbuild/compilers/c.py
+@@ -70,6 +70,7 @@ class CCompiler(CLikeCompiler, Compiler):
+             #ifndef {symbol}
+                 {symbol};
+             #endif
++            return 0;
+         }}'''
+         return self.compiles(t.format(**fargs), env, extra_args=extra_args,
+                              dependencies=dependencies)
+diff --git a/mesonbuild/compilers/clike.py b/mesonbuild/compilers/clike.py
+index 83f67591..f9cbeabd 100644
+--- a/mesonbuild/compilers/clike.py
++++ b/mesonbuild/compilers/clike.py
+@@ -375,6 +375,7 @@ class CLikeCompiler:
+             #ifndef {symbol}
+                 {symbol};
+             #endif
++            return 0;
+         }}'''
+         return self.compiles(t.format(**fargs), env, extra_args=extra_args,
+                              dependencies=dependencies)
+@@ -554,6 +555,7 @@ class CLikeCompiler:
+         {prefix}
+         int main(int argc, char **argv) {{
+             {type} something;
++            return 0;
+         }}'''
+         if not self.compiles(t.format(**fargs), env, extra_args=extra_args,
+                              dependencies=dependencies)[0]:
+@@ -589,6 +591,7 @@ class CLikeCompiler:
+         {prefix}
+         int main(int argc, char **argv) {{
+             {type} something;
++            return 0;
+         }}'''
+         if not self.compiles(t.format(**fargs), env, extra_args=extra_args,
+                              dependencies=dependencies)[0]:
+@@ -667,6 +670,7 @@ class CLikeCompiler:
+         #include <stdio.h>
+         int main(int argc, char *argv[]) {{
+             printf ("{fmt}", {cast} {f}());
++            return 0;
+         }}'''.format(**fargs)
+         res = self.run(code, env, extra_args=extra_args, dependencies=dependencies)
+         if not res.compiled:
+@@ -819,6 +823,7 @@ class CLikeCompiler:
+                 #error "No definition for __builtin_{func} found in the prefix"
+             #endif
+         #endif
++        return 0;
+         }}'''
+         return self.links(t.format(**fargs), env, extra_args=extra_args,
+                           dependencies=dependencies)
+-- 
+2.17.1
+