[PATCH v4] sanity: test for c toolchain

[Christos Gavros <gavrosc@yahoo.com>]

Users reported issues caused by missing the right libstdc++-version-dev.
A new function 'check_c_toolchain' added in sanity.bbclass to test linking libstdc++
Fixes [YOCTO #15712]

Signed-off-by: Christos Gavros <gavrosc@yahoo.com>
Reviewed-by: Yoann Congal <yoann.congal@smile.fr>
---
v3->v4
* move new function call in 'check_sanity_version_change()'
---
 meta/classes-global/sanity.bbclass | 40 ++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/meta/classes-global/sanity.bbclass b/meta/classes-global/sanity.bbclass
index 7b8a497d5a..26ce5fbc09 100644
--- a/meta/classes-global/sanity.bbclass
+++ b/meta/classes-global/sanity.bbclass
@@ -602,6 +602,43 @@ def drop_v14_cross_builds(d):
                 bb.utils.remove(stamp + "*")
                 bb.utils.remove(workdir, recurse = True)
 
+def check_c_toolchain(d):
+    """
+    it checks if the c compiling and linking to libstdc++ works properly in the native system
+    """
+    import os
+    import subprocess
+    from tempfile import NamedTemporaryFile
+
+    try:
+        with NamedTemporaryFile(delete=False, suffix=".c") as c_file:
+            c_code = """
+            #include <stdio.h>
+            int main() {
+                printf(\"Hello, World!\\n\");
+                return 0;
+            }
+            """
+            c_file.write(c_code.encode('utf-8'))
+            c_file_name = c_file.name
+
+        build_cc = d.getVar('BUILD_CC').strip()
+        output_binary = c_file_name + ".out"
+        compile_command = [build_cc, c_file_name, '-o', output_binary,'-lstdc++']
+        result = subprocess.run(compile_command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+        if result.returncode == 0:
+            return None
+        else:
+            return f"C toolchain check failed to link against libstdc++. Please ensure libstdc++ and headers are installed. Error:\n{result.stderr.decode()}"
+    except Exception as e:
+        return f"An unexpected issue occurred during the C toolchain check: {str(e)}"
+    finally:
+        if c_file_name and os.path.exists(c_file_name):
+            os.remove(c_file_name)
+        if output_binary and os.path.exists(output_binary):
+            os.remove(output_binary)
+
 def sanity_handle_abichanges(status, d):
     #
     # Check the 'ABI' of TMPDIR
@@ -770,6 +807,9 @@ def check_sanity_version_change(status, d):
     # macOS with default HFS+ file system)
     status.addresult(check_case_sensitive(tmpdir, "TMPDIR"))
 
+    # Check if linking with lstdc++ is failing
+    status.addresult(check_c_toolchain(d))
+
 def sanity_check_locale(d):
     """
     Currently bitbake switches locale to en_US.UTF-8 so check that this locale actually exists.
-- 
2.34.1