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help / color / mirror / Atom feedFrom: Bertrand Drouvot <[email protected]>
Subject: [PATCH v1] meson: error about unsupported user-supplied c_args before C11 check
Date: Wed, 18 Mar 2026 05:53:12 +0000
When using clang, meson injects -Werror=unknown-warning-option into cc.compiles()
calls. A user-supplied c_args flag unsupported by clang therefore causes the C11
check to fail with the misleading error "C compiler does not support C11".
This commit adds a cc.has_multi_arguments() check before the C11 test to catch
unsupported c_args early.
---
meson.build | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/meson.build b/meson.build
index 46bd6b1468a..aadaf706e2e 100644
--- a/meson.build
+++ b/meson.build
@@ -620,6 +620,15 @@ dir_doc_extension = dir_doc / 'extension'
# used, they need to be added to test_c_args as well.
###############################################################
+# Validate user-supplied c_args early: when using clang, meson injects
+# -Werror=unknown-warning-option into cc.compiles(), so an unsupported
+# flag would cause the C11 check below to fail with a misleading error.
+if not cc.has_multi_arguments(get_option('c_args'))
+ error('One or more c_args are not supported by @0@ @1@'.format(
+ cc.get_id(),
+ cc.version()))
+endif
+
# Do we need an option to enable C11?
c11_test = '''
#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
--
2.34.1
--tHmfn+rjbozXnl3O--
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Subject: Re: [PATCH v1] meson: error about unsupported user-supplied c_args before C11 check
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