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- Log -----------------------------------------------------------------
commit 9ce6b0898e5c0b2d6b6928b93b18137fecd6a32d
Author: Antonio Borneo <bor...@gm...>
Date: Sun Mar 19 10:57:04 2023 +0100
helper/compiler: fix build on MacOS
On MacOS, clang defines [1]:
#define __nonnull _Nonnull
that creates incompatibility with GCC and with the macro __nonnull
defined in some libc.
Detect clang on MacOS and undefine __nonnull.
Change-Id: I64fcf51b102ea91c196e657debd8c267943a2b08
Signed-off-by: Antonio Borneo <bor...@gm...>
Links: [1] https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0/clang/lib/Frontend/InitPreprocessor.cpp#L1226
Reviewed-on: https://review.openocd.org/c/openocd/+/7544
Tested-by: jenkins
diff --git a/src/helper/compiler.h b/src/helper/compiler.h
index 8f6c09950..33a075d64 100644
--- a/src/helper/compiler.h
+++ b/src/helper/compiler.h
@@ -32,7 +32,15 @@
/*
* The __nonnull function attribute marks pointer parameters that
* must not be NULL.
+ *
+ * clang for Apple defines
+ * #define __nonnull _Nonnull
+ * that is a per argument attribute, incompatible with the gcc per function attribute __nonnull__.
+ * Undefine it to keep compatibility among compilers.
*/
+#if defined(__clang__) && defined(__APPLE__)
+# undef __nonnull
+#endif
#ifndef __nonnull
# if __has_attribute(__nonnull__)
# define __nonnull(params) __attribute__ ((__nonnull__ params))
-----------------------------------------------------------------------
Summary of changes:
src/helper/compiler.h | 8 ++++++++
1 file changed, 8 insertions(+)
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