https://llvm.org/bugs/show_bug.cgi?id=25508
Bug ID: 25508
Summary: Incorrect __USER_LABEL_PREFIX__ for the triple
arm-none-*eabi*
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: oliv...@labapart.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Symbols are not prefixed by '_' (ie: __USER_LABEL_PREFIX__ = '_') for ARM EABI.
>From the document 'ELF for ARM architecture document', 4.5.4 Symbol names
A symbol that names a C or assembly language entity should have the name of
that entity. For example, a C function called calculate generates a symbol
called calculate (not _calculate).
See
http://infocenter.arm.com/help/topic/com.arm.doc.ihi0044e/IHI0044E_aaelf.pdf
Linux system returns the correct __USER_LABEL_PREFIX__:
$ clang-3.8 -E -dM -ffreestanding -target arm-linux-eabi - < /dev/null | grep
__USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__
$ clang-3.8 -E -dM -ffreestanding -target arm-linux-gnueabihf - < /dev/null |
grep __USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__
while the 'none' system returns '_':
$ clang-3.8 -E -dM -ffreestanding -target arm-none-eabi - < /dev/null | grep
__USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__ _
$ clang-3.8 -E -dM -ffreestanding -target arm-none-gnueabihf - < /dev/null |
grep __USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__ _
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