http://llvm.org/bugs/show_bug.cgi?id=13796
Bug #: 13796
Summary: Missing __ARM_PCS_VFP symbol on arm hard-float system
causes error
Product: clang
Version: 3.1
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
On any hard-float system, when I install both gcc and clang on an Arch ARM
Linux system, clang won't work because /usr/include/gnu/stubs-soft.h is
missing.
```
clang -mfpu=vfp -mfloat-abi=hard test.c
In file included from test.c:1:
In file included from /usr/include/stdio.h:27:
In file included from /usr/include/features.h:399:
/usr/include/gnu/stubs.h:7:11: fatal error: 'gnu/stubs-soft.h' file not found
# include <gnu/stubs-soft.h>
^
1 error generated.
```
/usr/include/gnu/stubs-hard.h is installed because we are on a hard-float
system, but /usr/include/gnu/stubs.h has the following compile time macro
```
#if !defined __ARM_PCS_VFP
# include <gnu/stubs-soft.h>
#endif
#if defined __ARM_PCS_VFP
# include <gnu/stubs-hard.h>
#endif
```
__ARM_PCS_VFP must not be defined under clang, because compiling with clang
fails when it can't find stubs-soft.h.
I work around the issue by doing the following, which appears to do no harm.
```
ln -s /usr/include/gnu/stubs-hard.h /usr/include/gnu/stubs-soft.h
```
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