Add a few feature tests to configure.ac because clang does not
understand the following:
- nested functions
- -gstabs option
- loopnel instruction
- addr32 in asm statements
- 'p' constraint in asm statements

Adapt Makefiles accordingly.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13615 a5019735-40e9-0310-863c-91ae7b9d1cf9
5 files changed