[Bug macros/9748] macros containing __extension__ won't run

["tromey at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From tromey at redhat dot com  2009-01-16 00:05 -------
Occasionally I fantasize about putting the GCC (or clang) parsers into
gdb and having a C interpreter environment.

For the specific case of gcc, I put this into the incremental branch's
gcc/gdbinit.in:

# Redefine any macro from tree.h that uses a statement expression.
# Last in case of failure.
macro define TREE_CHECK(T, CODE) (T)
macro define TREE_NOT_CHECK(T, CODE) (T)
macro define TREE_CHECK2(T, CODE1, CODE2) (T)
macro define TREE_NOT_CHECK2(T, CODE1, CODE2) (T)
macro define TREE_CHECK3(T, CODE1, CODE2, CODE3) (T)
macro define TREE_NOT_CHECK3(T, CODE1, CODE2, CODE3) (T)
macro define TREE_CHECK4(T, CODE1, CODE2, CODE3, CODE4) (T)
macro define NON_TREE_CHECK4(T, CODE1, CODE2, CODE3, CODE4) (T)
macro define TREE_CHECK5(T, CODE1, CODE2, CODE3, CODE4, CODE5) (T)
macro define TREE_NOT_CHECK5(T, CODE1, CODE2, CODE3, CODE4, CODE5) (T)
macro define CONTAINS_STRUCT_CHECK(T, STRUCT) (T)
macro define TREE_CLASS_CHECK(T, CLASS) (T)
macro define TREE_RANGE_CHECK(T, CODE1, CODE2) (T)
macro define OMP_CLAUSE_SUBCODE_CHECK(T, CODE) (T)
macro define OMP_CLAUSE_RANGE_CHECK(T, CODE1, CODE2) (T)
macro define EXPR_CHECK(T) (T)
macro define GIMPLE_STMT_CHECK(T) (T)
macro define NON_TYPE_CHECK(T) (T)
macro define TREE_VEC_ELT_CHECK(T, I) ((T)->vec.a[I])
macro define PHI_NODE_ELT_CHECK(T, I) ((T)->phi.a[I])
macro define OMP_CLAUSE_ELT_CHECK(T, I) ((T)->omp_clause.ops[I])
macro define TREE_OPERAND_CHECK(T, I) ((T)->exp.operands[I])
macro define TREE_OPERAND_CHECK_CODE(T, CODE, I) ((T)->exp.operands[I])
macro define GIMPLE_STMT_OPERAND_CHECK(T, I) ((T)->gstmt.operands[I])
macro define TREE_RTL_OPERAND_CHECK(T, CODE, I) ((T)->exp.operands[I])
macro define TREE_CHAIN(NODE) ((T)->common.chain)
macro define TREE_TYPE(NODE) ((T)->common.type)
# Another handy one.
macro define __builtin_offsetof(T, F) ((int) &(((T *) 0)->F))


In fact, this is why I implemented "macro define" :-)
Perhaps this should go on gcc trunk at some point.

Defining __extension__ wouldn't be completely crazy.
Maybe we need "set lang gnuc".

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=9748

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.