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Diffstat (limited to 'gcc/doc/extend.texi')
| -rw-r--r-- | gcc/doc/extend.texi | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index fad4d8609af..9a0f04cb0af 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -1224,17 +1224,14 @@ provided as built-in functions by GCC@. GCC can allocate complex automatic variables in a noncontiguous fashion; it's even possible for the real part to be in a register while -the imaginary part is on the stack (or vice-versa). None of the -supported debugging info formats has a way to represent noncontiguous -allocation like this, so GCC describes a noncontiguous complex -variable as if it were two separate variables of noncomplex type. +the imaginary part is on the stack (or vice-versa). Only the DWARF2 +debug info format can represent this, so use of DWARF2 is recommended. +If you are using the stabs debug info format, GCC describes a noncontiguous +complex variable as if it were two separate variables of noncomplex type. If the variable's actual name is @code{foo}, the two fictitious variables are named @code{foo$real} and @code{foo$imag}. You can examine and set these two fictitious variables with your debugger. -A future version of GDB will know how to recognize such pairs and treat -them as a single variable with a complex type. - @node Hex Floats @section Hex Floats @cindex hex floats |