https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67266
Bug ID: 67266
Summary: Use of "cpp -P ..." collapses multiple blank lines
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: mike at flyn dot org
Target Milestone: ---
I am using:
cpp -C -P -nostdinc -std=c99 -Werror
to process something that is not C. Everything works, except that one side
effect of "-P" is that consecutive newlines are compressed into one.
For example,
$ cpp -P
x
x
outputs
x
x
I have not found documentation of this behavior. My hunch is that -P should not
behave this way because the man page states, "this might be useful when running
the preprocessor on something that is not C code." I would think that users
employing cpp to process non-C would expect newlines to be preserved.
I previously brought this up on the GCC mailing list. See
https://gcc.gnu.org/ml/gcc-help/2015-08/msg00069.html.
