Thread: C preprocessor and C continuation character \

this query find out if change intentional, or if unlikely bug.

if have file, foo.dat:

code:

hello \  world

and run through c preprocessor, see difference between output on lucid , natty.

on lucid, running command:

code:

cc -e -x c foo.dat

the output is:

code:

# 1 "foo.dat"  # 1 "<built-in>"  # 1 "<command-line>"  # 1 "foo.dat"  hello world

however, on natty, output is:

code:

# 1 "foo.dat"  # 1 "<built-in>"  # 1 "<command-line>"  # 1 "foo.dat"  hello  world

i'd know:
1) intentional change or bug?
2) can fix new command option?

in advance.

mm

posted mr_mop

this query find out if change intentional, or if unlikely bug.

if have file, foo.dat:

code:

hello \  world

and run through c preprocessor, see difference between output on lucid , natty.

on lucid, running command:

code:

cc -e -x c foo.dat

the output is:

code:

# 1 "foo.dat"  # 1 "<built-in>"  # 1 "<command-line>"  # 1 "foo.dat"  hello world

however, on natty, output is:

code:

# 1 "foo.dat"  # 1 "<built-in>"  # 1 "<command-line>"  # 1 "foo.dat"  hello  world

i'd know:
1) intentional change or bug?
2) can fix new command option?

in advance.

mm

does apply macros too? happens input this:

code:

#define foo \   b    foo

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