https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88475
Bug ID: 88475
Summary: -E -fdirectives-only clashes with raw strings
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: thiago at kde dot org
Target Milestone: ---
Source:
$ cat test.cpp
extern const char str[] = R"(
#define FOO 1
#NOSORT
)";
Compiles just fine:
$ g++ -c test.cpp; echo $?
0
Preprocessed output looks correct:
$ g++ -E test.cpp
# 1 "test.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "test.cpp"
extern const char str[] = R"(
#define FOO 1
#NOSORT
)";
But in the presence of -fdirectives-only (which icecream uses), it produces an
error and incorrectly preprocesses:
$ g++ -E -fdirectives-only test.cpp | tail -5
test.cpp:3:2: error: invalid preprocessing directive #NOSORT
#NOSORT
^~~~~~
# 1 "test.cpp"
extern const char str[] = R"(
#define FOO 1
)";
According to strace, cc1plus is the preprocessor, not /lib/cpp.
