http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53431
Bug #: 53431
Summary: C++ preprocessor ignores #pragma GCC diagnostic
ignored "-Wundef"
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
The following code:
#pragma GCC diagnostic ignored "-Wundef"
#if FOO
#endif
int main (void) { return 42; }
compiled with
g++ -o test test.c -Wundef -Werror
gives:
test.c:2:5: error: "FOO" is not defined [-Werror=undef]
cc1plus: all warnings being treated as errors
On the contrary
gcc -o test test.c -Wundef -Werror
does not give any error
gcc version is
gcc (Debian 4.7.0-8) 4.7.0
