diff mbox series

c++: Fall back to global cpp spec if CPLUSPLUS_CPP_SPEC is not defined

Message ID 20221128140251.4076484-1-joakim@nohlgard.se
State New
Headers
Series c++: Fall back to global cpp spec if CPLUSPLUS_CPP_SPEC is not defined |

Commit Message

Joakim Nohlgård Nov. 28, 2022, 2:02 p.m. UTC 
  When CPLUSPLUS_CPP_SPEC is set to a string literal it is not possible to
modify it through external spec files by renaming the original cpp spec
and replacing it because the compiler cpp_spec will still point to the
original, renamed cpp spec. Not defining CPLUSPLUS_CPP_SPEC makes gcc.cc
fall back to using the same cpp spec as the C compiler when substituting
%C in spec strings.

gcc/ChangeLog:

	* defaults.h (CPLUSPLUS_CPP_SPEC): Remove default definition.

Signed-off-by: Joakim Nohlgård <joakim@nohlgard.se>
---
 gcc/defaults.h | 8 --------
 1 file changed, 8 deletions(-)
diff mbox series

Patch

diff --git a/gcc/defaults.h b/gcc/defaults.h
index 376687d91b1..223460ef239 100644
--- a/gcc/defaults.h
+++ b/gcc/defaults.h
@@ -783,14 +783,6 @@  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #endif
 #endif
 
-/* By default, the preprocessor should be invoked the same way in C++
-   as in C.  */
-#ifndef CPLUSPLUS_CPP_SPEC
-#ifdef CPP_SPEC
-#define CPLUSPLUS_CPP_SPEC CPP_SPEC
-#endif
-#endif
-
 #ifndef ACCUMULATE_OUTGOING_ARGS
 #define ACCUMULATE_OUTGOING_ARGS 0
 #endif