diff options
Diffstat (limited to 'gcc/c-cppbuiltin.c')
| -rw-r--r-- | gcc/c-cppbuiltin.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c index 19a9cf48106..739a34224b1 100644 --- a/gcc/c-cppbuiltin.c +++ b/gcc/c-cppbuiltin.c @@ -310,7 +310,23 @@ c_cpp_builtins (cpp_reader *pfile) /* represents the C++ ABI version, always defined so it can be used while preprocessing C and assembler. */ - cpp_define (pfile, "__GXX_ABI_VERSION=102"); + if (flag_abi_version == 0) + /* Use a very large value so that: + + #if __GXX_ABI_VERSION >= <value for version X> + + will work whether the user explicitly says "-fabi-version=x" or + "-fabi-version=0". Do not use INT_MAX because that will be + different from system to system. */ + builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999); + else if (flag_abi_version == 1) + /* Due to an historical accident, this version had the value + "102". */ + builtin_define_with_int_value ("__GXX_ABI_VERSION", 102); + else + /* Newer versions have values 1002, 1003, ... */ + builtin_define_with_int_value ("__GXX_ABI_VERSION", + 1000 + flag_abi_version); /* libgcc needs to know this. */ if (USING_SJLJ_EXCEPTIONS) |