diff options
| author | Shoaib Meenai <smeenai@fb.com> | 2017-10-04 23:17:12 +0000 |
|---|---|---|
| committer | Shoaib Meenai <smeenai@fb.com> | 2017-10-04 23:17:12 +0000 |
| commit | ecb0b2971a09c8983d8ba3a5e60659a81dcf6cf5 (patch) | |
| tree | 385b0d67daaaf75214b59a5ab79cd715fd689453 /libcxx/docs | |
| parent | 1712f582b28af63191234b0cfc847f60278b0219 (diff) | |
[libc++] Add site config option for ABI macros
Some ABI macros affect headers, so it's nice to have a site config
option for them. Add a LIBCXX_ABI_DEFINES cmake macro to allow
specifying a list of ABI macros to define in the site config.
The primary design constraint (as discussed with Eric on IRC a while
back) was to not have to repeat the ABI macro names in cmake, which only
leaves a free-form cmake list as an option. A somewhat unfortunate
consequence is that we can't verify that the ABI macros being defined
actually exist, though we can at least perform some basic sanity
checking, since all the ABI macros begin with _LIBCPP_ABI_.
Differential Revision: https://reviews.llvm.org/D36719
Diffstat (limited to 'libcxx/docs')
| -rw-r--r-- | libcxx/docs/BuildingLibcxx.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libcxx/docs/BuildingLibcxx.rst b/libcxx/docs/BuildingLibcxx.rst index 81a7c234147..d983bbdfd0e 100644 --- a/libcxx/docs/BuildingLibcxx.rst +++ b/libcxx/docs/BuildingLibcxx.rst @@ -347,6 +347,13 @@ The following options allow building libc++ for a different ABI version. Build the "unstable" ABI version of libc++. Includes all ABI changing features on top of the current stable version. +.. option:: LIBCXX_ABI_DEFINES:STRING + + **Default**: ``""`` + + A semicolon-separated list of ABI macros to persist in the site config header. + See ``include/__config`` for the list of ABI macros. + .. _LLVM-specific variables: LLVM-specific options |