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| author | Rosen Penev <rosenp@gmail.com> | 2019-12-31 19:37:35 -0800 |
|---|---|---|
| committer | Jo-Philipp Wich <jo@mein.io> | 2020-01-01 16:59:32 +0100 |
| commit | 9f7d36d1a995c03a8eaccf10f06f57332bc5c1c0 (patch) | |
| tree | 24158b4610333700608b0b1ddb37b4e711573ce8 /package | |
| parent | 1f8ab1c6406451641c05e8cb1e72f7c173a114a3 (diff) | |
| download | upstream-9f7d36d1a995c03a8eaccf10f06f57332bc5c1c0.tar.gz upstream-9f7d36d1a995c03a8eaccf10f06f57332bc5c1c0.tar.bz2 upstream-9f7d36d1a995c03a8eaccf10f06f57332bc5c1c0.zip | |
libcxx: Add size optimizations
Changed standard to 2a. 2a (as well as 17) contain more constexpr
functions, which are evaluated at compile time. This saves space.
Added --gc-sections. With the CXXABI change, this now makes the package
smaller.
With these, size went down to 210845 on mipsel_24kc.
Also fixed two small compiler warnings. No real change in behavior.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Diffstat (limited to 'package')
| -rw-r--r-- | package/libs/libcxx/Makefile | 2 | ||||
| -rw-r--r-- | package/libs/libcxx/patches/010-cxx17.patch | 14 | ||||
| -rw-r--r-- | package/libs/libcxx/patches/020-fixes.patch | 24 |
3 files changed, 39 insertions, 1 deletions
diff --git a/package/libs/libcxx/Makefile b/package/libs/libcxx/Makefile index 60978bdc31..1d8e502221 100644 --- a/package/libs/libcxx/Makefile +++ b/package/libs/libcxx/Makefile @@ -47,7 +47,7 @@ CMAKE_OPTIONS += \ -DLIBCXX_HAS_MUSL_LIBC=$(if $(CONFIG_USE_MUSL),ON,OFF) TARGET_CXXFLAGS += -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -Wno-attributes -flto -TARGET_LDFLAGS += -Wl,--as-needed +TARGET_LDFLAGS += -Wl,--gc-sections,--as-needed -flto=jobserver define Build/InstallDev $(call Build/InstallDev/cmake,$(1)) diff --git a/package/libs/libcxx/patches/010-cxx17.patch b/package/libs/libcxx/patches/010-cxx17.patch new file mode 100644 index 0000000000..c313c47611 --- /dev/null +++ b/package/libs/libcxx/patches/010-cxx17.patch @@ -0,0 +1,14 @@ +--- a/CMakeLists.txt ++++ b/CMakeLists.txt +@@ -524,9 +524,9 @@ remove_flags(-Wno-pedantic -pedantic-errors -pedantic) + if (LIBCXX_HAS_MUSL_LIBC OR LIBCXX_TARGETING_CLANG_CL) + # musl's pthread implementations uses volatile types in their structs which is + # not a constexpr in C++11 but is in C++14, so we use C++14 with musl. +- set(LIBCXX_STANDARD_VER c++14 CACHE STRING "internal option to change build dialect") ++ set(LIBCXX_STANDARD_VER c++2a CACHE STRING "internal option to change build dialect") + else() +- set(LIBCXX_STANDARD_VER c++11 CACHE STRING "internal option to change build dialect") ++ set(LIBCXX_STANDARD_VER c++2a CACHE STRING "internal option to change build dialect") + endif() + add_compile_flags_if_supported(-std=${LIBCXX_STANDARD_VER}) + add_compile_flags_if_supported("/std:${LIBCXX_STANDARD_VER}") diff --git a/package/libs/libcxx/patches/020-fixes.patch b/package/libs/libcxx/patches/020-fixes.patch new file mode 100644 index 0000000000..abc630d42f --- /dev/null +++ b/package/libs/libcxx/patches/020-fixes.patch @@ -0,0 +1,24 @@ +--- a/include/memory ++++ b/include/memory +@@ -1696,7 +1696,7 @@ struct _LIBCPP_TEMPLATE_VIS allocator_traits + ptrdiff_t _Np = __end1 - __begin1; + __end2 -= _Np; + if (_Np > 0) +- _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); ++ __end2 = __begin1; + } + + private: +--- a/src/filesystem/filesystem_common.h ++++ b/src/filesystem/filesystem_common.h +@@ -197,8 +197,8 @@ private: + using chrono::duration; + using chrono::duration_cast; + +-using TimeSpec = struct ::timespec; +-using StatT = struct ::stat; ++using TimeSpec = struct timespec; ++using StatT = struct stat; + + template <class FileTimeT, class TimeT, + bool IsFloat = is_floating_point<typename FileTimeT::rep>::value> |