libcxx: use libcxxabi.

Fixes #901.

srcpkgs/libcxx/files/libcxx-0001-musl-hacks.patch

@@ -1,35 +1,3 @@
-From b9c1e25e5e60ffd6417a498824349815694a6c45 Mon Sep 17 00:00:00 2001
-From: Travis Tilley <ttilley@gmail.com>
-Date: Sat, 9 May 2015 04:21:27 -0400
-Subject: [PATCH] musl fixes/hacks
-
----
- include/__config |  4 ----
- include/locale   |  7 +++----
- src/locale.cpp   | 16 ++--------------
- 3 files changed, 5 insertions(+), 22 deletions(-)
-
-diff --git a/include/__config b/include/__config
-index 97c66c8..a65e991 100644
---- a/include/__config
-+++ b/include/__config
-@@ -348,14 +348,10 @@ typedef __char32_t char32_t;
- #define _LIBCPP_HAS_QUICK_EXIT
- #elif defined(__linux__)
- #include <features.h>
--#if __GLIBC_PREREQ(2, 15)
- #define _LIBCPP_HAS_QUICK_EXIT
--#endif
--#if __GLIBC_PREREQ(2, 17)
- #define _LIBCPP_HAS_C11_FEATURES
- #endif
- #endif
--#endif
- 
- #if (__has_feature(cxx_noexcept))
- #  define _NOEXCEPT noexcept
-diff --git a/include/locale b/include/locale
-index ca468d5..f3016bb 100644
 --- a/include/locale
 +++ b/include/locale
 @@ -10,7 +10,6 @@
@@ -67,15 +35,13 @@ index ca468d5..f3016bb 100644
          typename remove_reference<decltype(errno)>::type __current_errno = errno;
          if (__current_errno == 0)
              errno = __save_errno;
-diff --git a/src/locale.cpp b/src/locale.cpp
-index 2842bfc..4301b5f 100644
 --- a/src/locale.cpp
 +++ b/src/locale.cpp
 @@ -1010,7 +1010,7 @@ ctype<char>::do_narrow(const char_type* low, const char_type* high, char dfault,
      return low;
  }
  
--#ifdef __EMSCRIPTEN__
+-#if defined(__EMSCRIPTEN__)
 +#ifdef __linux__
  extern "C" const unsigned short ** __ctype_b_loc();
  extern "C" const int ** __ctype_tolower_loc();
@@ -102,6 +68,3 @@ index 2842bfc..4301b5f 100644
  #endif
  }
  #endif
--- 
-2.1.4
-

srcpkgs/libcxx/template

@@ -1,10 +1,14 @@
 # Template file for 'libcxx'
 pkgname=libcxx
 version=3.8.0
-revision=1
+revision=2
 build_style=cmake
 hostmakedepends="cmake"
-makedepends="llvm-libunwind-devel"
+configure_args="-DLIBCXX_CXX_ABI=libcxxabi -DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=ON"
+case "$XBPS_TARGET_MACHINE" in
+	*-musl) configure_args+=" -DLIBCXX_HAS_MUSL_LIBC=YES"
+esac
+makedepends="llvm-libunwind-devel libcxxabi-devel"
 LDFLAGS="-Wl,--no-as-needed -lunwind -Wl,--as-needed"
 make_build_args="VERBOSE=1"
 short_desc="New implementation of the C++ standard library, targeting C++11"
@@ -17,7 +21,9 @@ wrksrc=${pkgname}-${version}.src
 
 post_extract() {
 	case "$XBPS_TARGET_MACHINE" in
-	*-musl) patch -Np1 <${FILESDIR}/libcxx-0001-musl-hacks.patch
+	*-musl)
+		patch -Np1 <${FILESDIR}/libcxx-0001-musl-hacks.patch
+		sed -i 's/!defined(_GCC_MAX_ALIGN_T)/& \&\& !defined(__DEFINED_max_align_t)/' include/stddef.h
 	esac
 }