abseil-cpp: add recipe for git version

The repository contains the Abseil C++ library code. Abseil is an
open-source collection of C++ code (compliant to C++11) designed to
augment the C++ standard library.

https://github.com/abseil/abseil-cpp

Signed-off-by: Changyu Li <Changyu.Li@microsoft.com>
Signed-off-by: Sinan Kaya <sinan.kaya@microsoft.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/abseil-cpp/abseil-cpp/0001-Remove-maes-option-from-cross-compilation.patch

@@ -0,0 +1,53 @@
+From 70926666f7c5c35add363e3bcade6eaabace7206 Mon Sep 17 00:00:00 2001
+From: Sinan Kaya <sinan.kaya@microsoft.com>
+Date: Mon, 3 Feb 2020 03:25:57 +0000
+Subject: [PATCH] Remove maes option from cross-compilation
+
+---
+ absl/copts/GENERATED_AbseilCopts.cmake | 4 ----
+ absl/copts/GENERATED_copts.bzl         | 4 ----
+ absl/copts/copts.py                    | 4 ----
+ 3 files changed, 12 deletions(-)
+
+diff --git a/absl/copts/GENERATED_AbseilCopts.cmake b/absl/copts/GENERATED_AbseilCopts.cmake
+index 01bd40b..af99694 100644
+--- a/absl/copts/GENERATED_AbseilCopts.cmake
++++ b/absl/copts/GENERATED_AbseilCopts.cmake
+@@ -230,7 +230,3 @@ list(APPEND ABSL_RANDOM_HWAES_MSVC_X64_FLAGS
+     "/Ob2"
+ )
+ 
+-list(APPEND ABSL_RANDOM_HWAES_X64_FLAGS
+-    "-maes"
+-    "-msse4.1"
+-)
+diff --git a/absl/copts/GENERATED_copts.bzl b/absl/copts/GENERATED_copts.bzl
+index 82f332f..9a548d1 100644
+--- a/absl/copts/GENERATED_copts.bzl
++++ b/absl/copts/GENERATED_copts.bzl
+@@ -231,7 +231,3 @@ ABSL_RANDOM_HWAES_MSVC_X64_FLAGS = [
+     "/Ob2",
+ ]
+ 
+-ABSL_RANDOM_HWAES_X64_FLAGS = [
+-    "-maes",
+-    "-msse4.1",
+-]
+diff --git a/absl/copts/copts.py b/absl/copts/copts.py
+index 068abce..c2f70fb 100644
+--- a/absl/copts/copts.py
++++ b/absl/copts/copts.py
+@@ -203,10 +203,6 @@ COPT_VARS = {
+     # to improve performance of some random bit generators.
+     "ABSL_RANDOM_HWAES_ARM64_FLAGS": ["-march=armv8-a+crypto"],
+     "ABSL_RANDOM_HWAES_ARM32_FLAGS": ["-mfpu=neon"],
+-    "ABSL_RANDOM_HWAES_X64_FLAGS": [
+-        "-maes",
+-        "-msse4.1",
+-    ],
+     "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS": [
+         "/O2",  # Maximize speed
+         "/Ob2",  # Aggressive inlining
+-- 
+2.23.0
+

meta-oe/recipes-devtools/abseil-cpp/abseil-cpp/0002-Add-forgotten-ABSL_HAVE_VDSO_SUPPORT-conditional.patch

@@ -0,0 +1,35 @@
+From 9384735383a0b8688e3f05ed23a53f18863eae20 Mon Sep 17 00:00:00 2001
+From: Sinan Kaya <sinan.kaya@microsoft.com>
+Date: Tue, 11 Feb 2020 11:36:00 -0500
+Subject: [PATCH] Add forgotten ABSL_HAVE_VDSO_SUPPORT conditional
+
+Signed-off-by: Sinan Kaya <sinan.kaya@microsoft.com>
+---
+ absl/debugging/internal/stacktrace_x86-inl.inc | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/absl/debugging/internal/stacktrace_x86-inl.inc b/absl/debugging/internal/stacktrace_x86-inl.inc
+index ff0fd31..28607c3 100644
+--- a/absl/debugging/internal/stacktrace_x86-inl.inc
++++ b/absl/debugging/internal/stacktrace_x86-inl.inc
+@@ -171,6 +171,7 @@ static void **NextStackFrame(void **old_fp, const void *uc) {
+     static const unsigned char *kernel_rt_sigreturn_address = nullptr;
+     static const unsigned char *kernel_vsyscall_address = nullptr;
+     if (num_push_instructions == -1) {
++#ifdef ABSL_HAVE_VDSO_SUPPORT
+       absl::debugging_internal::VDSOSupport vdso;
+       if (vdso.IsPresent()) {
+         absl::debugging_internal::VDSOSupport::SymbolInfo
+@@ -199,6 +200,9 @@ static void **NextStackFrame(void **old_fp, const void *uc) {
+       } else {
+         num_push_instructions = 0;
+       }
++#else
++      num_push_instructions = 0;
++#endif
+     }
+     if (num_push_instructions != 0 && kernel_rt_sigreturn_address != nullptr &&
+         old_fp[1] == kernel_rt_sigreturn_address) {
+-- 
+2.20.1.windows.1
+

meta-oe/recipes-devtools/abseil-cpp/abseil-cpp/0003-Add-fPIC-option.patch

@@ -0,0 +1,27 @@
+From d7160d647c8f8847f3ea8d7b0eb222936962c1af Mon Sep 17 00:00:00 2001
+From: Sinan Kaya <sinan.kaya@microsoft.com>
+Date: Tue, 11 Feb 2020 11:58:02 -0500
+Subject: [PATCH] Add fPIC option
+
+Signed-off-by: Sinan Kaya <sinan.kaya@microsoft.com>
+---
+ CMakeLists.txt | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 74a3a4c..4f837b3 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -79,6 +79,9 @@ option(ABSL_USE_GOOGLETEST_HEAD
+ 
+ option(ABSL_RUN_TESTS "If ON, Abseil tests will be run." OFF)
+ 
++# link fails on arm64 and x86-64 without this
++add_compile_options(-fPIC)
++
+ if(${ABSL_RUN_TESTS})
+   # enable CTest.  This will set BUILD_TESTING to ON unless otherwise specified
+   # on the command line
+-- 
+2.20.1.windows.1
+

meta-oe/recipes-devtools/abseil-cpp/abseil-cpp_git.bb

@@ -0,0 +1,52 @@
+SUMMARY = "Abseil is a cpp library like STL"
+DESCRIPTION = "Abseil provides pieces missing from the C++ standard. Contains \
+additional useful libraries like algorithm, container, debugging, hash, memory, \
+meta, numeric, strings, synchronization, time, types and utility"
+HOMEPAGE = "https://abseil.io/"
+SECTION = "libs"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=df52c6edb7adc22e533b2bacc3bd3915"
+
+SRCREV = "aa844899c937bde5d2b24f276b59997e5b668bde"
+BRANCH = "lts_2019_08_08"
+SRC_URI = "git://github.com/abseil/abseil-cpp;branch=${BRANCH}                \
+           file://0001-Remove-maes-option-from-cross-compilation.patch        \
+           file://0002-Add-forgotten-ABSL_HAVE_VDSO_SUPPORT-conditional.patch \
+           file://0003-Add-fPIC-option.patch                                  \
+          "
+
+S = "${WORKDIR}/git"
+
+ASNEEDED_class-native = ""
+ASNEEDED_class-nativesdk = ""
+
+inherit cmake
+
+BBCLASSEXTEND = "native nativesdk"
+ALLOW_EMPTY_${PN} = "1"
+
+python () {
+    arch = d.getVar("TARGET_ARCH")
+
+    if arch == "aarch64":
+        tunes = d.getVar("TUNE_FEATURES")
+        if not tunes:
+            raise bb.parse.SkipPackage("%s-%s Needs support for crypto on armv8" % (pkgn, pkgv))
+            return
+        pkgn = d.getVar("PN")
+        pkgv = d.getVar("PV")
+        if "crypto" not in tunes:
+            raise bb.parse.SkipPackage("%s-%s Needs support for crypto on armv8" % (pkgn, pkgv))
+
+    if arch == "x86_64":
+        tunes = d.getVar("TUNE_FEATURES")
+        if not tunes:
+           raise bb.parse.SkipPackage("%s-%s Needs support for corei7 on x86_64" % (pkgn, pkgv))
+           return
+        pkgn = d.getVar("PN")
+        pkgv = d.getVar("PV")
+        if "corei7" not in tunes:
+            raise bb.parse.SkipPackage("%s-%s Needs support for corei7 on x86_64" % (pkgn, pkgv))
+
+}
+