Export of internal Abseil changes

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bc74316103bbda92541896f588f71c9d45bea768 by Gennadiy Civil <misterg@google.com>:

Manually fixing the BUILD.bazel files

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d41bf9ea916a0dc8c69e6ba77f58f9d55649880e by Shaindel Schwartz <shaindel@google.com>:

Minor cleanup to miscellaneous BUILD files.

PiperOrigin-RevId: 266420157

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08a8dc2cbd48d27e1115809f9ca8d178551cd66e by Gennadiy Civil <misterg@google.com>:

Internal Change
BEGIN_PUBLIC
Internal Change
END_PUBLIC

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8617d58fde1ece40e4aa79eaa5e250b42d19835f by Shaindel Schwartz <shaindel@google.com>:

Internal Change
BEGIN_PUBLIC
Internal Change
END_PUBLIC

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3a0fc7d48bdc70c4f7dffc219578693dea84eb2d by Derek Mauro <dmauro@google.com>:

Implement absl::string_view::at()

PiperOrigin-RevId: 266024644

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ba53a9da8ede8fe7b8971eaab6b3a1fa34763ff6 by Andy Soffer <asoffer@google.com>:

Remove forcing of optimization levels in MSVC.

PiperOrigin-RevId: 265927588

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df86f2046b54bba7da2e345040806d43470de5c0 by Shaindel Schwartz <shaindel@google.com>:

Internal change

PiperOrigin-RevId: 265811077

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e2e3a6e8194363e7c6377672560c806d638a7c74 by Derek Mauro <dmauro@google.com>:

Remove ABI unsafe mixed exceptions mode compilation.
Testing will now be done on CI with the exceptions flag set globally.

PiperOrigin-RevId: 265796079
GitOrigin-RevId: bc74316103bbda92541896f588f71c9d45bea768
Change-Id: Ibccd00f4829520454aa55c4f55c7cb2dc9c6b65a

5 files changed, 1 insertions, 81 deletions

diff --git a/absl/copts/AbseilConfigureCopts.cmake b/absl/copts/AbseilConfigureCopts.cmake
index 4ece4c6..b430873 100644
--- a/absl/copts/AbseilConfigureCopts.cmake
+++ b/absl/copts/AbseilConfigureCopts.cmake
@@ -8,7 +8,6 @@ set(ABSL_DEFAULT_LINKOPTS "")
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   set(ABSL_DEFAULT_COPTS "${ABSL_GCC_FLAGS}")
   set(ABSL_TEST_COPTS "${ABSL_GCC_FLAGS};${ABSL_GCC_TEST_FLAGS}")
-  set(ABSL_EXCEPTIONS_FLAG "${ABSL_GCC_EXCEPTIONS_FLAGS}")
   set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_X64_FLAGS}")
 elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   # MATCHES so we get both Clang and AppleClang
@@ -16,13 +15,11 @@ elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
     # clang-cl is half MSVC, half LLVM
     set(ABSL_DEFAULT_COPTS "${ABSL_CLANG_CL_FLAGS}")
     set(ABSL_TEST_COPTS "${ABSL_CLANG_CL_FLAGS};${ABSL_CLANG_CL_TEST_FLAGS}")
-    set(ABSL_EXCEPTIONS_FLAG "${ABSL_CLANG_CL_EXCEPTIONS_FLAGS}")
     set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
     set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_MSVC_X64_FLAGS}")
   else()
     set(ABSL_DEFAULT_COPTS "${ABSL_LLVM_FLAGS}")
     set(ABSL_TEST_COPTS "${ABSL_LLVM_FLAGS};${ABSL_LLVM_TEST_FLAGS}")
-    set(ABSL_EXCEPTIONS_FLAG "${ABSL_LLVM_EXCEPTIONS_FLAGS}")
     set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_X64_FLAGS}")
     if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
       # AppleClang doesn't have lsan
@@ -36,20 +33,15 @@ elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
 elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
   set(ABSL_DEFAULT_COPTS "${ABSL_MSVC_FLAGS}")
   set(ABSL_TEST_COPTS "${ABSL_MSVC_FLAGS};${ABSL_MSVC_TEST_FLAGS}")
-  set(ABSL_EXCEPTIONS_FLAG "${ABSL_MSVC_EXCEPTIONS_FLAGS}")
   set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
   set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_MSVC_X64_FLAGS}")
 else()
   message(WARNING "Unknown compiler: ${CMAKE_CXX_COMPILER}.  Building with no default flags")
   set(ABSL_DEFAULT_COPTS "")
   set(ABSL_TEST_COPTS "")
-  set(ABSL_EXCEPTIONS_FLAG "")
   set(ABSL_RANDOM_RANDEN_COPTS "")
 endif()
 
-# This flag is used internally for Bazel builds and is kept here for consistency
-set(ABSL_EXCEPTIONS_FLAG_LINKOPTS "")
-
 if("${CMAKE_CXX_STANDARD}" EQUAL 98)
   message(FATAL_ERROR "Abseil requires at least C++11")
 elseif(NOT "${CMAKE_CXX_STANDARD}")
diff --git a/absl/copts/GENERATED_AbseilCopts.cmake b/absl/copts/GENERATED_AbseilCopts.cmake
index 57394c5..39b79c5 100644
--- a/absl/copts/GENERATED_AbseilCopts.cmake
+++ b/absl/copts/GENERATED_AbseilCopts.cmake
@@ -3,12 +3,6 @@
 # (1) Edit absl/copts/copts.py.
 # (2) Run `python <path_to_absl>/copts/generate_copts.py`.
 
-list(APPEND ABSL_CLANG_CL_EXCEPTIONS_FLAGS
-    "/U_HAS_EXCEPTIONS"
-    "/D_HAS_EXCEPTIONS=1"
-    "/EHsc"
-)
-
 list(APPEND ABSL_CLANG_CL_FLAGS
     "/W3"
     "-Wno-c++98-compat-pedantic"
@@ -80,10 +74,6 @@ list(APPEND ABSL_CLANG_CL_TEST_FLAGS
     "-Wno-gnu-zero-variadic-macro-arguments"
 )
 
-list(APPEND ABSL_GCC_EXCEPTIONS_FLAGS
-    "-fexceptions"
-)
-
 list(APPEND ABSL_GCC_FLAGS
     "-Wall"
     "-Wextra"
@@ -111,10 +101,6 @@ list(APPEND ABSL_GCC_TEST_FLAGS
     "-Wno-unused-private-field"
 )
 
-list(APPEND ABSL_LLVM_EXCEPTIONS_FLAGS
-    "-fexceptions"
-)
-
 list(APPEND ABSL_LLVM_FLAGS
     "-Wall"
     "-Wextra"
@@ -183,12 +169,6 @@ list(APPEND ABSL_LLVM_TEST_FLAGS
     "-Wno-gnu-zero-variadic-macro-arguments"
 )
 
-list(APPEND ABSL_MSVC_EXCEPTIONS_FLAGS
-    "/U_HAS_EXCEPTIONS"
-    "/D_HAS_EXCEPTIONS=1"
-    "/EHsc"
-)
-
 list(APPEND ABSL_MSVC_FLAGS
     "/W3"
     "/DNOMINMAX"
@@ -227,8 +207,6 @@ list(APPEND ABSL_RANDOM_HWAES_ARM64_FLAGS
 )
 
 list(APPEND ABSL_RANDOM_HWAES_MSVC_X64_FLAGS
-    "/O2"
-    "/Ob2"
 )
 
 list(APPEND ABSL_RANDOM_HWAES_X64_FLAGS
diff --git a/absl/copts/GENERATED_copts.bzl b/absl/copts/GENERATED_copts.bzl
index 18dbb68..7d645cc 100644
--- a/absl/copts/GENERATED_copts.bzl
+++ b/absl/copts/GENERATED_copts.bzl
@@ -4,12 +4,6 @@
 (2) Run `python <path_to_absl>/copts/generate_copts.py`.
 """
 
-ABSL_CLANG_CL_EXCEPTIONS_FLAGS = [
-    "/U_HAS_EXCEPTIONS",
-    "/D_HAS_EXCEPTIONS=1",
-    "/EHsc",
-]
-
 ABSL_CLANG_CL_FLAGS = [
     "/W3",
     "-Wno-c++98-compat-pedantic",
@@ -81,10 +75,6 @@ ABSL_CLANG_CL_TEST_FLAGS = [
     "-Wno-gnu-zero-variadic-macro-arguments",
 ]
 
-ABSL_GCC_EXCEPTIONS_FLAGS = [
-    "-fexceptions",
-]
-
 ABSL_GCC_FLAGS = [
     "-Wall",
     "-Wextra",
@@ -112,10 +102,6 @@ ABSL_GCC_TEST_FLAGS = [
     "-Wno-unused-private-field",
 ]
 
-ABSL_LLVM_EXCEPTIONS_FLAGS = [
-    "-fexceptions",
-]
-
 ABSL_LLVM_FLAGS = [
     "-Wall",
     "-Wextra",
@@ -184,12 +170,6 @@ ABSL_LLVM_TEST_FLAGS = [
     "-Wno-gnu-zero-variadic-macro-arguments",
 ]
 
-ABSL_MSVC_EXCEPTIONS_FLAGS = [
-    "/U_HAS_EXCEPTIONS",
-    "/D_HAS_EXCEPTIONS=1",
-    "/EHsc",
-]
-
 ABSL_MSVC_FLAGS = [
     "/W3",
     "/DNOMINMAX",
@@ -228,8 +208,6 @@ ABSL_RANDOM_HWAES_ARM64_FLAGS = [
 ]
 
 ABSL_RANDOM_HWAES_MSVC_X64_FLAGS = [
-    "/O2",
-    "/Ob2",
 ]
 
 ABSL_RANDOM_HWAES_X64_FLAGS = [
diff --git a/absl/copts/configure_copts.bzl b/absl/copts/configure_copts.bzl
index 8c4efe7..2829e4e 100644
--- a/absl/copts/configure_copts.bzl
+++ b/absl/copts/configure_copts.bzl
@@ -6,13 +6,10 @@ change Abseil copts, edit absl/copts/copts.py
 
 load(
     "//absl:copts/GENERATED_copts.bzl",
-    "ABSL_GCC_EXCEPTIONS_FLAGS",
     "ABSL_GCC_FLAGS",
     "ABSL_GCC_TEST_FLAGS",
-    "ABSL_LLVM_EXCEPTIONS_FLAGS",
     "ABSL_LLVM_FLAGS",
     "ABSL_LLVM_TEST_FLAGS",
-    "ABSL_MSVC_EXCEPTIONS_FLAGS",
     "ABSL_MSVC_FLAGS",
     "ABSL_MSVC_LINKOPTS",
     "ABSL_MSVC_TEST_FLAGS",
@@ -36,16 +33,6 @@ ABSL_TEST_COPTS = ABSL_DEFAULT_COPTS + select({
     "//conditions:default": ABSL_GCC_TEST_FLAGS,
 })
 
-ABSL_EXCEPTIONS_FLAG = select({
-    "//absl:windows": ABSL_MSVC_EXCEPTIONS_FLAGS,
-    "//absl:llvm_compiler": ABSL_LLVM_EXCEPTIONS_FLAGS,
-    "//conditions:default": ABSL_GCC_EXCEPTIONS_FLAGS,
-})
-
-ABSL_EXCEPTIONS_FLAG_LINKOPTS = select({
-    "//conditions:default": [],
-})
-
 ABSL_DEFAULT_LINKOPTS = select({
     "//absl:windows": ABSL_MSVC_LINKOPTS,
     "//conditions:default": [],
diff --git a/absl/copts/copts.py b/absl/copts/copts.py
index 0db6e06..a542541 100644
--- a/absl/copts/copts.py
+++ b/absl/copts/copts.py
@@ -109,12 +109,6 @@ LLVM_TEST_DISABLE_WARNINGS_FLAGS = [
     "-Wno-gnu-zero-variadic-macro-arguments",
 ]
 
-MSVC_STYLE_EXCEPTIONS_FLAGS = [
-    "/U_HAS_EXCEPTIONS",
-    "/D_HAS_EXCEPTIONS=1",
-    "/EHsc"
-]
-
 MSVC_DEFINES = [
     "/DNOMINMAX",  # Don't define min and max macros (windows.h)
     # Don't bloat namespace with incompatible winsock versions.
@@ -157,18 +151,14 @@ COPT_VARS = {
         "-Wno-unused-parameter",
         "-Wno-unused-private-field",
     ],
-    "ABSL_GCC_EXCEPTIONS_FLAGS": ["-fexceptions"],
     "ABSL_LLVM_FLAGS":
         LLVM_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS,
     "ABSL_LLVM_TEST_FLAGS":
         LLVM_TEST_DISABLE_WARNINGS_FLAGS,
-    "ABSL_LLVM_EXCEPTIONS_FLAGS": ["-fexceptions"],
     "ABSL_CLANG_CL_FLAGS":
         (MSVC_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS + MSVC_DEFINES),
     "ABSL_CLANG_CL_TEST_FLAGS":
         LLVM_TEST_DISABLE_WARNINGS_FLAGS,
-    "ABSL_CLANG_CL_EXCEPTIONS_FLAGS":
-        MSVC_STYLE_EXCEPTIONS_FLAGS,
     "ABSL_MSVC_FLAGS":
         MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES + [
             # Increase the number of sections available in object files
@@ -193,8 +183,6 @@ COPT_VARS = {
         "/wd4996",  # use of deprecated symbol
         "/DNOMINMAX",  # disable the min() and max() macros from <windows.h>
     ],
-    "ABSL_MSVC_EXCEPTIONS_FLAGS":
-        MSVC_STYLE_EXCEPTIONS_FLAGS,
     "ABSL_MSVC_LINKOPTS": [
         # Object file doesn't export any previously undefined symbols
         "-ignore:4221",
@@ -209,8 +197,5 @@ COPT_VARS = {
         "-maes",
         "-msse4.1",
     ],
-    "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS": [
-        "/O2",  # Maximize speed
-        "/Ob2",  # Aggressive inlining
-    ],
+    "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS": [],
 }