Export of internal Abseil changes.

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fcf9d3facb12451964ad1850073cbfb6f9739379 by CJ Johnson <johnsoncj@google.com>:

Makes it obvious to readers that the comparison operators do not branch more than needed

PiperOrigin-RevId: 240811527

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680c586f81f805be68e96caffb28d5f46b6a6511 by Jon Cohen <cohenjon@google.com>:

Consistently use "if(" instead of "if (" in CMake files

PiperOrigin-RevId: 240621819

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c4acc506648622389f33f564fd94f8dda08cb61a by Tom Manshreck <shreck@google.com>:

Internal change

PiperOrigin-RevId: 240619556

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ddbc1894944aae96767c876a1ae8696ddaba42a2 by Jon Cohen <cohenjon@google.com>:

Remove the warning about install prefixes when we aren't installing abseil

PiperOrigin-RevId: 240614750

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086c4fad213d99e875038bc8a1c7268e28a7ebf3 by Abseil Team <absl-team@google.com>:

Adjust some tests and test cases which fail on WebAssembly

PiperOrigin-RevId: 240592367

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46c2c09723a37ef4911ae3c64aab92e3f0fdba79 by Abseil Team <absl-team@google.com>:

CMake install target update
- Add prefix absl_ to each target when install rule are disabled.
- Disable all install commands when absl is used as subdirectory (Fix #287)

PiperOrigin-RevId: 240575083

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8d88063ed5b16f982a91950693d37ca18fdd46d8 by Jon Cohen <cohenjon@google.com>:

Correctly link to Threads::Threads for a few cmake targets which were missing it.

PiperOrigin-RevId: 240574513
GitOrigin-RevId: fcf9d3facb12451964ad1850073cbfb6f9739379
Change-Id: I031c57de8cd88554348eb8bd1371d01d15ff1fc7

CMake/AbseilHelpers.cmake

@@ -59,7 +59,7 @@ set(ABSL_IDE_FOLDER Abseil)
 #   SRCS
 #     "b.cc"
 #   DEPS
-#     absl_internal_awesome # not "awesome"!
+#     absl::awesome # not "awesome" !
 #   PUBLIC
 # )
 #
@@ -68,7 +68,7 @@ set(ABSL_IDE_FOLDER Abseil)
 #     main_lib
 #   ...
 #   DEPS
-#     absl::fantastic_lib # since fantastic_lib is public
+#     absl::fantastic_lib
 # )
 #
 # TODO: Implement "ALWAYSLINK"
@@ -80,8 +80,12 @@ function(absl_cc_library)
     ${ARGN}
   )
 
-  if (NOT ABSL_CC_LIB_TESTONLY OR ABSL_RUN_TESTS)
-    set(_NAME "${ABSL_CC_LIB_NAME}")
+  if(NOT ABSL_CC_LIB_TESTONLY OR ABSL_RUN_TESTS)
+    if(ABSL_ENABLE_INSTALL)
+      set(_NAME "${ABSL_CC_LIB_NAME}")
+    else()
+      set(_NAME "absl_${ABSL_CC_LIB_NAME}")
+    endif()
 
     # Check if this is a header-only library
     # Note that as of February 2019, many popular OS's (for example, Ubuntu
@@ -93,7 +97,7 @@ function(absl_cc_library)
         list(REMOVE_ITEM ABSL_CC_SRCS "${src_file}")
       endif()
     endforeach()
-    if ("${ABSL_CC_SRCS}" STREQUAL "")
+    if("${ABSL_CC_SRCS}" STREQUAL "")
       set(ABSL_CC_LIB_IS_INTERFACE 1)
     else()
       set(ABSL_CC_LIB_IS_INTERFACE 0)
@@ -155,7 +159,7 @@ function(absl_cc_library)
 
     # TODO currently we don't install googletest alongside abseil sources, so
     # installed abseil can't be tested.
-    if (NOT ABSL_CC_LIB_TESTONLY)
+    if(NOT ABSL_CC_LIB_TESTONLY AND ABSL_ENABLE_INSTALL)
       install(TARGETS ${_NAME} EXPORT ${PROJECT_NAME}Targets
             RUNTIME DESTINATION ${ABSL_INSTALL_BINDIR}
             LIBRARY DESTINATION ${ABSL_INSTALL_LIBDIR}

CMake/AbseilInstallDirs.cmake

@@ -6,7 +6,7 @@ include(GNUInstallDirs)
 # Abseil's internal Copybara (https://github.com/google/copybara) workflows and
 # isn't visible in the CMake buildsystem itself.
 
-if (absl_VERSION)
+if(absl_VERSION)
   set(ABSL_SUBDIR "${PROJECT_NAME}_${PROJECT_VERSION}")
   set(ABSL_INSTALL_BINDIR "${CMAKE_INSTALL_BINDIR}/${ABSL_SUBDIR}")
   set(ABSL_INSTALL_CONFIGDIR "${CMAKE_INSTALL_LIBDIR}/cmake/${ABSL_SUBDIR}")

CMake/abslConfig.cmake.in

@@ -1,5 +1,6 @@
-## absl CMake configuration file.  Note that there is no corresponding
-# abslConfigVersion.cmake since non-LTS Abseil isn't versioned.
+# absl CMake configuration file.
+
+include(FindThreads)
 
 @PACKAGE_INIT@